dyno results

[whtturbot]

Well I had my 87 T on the rollers today. The air was not all that great so I really did not expect much. After much trial and error I finally figured how to get a good pull on the dam thing. I made a total of 6 pulls. The best #'s were 454 hp with 575 ft. pounds of torque. The boost was set at 28 pounds. The air fuel was at 12:1
I was using a switch to lock the converter on all the runs. It was interesting to see the car peaked HP at 4800. I did not fool with the DFI in terms of fuel or spark, just fooled with fuel pressure. So it gets me to thinking that with some better air and some tuning of the DFI maybe 475 HP is possible !

Jeff C
87 T

stock short block, main studs, head studs with steel shim head gaskets, 212 comp cam, home ported heads(stock valves) ported intake, pte plenum, cas stock mount intercooler, 50 pound injectors, 52 turbo, DFI, 3" single shot exhaust

 

[salvageV6]

Wow, nice job.

 

[Chris Taylor]

Good power, with more to come.

When we went to the dyno a few weeks ago the air temp. in the dyno room was over 100*. Air temp. going into the motor was over 115*.

I feel sure you will see gains with cooler weather.

 

[whtturbot]

Thanks for the replies fellas (salvagev6, chris t. ) Iam hoping to get it to the track again soon, maybe ill put it up on the roller one more time before I race it. I was only running 19 deg of timing with 110 fuel so im thinking a few more degrees timing are in order. Im still hoping to pull 475 hp out of it.




Jeff C
87 T

 

[87gnNV]

WOW nice numbers Jeff .

 

[topfuel]

454 with 575

Nice numbers
If your HP peaks at 4800, is that the ideal 1-2 and 2-3 upshift
point?
Mine peaks around that rpm too, but my trans will upshift
somewhere around 5100 or so, on the downside of the
horsepower curve.
I know these trannies do a great job shifting on their own,
but I wonder if I should try manually upshifting it before it goes
"over the hill"

 

[87gnNV]

i dont think manually shifting would help beouse if u shift the lever at 4800 it would still shift at 5300. I think we can adjust our TV cable and that would change the shift poiints. i dont know how but maybe someone can chime in. Maybe they even have the answer at www.gnttype.org

 

[WarpSpeed]

It may not make that much difference,, shift points that is. I mean how much less HP are you showing at 4700 or 4500rpm? And how fast will it drop off after 4800rpm? Plus, were is peak torque?
Good numbers though, any chance you can post a graph or list some numbers at various rpms?

 

[Boston GN]

Very nice numbers...what TC are you running?

 

[Ed Valvo]

I think you're over 475 in reality because the dyno doesn't simulate conditions of going down the track. IC fan on the dyno is no match for the rush of air going through the grille during a run which might make your IC work better. I could be wrong. Nice dyno numbers!

 

[whtturbot]

I do not have a scanner so ill just give a quick rpm/hp breakdown.

barometric pressure was 28.9 Hg
Intake air tem 93* F


RPM HP TORQUE

3400 201 311
3500 233 350
3600 273 398
3700 314 446
3800 368 509
3900 415 559
4000 438 575
4100 446 571
4200 448 560
4300 449 548
4400 454 541
4500 453 529
4600 450 514
4700 444 496
4800 439 481
4900 436 468
5000 436 458
5100 436 449
5200 436 441
5300 434 430

Im running a vigilante 3400 lock up converter.


Jeff C
87 T

 

[Sweet6]

What kind of dyno was it? A dyno jet? The reason I am asking is because I am curious if the air/fuel ratio varies by dyno. Not sure why it would, but I had my car dynoed on a Dyno Jet and the guy said 13.5 was the ideal ratio. I picked up 10 hp going from 14.5 to 13.5. Just curious to see if I could have picked up more HP with more fuel.

TIA

 

[whtturbot]

The pulls were made on a dyno jet.





Jeff C
87 T