Direct Exhaust Injection!

Jim Wahl · 11-14-2007, 06:46 PM

Could this be the way of the future? I never knew my turbo was so inefficient! This was a serious post at http://www.gmmodernmuscle.com/forums...er=asc&start=0

You can go there to see his drawing of his DEI invention and the 8 pages of hilarious reactions and remarks. Jim

Message
The Nemesis_ZR2

Joined: 05 Oct 2007
Posts: 66
Location: Cutting Jay's BREAK LINES!
Posted: Wed Nov 07, 2007 2:50 pm Post subject: Turbo Questions

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Ok. I didn't want to mention it but I was thinking about turbo charging my Vette. I got to thinking about it and how in efficient even turbos are (compressor efficiencies of about 80% at best).

Since a turbo's function is to pressurize incoming air and force it into the upper motor, and turbos are driven by high pressure exhaust gas created from the combustion process, couldn't I just bypass the turbo altogether and route my headers back into the throttle bodies?

Since I have CFI, I could balance the DEI (direct exhaust injection as I just coined it) by feeding one header into each throttle body. Yes, the charge air wouldn’t be that cold, but it would be under a hell of a lot more pressure.

There are still a few things I need to work out:
1) How do I get the CFI aircleaner to fit in a way that hides this plumbing?
2) Does anyone make a V-band clamp that will bolt an exhaust header to a CFI throttle body?
3) What pinion angle should I use in my rear-end? I’m sure there will be a noticeable difference in torque output.

What do you guys think?
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1 of 2,430 Gold Metallic coupes built...... #00521--15.2-- 1/4 mile run

11-14-2007, 06:46 PM	#1
Jim Wahl Veteran Member Join Date: Jan 2002 Location: Central Florida Posts: 5,844 Likes: 666 Liked 683 Times in 129 Posts	Direct Exhaust Injection! Could this be the way of the future? I never knew my turbo was so inefficient! This was a serious post at http://www.gmmodernmuscle.com/forums...er=asc&start=0 You can go there to see his drawing of his DEI invention and the 8 pages of hilarious reactions and remarks. Jim Message The Nemesis_ZR2 Joined: 05 Oct 2007 Posts: 66 Location: Cutting Jay's BREAK LINES! Posted: Wed Nov 07, 2007 2:50 pm Post subject: Turbo Questions -------------------------------------------------------------------------------- . Ok. I didn't want to mention it but I was thinking about turbo charging my Vette. I got to thinking about it and how in efficient even turbos are (compressor efficiencies of about 80% at best). Since a turbo's function is to pressurize incoming air and force it into the upper motor, and turbos are driven by high pressure exhaust gas created from the combustion process, couldn't I just bypass the turbo altogether and route my headers back into the throttle bodies? Since I have CFI, I could balance the DEI (direct exhaust injection as I just coined it) by feeding one header into each throttle body. Yes, the charge air wouldn’t be that cold, but it would be under a hell of a lot more pressure. There are still a few things I need to work out: 1) How do I get the CFI aircleaner to fit in a way that hides this plumbing? 2) Does anyone make a V-band clamp that will bolt an exhaust header to a CFI throttle body? 3) What pinion angle should I use in my rear-end? I’m sure there will be a noticeable difference in torque output. What do you guys think? _________________ 1 of 2,430 Gold Metallic coupes built...... #00521--15.2-- 1/4 mile run __________________ Jim Wahl....NHRA #2239 S/SS - IHRA # 8 Stock, D2 Stock Champion (forever I guess) 2019 Baby Gators Stock Champion 2009 NHRA D2 National Open Stock Champion 1982 NHRA D2 West Palm Beach LDRS SS Runner Up Past President, Southern Stock / Super Stock Association. Last edited by Jim Wahl; 11-14-2007 at 06:55 PM.