400+ ci LS9 blower speed?
Thread Starter
Staging Lane
Joined: Oct 2006
Posts: 76
Likes: 0
From: Graz, Austria
400+ ci LS9 blower speed? Hi,
have finished buidling a 4xxci ERL superdeck engine with ported LS9 heads (Lingenfelter) pretty big track racing cam to replace a blown up LS9 enginein a ZR1. We reuse the LS9 supercharger with all stage 3 upgrades (snout, ported intake, cold air box, full LG headers + Akrapovic, pulleys) but not so sure how much the bigger displacement hurt the little 2.3l blower in terms of heat build up. overspinning it or slowing it down?
Right now running a stock sized ATI crank dampner with a LPE 2.38" pulley, but i am thinking about slowing down blower with a 2,60" pulley to help feeding the larger engine and to keep intake tempy down.
or could go with a 14% OD pulley and chose between any of above pulleys.
what do you think?
it is will be trade off between hp and reliability at the track of course
hz
have finished buidling a 4xxci ERL superdeck engine with ported LS9 heads (Lingenfelter) pretty big track racing cam to replace a blown up LS9 enginein a ZR1. We reuse the LS9 supercharger with all stage 3 upgrades (snout, ported intake, cold air box, full LG headers + Akrapovic, pulleys) but not so sure how much the bigger displacement hurt the little 2.3l blower in terms of heat build up. overspinning it or slowing it down?
Right now running a stock sized ATI crank dampner with a LPE 2.38" pulley, but i am thinking about slowing down blower with a 2,60" pulley to help feeding the larger engine and to keep intake tempy down.
or could go with a 14% OD pulley and chose between any of above pulleys.
what do you think?
it is will be trade off between hp and reliability at the track of course
hz
Last edited by coolchevy; Dec 20, 2012 at 12:29 PM.
I say keep the stock upper in place, and just use the OD balancer. I know what ZR1s do at the road course, and when spun at MAX blower speed, the cooling systems cannot shed enough heat to make them reliable.
On The Tree
Joined: Aug 2004
Posts: 104
Likes: 2
From: Central, IL
I've been twice many years ago and this is one of the coolest tracks in the world. Would love to see this 427 hauling around it.
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Thread Starter
Staging Lane
Joined: Oct 2006
Posts: 76
Likes: 0
From: Graz, Austria
sorry putting a bigger blower on it is not on the agenda (for now). If a bigger blower then probably a 2.9 or 3.6l Whipple instead of the 2.3l TVS. This is a no nonsense no BS track car which held records on Sachsenring and Hockenheimring and won against 800hp Porsches. 2013 titles will be conquered back with new setup thus the name of the game is maximising the setup for power and reliability.
which brings us back to topic, slowing down supercharger or speeding up, can do both we are in the middle of it. Intercooler system has been completely changed except the bricks in the plenum.
here just one pic of it
and a link with a professionial driver
which brings us back to topic, slowing down supercharger or speeding up, can do both we are in the middle of it. Intercooler system has been completely changed except the bricks in the plenum.
here just one pic of it
and a link with a professionial driver
Last edited by coolchevy; Dec 20, 2012 at 12:37 PM.
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Staging Lane
Joined: Oct 2006
Posts: 76
Likes: 0
From: Graz, Austria
that is the question. It could, but spinning it near or over max could throw PD out of a tolerable efficiency window and it would just generate lots of heat but no more power. Actually if it can't fill the bigger engine power might go down too?
A dual pass heat exchanger might help if that's the problem. Used to do it to friends cobras quite a bit back in the day. Next thought is if the coolers are efficient enought to cool the charge inside the blower while spinning it so fast.
