Rotaries LOVE E85. Fuel Systems DO NOT. Corvette Upgrade!

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[@69strokefasterthanyourmum]

18:30 His palms are sweaty, knees weak, arms are heavy There's e85 on his sweater already, ROB SPAGHETTI!!

[@Phin_Again]

He's nervous, but on the surface he looks calm and ready to blow rotaries, but keeps on forgetting

[@matthias18]

@@Phin_Again but he wrote Down the fuel lines on a shrine

[@RobinsonHuso94]

@@Phin_Again what he built last, the whole croud laughs so loud. He opens his throttle but the torque won't come out

[@69strokefasterthanyourmum]

@@RobinsonHuso94 He's nervous, but on the surface he looks calm and ready To drop nitro, but he keeps on forgettin' What his car puts down, the whole crowd goes so loud He opens his throttle, but the horsepowers won't come out.... 😂

[@69strokefasterthanyourmum]

His engine is chokin', how, everybody's jokin' now The clocks run out, timing is off, over, now the apex seal says blaow! Snap back to reality, oh there goes reliability. Oh, there goes Rob, he choked He's so mad, but he won't give up that easy? No He won't have it, he knows his wires are shitty. Now, let the rest come..😂

[@OuchesVonDoom]

Looks like Rob Dahm is growing his hair out for the upcoming Wolverine casting call 😅

[@BenPortermike]

He is in LA. It's only a matter of time before he is taking Acting classes from James Franco and/or Shea LeBouef

[@SilverToolRacing]

I was going to say maybe looking for the Teen Wolf reboot. He is a shoe in either way. At least a stunt double

[@mikedale1142]

Stranger Things slangin ice cream

[@billybobjoe198]

4 rotor FD 3 rotor FD 2 rotor C5. 1 rotor Insight?

[@brian1828]

byw Coming soon: 4 rotor C8

[@dimacypher]

1 rotor bike

[@alexphillips4325]

I’d love to see a 1 rotor Insight.

[@wabash9000]

Team Boosted is building a 1 rotor. I don't think he should touch the insight because it defeats its purpose.

[@jackmeader9926]

1 rotor diablo

[@smashbox20]

watching Rob explain this fuel system... might as well have tried learning Swahili in 25 minutes...

[@Dante_S550_Turbo]

yeah that shit's fucked. Why can't shit be simple. fuel gets pumped to a fuel regulator and then fed to injectors, return line past injectors the end.

[@mystrodreezy9190]

Swahili is easy as hakuna matata😂😂

[@dannybrennan31]

I tried my best to follow but I think he was thinking out loud for most of the video as a sanity check to make sure even he understood what he was supposed to be doing

[@JerryC25]

Someone sponsor this guy a split unit ac for Christ sake

[@Sir.VicsMasher]

Why, the guys wont even buy a regular box fan for themselves. Automative masochism.

[@wrighty338]

AC? he hasnt even got a workbench yet LOL

[@mrgeraldbrent]

Gonna need more than a minisplit for that space.

[@Moneygrip]

One of those mitsubishi ductless jawns

[@lexus_offroad_adventures]

Don’t you be playing with my heart with the whole 4 rotor C8 corvette thing Rob. Please actually do it.

[@lexus_offroad_adventures]

Irvine860 life isn’t all about making sense all the time

[@samueljackson856]

That sounds dope. 4 rotor means more bald eagles right?

[@lexus_offroad_adventures]

Samuel Jackson German bald eagles

[@jayventransportllc]

Jesus Rob!!!! fixe those wires up!!!!!

[@NathanaelNaused]

Glad to see Rob taking the fuel system seriously and actually building a nice one. Especially after what happened with the 3 rotor

[@gdim007]

i got an idea, hear me out... the plan is, you design a t-shirt themed "floor vise", you sell hundreds of it, and them you use the money to BUY A WORKBENCH!!!!

[@ShaneCarles]

I so much wanna fix those wires and harness them up nicely. My OCD on that fact is.......strong.

[@digigamer7]

I just commented that 😂

[@christopher19691]

@Shane's Adventures Right!!!

[@F90ronny63]

Do mine lol

[@normanguzman417]

By the end of the project, Rob will be a Corvette expert.

[@kevin58506]

Rob Dahm we love you ! All the way from South Africa! Keep spreading the brap brap brap brap love!!!

