Very intelligent explanation of the Zenith Stromberg carbs. I'm helping a friend tune his newly purchased 1974 Triumph TR6 with these carbs. His are super lean and when the adjustment tool shows up in the mail, we will fix it. Plugs are white and it backfires and won't start easily, so richer is what they need. The person that rebuilt them recently didn't do any adjustments. Thanks, great video.
@kumanowatanabe11714 ай бұрын
Thank you! This is my second day trying to set up a ZS 175-2 on a V8 Range Rover. It’s easier to catch the devil by the tail... Tomorrow I’ll try to do everything according to your instructions.I repaired Japanese carburetors in Russia for 3 years. For loaders and cars, old and new, I even had experience with a double DeLlorto on an Alfa Romeo. Now in the Balkans I come across cars that I have never seen before. And the first time I encountered a “motorcycle” type of carburetor and I can’t adjust it to a leaner mixture. The fuel I see coming in looks like I pressed the toilet flush. :)
@mayflowerlash113 жыл бұрын
I am impressed. Nuts and bolts are easy. Adjusting a non-adjustable Stromberg is something else. I have never fully understood carburettors. Your explanation goes a long way to clarifying how they work. And I note your previous experience with Webers. lol. I agree with your comment that original is usually best. Those engineers, back in the day, were not fools. they designed the car as a balanced system, so stick with their wisdom. The twin Strombergs give that engine a gorgeous sound. Cheers.
@gregjohnson68932 жыл бұрын
well detailed and explained video on the CD175 thanks
@secularnevrosis3 жыл бұрын
A good replacement for the carbs are Mikunis. Both the Strombergs and SU are good if they are tuned...and in good condition. Webers are good if you get one with the proper throats. But we should also remember that Webers are also old designs and prone to giving you too much fuel when used for engines that are not tuned as high preformance ones.
@victorpelini59952 жыл бұрын
Weber are annoying in the low range, they tend to be too rich for slow cruse.
@Gothamauto3 жыл бұрын
This brought back a memory of my Dad's 145, being worked on by Wolf Volvo in Manhattan. The owner himself took an interest, and removed two plastic caps from the jet adjustments of the SU carbs. This 1968 car already had an anti-tamper emissions device of a sort. It wouldn't be many years before the emissions equipment became both more extensive and more intrusive. The years before Lambda-Sond were dark times.
@aluminati99183 жыл бұрын
Thanks for great vid! The engine sound after you tuned it was very “Volvo”! I found Strombergs to be very reliable on my Volvo 140. Had to change the rubber diaphragm once in 20 years/ 100k miles. Consumption was approx 26mpg, but that was a smaller 2.0L engine of course.
@jfv653 жыл бұрын
The number of cylinders is irrelevant. Yes, carbs can be reliable, specially when they are tuned right and frequently used. Millions of multi-cylinder multi-carbed motorcycles have used them very succesfully until the switch to efi. One mayor issue can spoil your carbs and that was the introduction of ETHANOL in gasoline. Ethanol is corrosive and not all old gaskets, rubber seals and hoses can stand up to ethanol.
@chaunceylocklear36618 ай бұрын
Love your videos dude. Thanks for your work to film and share.
@the_realJP_ Жыл бұрын
Great explanation and video!
@MrFengen3 жыл бұрын
Thank you for all the TOTO music. Live in Amsterdam, Old is New.. Nice
@TheDIDSBIAK3 жыл бұрын
WOW, that was enlightening. Many years ago I used to do some adjustments on my Volvo's 145, 164 (Zenith 175 CD) and Rover P6 (SUHS8) I wish I knew this then. This would have caused less frustrations 😁😂😄 Thanks for sharing 😎👍
@Chr.U.Cas16223 жыл бұрын
Dear David Bello. Okay, that was a lot of theoretical/technical stuff to digest. But again and as always, very well done (video, work, explanations)! 👍👌👏 Congrats for being sooo patient! By the way (and to be completely honest): What I learned because of this video is to throw SU, Stromberg and Weber carburetors into the bin and use fuel injection systems (unless you have well fabricated and fully adjustable Japanese carburetors)! As always: Thanks a lot for making teaching explaining recording editing uploading and sharing. Best regards, luck and health. Post Scriptum: Unfortunately it looks as if the gofundme campaign was started a bit too late. I nonetheless hope and wish that you reach your goal. Good luck!
@chriskonrad37133 жыл бұрын
I had a pair of Zeniths on my TR7 when I was a kid. They would fall out of tune if you looked at them wrong. You just have to get used to adjusting them every 3-4 weeks.
