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Пікірлер
@user-zu2ed6ye5w Күн бұрын
Do you block the old holes ??
@holleycarbshowtosadvice40y90 Күн бұрын
You have to leave the holes open. Hope this helps.
@user-zu2ed6ye5w 3 күн бұрын
What does the holley book cover look like, i want one , There are so many books out there!
@holleycarbshowtosadvice40y90 2 күн бұрын
The holley book i have just mainly deals with specs and parts. I'll get that information for you in the next couple days.
@holleycarbshowtosadvice40y90 23 сағат бұрын
My book is the ( Holley Performance Products 2012 ) there may be an updated version now. My copy is falling apart lol. Hope this helps.
@paulhershberger8774 3 күн бұрын
I have a Holley 670 on my 390 FE. It’s dialed in pretty close. On transfer slot steady driving my afr is about 12.8 to 13.8. When I nail it,it goes lean briefly. All the way to 20 on the afr. My idle restrictor is a .035 and my air bleed is a .075. If it’s rich before I wack it why is it going very very lean until the power valve and secondaries catch up? 670 truck avenger. NOS. Brown spring on vacuum secondary.
@holleycarbshowtosadvice40y90 2 күн бұрын
Sounds like either your accelerator pump discharge nozzles are to small or your pump is not working correctly or both. Hope this helps.
@genemanno1533 4 күн бұрын
The 67 Corvette Holley (2 idle screws) uses IFR’s measuring .028”, so I stay in the .025” to .029” range more importantly w/4 corner. Favoring .025” IFR & smaller IAB’S. There is a range (IFR/IAB) of air to fuel ratio of around 19:1 area wise that seems to work well. Too big an IAB kills fuel velocity. I find modern Quick Fuel/Holley’s everything is too big. So one needs to recalibrate EVERY ORIFACE (IFR, IAF, PVR, JETS, everything) right out of the box to avoid black spark plugs, overly rich, and stinky exhaust. The transfer slots need to be restricted from .106” down to .081”/.078” because the T slots are too big. I’m talking street use not drag racing. I like your series😊
@holleycarbshowtosadvice40y90 3 күн бұрын
19 -1 is way to lean , usually they won't even idle at 19-1, if now talking about a stock engine yes it is much easier to figure your fuel curve A typical 4 corner idle circuit you need to limit your ifr size and increase your iab size, now if you add a racing cam you have to bypass enough air to correct your transfer slots and then you work with your ifr and iab . Hope this helps.
@benjiedelrosario4346 7 күн бұрын
I have a 289 sbf w/ a big cam and it idles between 1200-1400 rpm. Anything lower than that and engine stalls. Any idea how I can bring down the idle between 1000-1200 rpm? Thanks in advance 🙂
@holleycarbshowtosadvice40y90 6 күн бұрын
My nova was mostly used as a drag car, but when I locked out my distributor advance the engine idled so much better. There are several ways to do this, a full lock out or recurve the distributor advance, recurving the advance means for instance you might want to set your ignition timing to 26 degrees initially and bring 8 or 10 degrees in mechanically for your total ignition advance of maybe 34 to 36 degrees. You will probably need a start retard box to retard timing while cranking. I ran MSD ignition with a start retard box on mine but other companies offer the same thing. Hope this helps
@benjiedelrosario4346 6 күн бұрын
@@holleycarbshowtosadvice40y90 Thanks for the tip. Will try this out and let you know result 🙂
@ttrm007 12 күн бұрын
Your videos are VERY informative. Thanks.
@holleycarbshowtosadvice40y90 12 күн бұрын
Glad you like them!
@clashofclams19 13 күн бұрын
What would happen if you put another primary metering block on the back?
@holleycarbshowtosadvice40y90 13 күн бұрын
Thats part of converting from a 2 circuit to a 4 circuit idle system. I have a video that covers the complete modification.
@tonycolca2241 19 күн бұрын
Great video quickfuel ss models come with metering blocks that have screw in everything also air bleeds. They are expensive !
@holleycarbshowtosadvice40y90 19 күн бұрын
Absolutely!
@imcool-rh1xg 22 күн бұрын
Could i theoretically put a 1000 throttle plate on a 600 or something similar for maximizing velocitie
@holleycarbshowtosadvice40y90 22 күн бұрын
The largest 4150 throttle plate i believe is 1.800 , unless its totally custom. I don't know if you have enough material to match the main body to the throttle plates.
