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550+ RWHP LS7? Is this possible?

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Old Nov 15, 2007 | 08:31 PM
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Default 550+ RWHP LS7? Is this possible?

Just wondering what it takes to make 550 plus at the tires with an LS7 and a T56. Naturally aspirated and no spray.
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Old Nov 15, 2007 | 08:31 PM
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Trick Flow heads and a big cam with a good exhaust.
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Old Nov 15, 2007 | 08:39 PM
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hmm with a t56 trans i dont think it would really take a big cam and heads at all to get it to 550 at the wheels i think maybe just a decent size cam would get it there
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Old Nov 15, 2007 | 09:36 PM
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I'm running a 427 with the Texas Speed LS7's and 11:1 compression.
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Old Nov 16, 2007 | 07:57 AM
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Originally Posted by gen3performance
I'm running a 427 with the Texas Speed LS7's and 11:1 compression.
That should have ya close already.....
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Old Nov 16, 2007 | 09:19 AM
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i can't remember the guys name but with a 23x/24x duration @.050 .58x/ .59x lift cam he had 56x rwhp with ported ls7 heads. with the right stick in there 550+ should be fairly easy.
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Old Nov 16, 2007 | 12:34 PM
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The one in my RX7 made 540 and climbing before oil pressure became an issue and I had to have it rebuilt (I blocked off an oil passage). It had stock LS7 heads and Katech's LS7 torquer cam. I did have the intake ported, but I don't know if that made any difference. I also high rev lifters the SPDC sells. I'm sure we would have hit 550 with a little more tuning.
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Old Nov 16, 2007 | 04:40 PM
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Originally Posted by 3.4camaro
Trick Flow heads and a big cam with a good exhaust.
You can get well past 550 rw without going to different heads. LG does a pretty good job. I really don't think their cams are all that big either.

GM left a lot on the table with the LS7. There is a ton of power lurking in that basic engine if you know where to find it.
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Old Nov 16, 2007 | 05:07 PM
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Originally Posted by Old SStroker
You can get well past 550 rw without going to different heads. LG does a pretty good job. I really don't think their cams are all that big either.

GM left a lot on the table with the LS7. There is a ton of power lurking in that basic engine if you know where to find it.
Yep. No need for trick flows over the LS7 heads. No need for a huge cam either.
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Old Nov 16, 2007 | 05:26 PM
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i cant remember which car mag is was that i was reading but it was defenantly one with chevy in the title and they grabed one of the crate motors and put a cam and long tube headers and made somthing like 592 HP or pretty close to it.
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Old Nov 16, 2007 | 06:14 PM
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Originally Posted by gen3performance
Just wondering what it takes to make 550 plus at the tires with an LS7 and a T56. Naturally aspirated and no spray.
Our Torquer cam in an LS7 usually makes 550-560rwhp on Dynojets.
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Old Nov 16, 2007 | 06:19 PM
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Well in that case, what does it take to make 600 at the tire. Also, I have been looking at the katech torquer a lot, but what is that world challenge cam i have been hearing about. Any specs on that?
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Old Nov 16, 2007 | 06:25 PM
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Originally Posted by gen3performance
Well in that case, what does it take to make 600 at the tire. Also, I have been looking at the katech torquer a lot, but what is that world challenge cam i have been hearing about. Any specs on that?
600rwhp is a lot harder. It would take a very wild cam that would not be streetable in my opinion.
WC cam is 239/251/.602/.602(1.8RAR)/106.5
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Old Nov 16, 2007 | 10:02 PM
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03 BUSA Made 560rwhp 520rwtq with TSP LS7 427 and TSP PRC ported L92 with stock unported
L76 Intake through M6 4.10 10bolt but the cam is huge 259 266 or something close to that.
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Old Nov 16, 2007 | 10:37 PM
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Originally Posted by Katech
600rwhp is a lot harder. It would take a very wild cam that would not be streetable in my opinion.
WC cam is 239/251/.602/.602(1.8RAR)/106.5

I found the torquer cam to be extremely streetable. 600 RWHP! Geez you're greedy
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Old Nov 17, 2007 | 08:28 PM
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550+ RWHP is very doable with an LS7-headed 427. I agree that 600 RWHP is much harder. We are going to engine dyno our 454 cid LSX with our PRC ported LS7 heads after Thanksgiving. We will be trying a LOT of different camshafts from the true street cams to the wilder grinds. The factory LS7 heads flow right at 360 cfm on our bench, so you definitely have a cylinder head capable of 550 RWHP!

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Old Nov 18, 2007 | 08:05 PM
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Yeah, but is it going to be more easily achievable with the Texas Speed LS7's that I just bought from you Trevor. Hurry up and get those things dynoed man, I'm very anxious to see the results. This is Dave by the way
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Old Nov 18, 2007 | 08:41 PM
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We do this on a regular basis...lol. We've built several over 550rwhp. The highest on pump gas was 612 rwhp. We've got another one at 573 rwhp that idles at 900 and daily driven.
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Old Nov 18, 2007 | 08:52 PM
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Originally Posted by Trevor @ Texas Speed & Perf.
550+ RWHP is very doable with an LS7-headed 427. I agree that 600 RWHP is much harder. We are going to engine dyno our 454 cid LSX with our PRC ported LS7 heads after Thanksgiving. We will be trying a LOT of different camshafts from the true street cams to the wilder grinds. The factory LS7 heads flow right at 360 cfm on our bench, so you definitely have a cylinder head capable of 550 RWHP!

Trevor
Texas Speed & Performance

I'd love to see the results of that package (454 cid LSX, ported LS7 heads), so make sure you let us know Trevor!!!

I've been thinking about that combo for kicks and have been wondering what it'd make to the wheels in an F-body.
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Old Nov 18, 2007 | 09:55 PM
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one of the local guys here went well over the 500RW mark with a LS2 427 and stock slightly ported LS7 top end and a small cam.

550 should be cake.
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