how far can it go?
10-02-2008, 01:36 AM
#1
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how far can it go? hey guys how far have you pushed your stock short block. and how long did it last?
i have been runnig 12psi for some time. i just got a meth kit and want to up the boost to 15psi with a good tune of course. i do have ARP rod bolts
thanks for the info
i have been runnig 12psi for some time. i just got a meth kit and want to up the boost to 15psi with a good tune of course. i do have ARP rod bolts
thanks for the info
10-02-2008, 02:06 AM
#2
Tom...have you ever seen the stock pistons? I have several souvenirs from guys I know with sts camaro and ati ta.
Both have ringlands blown clean off. Could show you pics but might have thrown them out or mabye they are still in my garage.
These guys were not going much past 8psi and the one guy really knows his stuff tuning wise.
Don't do it. I have another guy I know with sts at 5psi for like two years now. Stay at like 7 and enjoy your car. Unless you want to rebuild that engine sooner rather than later!
You said you have oil coming out one side even after they sent it back or a new one. Maybe you already have problems with the engine on that side. Mabye should do a compression ,leakdown test on that side and see what you find.
Course it might just be too much oil pressure.Think those high pressure springs are more for strokers with bigger clearances than stock motors and JM said he didn't have any smoking problems and he has like the big melling with high pressure spring.
Anyway bit off topic.I vote to stay at 7 maybe 8psi tops! Keep a safe tune afr and timing wise and then do an engine down the road forged up like mine if you want to go to 15psi. Greedy gets expensive in FI!
Both have ringlands blown clean off. Could show you pics but might have thrown them out or mabye they are still in my garage.
These guys were not going much past 8psi and the one guy really knows his stuff tuning wise.
Don't do it. I have another guy I know with sts at 5psi for like two years now. Stay at like 7 and enjoy your car. Unless you want to rebuild that engine sooner rather than later!
You said you have oil coming out one side even after they sent it back or a new one. Maybe you already have problems with the engine on that side. Mabye should do a compression ,leakdown test on that side and see what you find.
Course it might just be too much oil pressure.Think those high pressure springs are more for strokers with bigger clearances than stock motors and JM said he didn't have any smoking problems and he has like the big melling with high pressure spring.
Anyway bit off topic.I vote to stay at 7 maybe 8psi tops! Keep a safe tune afr and timing wise and then do an engine down the road forged up like mine if you want to go to 15psi. Greedy gets expensive in FI!
10-02-2008, 08:10 AM
#3
10-02-2008, 08:33 AM
#4
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12psi is to much.. From what ive looked up- and seen- the mark around 8-9psi is all you want to go on a stock bottom end.. (if u want it to last) hopefully whatever ya do- works out for ya..
10-02-2008, 10:56 AM
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thanks for the info i just think LSX are just under rated is all for what they can take
but i know im pushing it. 99ta for the leakdown and comp. test i did that not long ago and it blow my mine how well it did. i even had my friend there to check my work. he has a that 30psi, 150 shot GN that car rocks, that and he is alot smarter than me
i dont want to run a ringland into a turbo so ill just stay at the boost im at.
alittle info ive been running 12psi for half the year and the engine is fine so far
i think it has alot to do with the tune and maybe alittle luck
but i know im pushing it. 99ta for the leakdown and comp. test i did that not long ago and it blow my mine how well it did. i even had my friend there to check my work. he has a that 30psi, 150 shot GN that car rocks, that and he is alot smarter than me
i dont want to run a ringland into a turbo so ill just stay at the boost im at.
alittle info ive been running 12psi for half the year and the engine is fine so far
i think it has alot to do with the tune and maybe alittle luck
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10-02-2008, 11:05 AM
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These generalizations are misleading. Its all in the tune.
I ve got one going on three years that is ussualy 12-14 psi. But thats with 317 heads, mls gaskets and arp studs. Thats with a larger fmic and water/meth and 91 octane.
Its been higher and never lower then 10 with a bb 72 turbo.
Another has the same basic set up with a z06 cam 76 turbo and has been run higher then 14 with no meth and race gas.
I ve got a 4.8 all stock running 12-14, in a truck.....and a 6.0 all stock n a awd ss running 10-12 (smaller intercooler) and both run water meth with 91.
It can be done, but diagnostics, and knock control is the key, with the set up and tune.
I ve got one going on three years that is ussualy 12-14 psi. But thats with 317 heads, mls gaskets and arp studs. Thats with a larger fmic and water/meth and 91 octane.
Its been higher and never lower then 10 with a bb 72 turbo.
Another has the same basic set up with a z06 cam 76 turbo and has been run higher then 14 with no meth and race gas.
I ve got a 4.8 all stock running 12-14, in a truck.....and a 6.0 all stock n a awd ss running 10-12 (smaller intercooler) and both run water meth with 91.
It can be done, but diagnostics, and knock control is the key, with the set up and tune.
10-02-2008, 12:26 PM
#10
I thought most if not all the truck blocks were iron. 6.0 iron blocks are very strong and have taken north of 1200 hp. think engine hp.
I guess you can get the stock blocks to live with great tuning. Just that I saw the results of two that didn't survive.One was just slightly overboosted he overtightened the belt on his ati which was set to 8psi I think. And the sts guy didn't understand his boost controller and think it hit 15psi.