@imcool-rh1xg 22 күн бұрын
@@holleycarbshowtosadvice40y90 so if I had enough material to grind out I could do it
@holleycarbshowtosadvice40y90 3 күн бұрын
Would have to relocate idle circuit and make sure there is sufficient clearence between the butterflies and main body. I have never attempted this so your on uncharted ground.
@paulhershberger8774 22 күн бұрын
Thanks!
@holleycarbshowtosadvice40y90 22 күн бұрын
Thank you
@mikeyb1835 28 күн бұрын
So when you go from 750 base to 850 base are you picking up flow and velocity?The venturi size is staying same just increasing the base plate bore size.
@holleycarbshowtosadvice40y90 27 күн бұрын
Yes and i always blend the main body to fit the throttle plates.
@kerrygatling663 28 күн бұрын
What would be a good emulsion size bleed for a blow though billet metering block carb to start with? As always you one of the easiest to understand videos on the tube out there.
@holleycarbshowtosadvice40y90 28 күн бұрын
I sorry I don't do blow through carb stuff.
@prayfawind 29 күн бұрын
my 4160 Cab on my 390 engine, i had to spray gas into the Carb for the car to start it wasn't spraying when you press gas, , i rebuilded the carb now it's spraying but now i have to press the gas to start the car once i stop pressing gas car turns off, any suggestions please?
@holleycarbshowtosadvice40y90 28 күн бұрын
Check your gasket between the main body and throttle plate, the wrong gasket can block the idle circuit and cause it not to idle.
@kerrygatling663 29 күн бұрын
Great explanation ON boosters👍
@holleycarbshowtosadvice40y90 29 күн бұрын
Thanks
@user-hv4vx5gb1d Ай бұрын
Outstanding 😊
@holleycarbshowtosadvice40y90 29 күн бұрын
Thanks
@do6724 Ай бұрын
Hi Randy, I have a 750 main body & metering blocks that accept screw in type air bleeds. What size do you think I should start with?(base line) I’m starting from scratch. 70 chevelle 454 comp cam. 4corner ldle & the metering blocks have 4 circuits. Thanks!
@holleycarbshowtosadvice40y90 Ай бұрын
Is your emulsion circuit adjustable?
@do6724 Ай бұрын
@@holleycarbshowtosadvice40y90 yes. Billet aluminum aftermarket block.
@holleycarbshowtosadvice40y90 29 күн бұрын
I need to know how many emulsion holes and what brand block
@do6724 29 күн бұрын
@@holleycarbshowtosadvice40y90 Deepmotor Manufacturer Part Number DM-1110MB. Thanks again for your time & support!
@holleycarbshowtosadvice40y90 28 күн бұрын
I'll have you a fuel curve tomorrow.
@rogerstill719 Ай бұрын
I know this thread is Old, however I figured you would receive my question... I have a metering block with a place for a power valve but with no pvcr. I guess my stupid question is: is that just a mistake?
@holleycarbshowtosadvice40y90 Ай бұрын
If the power valve threads are there and has not been modified then I would say its miss built, you can always drill your pvcr. Hope this helps.
@Sway_-wy7iu Ай бұрын
Do you guys rebuild carburetors for other people or just yourself? I’d love to send you guys a carb and have it redone by you guys!!!
@holleycarbshowtosadvice40y90 Ай бұрын
Due to health problems , l'm not rebuilding at this time. Sorry.
@ryanjamison8905 Ай бұрын
Great video ! Thank you 😁
@holleycarbshowtosadvice40y90 Ай бұрын
Glad to help
@woodey028 Ай бұрын
Love this information. Thank you for sharing Randy. I just put together a 500" 440. Has a QFT 950. And my afr is in the 10.0:1 range. I'm going to follow this advice and tune it properly. She's a mean mopar.
@holleycarbshowtosadvice40y90 Ай бұрын
Just don't go to lean and thanks for watching.
@dogsense3773 Ай бұрын
Had two new fuel pumps mechanical, and had 12psi and 14psi flooded like hell,put on fuel regulator 5psi called it a day
@holleycarbshowtosadvice40y90 Ай бұрын
Did you order high pressure pumps?
