Need help maxing out the stock turbo.. thoughts?
You are definately lean and most likely pulling timing, hope you have fuel pump and cold plugs in there as your likely to chip a piston like that. You need to log your timing. 12.0 on c16 may be ok, but on pump gas, you're nuts.
his dyno graph looks like mine now, the a/f part.
https://www.evolutionm.net/forums/sh...d.php?t=135775
https://www.evolutionm.net/forums/sh...d.php?t=135775
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From: Danville/Blackhawk, California
Originally Posted by dsm95hybrid
You are definately lean and most likely pulling timing, hope you have fuel pump and cold plugs in there as your likely to chip a piston like that. You need to log your timing. 12.0 on c16 may be ok, but on pump gas, you're nuts.
Originally Posted by shiv@vishnu
Originally Posted by dsm95hybrid
Surprisingly a sarcastic emoticon from the land of 91oct **** fuel. I have seen 3 evo motors chip pistons. I have seen none hole a piston, they detonate and chip chunks of the piston off and disintegrate in the cylinder. One running a stock turbo and two on a GT35R.
Originally Posted by jj_008
He is running a HF cat and TT probably uses a tail pipe sniffer. That, most likely, is the reason the graph is showing 12:1 AFR.
Originally Posted by dsm95hybrid
Now that sounds like a logical response. I don't see much benefit in running a wideband at all if that is the case. Unless there is some rule of thumb for a HFC a/f offset.
Originally Posted by plokivos
so, if you're running no cat, your AFR would show up leaner than it is with the tail pipe snifer?
what the...
what the...
Originally Posted by jj_008
If you are running a cat, w/ a tail sniffer, your A/F will look leaner then they actually are. If you are running no cat then you're getting a good/accurate A/F reading.
I don't recall TT using a tailpipe sniffer - at least, not the long pole kind that goes into your exhaust, anyway. Unless there's another type of tailpipe sniffer?
Isn't the EvoIX supposed to have a new compressor? Maybe that could help boost hp another 10 or so. And that would surely be a cheaper alternative to having head work and/or porting on the stock block.
Isn't the EvoIX supposed to have a new compressor? Maybe that could help boost hp another 10 or so. And that would surely be a cheaper alternative to having head work and/or porting on the stock block.
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Joined: Jan 2005
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From: Spfld, MO
Originally Posted by zstryder
I have a Greddy TypeS, with the one spring mod. I'm running the boost that XFlash runs, which I believe is 23-24psi tapering down to 19 or so?
I think I should be ok AFR, a lot of the DSM guys have been running 12:1 AFR's for awhile.
How exactly does the alky injection work? Isn't it throttle based? If I did get alky, then I'd probably want an ECM with a switchable map, one with, one without the alky. How $$ is it to refill the alky anyway?
I think I should be ok AFR, a lot of the DSM guys have been running 12:1 AFR's for awhile.
How exactly does the alky injection work? Isn't it throttle based? If I did get alky, then I'd probably want an ECM with a switchable map, one with, one without the alky. How $$ is it to refill the alky anyway?
What type of WB did you dyno your car with. If it is the sniffer type then it will show up leaner since you have a cat on your car.
Can't say I know what WBO2 they use at TT. Does anyone else know for sure?
Actually, what is the difference between alcohol/water injection? I was under the impression water injection is used only to cool the intake charge - is alcohol injection actually used as a fuel additive?
Actually, what is the difference between alcohol/water injection? I was under the impression water injection is used only to cool the intake charge - is alcohol injection actually used as a fuel additive?