Sorry to hear about this bro... 
What compression should the cylinders be in a low compression FI motor?
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Joined: Jul 2005
Posts: 2,153
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Originally Posted by 2000 Tran Zam
And yes I know the 80% rule, but this 110% DC from what i understand was only for a split second here and there when the car was dynoed.
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Joined: Jul 2002
Posts: 1,218
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From: MI
Originally Posted by 2000 Tran Zam
And yes I know the 80% rule, but this 110% DC from what i understand was only for a split second here and there when the car was dynoed.
Running on the dyno is like running the 4 yard dash. Yes, four....
I would cringe to see where those injectors were cycling at in a 3-4-5 gear pull in that video posted a few weeks ago.
I like to see additional knock protection added for hi-boost/pump gas, like the J&S Safeguard or another intelligent knock controller.
Oh well, like they say:
"Good judgement comes from experience."
"Experience comes from bad judgement."
I hope it's repairable for ya.
Jim
Oh well, like they say:
"Good judgement comes from experience."
"Experience comes from bad judgement."
I hope it's repairable for ya.
Jim
Originally Posted by DeltaT
I like to see additional knock protection added for hi-boost/pump gas, like the J&S Safeguard or another intelligent knock controller.
Oh well, like they say:
"Good judgement comes from experience."
"Experience comes from bad judgement."
I hope it's repairable for ya.
Jim
Oh well, like they say:
"Good judgement comes from experience."
"Experience comes from bad judgement."
I hope it's repairable for ya.
Jim
2000, what's your name by the way? I'm guessing you are in your early 20's? You have a pretty amazing build there and I'm sure it's been a blast to drive the car. Good luck, and I hope that it's nothing major though smashed plug tips is a bad sign that something is going on.
Originally Posted by 2000 Tran Zam
And yes I know the 80% rule, but this 110% DC from what i understand was only for a split second here and there when the car was dynoed.
A split second is all it takes.....
hope it works out for ya....
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Im sure that if anything at least that one piston is fucked up, so I'll need to replace at least that.
I think compression should have been fine... 8.5 isnt a **** ton, I guess the extra boost must have just leaned it out.
Would it be worth me dropping to 8.3 or 8.0 or something?
I think compression should have been fine... 8.5 isnt a **** ton, I guess the extra boost must have just leaned it out.
Would it be worth me dropping to 8.3 or 8.0 or something?
TECH Enthusiast
Joined: Mar 2004
Posts: 604
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From: Loganville, GA
I'd focus on fuel and a pound or two less boost (after you're running again, you can revisit a dyno WITH A WIDEBAND and know you're safe). ~8.5 should be fine.. 8.1 would help out, but it's not really worth pitching forth the money since new fuel goodies will do the trick to fix it..
That's just my opinion.
That's just my opinion.
Originally Posted by ddnspider
i have a generalized question.how much do most shops charge for a rebuild on something like that.like if you had 1 screwed up piston or needed new rings or something?
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Originally Posted by ddnspider
i have a generalized question.how much do most shops charge for a rebuild on something like that.like if you had 1 screwed up piston or needed new rings or something?
Originally Posted by engineermike
I've replaced single pistons in my car before. I don't even pull the engine. $200 and one day's work and I'm back in business!
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Originally Posted by ddnspider
WTF?can you give me a breakdown on how you do that?i didnt realize that was possible,time effective
- Remove intake manifold
- Remove valve cover and valvetrain on offending side
- Remove exhaust header on offending side
- Remove cylinder head on offending side
- Remove driver's side motor mount bolt
- Lift engine as high as you can (maybe 3" on driver's side)
- Remove oil pan
- Remove rod bolts and rod cap
- Remove offending piston
- Replace piston
- Assemble in reverse order
That's it!
Mike
