Another 900hp LQ4
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From: Detroit
Another 900hp LQ4 I know its been done before, probably more times than I know of 
Just thought I'd post up and give a shout out to a couple people. Gilbert @ Ace Racing Transmissions for a stout 4L80e to take the abuse, Dave @ Yank for making the best converters on the market, and Jarrett/stock48 for his turbo cam. Quick specs on the setup:
2004 Silverado Z71
2006 150k mile LQ4, untouched short block
Stock 317 heads, surfaced
PRC 675 springs
LS9 gaskets
ARP studs
Isky 'triple 12' cam, 212/212 112LSA
Pro Yank 3400 multi disc converter
Eboost street 40 boost controller
ETS intercooler
Twin GT3582r turbos on a flipped manifold kit
Pulls were made on a Dynocom dyno at around 11am in Phoenix, AZ. Ambient temp was 97 degrees. Unlocked converter. Fuel is a mix of 60% E85 and 40% 91 octane. Drove it in on my street tune and left it on spring pressure with the boost controller off. Made some 6psi pulls and I believe it put down 550hp/540tq. Turned it up to 17psi and started seeing 900!
Highest numbers were 950/855. Also made another pull at 946hp, and a couple in the 910-920hp range. The dyno operator only gives the middle pull, so I've got the graph for the 935/863 pull. Numbers are SAE uncorrected. Overall I'm very happy with the power it made as I was not expecting that much at all! The best part was driving 3 hours to the dyno, making a bunch of pulls and driving back in the Arizona heat with AC on and not having a single problem. I had it on 20psi the night before but decided against trying to push the boost any higher in the heat. With a couple more pounds and some cooler weather this might be a 1000hp combo
Thanks again to Gilbert, Dave, and Jarrett!
Just thought I'd post up and give a shout out to a couple people. Gilbert @ Ace Racing Transmissions for a stout 4L80e to take the abuse, Dave @ Yank for making the best converters on the market, and Jarrett/stock48 for his turbo cam. Quick specs on the setup:2004 Silverado Z71
2006 150k mile LQ4, untouched short block
Stock 317 heads, surfaced
PRC 675 springs
LS9 gaskets
ARP studs
Isky 'triple 12' cam, 212/212 112LSA
Pro Yank 3400 multi disc converter
Eboost street 40 boost controller
ETS intercooler
Twin GT3582r turbos on a flipped manifold kit
Pulls were made on a Dynocom dyno at around 11am in Phoenix, AZ. Ambient temp was 97 degrees. Unlocked converter. Fuel is a mix of 60% E85 and 40% 91 octane. Drove it in on my street tune and left it on spring pressure with the boost controller off. Made some 6psi pulls and I believe it put down 550hp/540tq. Turned it up to 17psi and started seeing 900!
Highest numbers were 950/855. Also made another pull at 946hp, and a couple in the 910-920hp range. The dyno operator only gives the middle pull, so I've got the graph for the 935/863 pull. Numbers are SAE uncorrected. Overall I'm very happy with the power it made as I was not expecting that much at all! The best part was driving 3 hours to the dyno, making a bunch of pulls and driving back in the Arizona heat with AC on and not having a single problem. I had it on 20psi the night before but decided against trying to push the boost any higher in the heat. With a couple more pounds and some cooler weather this might be a 1000hp combo
Thanks again to Gilbert, Dave, and Jarrett! Last edited by smokeshow; Jun 12, 2013 at 02:39 PM.
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From: Detroit
Yeah it wasn't too expensive. Probably $25k including the purchase of the truck, which was $9500. I do all my own labor and tuning so that keeps the price down quite a bit. I've built a few 4L80e's myself that have taken some good power, but this one I had shipped off to Ace because of the amount of power I planned on putting to it. So that added to the $$$ a bit.
Still have a short list of additions for it, including a true trac for the rear end (open diff now lol), some engine bay heatproofing, and possibly a compound intercooling system using the AC system. That'll add to the overall cost, but it runs nicely as is
Still have a short list of additions for it, including a true trac for the rear end (open diff now lol), some engine bay heatproofing, and possibly a compound intercooling system using the AC system. That'll add to the overall cost, but it runs nicely as is
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03 cvx
03 cvx
Thread Starter
TECH Senior Member
iTrader: (17)
Joined: Feb 2009
Posts: 6,687
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From: Detroit
Thread Starter
TECH Senior Member
iTrader: (17)
Joined: Feb 2009
Posts: 6,687
Likes: 44
From: Detroit
