I still want to know the highest power an all stroke ls1/ls6 has made.

Just curious.

Seems that all the guy making the big numbers are big bore guys.

 

I'm getting a much better set of heads pretty soon. going solid roller too.... hoping to hit close to 500rhwhp. will definately keep you all updated.

 

I would go back to the other headers, sounds like they were working better for you.

I would go pretty big on the cam as well (240 intake duration minimum)

463RWHP And 450+ RWTQ is very good IMO.

Cheers,
Chris

 

You can see my 383 dyno #'s in my sig. below. I will be getting a 3" Y-Pipe soon to replace the FLP 2 1/2", so I expect to pick up some more rwhp from that, hopefully get to 470rwhp/450+rwtq.

I asked Jayson at MTI recently about 1 7/8" primary headers, and he said the car doesn't need them yet, just do the 3" y-pipe. He is also going to wideband tune the car which he said should pick up some more power.

Randy

 

Seems like 455ish is the limit on these with LS1 heads and 470-475 with LS6 heads.

Unless of course you do solid roller or some insane compression.

 

BTW I should have new numbers by Thursday.

 

down the line, might try that along with a reverse split

 

made 478 rwhp with the new cam. Gained hp and tq all above 5100rpm, no underdrive pulley. I oculdnt justify 400+ bucks on the ATI for almost no gain. Below that, I lost some significant power though.

I am going to try some 1 3/4" headers and the 1 7/8" I have right now back to back on the dyno to see how it compares.

 

Have you ever thought about trying the new LG headers?

 

Yep I have. Problem is they wont sell them w/o the 3" mid pipe. I already have everything 3" from the headers back that I had to do cutting and mods to make work and I cant get rid of it.

I would definitely try them if they would sell just the headers themselves for a lower price.