[@scottjinx]

is there much rotary action over there?

[@kevin58506]

@@scottjinx Unfortunately not in my area! But in the bigger cities yes!

[@Sir.VicsMasher]

All those fancy AN fitting's and no $8 aluminum AN wrench to be seen. Please somebody, buy a set of AN wrenches or the adjustable one for $17.

[@einzelmotorsport6711]

TurboDieselDan its clearly a typical example of a man who pretends to know what he's doing

[@spongetot22]

Einzel Motorsport Yet here you are, watching his video.

[@einzelmotorsport6711]

tot_coz2 I also watch documentaries about the holocaust. Doesn't mean I approve

[@andries4561]

@@einzelmotorsport6711 Don't act all tough, Rob says himself that he's new to it. That he uses their website for every step in the process, he just loves doing it so why you gotta be salty as piss about it

[@einzelmotorsport6711]

Andries so like I said, pretends to know what he's doing.

[@mcoa5772]

Hey rob! Just a word of advice on doing a flex fuel sensor. You want the sensor to be before the fuel rail, not after. Thats so you won't run into a lean condition while ethanol is injected before your ecu can read it. If you can please move the sensor from the return line to the feed line, that'd be awesome!

[@christopher19691]

i want to see a video of you building a workbench LOL!

[@iCadaverx]

I remember buying all of those black anodized fittings for my Camaro when I LS swapped it. Man do those suckers hit the wallet. You need a million of them and they're all $15-60 each. These are the things people don't realize it takes to build a proper car, and not cheap out.

[@robertorivera4752]

One day rob will clean his wiring

[@heartbreakandmotorjive1867]

PTFE is Teflon, or more accurately, Teflon is a name brand of PTFE.

[@pjbth]

This video should be renamed one fuel system described 5 times

[@haydenallen888]

At 11:00 3/8 + 3/8 = 6/8 = 12/16 therefore you have equivalent flow of -12, not -6! That Y into -6 will be a big restriction! Keep up the good work man!

[@twistymcslide2]

6an isnt able to flow for much over 450hp with E85 . it may be too restrictive. better off coming out of the tank also with 8an , and reducing , so down the road you dont have to cut and reweld a fitting when you figure out 6an is limiting .

[@ionstorm66]

It's dual 6an into 8an up to the engine.

[@twistymcslide2]

6an is his planned outlet from tank size. its restrictive, and limited compared to 8an or larger. you can always reduce, you cant always increase ......if he has a demand for 8an down the road. he has to redo the tank fab work... why ....... best to go 8 and not " need " it , than be limited ....right ? and dual 6an to 8an , is a reduction in flow potential . do the math. 2x6an ,compared to 1x8an ..... also a single 6an regulator return . another reduction ......

[@twistymcslide2]

@@ionstorm66 6an is 3/8" . so x2 = 3/4" ... 8an = 1/2". ..

[@ionstorm66]

@@twistymcslide2 if he has more demand he will need larger pumps, which will be most likely external, or a surge tank setup.

[@twistymcslide2]

@@ionstorm66 wrong. with the reductions , sensors , and return . he'll run out of flow because of the lines, not the pumps capabilities. fluids under pressure work differently than you seem to understand .

[@DirtyEars]

I'm glad I watched all the way to the end hahahaha. That was like one step above a dab, Rob. That was great haha

[@jeremywilliams9470]

Crazy wiring. Yep. It’s a Dahm build

[@MK-pi2zt]

The facts that he’s more active and more videos are out make me hyped in fact if I wasn’t poor I’d own a rotary.

[@matthewhall9530]

It’s been right at 90 for most of the day with 100 percent humidity here in Mississippi and I feel the working on stuff in the middle of the night. The only prob for me is everything ends up being closed when you realize you need the tool you returned earlier in the day. Just finished changing the water and power steering pumps on a 07 Cadillac DTS and it would have been a bigger struggle if I tried to do it during the day.

[@matthewhall9530]

Don’t know if you’ve gotten the registration and all that done yet but it probably would have been a good idea to get all that done before irreparably modifying something like a fuel hat.

[@chrispas761]

man the channel is going awesome i cant wait to see all the projects done, but damn i think it would be great if you could throw in some rx8 love. Keep up the amazing content bro!

