experts needed: LS3 Safe Boost
Le Mans Master
Joined: Dec 2005
Posts: 7,002
Likes: 1,687
From: Southeast TX
The Ls3 motor are a new style motor that can handle certain amount of power safetly, after trying to make over 700rwhp the rods gives up, some may think it is safe until it goes into pressure, dyno Queens and searching for numbers are quite safe but that is where it stops.
I can safely say, the connecting rods will not handle over 700rwhp under heavy pressure(high RPM constantly) or constant racing.
Don't ask me how I know, its a secret.
I can safely say, the connecting rods will not handle over 700rwhp under heavy pressure(high RPM constantly) or constant racing.
Don't ask me how I know, its a secret.
Speedy
Joined: Mar 2007
Posts: 6,112
Likes: 931
From: Tn
2024 C8 of the Year Finalist - Modified
its not necessarily the motor, its bad gas causing detonation, a forged piston can take more abuse then say a cast unit in the event that some bad gas gets sprayed in
3rd Gear
Joined: Dec 2009
Posts: 3
Likes: 0
Spin the first thought was the piston but after good examination we realized it was the rod that gave up, I was even told by a pro. the rod cannot take the abused.
Thread Starter
Instructor
Joined: Apr 2009
Posts: 205
Likes: 19
From: Denver Colorado
St. Jude Donor '09
update / FYI
got my car tuned today...
making 9.8 lbs of boost
645 rwhp / 567 tq on 91 octane pump gas
could not do better than that as we kept getting knock and timing would be pulled because of it.
I was hoping for better, but with this **** gas we have in Oklahoma that seems to be the best I can get, which is still a nice 30- 35 HP gain in most places under the curve from 5K rpm 6700 rpm...so I guess I am "happy"
got my car tuned today...
making 9.8 lbs of boost
645 rwhp / 567 tq on 91 octane pump gas
could not do better than that as we kept getting knock and timing would be pulled because of it.
I was hoping for better, but with this **** gas we have in Oklahoma that seems to be the best I can get, which is still a nice 30- 35 HP gain in most places under the curve from 5K rpm 6700 rpm...so I guess I am "happy"
3rd Gear
Joined: Dec 2009
Posts: 3
Likes: 0
update / FYI
got my car tuned today...
making 9.8 lbs of boost
645 rwhp / 567 tq on 91 octane pump gas
could not do better than that as we kept getting knock and timing would be pulled because of it.
I was hoping for better, but with this **** gas we have in Oklahoma that seems to be the best I can get, which is still a nice 30- 35 HP gain in most places under the curve from 5K rpm 6700 rpm...so I guess I am "happy"
got my car tuned today...
making 9.8 lbs of boost
645 rwhp / 567 tq on 91 octane pump gas
could not do better than that as we kept getting knock and timing would be pulled because of it.
I was hoping for better, but with this **** gas we have in Oklahoma that seems to be the best I can get, which is still a nice 30- 35 HP gain in most places under the curve from 5K rpm 6700 rpm...so I guess I am "happy"
Just install a meth kit and you will be able to do better, but be carefull, because the rods are not as strong as the other parts in the motor.
Thread Starter
Instructor
Joined: Apr 2009
Posts: 205
Likes: 19
From: Denver Colorado
St. Jude Donor '09
) If I add meth then I could use it as protection from bad gas, but not tune for it... at least thats my preference.I was hoping to get around 670ish with the addition of 3.5lbs of boost (9.8 -10 lbs total boost and the KB BAP turned all the way up with 65 lb injectors ) but the car just couldnt do it...
one thing to note is the number is WITH my air intake on * DP Big mouth* I believe in tuning with what the car actually with be driven with daily.
Burning Brakes
Joined: May 2007
Posts: 887
Likes: 1
From: Dallas TX
update / FYI
got my car tuned today...
making 9.8 lbs of boost
645 rwhp / 567 tq on 91 octane pump gas
could not do better than that as we kept getting knock and timing would be pulled because of it.
I was hoping for better, but with this **** gas we have in Oklahoma that seems to be the best I can get, which is still a nice 30- 35 HP gain in most places under the curve from 5K rpm 6700 rpm...so I guess I am "happy"
got my car tuned today...
making 9.8 lbs of boost
645 rwhp / 567 tq on 91 octane pump gas
could not do better than that as we kept getting knock and timing would be pulled because of it.
I was hoping for better, but with this **** gas we have in Oklahoma that seems to be the best I can get, which is still a nice 30- 35 HP gain in most places under the curve from 5K rpm 6700 rpm...so I guess I am "happy"
Burning Brakes
Joined: Dec 2006
Posts: 1,165
Likes: 1
From: Houston TX
I would say it's about average on the power as he does have a cam. I'm at 600 rwhp with no cam, pump gas, no meth, etc. Basically blower & exhaust (headers, catless x-pipe, catback) with 10 psi. Cam gains vary, but I would think with the right cam, I could be as high as 675rwhp, maybe more. I hear that with the right blower cam, gains can be as high as 100rwhp.
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Thread Starter
Instructor
Joined: Apr 2009
Posts: 205
Likes: 19
From: Denver Colorado
St. Jude Donor '09
the tune is conservative...so summer time driving should be okay
as far as the cam goes...its NOT a blower cam, but a torque cam when I was running all motor
223 / 240 610 lift and 112 LSA....
so I guess all in all I am happy...might swap cams out one of these days but to be honest 645 is more than I can put to the pavement anyways
as far as the cam goes...its NOT a blower cam, but a torque cam when I was running all motor
223 / 240 610 lift and 112 LSA....
so I guess all in all I am happy...might swap cams out one of these days but to be honest 645 is more than I can put to the pavement anyways
Former Vendor
Joined: Jun 2006
Posts: 1,622
Likes: 3
From: Dallas TX
Burning Brakes
Joined: Dec 2006
Posts: 1,165
Likes: 1
From: Houston TX
I don't speak from personal experience, I was just stating what I have been informed. I was always under the impression that with the right blower cam, gains are from 50-100 rwhp, with 80 being the norm. Even at 50 rwhp, I'd be a happy camper.
