Dyno

[GTman85]

Had the Z on the dyno today and was fairly impressed with the outcome. Put down 278 HP and 380 Trq. On a 50 shot was at 315 and just under 425 for torque. Does this sound about right for the car. 140,xxx miles,longtubes,hooker y-pipe,TB, programmer, AFPR, SS hood and ram air intake?

[TheShow50h]

Originally posted by GTman85
Had the Z on the dyno today and was fairly impressed with the outcome. Put down 278 HP and 380 Trq. On a 50 shot was at 315 and just under 425 for torque. Does this sound about right for the car. 140,xxx miles,longtubes,hooker y-pipe,TB, programmer, AFPR, SS hood and ram air intake?

Nice torque! I have no idea on the #'s though .. I would have thought them to be a little higher, what dyno was this on?

[GTman85]

Dyno jet at RaceRelated. I was impressed with the torque but was kinda hoping the Hp was going to be a little higher

[EliteZ]

only 278 without NOS? I thought it had about 285 stock?!!

[GTman85]

LT1 is only 275 stock to the crank. So do the math. 141.xxx mile and basic bolt-ons. Im happy. Look at the torwue though

[Tom N]

What was the A/F ratio.
Is the car running really rich.
There is like a 100 more lb ft of torque over HP.
That just doesnt look right.
Is the car a automatic?

[GTman85]

Air/fuel was at 12.41, so a little lean. Car went only a little lean when i sprayed. So for now ive added a bigger fuel jet and changed plugs. The car is a 6-speed

[gator]

this is a dry nos kit right? if so, those numbers were right on par, esp if you dont have a bottle heater to get the pressure up to 1100 psi

[GTman85]

This is a NOS wet kit. No bottle warmer. I sat in the back of the car with a heat gun getting pressure while James at RR made my pulls

[gator]

1) thats ghetto and not really that smart
2) i am sure your bottle pressure wasnt that high. wet likes 1200 psi.

[formula69]

what jets are you running for n2o and fuel?

[s10_male]

Originally posted by Quickdomesticracer
only 278 without NOS? I thought it had about 285 stock?!!

96 model rolled out with 285- thats pretty damn good numbers with the kind of miles and no upgrades

[TheShow50h]

Originally posted by Quickdomesticracer
only 278 without NOS? I thought it had about 285 stock?!!

You can figure about a 15-17% drivetrain loss from the flywheel to the rear wheels.

Figuring a 16% loss on gtman's car that would equate to 322hp at the crank. 40hp from those mods is very reasonable especially with the high mileage.

[myltwon]

6 speed lt1's dyno around 250-256

so exhaust/intake sounds bout right

you gained alot of torque wtf did you get your peak powers at?

[GTman85]

Originally posted by gator
1) thats ghetto and not really that smart
2) i am sure your bottle pressure wasnt that high. wet likes 1200 psi.

ok.....Well it was the only thing we could do to get pressure. cant afford for a bottle heater at the moment. 19 yr old kid with a decent car,bills and court fees kinda take away my money. Im not sure on the peak power rpm. Ill have to look at the sheet. Formula ill check. I know fuel solenoid is a .28. Was .22 but upped it alittle. Will check the nitrous

[BlackZ28]

i got a stock '96 6-speed and i put down 265 hp and 305 tq. your hp is kinda low, especially with longtubes, but your tq is really high. i would of guessed the opposite with the longtubes...get your pcm reprogrammed. your a/f is lean, and if u want to continue using N20, i would suggest getting more fuel before it goes boom

[obrien2]

Very nice numbers man. Glad to hear your n2o kit is working pretty good for you. You should get over to Revxtreme and have jeremy tune that thing for you.

[myltwon]

Originally posted by BlackZ28
i got a stock '96 6-speed and i put down 265 hp and 305 tq. your hp is kinda low, especially with longtubes, but your tq is really high. i would of guessed the opposite with the longtubes...get your pcm reprogrammed. your a/f is lean, and if u want to continue using N20, i would suggest getting more fuel before it goes boom

he has a 94, all 93-95 were rated at 275 vs 96-97 rated at 285

so technically there should be roughly a 10 hp difference between you 2

[GTman85]

Air fuel was at 12.4. So it was al little lean

[gator]

12.4/1 isnt lean at all. esp if those readings were through the tailpipe and you have cats.

[TheShow50h]

From what I hear RR's dyno reads slightly leaner than it actually is.

12.4:1 is perfect. I'd consider that a little rich on an n/a tune.

[GTman85]

I wonder why im getting a fuel cut. Or what kinda cut. Could it be plugs, fuel pressure what? Its at 5,000 rpm at WOT

[Sneakin Deacon]

i have a 93, and dynoed 260/300 bone stock. with 150k...and that torque number seems really high. but for comparison, bone stock w/ 75 shot jetting, i put down 322/375, 125shot did 364/419

[GTman85]

Originally posted by Sneakin Deacon
i have a 93, and dynoed 260/300 bone stock. with 150k...and that torque number seems really high. but for comparison, bone stock w/ 75 shot jetting, i put down 322/375, 125shot did 364/419

High even with basic mods that ive got? Oh well tonight the fuel pump went. Key on, no reading to the gauge and i couldnt here the pump running. Dont know if thats why i was getting a cut. Maybe it was gonig bad :dunno: Would stock replacement be ok or would it be wise to upgrade? I guess i know the answer to that but will a stock 1 hold the power

[Sneakin Deacon]

no, stock wont hold it. mod cheap, mod twice. you can get a racetronix fuel pump setup from RevXtreme i believe. its what i have. 255lph HP walbro and rewire...

[GTman85]

Originally posted by Sneakin Deacon
no, stock wont hold it. mod cheap, mod twice. you can get a racetronix fuel pump setup from RevXtreme i believe. its what i have. 255lph HP walbro and rewire...

How much am i looking at for a decent upgrade on fuel pump?

[69 Mach 1]

toque>horsepower
no argument

[Sneakin Deacon]

i paid ~245 for the racetronix kit, the walbro itself, i believe, is around 130

[B4C]

GTMan,
The TQ #s are incredible. My '94 went 265hp/310tq with the same mods except the longtubes. I wasn't too pleased, so I corrected that problem.

[GTman85]

GTMan,
The TQ #s are incredible. My '94 went 265hp/310tq with the same mods except the longtubes. I wasn't too pleased, so I corrected that problem.

I was very pleasesd woth the TQ #'s too. On and off the spray. HP was a little low in my eyes but expect the unexpected i guess. Fuel pump goes in today and a 75 shot too. THen to James at RR for another baseline on the 75

[96Z28]

Nice TQ numbers. They seem a bit high with those mods, but take what you can get.

With the LT4 setup I had, LT's, TB, ported heads and intake I only put down 356 TQ. HP looks about right with that high of a milage engine.

I am impressed.

[TheShow50h]

I was very pleasesd woth the TQ #'s too. On and off the spray. HP was a little low in my eyes but expect the unexpected i guess. Fuel pump goes in today and a 75 shot too. THen to James at RR for another baseline on the 75

Now that I think about it when my bro had his sprayed sn95 on RR's dyno it spiked a couple times and read 700 some odd lbft of torque when he was only making about 400.

[GTman85]

Ya mine spiked and went to 596 TQ. So i just made another pull on the spray