[@justinhelget853]

drill that nipple on the boost connector on the fuel regulator if you want accurate readings at the FPR, watch pfi speed's video.

[@soraaoixxthebluesky]

You guys are so lucky to have the luxury of having E85 in your country’s pump station.

[@nicoxis]

24:00 put the toilet sit down!, said no one.

[@buiItnotbought]

I love ptfe hoses and fittings. Ran my feed, return, and meth lines with braided stainless ptfe. The an fitting is much easier to assemble than regular an fittings. Haven't had a single leak yet!

[@2lucky2tha7]

Rob, why not run 93 octane with meth injection instead? Rotaries don't like E85 because - like you said - it gums everything up. It causes alot more wear too. It works great in piston engines but not for rotary engines - even though alot of guys use it. Here's a great article that compares and explains why: www.colemanprecisionrotaries.com/tuning--fuel--expanded-e85-coverage.html I've been following your channel for a while now and it's awesome. Just a fellow rotorhead wanting to help 👍

[@Powerhauz]

Ok I gave it a read as I also was thinking of converting to e85. For my application it won't be happening (stock Renesis for SCCA autocross). Rob has stated that he wants to push serious power (700+) with this motor. Based on the article, his best bet is to push all the E85 he can handle. Also what's a rob dahm build without blowing up a rotary and rebuilding it at some point 😆. Thanks for changing my mind. I don't think Rob's will change though.

[@samueljackson856]

All the corns and doritos!!! 🌽🌽🌽🔺️🔺️🔺️🇺🇸🦅

[@koton_bads]

Because E85 is the ultimate racing fuel. Yes it is less energy dense but that is the reason for this. More tuning potential than normal fuel. E85 is also economical. Burns cleaner I mean way more cleaner the gasoline. I think Rob cares about the environment.

[@archeraero4613]

Man I am just blown away by all the knowledge you've got. Thanks for being a learning resource!

[@mattbeazer5896]

The contrast between the nice lines and the Rob Dahm wiring job makes said wiring job look even worse. ;)

[@TheBigChad]

Rob has that “I just woke up at 3pm” hair

[@PolarArctica]

What’s hotter than that custom fuel system? The last few seconds of the video. 😩

[@GrandMessiah]

Making me nervous - throw some shop rags in that LIM before you drop something down there!

[@motoraddiction9190]

actually happened on my rx7 while I was doing the fuel system. I had to connect a hose to a shopvac, shove it in the LIM and was able to retreive the piece... That was stressfull :P

[@wankelbolt]

Holy shit, no kidding! I was sweating the whole video. They invented blue painter's tape just for that purpose! Or was it for painting? Hmmm.

[@69strokefasterthanyourmum]

22:11 this was hilarious😂😂😂👌👍

[@madgaming5242]

Hilarous the end😂, Were gonna hear that c5 brapping keep it up

[@powcar91]

Rob sure loves his hoses .

[@williamstanfield1216]

Abel was a very good influence.Amateur hour is over.

[@fernanaquino2482]

Wow back to back videos

[@NM2011CTSV]

Rob let’s have a few shows where you clean up the wires on the vette and the 3 rotor..

[@normanguzman417]

Rob get a fire extinguisher for the Corvette just as a safety precaution. Too many connectors. I have seen on the race track too many cars burning and sometimes it will take two extinguishers to stop a fire.

[@ChutneyInc.]

Its much more fun hearing someone else drop stuff while taking of the 13b uim lol. Its no worries. Ull find whatever but it hurts so bad lol

[@gombie72]

Hi Rob

[@graymatter78-23]

Nice plane sounds

[@ts.exotics4583]

Lol it was 102 degrees last week in the UK

[@nickallain]

This might be the best AN explanation I've ever seen.

[@thefunbuns1]

Bob's back!

[@gixxernut8021]

Has twelve cars $$ has all the tools $$ no air priceless roflmao

[@paulsoames7980]

In England I have no idea if they sell e85 anywhere but we do have 99 octane from the pump

[@twizzler123969]

3 episides of rob bragging about his reusable AN fittings. Its like a dream(nightmare) come true.

[@freedomfox8183]

I love your builds and your content but please tell me Abel is doing the wiring on the four rotor or someone as capable to make things look as good as the rest of the car...