@dogsense3773 Ай бұрын
@@holleycarbshowtosadvice40y90 stock pumps for a 67 cougar 289
@holleycarbshowtosadvice40y90 Ай бұрын
If those fuel pumps are factory stock there defective, pressure should be around 5 to 6psi no stock carburetor will hold that kind of pressure period. When the internal bypass stops up, thats whats causing the high fuel pressure.
@dogsense3773 Ай бұрын
@@holleycarbshowtosadvice40y90 thanks! Just got my 3rd pump today, and this one at 5.6 psi, works great, I'm 68 and for the last 7 years I volunteer in a restoration shop for cars 1924 - 1980, one or two days a week,you got to stay busy, I was the care taker for alcatraz island ,the only maintenance worker on the island , it was hell with 5,000 tourist every day on 22 arces of island! Thanks my friend!
@jeffkarker8693 Ай бұрын
Can you install some boosters in mine?
@holleycarbshowtosadvice40y90 Ай бұрын
Sorry can't do.
@garhpd Ай бұрын
Great advice!
@holleycarbshowtosadvice40y90 Ай бұрын
Thanks
@drewsXR650L Ай бұрын
will stall out when hot at low RPM, then very hard to get going again, the rotational mass thing makes sence.. adjusted values the other day, will try to look at them again, no clue have tried every thing imaginable to resolve the issue.
@holleycarbshowtosadvice40y90 Ай бұрын
The one I fixed would restart but driving down the road when you pull the clutch in it would shut off. Crazy problems!
@drewsXR650L Ай бұрын
@@holleycarbshowtosadvice40y90 everything that I'm seeing leads to ignition coil, will get back after installing. :D
@drewsXR650L Ай бұрын
ignition coil was not it! Next steps is diafram replacement and checking valves again
@drewsXR650L 29 күн бұрын
After coil replace and diafram with pin hole replaced, went a second round to check valves, ONE WAS TIGHT! haha Bingo! Runs like a top at very low idle with lots of power, works now!
@garhpd Ай бұрын
Awesome explanation! Makes 100% sense
@holleycarbshowtosadvice40y90 Ай бұрын
Thanks
@theredwedge9446 Ай бұрын
Quick question for you. I have an original Holley 3310-2 that I restored. It has with a worn out original baseplate. I purchased a new 112-9 replacement baseplate made specifically for the first 4 generations on 3310. The transfer slots on the new unit are all the same length and short like the secondary transition slots are on most Holleys. The old base plate and my last two Holley carbs had longer primary transition slots. Could this 112-9 be a defect? All four T-slots measure .01945. Any ideas?
@holleycarbshowtosadvice40y90 Ай бұрын
Its hard to say without seeing it, I've set up Holleys with no transfer slots exposed at idle at all, so the idle mixture is controlled by the mixture screws only and the transfer slots operate only above idle. I have seen some machining errors on the transfer slots but rarely.
@derekcruz7576 Ай бұрын
thanks again
@holleycarbshowtosadvice40y90 Ай бұрын
Anytime.
@26tbucket Ай бұрын
Thus is the only explanation that has ever made sense. I now know that I adjusted idle too high and the teanfer slot is dumping fuel. May need to drill the holes. Hope u have a video on that
@holleycarbshowtosadvice40y90 Ай бұрын
I do have a video, i believe its under idle circuits mods for high duration camshafts, but you might try raising the secondary idle speed and lowering the primary side, sometimes this works if not then drill bypass holes. Hope this helps.
@ProleDaddy Ай бұрын
How about we put that solonoid on a movable bracket linkage and have a second one that can push that one? Now we have high idle for a/c and anti-diesel.
@holleycarbshowtosadvice40y90 Ай бұрын
Ford had a vacuum and electric solenoid combined back in the 80s , the electric was anti dieseling and the vacuum was the a/c kicker which worked off a vacuum solenoid that energized when the a/c clutch was turned on.
@desmondgriffin3924 Ай бұрын
Now that’s a screwdriver lol
@holleycarbshowtosadvice40y90 Ай бұрын
Its special lol
@jacobrusso9522 Ай бұрын
Hi. Thank you for a great understanding of the idle circuit. I just bought a summit 750cfm carb for my pontiac 421ci. The engine is very tame/lame. I can not get rid of my off idle stumble no matter what I do to the accelerator pump settings or idle mixture screws. If I'm barely cruising or at a stop and barely touch the peddle, it stumbles. I'm about to send it back but thought I'd ask your opinion.
