Head Gasket Failure !
I've not cracked the head of a Mitsu 4 banger yet (all kinds of fun with the 6), but I would suspect the cams got to come out to re-torque the head bolts... If I'm going to go through that much trouble, I'm putting in a $100 set of ARP studs.
Running 21psi is safe, the 50 shot and race gas is another story. I believe those are your contributing factors.
the 50 shot does not help, but the race fuel is used to control detonation ! ! the real problem is the ability for the stock head bolts to retain the required "clamping" force ! ! the stock head gasket is one of the best I have seen ! !
the 50 shot does not help, but the race fuel is used to control detonation ! ! the real problem is the ability for the stock head bolts to retain the required "clamping" force ! ! the stock head gasket is one of the best I have seen ! !
Originally posted by ferrarokid
Running 21psi is safe, the 50 shot and race gas is another story. I believe those are your contributing factors.
the 50 shot does not help, but the race fuel is used to control detonation ! ! the real problem is the ability for the stock head bolts to retain the required "clamping" force ! ! the stock head gasket is one of the best I have seen ! !
Running 21psi is safe, the 50 shot and race gas is another story. I believe those are your contributing factors.
the 50 shot does not help, but the race fuel is used to control detonation ! ! the real problem is the ability for the stock head bolts to retain the required "clamping" force ! ! the stock head gasket is one of the best I have seen ! !
BUt if you kee breaking all your parts at this rate soo you will have brand new evo again!!!! Maybe an adjustment of the loose nut behind the wheel is in order ?
To date .. the only broken parts are : front diff - cylinder head ! !
the head looks like it has been slowly going over time ! ! the n.o.s has been only used 4 times ! ! the bottom end is perfect . but while im here the rods and piston HAVE to get done ! !
the head looks like it has been slowly going over time ! ! the n.o.s has been only used 4 times ! ! the bottom end is perfect . but while im here the rods and piston HAVE to get done ! !
I was able to put new head bolts in my GSX without taking out the cams... They stretched but I was able to catch them and install new ones...
So, maybe we should all re-torque the head bolts now?! Maybe that'll save us in the long run.. Could be a factory glitch that they weren't torqued enough from the manufacturer??!
So, maybe we should all re-torque the head bolts now?! Maybe that'll save us in the long run.. Could be a factory glitch that they weren't torqued enough from the manufacturer??!
it's possible that from the factory some bolts were not properly torqued. Another possibility is that since running NOS without a separate fogger for every cylinder can and does cause an imbalance of nitrous to every intake runner. In other words #4 cylinder might have gotten an extra 10-20 % more nitrous than the rest. Detonation might have not occured, but excessive pressure might have blown that gasket away.
Originally posted by superz
it's possible that from the factory some bolts were not properly torqued. Another possibility is that since running NOS without a separate fogger for every cylinder can and does cause an imbalance of nitrous to every intake runner. In other words #4 cylinder might have gotten an extra 10-20 % more nitrous than the rest. Detonation might have not occured, but excessive pressure might have blown that gasket away.
it's possible that from the factory some bolts were not properly torqued. Another possibility is that since running NOS without a separate fogger for every cylinder can and does cause an imbalance of nitrous to every intake runner. In other words #4 cylinder might have gotten an extra 10-20 % more nitrous than the rest. Detonation might have not occured, but excessive pressure might have blown that gasket away.
What were you guys using to detect knock btw?
The rod bolts are 2nd gen
The othere vo I took apart never had NOS and it also had the same problem
also - the guy in Chicago who blew up his motor didnt have nos as far as I know
Even if you re-trq the stock bolts - I am sure they will just streach again - they are just not up to applications over 300 whp
The othere vo I took apart never had NOS and it also had the same problem
also - the guy in Chicago who blew up his motor didnt have nos as far as I know
Even if you re-trq the stock bolts - I am sure they will just streach again - they are just not up to applications over 300 whp