[@marcus032390]

I warped the shit out of my fuel hat welding bungs on it..... Hope that doesn’t happen with yours.

[@dustincoyle7852]

What brand hose did you go with? I bought some that I though would be flexible and was sad to find out, it was not very flexible.

[@mattc7311]

Rob needs to make a rolling work bench for that vice!

[@deatherageperformance8367]

Give you heads up you're going to have way more restriction in your fuel system using those y fittings by the engine then you would if you just ran one fuel line into your bottom fuel rail which the car runs off of 90% of the time and then run it into your secondary fuel rail then into your fuel pressure regulator before it returns that's the best way to do it the Y's just cause more restriction only benefit out of them you'll have a bit more volume in the system but it will cause a lot of restriction

[@ionstorm66]

The rails are only 6an, so running a 8an into them isn't going to give it any more flow.

[@deatherageperformance8367]

@@ionstorm66 the only reason why you upgrade your fuel rails and lines is cuz you need more volume not pressure the way he's doing it he's going to have the proper volume from the pumps but the Y fittings are going to cause a restriction which is going to defeat the purpose of setting it up for more flow not pressure

[@deatherageperformance8367]

@@ionstorm66 1 cheap and easy way if you need more fuel volume put an aftermarket fuel filter before the fuel pressure regulator and that will have the volume in the whole system

[@boqueefya3623]

Love you Rob

[@mvanleeuwen8813]

Awesome video i learned alot from this. Thanks rob and jarret

[@texasflysuperstar]

Great vid Rob

[@maxthedog8483]

try using a fuel accumulator on the fuel rail.

[@edgardoarroyo7418]

I just bought a 93 FD tuned with E85, what premix should I use and what amount?

[@dakavanagh]

I was nervous about those open intake runners!

[@asdf12347109]

sleep deprived 1:30AM hand gestures are definitely wilder and more manic

[@HODRX7]

I'd be a little worried about powering the transfer turbine pump with unregulated pressure (Yikes). Use the return line instead. It will be pressure regulated and you won't have the loss of volume on the supply side.

[@bignick6905]

Rob, why the fuel pressure regulator on the return side of the rails? Why wouldn’t they be between the pump and the rails? Thanks man

[@cortniesmith3138]

Rob please please for the love of god please sort some work benches and lifts out I can’t bare watching you do stuff that would be 100% easier if you just had a work area

[@waderyun.war00034]

Isn't the fuel pump that you are using to send fuel to the other tank going to loose pressure. I might be wrong but couldn't you turn the mechanical pump that transfers fuel between tanks off of a return line eliminating any possible pressure drop on the pump you connected to the mechanical pump.

[@DrinkinDaJuice]

Can I just say that rotaries DO NOT LOVE E85. I tell you this, Rob, because we have had all sorts of dramas with running E85 on two separate 13B-REWs both of which failed and lost compression because the E85 DOES NOT MIX with MINERAL OIL. It coagulates and forms serious sludge in the combustion chambers and rotor housing which gums up the apex seals in the rotor tip grooves and the engines lose compression and fail to start initially and then fail to start completely. You would know that the 13B injects it's own engine oil (or premix from a separate tank or premix in the fuel tank) into the combustion housing. This is mineral oil. Or it should be, according to Mazda. You add E85 into that, by way of the fuel injectors, and you are creating a recipe for sludge. Try mixing E85 and mineral oil in a cup and watch what happens. DO NOT DO WHAT ROB IS DOING HERE. $$$$ Engine rebuild will follow. E85 and rotaries don't mix.

[@smokepeddler]

Two stroke engines love e85 as well

[@jeanmitchell1648]

Nice Logan cut 😘

[@Twilzeth]

Sorry, but E85/ethanol does not ''gum up'' stuff or corrode anything whatsoever. I don't understand how so many people have become misinformed about this. It will not harm any kind of rubber compounds or metals in your vehicle. The only thing it does is ruin a paper fuel filter and attract tiny amounts of water which is not a problem unless you let the fuel sit on top of metals for months at a time. I've been using E85 on a '99 carbureted motorcycle for 4 years now and nothing has been changed from original except a fuel filter and jets + a tune. No corrosion, no damage to 20 year old rubber hoses and carb parts no nothing.