@holleycarbshowtosadvice40y90 Ай бұрын
Alright do you have m08750vs or a traditional 750 holley, tell me what you've tryed so far any information will help.
@kerrygatling663 Ай бұрын
Not sure if this was asked before, but is there a visual way to look at a metering block to determine if it's a 3 or 4 circuit block?
@holleycarbshowtosadvice40y90 Ай бұрын
Look on the main body side of thr metering block, right above the idle circuit. Hope this helps.
@kerrygatling663 Ай бұрын
@@holleycarbshowtosadvice40y90 What should i be looking for?
@holleycarbshowtosadvice40y90 Ай бұрын
An extra hole above the idle circuit is your intermediate circuit.
@kerrygatling663 Ай бұрын
@@holleycarbshowtosadvice40y90 ok Thx u👍
@kerrygatling663 Ай бұрын
@@holleycarbshowtosadvice40y90 Thx you👍
@diychicken7279 Ай бұрын
Excellent details. Thanks a ton.
@holleycarbshowtosadvice40y90 Ай бұрын
Your welcome.
@Hinieken Ай бұрын
On a holley with front idle screws only 650 dp for e ample if you change front air bleeds should rear air bleeds be charged to match
@holleycarbshowtosadvice40y90 Ай бұрын
You can do it either way, you can change front only or you can change front and rear and square all four corners.
@keithcolvin8063 Ай бұрын
Great drill and tap video, but why did you do all that work
@holleycarbshowtosadvice40y90 Ай бұрын
There is basically two reasons, first reason is to hide it if the rules don't allow modifications, the other is if you damage the the original bleed in the air horn drilling it out.
@keithcolvin8063 Ай бұрын
Thank you
@zae95469 Ай бұрын
Probably the best and most understandable explanations I've ever heard. Great job! Thank you!
@holleycarbshowtosadvice40y90 Ай бұрын
Thanks
@williamapostolu5062 2 ай бұрын
Your videos have been great. Clear and educational. I have a pair of 4150s on a sbc with a holly 250 blower. Iam going through them and noticed the secondary air bleeds in the center (high speed?) appear to be closed on both carburators. These 650dps are 2 corner idle circuts carbs, does that something to do with it. Iam scratching my head here. Is this normal......
@holleycarbshowtosadvice40y90 2 ай бұрын
I'm not a blower guy but it seems they wanted to richen the mixture in the secondaries as rpms increased. Don't know if your blower is over driven or under driven but it sounds like they blocked the hsabs to help a lean condition. Hope this helps
@darylstephens4429 2 ай бұрын
hey Randy, love your videos. Is there a way I could contact you about my Holley issue that I’ve been chasing for a year now. I have rebuilt it 3 times and still same problem! Thank you
@holleycarbshowtosadvice40y90 2 ай бұрын
Yes I'll get back tomorrow.
@holleycarbshowtosadvice40y90 2 ай бұрын
Whats your email address? I'll email you my phone number.
@darylstephens4429 2 ай бұрын
great videos, my issue is with a 4160 600 cfm Holley, it idles fine but as soon as it goes off idle it seems to flood and skip or tremble and stumbles until you accelerate much more or return to curb idle. HELP!!! This is on a 1986 F150 with 351 HO engine Thanks in Advance
@holleycarbshowtosadvice40y90 2 ай бұрын
First with engine off look down the throat of the primaries to see if the accelerator pump is squirting the minute you move the throttle if its not check accel. Pump adjustment, also remove one of your bowl screws to drain fuel out of primary fuel bowl and check it for water or trash. Hope this helps, let me know if not fixed
@darylstephens4429 2 ай бұрын
I have tried many things to help solve this issue but still stumbles and sounds like a dead skip off idle. Air screw adjustment has no effect on idle speed.
@holleycarbshowtosadvice40y90 2 ай бұрын
Let me know what you have tryed to repair it
@darylstephens4429 2 ай бұрын
@@holleycarbshowtosadvice40y90 It would take me about an hour of typing to tell you what I have done to to try and fix this issue with the end result the same. Thank you for your reply. The only fix I know to do is replace the carb. Thank you for the great and detailed Holley videos.
