L28et hits 600hp *no nitrous*
05-15-2007, 08:43 AM
#1
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Thread Starter
Join Date: Mar 2003
Location: WA
Posts: 373
L28et hits 600hp *no nitrous*
Turbo is a GT4294R
http://www.youtube.com/watch?v=jOG9CXz2gsQ
"this was done at
~85degF ambient,
25psi boost
94 octane sunoco gas
no nitrous
no water or meth injection
it's a stroked L28 with an N42 head"
Discuss
http://www.youtube.com/watch?v=jOG9CXz2gsQ
"this was done at
~85degF ambient,
25psi boost
94 octane sunoco gas
no nitrous
no water or meth injection
it's a stroked L28 with an N42 head"
Discuss
05-15-2007, 07:43 PM
#12
Pro Pumpkin Carver
Join Date: May 2004
Location: Oakland Cali-****en-fornia
Posts: 2,160
Originally Posted by ASA240z
very nice !
What was that "bang" during half way of the vid, back firing?
What was that "bang" during half way of the vid, back firing?
05-15-2007, 08:11 PM
#14
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Join Date: Sep 2005
Location: lemont, Illinois
Posts: 9,532
thats just teh sound of a high powered engine, im used to it lol, its just what rich engines on high boost do when you let off, its still running like your at WOT at 20+ psi and you let go and it dumps the **** it the BOV goes no more air PSI there and on teh next stroke it blows that **** up cause there was too much gas in there. any who, i knew it wasnt older than me, look close, REALLY CLOSE, only the valve cover is done, not teh block, the olderthanme guy did teh WHOLE engine.
05-16-2007, 10:04 AM
#22
Euro Z King
Join Date: Mar 2006
Location: Utrecht The Netherlands where owning a car is a CRIME!!
Posts: 387
Originally Posted by snwbrderphat540
thats just teh sound of a high powered engine, im used to it lol, its just what rich engines on high boost do when you let off, its still running like your at WOT at 20+ psi and you let go and it dumps the **** it the BOV goes no more air PSI there and on teh next stroke it blows that **** up cause there was too much gas in there. any who, i knew it wasnt older than me, look close, REALLY CLOSE, only the valve cover is done, not the block, the olderthanme guy did the WHOLE engine.
Smoking like it was means something like a ~9 AFR. I don't know how the dyno showed 11 smoking like that
It looks like he's running gasoline as anti-detonant..
haha and i have ITBS aswel they rock (read faster pick up )
LOL !!!
Last edited by frank280zx; 05-16-2007 at 10:08 AM.
05-16-2007, 11:20 AM
#23
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Thread Starter
Join Date: Mar 2003
Location: WA
Posts: 373
Here are some of the details given at hybridz.
"For the first several runs, I was running way richer than I had been when I street tuned - the culprit was later found to be that the manifold air temps were considerably higher on boost than what I was seeing in the real world - like peak temperatures of 132 degF vs. 94degF on the street. This was not being compensated for. My initial target for AFR was 10.5:1 and the car was in fact running down in the 9's for the first several runs. If you do the math this makes sense given the temperature difference. The first run netted "only" ~501rwhp.
The reason for the rich target mixture was because of the high exhaust temps that I was seeing with leaner mixtures, as was discussed not long ago in this forum."
He ended up around 11.5:1 for the last two runs. The explosion was the due to hitting the rev limiter. Unburned fuel igniting in the exhaust. I get that sometimes on upshifts. Scares the hell out of me.
"For the first several runs, I was running way richer than I had been when I street tuned - the culprit was later found to be that the manifold air temps were considerably higher on boost than what I was seeing in the real world - like peak temperatures of 132 degF vs. 94degF on the street. This was not being compensated for. My initial target for AFR was 10.5:1 and the car was in fact running down in the 9's for the first several runs. If you do the math this makes sense given the temperature difference. The first run netted "only" ~501rwhp.
The reason for the rich target mixture was because of the high exhaust temps that I was seeing with leaner mixtures, as was discussed not long ago in this forum."
He ended up around 11.5:1 for the last two runs. The explosion was the due to hitting the rev limiter. Unburned fuel igniting in the exhaust. I get that sometimes on upshifts. Scares the hell out of me.
05-17-2007, 12:52 AM
#25
Euro Z King
Join Date: Mar 2006
Location: Utrecht The Netherlands where owning a car is a CRIME!!
Posts: 387
Originally Posted by snwbrderphat540
that was my second post rev/fuel cut, and i never said squat about an AFM it was just another option. so there fore IM RRIGHT!!!!!!!!