@Cwazywazy1403 жыл бұрын
Any misfiring or pre-sensor exhaust leak will send the sensor reading way lean and jittery fyi.
@DeanofMachines3 жыл бұрын
Dude you have a great voice! Love the Volvo content too.
@superuggero3 жыл бұрын
Great video, as always. My mechanic teached me how to adjust the dual SU HS2 on my Mini and now maintaining those Is a real satisfaction. Now on the Fulvia there are Solex PHH and now I have to learn again how to. I guess it's how life it's intended to be.
@Lkkjbsu3 ай бұрын
Hi David! Amazing Video! I love these old Volvo's! I was hoping you could help me figure something out with my 1970 Volvo 145s I am restoring. My hot start valve appears to be broken (missing rod ). Can you bypass the valve and run the hoses from the air box and gas tank to a safe location? I also noticed my carb closest to the firewall is overflowing through the hose in the air box; stuck float? Any help is appreciated, I work on outboards but these are complicated.
@shanec59573 жыл бұрын
if you roll through denver we will are looking out for you
@IIHenkell Жыл бұрын
Hi! I need help with mine. When you lift the valve inside the carburator how stiff are they? One of mine is light like it got no resistence and the other one has a bit of resistance. What is right or wrong?
@classicvolvorestorations38483 жыл бұрын
I have the same carb in my 142, it can be a excellent carb. I converted to the adjustable jet conversion when rebuilding and that makes it a much better carb and so easy to adjust. Got my idle set at about 13.2:1, cruise is between 14 and 15 and wot 12.5. It starts always instantly cold or hot, good power and economical. Also you can get a couple of versions of the diaphragm, Burlens in the U.K. sell the proper one and it’s thin and very pliable so the piston moves freely. The thicker one you can also get doesn’t work as well. If you set the carb as per Volvos recommendation, when it just gets max rpm at idle when adjusting the jet it should be pretty much spot on at about 13.2:1 at idle. Excellent carbs just needs a little tlc and understanding.
@hernanmadoz31972 жыл бұрын
Hola David , tengo un pequeño bote , estoy en argentina y tiene dos motores volvo penta , con dos carburadores iguales , a estos que mostraste, cada uno de ellos, , mi problema es que no consigo las agujas , hay dos que están quebradas , por que fueron mal montadas, , me podrías decir si aun se consiguen estas piezas , saludos muy buenos vídeos.
@andrewmcgill49573 жыл бұрын
Really surprised to see your carbs with non adjustable needle's. My single Zenith 175 CD-2SE has the adjustable needle with the allen head adjustment screw. If I were you I would put a gasket on that choke mechanism. Just make sure to get the right one. I recently ordered all the proper gaskets for my carb directly from Volvo. Excited to get my 244 (Canadian spec) back on the road. Love the channel by the way! Wish the land borders were open so I could make it to the Volvo meet.
@classicvolvorestorations38483 жыл бұрын
Not all the chokes have a gasket, if it didn’t originally have one then it shouldn’t have one.
@Davran27423 жыл бұрын
Do you use a colour tune kit? I had one when I had my Brit cars.
@helgehanssen68062 жыл бұрын
Hi. have a little problem. I have a Strömberg carburetor with adjustable needle. I have replaced the diaphragm and rubber ring on the needle. unfortunately I did not measure the needle height before I disassembled the carburetor. I have access to a lamb meter of the type that the car inspection has for measuring environmental emissions. I work as a car mechanic but of the age that does not work with carburetors only injection. the problem is that I can not test drive in the same way as the carburetor is not sitting on a car, it is sitting on an airplane. so the question is can i use this measuring equipment to adjust the needle. the equipment measures co / co2 / hc / oxygen and calculates a lambda value. the difference between aircraft and car engines is that the aircraft engine runs at very low revs, ours is a maximum rev 2800 rpm. do you have any idea how much throttle is needed to give a good result when measuring and adjusting and if it can be done with this measuring equipment. with best regards Helge
@richardkleihorst13043 жыл бұрын
Hi Dave, why don't you use the colourtune?