@tommyz625 2 ай бұрын
Great video and provides a lot of information that I think has been missing in different internet discussions. Having a problem with a 1000 cfm dp down leg boosters, and hoping to maybe get pointed the right way. 500 cid bbc. Demon body with Holley 5 hole blocks (6 if you count kill bleed). This is in a boat and it’s under load all the time. Idle and transition are okay but once on the mains it continues to lean out. Jets are 91/98 with 070 pvcr primary. Emulsion is: kill bleed 027 then 028/0/028/0/0. Main air bleed is 28. Floats are right. Frustrated with how much jet I’ve needed. Dangerously lean at peak torque (4700 rpm - 14.2). Was going to drop the main air bleed to 025 and work way up. Close up the emulsion too?
@holleycarbshowtosadvice40y90 2 ай бұрын
Tom are your emulsion 0s are they blocked with screw in bleed plugs? Also give me your high speed bleed size and how high is your float level. I'm guessing your venturi is 1.560 and 1.750 throttle plates. Let me know.
@edbrown1080 2 ай бұрын
Are ya supposed to run the float spring with the nitro. Floats??
@holleycarbshowtosadvice40y90 2 ай бұрын
Yes I run a float spring with my nitrophyl floats.
@68pishta68 2 ай бұрын
on a progressive 2bbl I have 2 different booster sizes, does the smaller one go on the primary side? ones labeled a 509 and the other is a 555.
@holleycarbshowtosadvice40y90 2 ай бұрын
I'm not sure what carb your talking about but if the fuel inlet hole is larger on one of the boosters it should be the secondary. Hope this helps.
@theredwedge9446 2 ай бұрын
Randy, I just upgraded my 3310-2 from a 134-21 metering plate to a secondary metering block conversion Holley kit. The factory metering plate had .039-.040 IFR’s. This new metering block has .030 IFR’s. Does that mean I have to drill them to .039-.040? Any advice would help. This carb has no secondary idle. Only the tiny drip holes under the secondary transition. Thank you and great video!
@holleycarbshowtosadvice40y90 2 ай бұрын
I think I would try it with the .030 thousandth ifrs and see. The metering block is absolutely better than the plate. If it causes problems then I would change it. Hope this helps
@philb386 2 ай бұрын
Hi Randy I have watched these 2 vids multiple times before I started drilling the holes in the butterflys. Instant success ! I had been at my wits end trying to lean off the idle, these vids were the best explanation I could find. So I have solved one problem but created another now, I have a lean stumble off idle, not accelerator pump fault, that works fine this is a lean spot as you are at minimal throttle for instance like when you just want to creep the car along it will stall. If you blip the pedal it will move fine. Is this a lean transfer slot problem do you think. It didnt do this when is was running a rich idle. The carb is a 670 Brawler vac secondary. 4 corner idle. 6 months old. Kind regd's Phil. NZ
@holleycarbshowtosadvice40y90 2 ай бұрын
I need your ifr size. Make sure the float level is correct up to the sight hole this is critical and accelerator pump has no play at idle after drilling bypass holes. Sounds like the ifr circuit may be lean. Make sure ignition timing is set correct . Let me know. Hope this helps.
@tonycolca2241 2 ай бұрын
Very interesting I have always liked to rebuild and mess with carbs Thank You. !
@holleycarbshowtosadvice40y90 2 ай бұрын
Your welcome
@kloofyroland 2 ай бұрын
Hi Randy, I almost went and purchased a replacement metering plate with a bigger main hole but it looks like I can modify my current one in my 4160 2 corner 600cfm Holley carb. I got the carb mostly tuned right everywhere else and with regards to this video, I was wondering if there's a way to modify the metering plate to get rid of a ~1 second lean spot (15-16AFR) entering WOT (less than 1" vacuum). I think that's when my secondary throttle blades start opening. After that 1 second lean spot my AFR recovers to the 12.5-13AFR range as I stay at WOT for a few seconds more. I have my carb on a dual plane intake on a bone stock 302 with the yellow spring in the secondary diaphragm and it doesn't bog when I floor it to WOT. Please let me know if you have a solution for this issue. Thanks, Roland
@holleycarbshowtosadvice40y90 2 ай бұрын
Try changing from the yellow secondary spring to the brown spring, also make sure the secondary float level is set right. I think your secondaries are opening to quick. Hope this helps.
