max boost on stock internals
12-22-2007, 01:39 PM
#11
6th Gear Member
Join Date: Feb 2006
Location:
Posts: 5,263
RE: max boost on stock internals
ORIGINAL: OnyxCobra
O_O
ORIGINAL: r.barn
20psi.
Boost does NOT kill engines.
Detonation kills engines.
If you tune, intercool and fuel it right you could run 18-20psi on stock internals.
20psi.
Boost does NOT kill engines.
Detonation kills engines.
If you tune, intercool and fuel it right you could run 18-20psi on stock internals.
It's all in the tune. 99.9999% of all boosted engine failures are
from melted pistons and blown head gaskets. That comes from detonation
Detonation comes from over aggressive or poor tune. Period.
Sometimes you do have factors like a stock computer not being able
to keep up with the tune you need, but thats another thread all together.
12-22-2007, 01:52 PM
#12
6th Gear Member
Join Date: Feb 2005
Location: KY
Posts: 13,396
RE: max boost on stock internals
ORIGINAL: r.barn
20psi.
Boost does NOT kill engines.
Detonation kills engines.
If you tune, intercool and fuel it right you could run 18-20psi on stock internals.
20psi.
Boost does NOT kill engines.
Detonation kills engines.
If you tune, intercool and fuel it right you could run 18-20psi on stock internals.
12-22-2007, 03:50 PM
#13
4th Gear Member
Join Date: Mar 2007
Location: Buffalo, NY
Posts: 1,541
RE: max boost on stock internals
ORIGINAL: r.barn
20psi.
Boost does NOT kill engines.
Detonation kills engines.
If you tune, intercool and fuel it right you could run 18-20psi on stock internals.
20psi.
Boost does NOT kill engines.
Detonation kills engines.
If you tune, intercool and fuel it right you could run 18-20psi on stock internals.
12-22-2007, 04:15 PM
#14
2nd Gear Member
Join Date: Feb 2006
Location: boston
Posts: 310
RE: max boost on stock internals
its true, the block is gona be maxed out before the pistons rods ect... jus make sure everything is up to speed like tune ups and ect. also getting a tune is very important, u say he doesnt have the money but, ide brather spendd 500 on a good tune, thjen thousand on a new engine
12-22-2007, 08:00 PM
#15
6th Gear Member
Join Date: Nov 2005
Location: Rochester, NY
Posts: 8,467
RE: max boost on stock internals
It makes sense I guess but it seems like if it was that easy more people would accomplish it successfully. I talked to a guy with a 12psi KB on an almost identical setup to mine and he said he has had it at 12psi for quite a while with zero problems and it was obviously not intercooled.
12-23-2007, 12:06 AM
#16
1st Gear Member
Join Date: Aug 2007
Location: Mosul, Iraq
Posts: 141
RE: max boost on stock internals
ORIGINAL: rydinturbo
its true, the block is gona be maxed out before the pistons rods ect... jus make sure everything is up to speed like tune ups and ect. also getting a tune is very important, u say he doesnt have the money but, ide brather spendd 500 on a good tune, thjen thousand on a new engine
its true, the block is gona be maxed out before the pistons rods ect... jus make sure everything is up to speed like tune ups and ect. also getting a tune is very important, u say he doesnt have the money but, ide brather spendd 500 on a good tune, thjen thousand on a new engine
12-23-2007, 12:29 AM
#17
2nd Gear Member
Thread Starter
Join Date: May 2007
Location: wa
Posts: 330
RE: max boost on stock internals
hmm... ok thanks guys. he told me the motor is completely stock except for a dizzy. lol
his poor engine. knowing him he's gonna flog the poor thing. i've never actually seen his pony, as he's in CO and i'm in WA... i'll let him know to take it easy until he can afford a tune and a fuel upgrade.
his poor engine. knowing him he's gonna flog the poor thing. i've never actually seen his pony, as he's in CO and i'm in WA... i'll let him know to take it easy until he can afford a tune and a fuel upgrade.
12-23-2007, 01:51 AM
#18
5th Gear Member
Join Date: Dec 2005
Location:
Posts: 2,005
RE: max boost on stock internals
I agree with r barn, but after that 12 boost factor, it gets to a point where 100 octane plus is required and so much timing needs to be taken out that if you do no run racing fuel all the time then it defeats all gains, unless of course you lower your compression with different pistons, thats the main reason why it makes more sense to most people since 93 gas is high enough as it is.
12-23-2007, 02:20 PM
#19
5th Gear Member
Join Date: Nov 2006
Location: Bay Minette Alabama
Posts: 3,080
RE: max boost on stock internals
Yea, with race gas and a good tune it won't die from detonation at 20 psi but his motor is stock. 20 psi = breaking the block in half. 12 lbs with a good tune would work though.
12-23-2007, 02:46 PM
#20
5th Gear Member
Join Date: Dec 2006
Location: louisiana
Posts: 2,763
RE: max boost on stock internals
a buddy has a s-trim, pullied to 14psi, all stock. 4.10's auto, and control arms and subframe
leaving off idle, 12.3 fastest, 12.6 adverage. no intercooler, 93 octane, and 255pump and Tweecer tuning.
he lifted a head at track, 113k miles on car, gasket didnt blow, put on TF heads and ported cobra intake, its prob got close to 450rwhp.
i built a 331, h/c/i, whole 9 yards. tq. converter wiped crank out, 2k later short block is fixed lol
should hit 325rwhp, i got about 10.3 CR, i plan to intercool turbo at about 5 PSI, it will be very fast.
leaving off idle, 12.3 fastest, 12.6 adverage. no intercooler, 93 octane, and 255pump and Tweecer tuning.
he lifted a head at track, 113k miles on car, gasket didnt blow, put on TF heads and ported cobra intake, its prob got close to 450rwhp.
i built a 331, h/c/i, whole 9 yards. tq. converter wiped crank out, 2k later short block is fixed lol
should hit 325rwhp, i got about 10.3 CR, i plan to intercool turbo at about 5 PSI, it will be very fast.