Onyx LS1

iTrader: (5)

On a dyno that reads correct numbers with NO dyno tricks that would be quite an acomplishment.
I quess it's possible through a light drivetrain with a good exhaust.

CHRISPY

With lots of compression, great flowing heads and stock drivetrain sure <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Chris

Colonel

Which brings the question, how much C/R can you get with the stock pistons?

I guess should also add that this 425 RWHP has to be done on pump gas.

dug

iTrader: (10)

Id go with a 222 218 cam with some open 1 7/8" headers. 400hp would be possible out of a m6 3.42 with all the bolt ons.

Phil99vette

iTrader: (11)

Didn't cartek just dyno 470+ on 4:10s with a total of 448? (222/226)
Phillip

Colonel

Sorry, 400 RWHP need not apply to this discussion. 425 RWHP or more only please. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

So you like the reverse split cam even for such a small cam?

The Juggernaut

iTrader: (7)

Hasn't happened yet.(don't give me that ESP 431rwhp stuff,because specs haven't been given)

But it will. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

Colonel

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by phil97svt:
<strong> Didn't cartek just dyno 470+ on 4:10s with a total of 448? (222/226)
Phillip </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">No. It was with 3.42s and the cam was a 224/228. That's an extra 12 degrees of duration which is alot, IMO. Still, MOST impressive! I wonder if the bottom end was stock. Any track times out of this car yet?

Linear Velocity

iTrader: (1)

Colonel, check out BadAss30th's post in this section, he just made 410 rwhp and 415 rwtq, with AAP Stage II heads and a 222/224 cam. I know that those numbers add up to 446 and that it's not 425rwp. But those number were with macs thru cats, ls1 intake manifold, and a unlocked convertor (does locking the convertor count as a dyno trick?). Anyway I'm willing to bet he'd be around 425 rwhp if he threw in a 220/220 cam, and had longtubes with dual cutouts, ls6 intake, and a locked convertor. It's all about the heads <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

<small>[ February 26, 2003, 01:38 PM: Message edited by: Linear Velocity ]</small>

Colonel

It would interesting to see if he could do it. Those are some damn fine numbers if the converter was unlocked.

Locking the converter is not a dyno trick. It's actually the only way to get an accurate reading and takes the efficiency of the converter out of the equation. If locking the converter were a dyno trick then I'd say using an M6 is too. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

Phil99vette

iTrader: (11)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Colonel:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by phil97svt:
<strong> Didn't cartek just dyno 470+ on 4:10s with a total of 448? (222/226)
Phillip </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">No. It was with 3.42s and the cam was a 224/228. That's an extra 12 degrees of duration which is alot, IMO. Still, MOST impressive! I wonder if the bottom end was stock. Any track times out of this car yet? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Colonel,
Just to be correct, they did just(last week) dyno 472/422 with 4:10s in a Z06. You take away that 12 degrees of cam and you still will have 450rwhp.
Phillip

Colonel

That's an assumption but I would tend to agree. Now, to actually see it brought out in practice.

Hey, do you know if that was with a stock bottom end? Could the LS6 bottom end in any way add a little power? I wouldn't think so but I don't know the specifics of what is different.

Phil99vette

iTrader: (11)

Cartek X package && 4.10s
http://forums.corvetteforum.com/zerothread?id=499746

niphilli

I have seen T1 dyno sheets with good S2's full bolt-ons and stock 3.42 rear knock on the door of 425 SAE 221/221 = 442 close enough. I would wager that JPR would probably put down numbers close to that with the TR 220 and his S2's (full bolt on).

-Nick

gator's 99TA

iTrader: (2)

Mark aka smkur50 at raging motorsports made 435 RWHP and 410 RWTQ with his 5.7 heads, B1 cam, and moser rear with 4.10s over a year ago with absolutely no dynotricks on heavy *** fiskes 17x11 wheels, McLeod flywheel (not light), etc.

it is certainly possible with a stock drivetrane. also, this was a while ago and improvements have been made in head tech and other boltons.

John B

iTrader: (10)

I think it is very easily done. With my B1 having 442 total degrees I'm at 424 RWHP through full exhaust and steel flywheel.

Linear Velocity

iTrader: (1)

Colonel you could be right about the LS6 bottom end, Bad30th has an LS6 block because his original one was chewed up do to a piston failure. But who knows, we are pushing for him to get an LS6 intake and lock the convertor on the dyno hopefully we'll get a little more conclusive numbers then.

Colonel

435 RWHP with a B1 cam and a Moser 4.10 rearend is VERY impressive if all it had was bolt-ons and heads/cam. 435 with aftermarket pistons, rods, etc. and through a stock rearend.. well, that would be impressive enough but this is astounding. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

Can you verify that bolt-ons, heads/cam were the ONLY mods? And that the dyno results were corrected on a Dynojet?

With a stock rearend and stock gears you're looking at an easy 450 RWHP. Add LS6 heads to that and you're probably looking at 465 RWHP. Then give it higher compression lightweight pistons, lightweight rods, some lightweight wheels, a lightweight flywheel, C/F driveshaft and you have what? 480-485 RWHP from a stock CI engine with a B1 cam? That would be almost unbelievable. Now, toss in an X1 cam to see 500 RWHP! <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

LOL! Just kidding but it's funny and neat to ponder how numbers sometimes just don't seem to add up.

Tim 98z

iTrader: (1)

Colonel-this is sort of off topic but your last post hits home. I get sick of hearing how much will this add and how many tenth is this worth? Every mod seems to be worth a tenth or two when you read about it. Then you sit back and think, damn i should be in the 9's if that were true! Yet still sitting in the 11's <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

dug

iTrader: (10)

Oops, I didnt see the 425hp and didnt realize ported heads were allowed either. In that case 425hp is still doable with the heads included.

The reverse split cam hasnt been fully figured out yet. I think its more of a benefit when running open headers. It would be interesting to see some dyno testing with some 1 7/8" headers on a 346. They might allow the engine to use even bigger reverse splits for more torque and hp. Increasing the overlap might help the exhaust gases draw in more air through the intake.

If your gonna run with cats and through a catback, Id use a single pattern 220 cam with a 114 lsa. Or maybe a 218 222 cam. At this point the exhaust is probably as much of a restriction as the intake. It might be a good idea to take note on how gm designed the latest z06 cam since they designed it for the exhaust restriction in mind. They like little overlap, a lot of advance, along with a much more exhaust duration.