Boost and 11:1+CR
TECH Addict
Joined: Dec 2004
Posts: 2,173
Likes: 619
From: Florida
if youre going to open up the quench, consider sending the heads out to have the chambers softened.
i have a 12.5:1 bbc built for nitrous and switching to boost and thats my plan... thicker head gaskets and softened chambers. and e85.
and omg 11.8 afr at 1psi lol
i have a 12.5:1 bbc built for nitrous and switching to boost and thats my plan... thicker head gaskets and softened chambers. and e85.
and omg 11.8 afr at 1psi lol
what did you do, copy and paste your same post to two different threads?
he didn’t say. And I assumed the op was referring to using pump fuel when he was asking his original question. So to keep someone from breaking their motor, thinking they can get away with that lean of a mixture….so I felt it my duty to warn anyone. My guess is it was a typo or misunderstanding from the poster and tuner. No damn way I’d ever run an engine that lean on boost.
and I’d much rather be safe and leave a little power on the table than be right on the edge and leave engine parts on the street!
And I agree...too rich will hurt the spooling of the turbo....but not a supercharger......unless a d1x is some sort of turbo I didnt know of
and I’d much rather be safe and leave a little power on the table than be right on the edge and leave engine parts on the street!
And I agree...too rich will hurt the spooling of the turbo....but not a supercharger......unless a d1x is some sort of turbo I didnt know of
True but the impact of IAT is also heavily fuel dependent, E85, M1 etc aren't nearly as sensitive to higher IAT's as pump gas.
TECH Addict
Joined: Dec 2004
Posts: 2,173
Likes: 619
From: Florida
I'd need to check my tune again, but I know I'm running 18* of timing at 11 psi and I believe my AFR is around 12-12.5:1 I have knock sensors enabled in my tune with Terminator X and it had no signs of knock. My tuner said that if I wanted I could bump the timing up a few more degrees. But I was only shooting for 600 whp and we had already hit 633, so I just kept it there where it was happy. I should also mention that I gapped my rings per Mahle's instructions for a supercharged car. .024/.026 top and bottom. I've been reading a lot about what fails on the LS cars when boosted and the common thread seems to be ring lands.
OP if you aren't properly gapped, I would suggest addressing it now before something breaks.
OP if you aren't properly gapped, I would suggest addressing it now before something breaks.
Since you are super safe guy, I will let you know that if you ever run pure meth in the WW tank instead of 50/50, it will eat the pump seals and spill it all in your parking spot. To be specific, I mean it will eat the WW pump at the bottom of the tank, not your meth injection pump. I originally used the WW fluid reservoir on my 2004, but found all my meth on the garage floor in short time.
Since you are super safe guy, I will let you know that if you ever run pure meth in the WW tank instead of 50/50, it will eat the pump seals and spill it all in your parking spot. To be specific, I mean it will eat the WW pump at the bottom of the tank, not your meth injection pump. I originally used the WW fluid reservoir on my 2004, but found all my meth on the garage floor in short time.
damn. Didn’t know that, thanks for the heads up! I’ve been good with washer fluid and two bottles of heet so far.