Injecting fuel pre turbo? - Competition Diesel.Com

dieselstudent11 · 08-08-2012, 10:30 PM

I was thinking, would injecting diesel pre turbo cause the air to mix with the fuel before it reached the cylinders? Maybe the turbulence of the compressor wheel would blend it together? Just a thought, and was interested if its been tried before / opinions.

Not suggesting using this as the primary source of fuel injection, but as a power boost like injecting nitrous etc...

I imagine it could just completely not work and coat your turbo housing in diesel.

*JQmile* · 08-08-2012, 10:50 PM

A few people have tried it. Usually good to have a video camera, blows up pretty good! It would be interesting to do on a super-dropped compression engine. Might work better one of those.

Fireman450 · 08-08-2012, 10:53 PM

Meh... doubtful....

dieselstudent11 · 08-08-2012, 10:58 PM

JQ, does it blow up before making it to the engine or does it blow up from the added power?
something tells me its the first one

edit: I suppose having fuel in the engine mid compression stroke could explode as well.

*JQmile* · 08-09-2012, 12:01 AM

It pre-ignites like in a gas engine with too much timing. In this case, the fuel will ignite after only 410 deg, which, with a turbo pushing 150 deg into the engine, is a little too early on the stroke. That rattle you hear in diesels gets real bad.....even methanol can be used in an autoignition capacity with enough compression (around 19:1).

*JQmile* · 08-09-2012, 12:06 AM

You could calculate when the fuel would ignite based upon the compression ratio, piston speed, pressure, volume, etc, but it's too much math for me to want to do at this hour. I'd try it on a cheap diesel at high rpm maybe.

AHall · 08-09-2012, 01:24 AM

I read somewhere years ago the 6.0 guys used a small system/wet n20 to hold the highest hp/et stock injector record.

dieselstudent11 · 08-09-2012, 01:25 AM

That makes complete sense thanks for the info.

Samaras Diesel · 08-09-2012, 06:48 PM

We run a draw threw setup on our pulling tractor that works very very well. its composed of a stock hx35, a 90' elbow and a homemade flange welded to it with a 750 holley carb ontop. we run 30psi of boost with it. anybody intreseted enough for me to post pics?

bluehotfarm · 08-09-2012, 07:17 PM

yes post them up!

apocalypse1812 · 08-09-2012, 07:36 PM

What about injecting gasoline post cylinder head/pre turbo, in the exhaust tract to help spool?

That might work.

Lostnwalmart · 08-09-2012, 07:42 PM

Why would you inject an unmeasured amount of fuel into an engine that is throttled by fuel??

dieselstudent11 · 08-09-2012, 07:57 PM

Samaras please post some pics!
You could certainly measure how much your injecting but that really wouldnt matter seeing how this idea would probably cause detonation as JQ said but I am interested in this draw thru carb wizardry.

apocalypse1812 · 08-09-2012, 09:05 PM

Quote:

Originally Posted by Lostnwalmart

Why would you inject an unmeasured amount of fuel into an engine that is throttled by fuel??

Um, crazy power... Hello?

roachie · 08-09-2012, 09:10 PM

That just spells destruction.

Schrowang · 08-09-2012, 09:11 PM

Nahh your just using fuel to cool the turbo.

Posted to CumminsForum via autoguide for iphone.

YOUNG GUNS15 · 08-10-2012, 12:14 AM

Quote:

Originally Posted by roachie

That just spells destruction.

Someone PLEASE video it.... Can you say run away!?

My grandpas old 50's d7 cable dozer has an aftermarket turbo and an oil bath air cleaner, one day we put to much oil/ diesel mix in it and that sucker ran away for a good 3 minutes. Finnally settled back down, amazing it still runs

straight 6 roar · 08-10-2012, 01:23 AM

Quote:

Originally Posted by apocalypse1812

What about injecting gasoline post cylinder head/pre turbo, in the exhaust tract to help spool?

That might work.

See too many Hornets hit the burner cans in your day?

On a side note that would be incredible to see what happens.

Injecting fuel pre-intake is ridiculous, it will definitely pre-detonate far far from TDC and hammer your engine to pieces.

apocalypse1812 · 08-10-2012, 05:29 AM

Quote:

Originally Posted by straight 6 roar

See too many Hornets hit the burner cans in your day?

Exactly

RonA · 08-10-2012, 09:21 AM

These guys are all pulling your chain. It works great. Gasoline is best. Take video.

08-08-2012, 10:30 PM	#1
dieselstudent11 Name: dieselstudent11 Title: Rookie Status: Not Here Join Date: Mar 2012 Member`s Gallery Posts: 24	Injecting fuel pre turbo? I was thinking, would injecting diesel pre turbo cause the air to mix with the fuel before it reached the cylinders? Maybe the turbulence of the compressor wheel would blend it together? Just a thought, and was interested if its been tried before / opinions. Not suggesting using this as the primary source of fuel injection, but as a power boost like injecting nitrous etc... I imagine it could just completely not work and coat your turbo housing in diesel.

08-08-2012, 10:50 PM	#2
JQmile Name: JQmile Title: Comp Diesel Sponsor Status: Not Here Join Date: Nov 2006 Member`s Gallery Posts: 6,976	A few people have tried it. Usually good to have a video camera, blows up pretty good! It would be interesting to do on a super-dropped compression engine. Might work better one of those. __________________ 89 Dodge 972rwhp on the hose, still a VE!