[@sofakingdom3076]

Sounds great. =]

[@208Concepts]

I've been doing the same in my 90 Ranger with just a tune and larger injectors. I should use a filter that's not cellulose, but I haven't got to that yet.

[@lcbrme138]

I'm enjoying the long episodes!!!

[@ShaneCarles]

It would be kinda nice to have a line pressure tester to test lines for leaks before they are installed.

[@MatsuYoda]

Can't wait until you finish the 13b C8!

[@julianbascle8481]

*26b c8 😉

[@jkbaker01]

1) weather is beautiful in Michigan 2) bring the Vette to dream cruise and come by the GM headquarters downtown to show it off :)

[@BBCMONTE34]

So if the goal is to make more power than the stock v8 can you compare pricing to see how much it costs to do so? Seems like if that money was spent on an ls you’d make more power per dollar

[@TheMadMike90]

u didnt remeber to say that u need to put that ethanol content sensor in the return line.

[@justinranes3351]

When Rob says “complexity” and I’m sitting here like “shit, that’s a clean, very simple setup”

[@halofreak1990]

It's pretty complex when compared to what Cleetus runs on Ruby at similar boost levels.

[@joshuajanuary3847]

rob itd be pretty sweet if you got rotary shaped exhaust tips for the corvette

[@ollemauleonwolter848]

Can someone tell me how many times he said aluminum in this video lmao

[@pushthepro]

Ah the wonderful measurements of 'Murica. Because it makes 5/728% sense to say Oh this line is AN10, so you have to divide it by 16 to get that it's 5/8th of an inch meaning the outer diameter will be 26/8213 squared inch cubic miles.

[@208Concepts]

Thank the military for the AN designation 😆

[@SourBogBubble]

PTFE IS what I use for Butane etc.

[@coryhalvorson8874]

Don't weld the bulkheads to the fuel tank top plate. Use 1 nylon sealing washer per fitting, that's all you need. Don't make it harder than it needs to be

[@joealex65]

Daddy Rob, you promissed us to let Papi Hert drift the damn Rotaryvette, i'm still wating for that! 😢 I want to see Hert abuse it and if it survives, it can survive anything! 😁😁

[@gabrielmansano]

He said Hert would drift the vette when it's finished and making good power

[@mendiboyy]

Rob Dahmn u are a master as messing up .

[@ryanmetevier9141]

That shit at the end had me rolling

[@markcameron5694]

Is there a low profile intake manifold for the rotary? Would like to know.

[@bigmrc71]

Get a workbench already

[@AudioHead809]

The ending killed me 😂

[@TonyHerson]

10:54 3/8*2 doesn't equal 6/16. 6/16 is the same as 3/8. 3/8*2 equals 6/8 or 3/4

[@Forcefed2002]

6an is 3/8

[@TonyHerson]

@@Forcefed2002 in the video he says 3/8*2 is 6/16 which is incorrect

[@danieltherallyfan2777]

Can you finish the 4 rotor before sema???

[@Wormweed]

Someone should count how many times Rob and Tavarish says an line in their videos.

[@k20aef8]

Looking good as always cant wait for the rest. Just don't disappear again.. lol

[@emorider6804]

so after you install flex fuel sensor ?you can use ethanol in your rx7?

[@jacobbarker1945]

Rob u look like ya tryna start a wolverine look lol

[@joewilder]

It would be interesting to know what the weight distribution of the car is. It looks almost mid-engine.

[@tylerc7336]

U should get some zip ties or something for that spaghetti or wires u have under the intake n your lucky u didn't lean the engine out with a air leak from the gasket missing

[@OxygenGenetics]

Personally I'd keep the flex fuel BEFORE the rail on the feed side. Seems nominal but if your E content varies from before and after the rails, it could be another potential pain in the ass you could avoid. Just the .02 from a fellow Michigander cant wait to hear all of these rotaries brapping at the same time!

[@senditmatt3364]

AEM calls for it on the return side. Iv done a bunch of flex fuel installs with no issues this way

[@OxygenGenetics]

@@senditmatt3364 I've got to be remembering hearing something backwards then about having it the other way. Good to know, now itll drive me nuts until I figure out what video I heard that from lmfao.

[@motoray69]

Need to make sure ur new return line is below the fuel level so you dont aerate the fuel.