@kloofyroland 2 ай бұрын
@@holleycarbshowtosadvice40y90 Thanks Randy. I actually tried the brown spring before the yellow and the lean duration was worse. Float level good set to trickle out of sight hole while shaking car like the primary sight hole. Should I try maybe raising the float level by a quarter turn of the adjuster?
@holleycarbshowtosadvice40y90 2 ай бұрын
Usually the secondaries are opening to fast but you could try richen up the secondaries. Make sure in the secondary diaphragm housing that the ball check is there and some have a office instead of the ball check, make sure which ever one you have isn't missing. I would keep the float level setting you have, I always run the pink accelerator pump cam on the 4160s because of its long duration of pump shot, let me know if your still having problems, one of these ought to take care of it. hope this helps.
@kloofyroland 2 ай бұрын
@@holleycarbshowtosadvice40y90 I can try the brown spring one more time and record the data. Would it be okay for me to email you a graph plotting telemetry from a recent pull I did from cruise to WOT? I think I saw your email written here in some comments. The check ball is still in the secondary diaphragm housing. Will the pink accel pump cam still help even if I gradually get the throttle from cruise to WOT?
@holleycarbshowtosadvice40y90 2 ай бұрын
Before you do anything else check your secondary ifrs for blockage and if not blocked, richen your secondary ifr by.010 thousandths and see if that helps. Let me know.
@jdrods1519 2 ай бұрын
Awesome stuff! Thank you Randy!
@holleycarbshowtosadvice40y90 2 ай бұрын
Any time
@johnmiller-in5bt 2 ай бұрын
WHAT IF YOUR HOLLEY 750 SECONDARIES ARE FLOODING BAD? AND RUNNING FUEL IN YOUR CARBURETOR? AND i CANT ADJUST THE FLOAT LEVEL AT ALL HIGHER OR LOWER? ITS FLOODED .SO BAD threw THE OVER FLOW TUBES A FEW TIMES.. I REPLACED.THE NEEDLE AND SEAT.WAS STILL NO Adjustment? I HAD IT RUNNING AT 6PSI.ON GAUGE. CARB IS ONLY.10 months.old. i am draining the oil and changing filter. Since there.may.be some.fule.got.in the oil pan.what.do i do??.please help!!!😂
@holleycarbshowtosadvice40y90 2 ай бұрын
Check your fuel pressure first 5psi to 6psi max with a fuel pressure tester not a small line gauge, if its back fired it can also damage the float, check your float for damage externally and leaking internally and the surface where the o ring seals the needle and seat to the fuel bowl also make sure nothing is restricting the rear vent at the top of the main body. If this don't take care of it let me know. Hope this helps.
@plumbs7199 2 ай бұрын
I’m having trouble getting 14:1 cruise at 2500 rpm . 850 st Holley latest model . 408 Cleveland stroker , ported 3 v heads comp 294 b cam dur 250’s intake , 260’s exh. 106 lob centre , 105 int cent. 86 sec , 77 prim , 78 thou pvrc . Ib 76 hsb 35’s . Idle circuit.31 thou . Best I can get is 12.2:1 at cruise 2500 15” vacum . Could lean out the whole curve if I opened up the secondary blade stop ? Or should I lean out the idle circuit to .28 thou and the top ( billet metering block 3 hole) emulsion hole to .31 thou ? Has 6” vacum at idle . So just thinking that more air from the secondaries would lessen the transfer slot and lean out every thing . Looking at the T slot it’s more rectangle than square? Regards from Australia.
@holleycarbshowtosadvice40y90 2 ай бұрын
Send me your carb list number also 14:1 fuel ratio is way to lean for that engine.
@bgbalmes 2 ай бұрын
Hi Randy, I have a 4412 that I am try to richen up the idle circuit. I have the mixture screws almost all the way out and she is still lean. It has brass plugs at the top of the top of the idle circuit.0.40 is the size. What do you recommend me drill it out to make it richer. 0.43?
@holleycarbshowtosadvice40y90 2 ай бұрын
If your talking about the idle fuel restrictor .040 is plenty big enough, I'm guessing your idle circuit is blocked or restricted or you have a vacuum leak, you can drill your ifr out to. 043 but i don't think it'll help. Hope this helps.