possibly blew a piston
Evolving Member
Joined: Aug 2002
Posts: 420
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From: Las Vegas, NV
Originally Posted by pgmike
yes 7psi nonIC. many ppl were doing it "safely" before adn gabe told me i could do it too.
im not going to get forged pistons bc of the ridiculous price rrm and everybody else charges for them. 700 is a ripoff, especially in light of the fact that you can get 8 forged pistons that are twice the size for v8s for 300. plus im trying to curb my spending on this project jsut bc of the lunacy of really trying to make this car "fast". the cost to gain ratio is is ridiculously high. im thinking ill jus tpush 9-10psi when all is said and done when it is intercooled and getting proper air flow and fuel.
im not going to get forged pistons bc of the ridiculous price rrm and everybody else charges for them. 700 is a ripoff, especially in light of the fact that you can get 8 forged pistons that are twice the size for v8s for 300. plus im trying to curb my spending on this project jsut bc of the lunacy of really trying to make this car "fast". the cost to gain ratio is is ridiculously high. im thinking ill jus tpush 9-10psi when all is said and done when it is intercooled and getting proper air flow and fuel.
Originally Posted by Dookie
I seriously doubt that the oil pan had anything to do with this; that should be a totally non-related issue. As far as the piston goes, 7 psi is pushing the limits on a Non I/C'd set up IMO. What were your EGT temps if you have a one? Reason why I am asking is that you mentioned 80 mph at full boost. You were either in 3rd gear or 4th gear, and in those gears, thats when things start melting because you stay in boost longer.
and no i dont have an egt gauge, was going to order one and a new boost gauge in a couple days, but i guess i was just alittle too late.
i was not staying in boost for long, just short bursts. i have done a lot worse tho, staying in boost going 130mph for a long time before.
Originally Posted by Dookie
Good point. David Buschur is talking about selling forged pistons in another thread...check that out. Also, if the head is off (and I'm sure it will be), go ahead with the decom head gasket to push the boost some.
and from what i have read, i wouldnt be needing a decompression head gasket at 9-10psi of what i would be wanting to run. plus that would neccessitate getting a new rpw vernier cam gear too and the costs jsut start to rise more and more.
Evolving Member
Joined: Aug 2002
Posts: 420
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From: Las Vegas, NV
Originally Posted by pgmike
im not sayng the the bolt and oil pan had anythign to do with it, these other guys are jsut confusing you. its a sepearte but related issued bc it affects my ability to take off the oil pan to replace the pistons, whic since you said there arent threads in teh oil pan, tehnit wont be an issue.
and no i dont have an egt gauge, was going to order one and a new boost gauge in a couple days, but i guess i was just alittle too late.
i was not staying in boost for long, just short bursts. i have done a lot worse tho, staying in boost going 130mph for a long time before.
and no i dont have an egt gauge, was going to order one and a new boost gauge in a couple days, but i guess i was just alittle too late.
i was not staying in boost for long, just short bursts. i have done a lot worse tho, staying in boost going 130mph for a long time before.
Damn that sucks you didnt have one yet. I would be curious to know since your motor was blown. (What the EGT temps were.) I guess you wouldnt have to stay in boost longer, but since the gearing is different at higher gears, the exhaust temp goes up for some reason. I'm not a scientific guy but I'm assuming it's something to do with the 1/1 gear ratio in 4th?
Evolving Member
Joined: Aug 2002
Posts: 420
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From: Las Vegas, NV
Originally Posted by pgmike
could you link me to the threa eral quick?
and from what i have read, i wouldnt be needing a decompression head gasket at 9-10psi of what i would be wanting to run. plus that would neccessitate getting a new rpw vernier cam gear too and the costs jsut start to rise more and more.
and from what i have read, i wouldnt be needing a decompression head gasket at 9-10psi of what i would be wanting to run. plus that would neccessitate getting a new rpw vernier cam gear too and the costs jsut start to rise more and more.
As far as the head gasket goes, if you just do the first stage one, you dont have to modify anything at all. Could be wrong though.
stg1 as in just droppign the compression by .5? maybe bc i was looking at the gasket that would drop it .75 before and was told that needed the sprocket. thanks for the link.
Evolving Member
Joined: Apr 2004
Posts: 120
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From: Miami, Fl
hey wuzzup mike, sorry to here about the car, but when u do decide what ur going to do with the motor let me know. becuase if ur thinking about running with a stk motor like myself, i will let u know that exect setup that i'm using in my car that has allowed me to run at 10pds of boost for the last year with no problems. and as for the egt that is a good gauge to have becuase it is pretty accurate. i'm running the gauge in my car and it goes up to about 12.5 at full boost which means the car is running pretty rich ehich is what u want. and it will give u enough time that when u see it climb past 14 which is the max safe zone that u should let off because something bad is about to happen. but good luck and let me know if u need any help with anything!!
Evolving Member
Joined: Apr 2004
Posts: 120
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From: Miami, Fl
oh also forgot to tell u if u need any forged pistons and rods let me know because i know ur here in fl. and remeber i have a good friend at Euroexport that can get u a nice set of pistons and rods for a resonable price and u will have them the next day because they are currently in stk
