5StarSuzuki

Who should be worried about this problem. What if we simply have an exhaust which increases boost pressure minimally? Kinda scary... Ill pay the 500 for precaution probably...

Alfriedesq

iTrader: (6)

To me - I rather do it and know its right than risk taking out my whole engine and had over some stupid thing I knew about

HobieKopek

iTrader: (8)

Is it possible extreme heat (enough to melt the gasket) could occur without detonation due to the use of race fuel?

AvatarOfWar

iTrader: (2)

Evo-Bill's gasket went on 93 octane. I don't think there's any getting around the issue through not using NOS or race-gas, etc.

I'm buying the bolts as soon as Pruven gets them in, who cares what the cost to get them on is? I can afford it over the cost of a new engine.... (although if the motor went, the wife would HAVE to let me get it rebuilt ).

Alfriedesq

iTrader: (6)

Its not that kind of issue - all the happens is that the end head bolt just starts to strech a little at a time till the corner of the gasket blows out and thats the end - - its a gradual process and is accelerated with higher boost - higher HP applications - race gas has nothing to do with it

EVOMIZ

iTrader: (11)

why not 1g bolts instead of 2g bolts?
everyone with 2g cars run 1g bolts

HobieKopek

iTrader: (8)

I didn't mean it was the race gas' fault. I mean that may have been the reason you wouldn't have detonation with the higher temps. Wouldn't the excessive heat/pressure that race fuel can handle before detonating make it easier to run leaner (and therefore at higher combustion temps) without noticable knock?

That was my reason for questioning. I guess it wasn't clear. I ask out of sheer curiousity.

Alfriedesq

iTrader: (6)

I think its a matter of how much HP you run - - having race gas causes you to be able to run a bit better timing and yoy get more HP - - if you added a boost controller or some other performance gaining mod then the effect would be the same

My theory is that when you go over about 300 whp - thats when they start to strech - - when you get to 400 whp they strech faster

The black pruven evo has 345 whp and they were on the way out

BadBoyBeltran

iTrader: (3)

What if you did not lean out the AF ratio with a S-AFC or other AF controller, you think this still woulda happened with 20 psi to redline?

I am sure a lot of you lean your AF ratios from the factory 8.8:1 (or somthing like that) to like around the 11s.

BadBoyBeltran

iTrader: (3)

Also, woulnt an upgraded fuel pump fix the #4 cylinder "lean" gas problem?

AvatarOfWar

iTrader: (2)

There is no confirmed lean condition in the #4 cylinder - it was just speculation in an above post.

I think Al hit it - the bolts are just crap and they stretch overtime. The more HP you're generating, the faster the degradation process.