Whatever I am glad don't have to worry about stock short block anymore.
I guess you can get the stock blocks to live with great tuning. Just that I saw the results of two that didn't survive.One was just slightly overboosted he overtightened the belt on his ati which was set to 8psi I think. And the sts guy didn't understand his boost controller and think it hit 15psi.
Whatever I am glad don't have to worry about stock short block anymore.
10-02-2008, 01:41 PM
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These generalizations are misleading. Its all in the tune.
I ve got one going on three years that is ussualy 12-14 psi. But thats with 317 heads, mls gaskets and arp studs. Thats with a larger fmic and water/meth and 91 octane.
Its been higher and never lower then 10 with a bb 72 turbo.
Another has the same basic set up with a z06 cam 76 turbo and has been run higher then 14 with no meth and race gas.
I ve got a 4.8 all stock running 12-14, in a truck.....and a 6.0 all stock n a awd ss running 10-12 (smaller intercooler) and both run water meth with 91.
It can be done, but diagnostics, and knock control is the key, with the set up and tune.
I ve got one going on three years that is ussualy 12-14 psi. But thats with 317 heads, mls gaskets and arp studs. Thats with a larger fmic and water/meth and 91 octane.
Its been higher and never lower then 10 with a bb 72 turbo.
Another has the same basic set up with a z06 cam 76 turbo and has been run higher then 14 with no meth and race gas.
I ve got a 4.8 all stock running 12-14, in a truck.....and a 6.0 all stock n a awd ss running 10-12 (smaller intercooler) and both run water meth with 91.
It can be done, but diagnostics, and knock control is the key, with the set up and tune.
317s
04 ZO6 cam
arp studs
i run 6.0L gaskets
ARP conneting rod bolts
91 octane and meth is not on yet but as soon as i get back from here
as i said its all in the setup and tune guys
10-02-2008, 02:16 PM
#12
I would play all you want but remember that you might need to get an engine at some point. So if the car is not daily driver and most of these aren't and you can put up with some downtime then no big deal. Remember what I said though.If you lose your rings and they go thru the turbos you will be looking at some money there fixing /replacing them. Not to scare you Tom. Its your engine and your car and you do what you want. Safe tune of course is the key. But pretty sure guy with ati was safe. I should see if do have that piston somewhere and take a pic. It looks almost normal at first till you notice the ringlands are gone.
If you are bit tight on bucks a nice 370 with stock iron block crank is a good choice. Just get forged rods and pistons and good arp mains, bolts ,head studs,you already have some parts and away you go. Pretty cheap way to very strong engine.
I just wanted a bit bigger so main reason spent the extra and did of course get a forged crank. Now that engine is not going to be weak link have to save up for built 480le and dana 60.
If you are bit tight on bucks a nice 370 with stock iron block crank is a good choice. Just get forged rods and pistons and good arp mains, bolts ,head studs,you already have some parts and away you go. Pretty cheap way to very strong engine.
I just wanted a bit bigger so main reason spent the extra and did of course get a forged crank. Now that engine is not going to be weak link have to save up for built 480le and dana 60.
10-02-2008, 03:14 PM
#14
My stock bottom end 5.3 has been running 15psi for 2 years. Beaten to death all the time. I also spray a 50 shot through it to.. all on pump gas. It just went 10.3x @ 131 saturday, race weight at 3650lbs. Just the cheaper felpro headgaskets with a light coat of spray paint and put together tacky. Vids in sig.
.
10-02-2008, 05:04 PM
#16
Several years ago there was a local 30th TA that was running 13psi making 630RWHP, he was a co owner of a performance shop and the car blew up about 3-4 times a year, they would just replace pistons when they broke. They ONLY did this to see what a stock LS1 w/an LS6 cam could do, they wouldn't even duplicate the kit for customers as they knew it wouldn't hold.
10-03-2008, 11:22 AM
#17
Several years ago there was a local 30th TA that was running 13psi making 630RWHP, he was a co owner of a performance shop and the car blew up about 3-4 times a year, they would just replace pistons when they broke. They ONLY did this to see what a stock LS1 w/an LS6 cam could do, they wouldn't even duplicate the kit for customers as they knew it wouldn't hold.
10-03-2008, 12:09 PM
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Anyway i don't have numbers yet as i'm still working out some problems with the car before it hits track.
10-03-2008, 02:27 PM
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Heh this reminds me of John (1320) talking to me when he was testing Zombie's car at the track when it was till a 6 speed with headers and a stock engine (cam only). Was at 650rwhp on the stock bottom end and had lasted a few months already. He said it should run for a good amount of time like that but sure enough, next time I looked Zombie up he had a forged 370ci motor. Heh... and he was running meth at the time to boot 
Stay safe man. Wait for the built motor to up the boost. Like others have said, I'd even turn it down for the time being. That is, unless money is no object.
Stay safe man. Wait for the built motor to up the boost. Like others have said, I'd even turn it down for the time being. That is, unless money is no object.
10-03-2008, 05:13 PM
#20
My stock bottom end 5.3 has been running 15psi for 2 years. Beaten to death all the time. I also spray a 50 shot through it to.. all on pump gas. It just went 10.3x @ 131 saturday, race weight at 3650lbs. Just the cheaper felpro headgaskets with a light coat of spray paint and put together tacky. Vids in sig.