08-08-2012, 10:53 PM	#3
Fireman450 Name: Fireman450 Title: Daring to be diffrent!! Status: Not Here Join Date: Nov 2007 Location: Edmonton , KY Member`s Gallery Posts: 1,606	Meh... doubtful.... __________________ Lynn Chapman Driver: 04.5 CR Play Toy:1994 Dodge 12V, SMOKE SHOWIN! 2WD Pulling Team. vs. 3.0 in progress. Thanks to Northeast Diesel, MUMAU DIESEL , PullTech Chassis & Fab, Cooper High Performance, SKPP, Joe Gibbs Racing/Driven Racing Oils and all my friends and family!

08-08-2012, 10:58 PM	#4
dieselstudent11 Name: dieselstudent11 Title: Rookie Status: Not Here Join Date: Mar 2012 Member`s Gallery Posts: 24	JQ, does it blow up before making it to the engine or does it blow up from the added power? something tells me its the first one edit: I suppose having fuel in the engine mid compression stroke could explode as well. Last edited by dieselstudent11; 08-08-2012 at 11:00 PM.

08-09-2012, 12:01 AM	#5
JQmile Name: JQmile Title: Comp Diesel Sponsor Status: Not Here Join Date: Nov 2006 Member`s Gallery Posts: 6,976	It pre-ignites like in a gas engine with too much timing. In this case, the fuel will ignite after only 410 deg, which, with a turbo pushing 150 deg into the engine, is a little too early on the stroke. That rattle you hear in diesels gets real bad.....even methanol can be used in an autoignition capacity with enough compression (around 19:1). __________________ 89 Dodge 972rwhp on the hose, still a VE!

08-09-2012, 12:06 AM	#6
JQmile Name: JQmile Title: Comp Diesel Sponsor Status: Not Here Join Date: Nov 2006 Member`s Gallery Posts: 6,976	You could calculate when the fuel would ignite based upon the compression ratio, piston speed, pressure, volume, etc, but it's too much math for me to want to do at this hour. I'd try it on a cheap diesel at high rpm maybe. __________________ 89 Dodge 972rwhp on the hose, still a VE!

08-09-2012, 01:24 AM	#7
AHall Name: AHall Title: Hobbyist Status: Not Here Join Date: Apr 2007 Location: Western Slope, CO Member`s Gallery Posts: 4,603	I read somewhere years ago the 6.0 guys used a small system/wet n20 to hold the highest hp/et stock injector record. __________________ -Adam Prostreet F-100 Build Thread http://www.competitiondiesel.com/for...112541&page=24

08-09-2012, 01:25 AM	#8
dieselstudent11 Name: dieselstudent11 Title: Rookie Status: Not Here Join Date: Mar 2012 Member`s Gallery Posts: 24	That makes complete sense thanks for the info.

08-09-2012, 06:48 PM	#9
Samaras Diesel Name: Samaras Diesel Title: Billet steel Status: Not Here Join Date: Jan 2012 Location: Glasgow, KY Member`s Gallery Posts: 682	We run a draw threw setup on our pulling tractor that works very very well. its composed of a stock hx35, a 90' elbow and a homemade flange welded to it with a 750 holley carb ontop. we run 30psi of boost with it. anybody intreseted enough for me to post pics? __________________ 00' Dodge ext. cab 4x4 nv4500 Kentucky clutch 3800# pressure plate 60mm HX35 autometer guages Edge juice with attitude hot unlocked with 6x.013 injectors AirDog raptor 150 w/ remote mount fuel filters

08-09-2012, 07:17 PM	#10
bluehotfarm Name: bluehotfarm Title: Green Behind the Ears Status: Not Here Join Date: Apr 2012 Location: wisconsin Member`s Gallery Posts: 61	yes post them up!

08-09-2012, 07:36 PM	#11
apocalypse1812 Name: apocalypse1812 Title: Nailed It! Status: Not Here Join Date: Nov 2006 Location: Odessa, Tx Member`s Gallery Posts: 6,180	What about injecting gasoline post cylinder head/pre turbo, in the exhaust tract to help spool? That might work.

08-09-2012, 07:57 PM	#13
dieselstudent11 Name: dieselstudent11 Title: Rookie Status: Not Here Join Date: Mar 2012 Member`s Gallery Posts: 24	Samaras please post some pics! You could certainly measure how much your injecting but that really wouldnt matter seeing how this idea would probably cause detonation as JQ said but I am interested in this draw thru carb wizardry.

08-09-2012, 09:10 PM	#15
roachie Name: roachie Title: Taco Master Status: Not Here Join Date: Nov 2007 Location: East TN Member`s Gallery Posts: 11,133	That just spells destruction. __________________ 99 F250____sold (to a ninja) 01 F250____Mexican F150 04 F350____Fat boy

08-09-2012, 09:11 PM	#16
Schrowang Name: Schrowang Title: Schroowwwaaaannnnnggggggg Status: Not Here Join Date: May 2011 Location: China, illinois Member`s Gallery Posts: 5,897	Nahh your just using fuel to cool the turbo. Posted to CumminsForum via autoguide for iphone. __________________ BRAD 16 F350 platinum

08-10-2012, 09:21 AM	#20
RonA Name: RonA Title: Too Much Time Status: Not Here Join Date: Feb 2008 Location: Liberal ground zero. Member`s Gallery Posts: 11,058	These guys are all pulling your chain. It works great. Gasoline is best. Take video. __________________ 55 years of work and all I got was a T-shirt.