Sears

427 LS6 + GWP supercharger

VINCE

iTrader: (1)

Now that is sick... Wow!!!!

MIGHTYMOUSE

iTrader: (59)

uhh.. ok now yes that is a great dyno.. but anybody tell me what the deal was on the track pass with the improved tuning after the dyno??

11.47 @ 122.6 mph <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> 1.6 60'

this should run a 10 coasting after the 1/8th man.

Black LS1 T/A

If he's at the elevation I think he is (5300 to 5700 feet), stock LS1's are doing the quarter mile in 14 and 15 seconds around there. <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />

If I had that kind of mad power here on the East Coast and could hook it up, I'm sure I'd see the 9's easy! <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

<img border="0" alt="[hail]" title="" src="graemlins/gr_hail.gif" /> Great POWER!!! Man! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

MIGHTYMOUSE

iTrader: (59)

well i was thinking that, but from what i could gather the location of the dyno was also way up there (mile high dyno) and thought to be same area as the track.. soo.. it should have had the same power there..

either way, 8psi boost is the same at any altitude... right? you just have more parasitic loss from the blower at higher altitudes because it has to spin faster to gather the thinner air.

Black LS1 T/A

Corrected, the dyno should be comparable, I think.
My car dyno'd within a few RWHP of what GWP's advertised claims were with the Stage II.

I think Clay Loving's Blown 383 with heads/cam and Headers dyno'd nearly 150 RWHP more than my Black Gal, but ran 11.37 @ 119 at 5400'. Mine ran a best of 10.98 @ 126 at Sea Level. (I was averaging 11.2x, 11.1x, etc.)

If Clay's car was here in Raleigh, I have no doubt his 8th mile would have been in the hi-6's and maybe the mid or solid high 10's, for the quarter-mile (IMHO).

It's an established fact... elevation makes a difference in ET and MPH! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

MIGHTYMOUSE

iTrader: (59)

oooh, i didnt read that the 737 was a 'corrected' number. makes sense now.

01 SS Jay

I wonder how that would line up against the LS1motorsports car on equal elevation.

Terry Burger

iTrader: (4)

Again I was excided until I read the dyno numbers are corrected for elevation. Let me guess a 1.3 correction factor? <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Black LS1 T/A

Terry,

That's my guess, I don't know that for sure.

Where you been hidin'? What have you been doing these days?
You still have the same cars and setup?

TrahnZam WS6

That car was originally an NA ARE 422 that made something like 440 rwhp lol.

Terry Burger

iTrader: (4)

Hey.. Not much new with me. I've been playing around with NA cars lately and sold off the turbo/blower projects. I'll probably go that route again at some point in the future though. For now my goal is to get competative in the NA arena. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Mark C

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Terry Burger:
<strong>Again I was excided until I read the dyno numbers are corrected for elevation. Let me guess a 1.3 correction factor? <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Must be something like that. I was trying to guess on this one too. Obviously, thats too much power to make uncorrected. 737 + 50 for the blower + 50 for the drivetrain....that would be 840 at the flywheel. Way more than that intake would support.

Looking at the disparity between torque and horsepower tells me this is not close to the intake limit. Can I play guess the correction factor? I'll say 570 rwhp and 1.29 cf. Anyone else?

Nickn20

another high altitude dyno queen, as soon as the car experiences a DA around sea level the boost will go up. I beleive the car will make that power at 11-12 psi at sea level though.

Nickn20

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by MIGHTYMOUSE:
<strong>well i was thinking that, but from what i could gather the location of the dyno was also way up there (mile high dyno) and thought to be same area as the track.. soo.. it should have had the same power there..

either way, 8psi boost is the same at any altitude... right? you just have more parasitic loss from the blower at higher altitudes because it has to spin faster to gather the thinner air.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">wrong blowers loose boost, turbos can make up for it..... by spinning faster, with a blower you need a pulley change for high atitudes, see my previous post.

MIGHTYMOUSE

iTrader: (59)

oh yea, i forgot that sc's arent cool as turbos' <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

BLOWNMERO

I take all GWP dyno numbers with a grain of salt... actually about half the shakers worth. I remember when they were getting "542" out of a stock motor and 8psi (no headers).

Black LS1 T/A

That's odd.

http://www.goldenwestperformance.com/ls1.htm

- They advertise 400-425 PSI for their Stage I.
Before completing my pulley and injector upgrade, I made 404 RWHP & 425 RWTQ at Sea Level.

- They advertise 475-525 for an F-Body and recommend free-flowing exhaust and aftermarket head/cam.
After putting in my injectors, headers and a pulley swap (no aftermarket heads'cam) running rich, I made 486 RWHP / 487 RWTQ. I know at least two people who are making in excess of 500 RWHP with a GWP Stage II right now.

- When they posted a dyno of a 1998 Trans Am their dyno was in the upper 400's RWHP, from what I recall.
That's right in my neighborhood.

Any wagers on what my Sea Level Dyno will be when I get my GWP 422 in? <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

I'm targetting mid-600's or better. What do you think it'll turn out to be?

Mark C

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Black LS1 T/A:
<strong>
Any wagers on what my Sea Level Dyno will be when I get my GWP 422 in? <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

I'm targetting mid-600's or better. What do you think it'll turn out to be?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Whats the intake? This will be the limiting factor at the power levels that you would see. With a supercharged car, (and I'm making some semi-wild guesses) I would bet the LS1 manifold could get 610 - 620, and the LS6 could get more like 640 - 650 at the wheels. This is maximum, no matter what size engine / compression / boost. If you get something better, and depending on the compression and boost, you're looking at much more.

The issue I had with 737 hp figure is that its misleading. It assumes that everything else could support it. It is the only way to compare altitude cars with others, and it definately gives meaningful information. Its perfect for describing the loss of a sea level car at altitude, but its misleading to go the other way.

Think about this: Assume this car makes 560 actual. What if this car only had a fuel system (pump, injectors, rails or whatever) to support 650 actual? It would never make 737 at sea level. This is similar to the limit of the intake. It will not support power above a given level. I suspect that people will define this limit fairly soon. I was making a guess above. How close do you think I would get. You, Raymer, and Byrne will find it soon enough.

GWP has shown that if all the systems could support the difference in power, the altitude dyno is very accurate in describing the sea level power. Thats why you, and others get what they advertise, and its completely understandable.

Believe me, I'm in a similar position. I'm very interested in Harlan and his modified Holley intake. Based on what people have gotten up to now, I'm pesimistic of the ability of the normal intakes to support beyond my above guesses.

Black LS1 T/A

You're right... I guess we will find out soon enough! Within the next month or so, we ought to be having some rather interesting discussions come out of this quest for more power. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />