Chicago Crew UnderBoss

iTrader: (1)

Just got this thread off the corvette forum on this monster 440 cubed LS6 motor (set up for nitrous) which pulled 701 ponies at the crank on motor, and is expected to pull 1000 crank horsepower on the SPRAY. Motor was built for West Coast Corvette and utilizes C5R Heads. Enjoy!

http://forums.corvetteforum.com/zerothread?id=535142

MTI 427 C5 Roadster <img border="0" alt="[USA]" title="" src="graemlins/patriot.gif" /> <img border="0" alt="[driving]" title="" src="graemlins/gr_driving3.gif" /> <img border="0" alt="[USA]" title="" src="graemlins/patriot.gif" />

<small>[ April 10, 2003, 09:12 PM: Message edited by: MTI 427 C5 Roadster ]</small>

VINCE

iTrader: (1)

Wow!!!!

Y2K_WS6_T/A

Good numbers, but it's not that impressing considering what intake and heads it has. What is 701 Crank HP when converted to Rear Wheel HP in a Y-body (A4/M6)? Some big inch LS1 Based motors(read LS1/LS6 Intake and Heads) make over 525rwhp.


NO FLAME, just my thoughts.

Nickn20

6 speed car that would equal 595 rwhp, lol 15 percent drivetrain loss

automatic is 560 rwhp, that is awesome dude! 20 percent loss.

oOoLy

Awesome numbers <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

Got Me SOM

iTrader: (2)

wow nice, you can probably set that up for boost too.

verbs

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Got Me SOM:
<strong> wow nice, you can probably set that up for boost too. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Even with C5R heads? Don't those make the compression stupid high like 15:1? I don't think its possible to lower compression enough for boost.

Quickin

Can't really be called an LS6 with C5R heads, right????

Quickin

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Y2K_WS6_T/A:
<strong> Some big inch LS1 Based motors(read LS1/LS6 Intake and Heads) make over 525rwhp.
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I'm hoping to have more than that when i get tuned next month. And it idles like stock.

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

Mike K.

That was a good read, real good power N/A

masterdill

iTrader: (2)

They used block P/N 12480030 which is the C5-R block which costs 6g.

I wish people would look into things before wetting their pants. <img border="0" alt="[bang head]" title="" src="graemlins/gr_banghead.gif" />

Y2K_WS6_T/A

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Quickin:
<strong>I'm hoping to have more than that when i get tuned next month. And it idles like stock.

<img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">You have the ARE 436 correct?

robertbartsch

Hey:
Is this really THAT impressive? OK so these are some awsome numbers ....but what about the days-of-old?

It is general knowledge that the 426 Hemis made over 650HP although the published numbers are much less due to high insurance rates that made manufacturors lie about true power ...and this power was with those old carberator things and iron heads and blocks....

...did anyone notice that Mercedes is bringing back the hemi in their pickup trucks this year? ...the units are 350CU and produce like 375HP....LOOK OUT GEN IIIs.... ...the Bee-Mutt-WWs also produce 400HP at the real wheels right out-of-the-box....so here we go again!

Quickin

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Y2K_WS6_T/A:
<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 Quickin:
<strong>I'm hoping to have more than that when i get tuned next month. And it idles like stock.

<img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">You have the ARE 436 correct? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">YES.
It pulled 485 @ 5,000, untuned with a slipping converter at 3,600. From what people have told me, I should get about 40-50 from a good tune. My fuel is rich at about -10. A friend ATAP'ed it Saturday and said it's way out of wack. So, i hope the tuner people are right. That would put it somewhere around 550 with a full pull, right?

Got Me SOM

iTrader: (2)

what's your peak power gonna be at?


How are C5R heads different?

550 sounds a bit optimistic but what the hell do I know.

Quickin

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Got Me SOM:
<strong> what's your peak power gonna be at?


How are C5R heads different?

550 sounds a bit optimistic but what the hell do I know. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I can only guess around 6,400 rpm. Another ARE 436 owner with a smaller cam than I have and lower compression dyno'ed 500@6,400 and 505TQ.
His RWHP was at 453 at the 5,000rpm point, I was pulling 485 at the 5,000rpm point UNTUNED with 13psi of fuel pressure loss at that point <img border="0" alt="[evil]" title="" src="graemlins/gr_devil.gif" /> 32 RWHP more than his. The reason I never got a full pull was due to the factory fuel pump dying by 5,000rpm. I'm having the Racetronix set-up installed this week, then going back to Norris Motorsports to get tuned up.

So I'm just going by what people have told me, that I should get 40-50 from a good tune considering how horrible I'm tuned right now. If I stay about 32 RWHP ahead with a full pull, then I would have 532 RWHP untuned at 6,400 or so, right??? I mean, I have raw fuel shooting out of my pipes 6 feet and landing on the ground when I rev it in "park".

I hope everyone is right, 550 RWHP would be the ****. But I'd be damn happy with 500. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

C5R heads????? A C5R block offers ZERO power gains over an LS1/LS6 block, NOTHING. It just allows you piece of mind if it needs re-sleeving.
The C5R heads, on the other hand, are a completely different animal. They ROCK!!! But than the motor is no longer an LS1/LS6. I was going to use the C5R block for my motor, but everyone told me I'd be wasting my cash.
Although it would be nice to have one.

<small>[ April 14, 2003, 07:54 PM: Message edited by: Quickin ]</small>

Chicago Crew UnderBoss

iTrader: (1)

MASTERDILL:

Who's wetting their pants? This was posted by me for the simple reason that this articles makes for an interesting read and would probably interest many here who are into high horespower LS6/LS1 engines. Nothing more nothing less than that. <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />

HP-GURU

With a C5R head 800-900N/A HP should be possible.

WIth the serious ported LS6 heads 650-700HP N/A should be possible.

Quickin

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by masterdill:
<strong> They used block P/N 12480030 which is the C5-R block which costs 6g.

I wish people would look into things before wetting their pants. <img border="0" alt="[bang head]" title="" src="graemlins/gr_banghead.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">What does using the C5R block PN 12480030 have to do with anything????
The block has ABSOLUTELY NOTHING to do with the power it has made.
The HEADS and INTAKE are the whole trick with that set-up. C/R helps to. C5R blocks offer ZERO power gains over a regular LS1/LS6 block.

JEEEEESH!!! <img border="0" alt="[bang head]" title="" src="graemlins/gr_banghead.gif" />

<small>[ April 15, 2003, 04:38 PM: Message edited by: Quickin ]</small>

HP-GURU

The C5R head is a large valve, raised intake port head with revised valve angles and positions.

The intake port ported can flow up and around 400CFM.

This is enough to make 800-850HP N/A. Of course it takes RPM and an intake manifold which supports power at high RPM to make this type of power.