550+ RWHP LS7? Is this possible?
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.
On The Tree
Joined: Aug 2006
Posts: 140
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From: Denver, CO
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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TECH Fanatic
Joined: Jun 2002
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From: Upstate NY
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.
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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Verdad Gallardo 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.
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.
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.
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?
WC cam is 239/251/.602/.602(1.8RAR)/106.5
On The Tree
Joined: Aug 2006
Posts: 140
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From: Denver, CO
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
Trevor
Texas Speed & Performance
__________________
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
This is Dave by the way 
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.
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
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.