@Bob-nu3xe Жыл бұрын
finding the rubber diaphragm split was like finding out your daughter WASN'T pregnant! lol
@grapsorz3 жыл бұрын
hmm how come you never had the weber working? i used to run a DCD36/36 and it was PERFECT. it gave REAL good performance (it stopped delivering at 140-160hp somewhere) and MPG was in the 30-32 range on long trips etc. never missed a beat. never had to adjusted it EVER think we ran it for over 100 000km. when i had the Stromberg or Pitsburg carb's in the car i always had the adjuster tool (that you put down the piston cap) or a socket for adjusting the under side on the pitsburg in the glovebox (and a extra diafram). it made them work OK. never as good as the weber. got it down to about 25-28mpg
@victorpelini59952 жыл бұрын
Think he got a "new" 32 36, the quality is random on spanish made webers, remember we talked abt it
@grapsorz2 жыл бұрын
@@victorpelini5995 think mine was made in italy
@victorpelini59952 жыл бұрын
@@grapsorz yeah, the Italian ones are better
@Andy-sh9eq3 жыл бұрын
Is the replacement bosch sensor a wideband sensor a lot of the gauges come with a crappy Chinese narowband sensor.
@iracema13 жыл бұрын
I'll never complain again about my Alfa-Romeo SPICA mechanical fuel injection!
@DavidBello3 жыл бұрын
Somehow I think that is more complicated but I may be projecting from the volvo K-jet turbo stuff
@jfv653 жыл бұрын
So many euro alfa owners imported US-Alfa's with Spica injection and just removed it and replaced it with proper twin Del-Orto's or twin Weber's. Easier, more reliable and you got more power as well. All win!
@EnriqueLopez-hb5jn3 жыл бұрын
How do the Mikunies that you justed on an Amazon compare to the SUs or the Strombergs, they look like they are easier to work with, what do you think
@jfv653 жыл бұрын
Most mikuni and keihin , etc are also constant vacume carburettors. Because they come from the performance oriented world of motorcycles they tend to be very easily adjustable with a wide selection of jets and needles available aftermarket (just look for dynojet kits). I have seen Volvo redblock rallye engines make great power using 4 mikuni harley davidson carbs.
@angus39633 жыл бұрын
Is there any oil in those dash pots?!
@mortenpietsch33133 ай бұрын
you cant compare webers to su's. just because you failed on the webers as everybody does, it doesnt mean chüosing su's is as just as bad of a choice. they are far more reliable and adjustable. and have no temperature strip and whatsoever
@nigelskelchy3 жыл бұрын
Dang dude. You know a shit load about these things. 😁
@Stale_Mahoney3 жыл бұрын
how does she feel now?
@louvendran72733 жыл бұрын
Why? Why? Why? I can never understand it. So many bad memories of carbs. I always remove them if I am building up an older car.
@fortune3003 жыл бұрын
From what i know BP6HS is the right spark plugs for B30A, BP7HS is too coold and will accumulate soot.
@GrauBuntStachelig3 жыл бұрын
Isn’t rich better than lean for the engine?
@jfv653 жыл бұрын
'Better' is not the right word. Safer, yes. You will not damage the engine very fast. Lean is risky, you can damage the engine. But too rich is also not good. The excess of fuel washes the lubrication oil from the cylinder walls which accelerates wear. You want to get AFR in the right ballpark : Idle + light cruise: 14.7:1 Medium load, faster cruise: 14.7 gradually rising to 12.5:1 the more load you give it. Full power/ wide open throttle: 12:1-ish. ( Ideally you would want to test this on a chassis dyno so you can tune for max power.)
@classicvolvorestorations38483 жыл бұрын
@@jfv65 a SU and a Stromberg should idle at about 13.2:1. It will idle better and when changing gear it won’t go lean and cause backfires. If you follow Volvos recommendation on how to set mixtures at idle it should result in about 13.2:1 with the correct needle/jet/spring. Needle position should then be pretty good for stock engines. A wideband 02 sensor makes it easy to tune WOT and cruise if not a standard engine. Dashpot oil choice will also effect things.
@GrauBuntStachelig3 жыл бұрын
What about the well known method to pull the piston and see what happens? If it is getting faster too rich, if it is getting slower too lean.
@classicvolvorestorations38483 жыл бұрын
@@GrauBuntStachelig don’t know where that sets things myself. The method Volvo suggests is to increase the mixture at idle until the revs stop increasing and then turn it back one flat on the jet. It should see max revs with a 12.5:1 fuel ratio and then turning it back one flat should lean the mix to about 13.2. I have a multimeter which can read engine rpm so makes that method dead easy to do.
@Colormanify Жыл бұрын
👍🏻
@Broke4speed3 жыл бұрын
Innovate stuff is typically crap. Avoid.
@classicvolvorestorations38483 жыл бұрын
Nothing wrong with the Innovate wide band, I have it and works spot on. It is a Bosch sensor and the gauge just measures volts so is basic stuff and works as it should.
@Broke4speed3 жыл бұрын
@@classicvolvorestorations3848 Far from my experiences over the last 15 years. There are so many other, better options.