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11-28-2014
How does a GTP run about a second faster than a GT with only 40 more HP? I've always wondered this. I mean 40 HP isnt very much. IDK of any car that picks up at least a second in the 1/4 mile with only 40 more HP. Sorry if this is a dumb question. The Moonshine made me do it. Expect more stupid questions from me as the night goes on.
11-28-2014
HP isn't everything.... the L67 makes ~80 ft/lbs more torque as well.
Torque gets you going.... power keeps you going. Hence the significant difference in the quarter mile.
11-28-2014
50 more torque not 80
11-28-2014
Forced induction aswell. Superchargers don't have lag, they give all the power right away. A 3.8 N/A's powerband is alot different than the supercharged cars.
11-30-2014
cuz GTP's are race kars.
11-30-2014
specsOriginally Posted by Grimsin
na l36 200/225
sc l67 240/280
http://thepontiacgtppage.com/enginespecs.html
11-30-2014
My apologies i was 5 off...lol
11-30-2014
what? 5 means ALOT in the quarter!.......
11-30-2014
hp sells cars....... tq wins races!
11-30-2014
while we are on the subject of GTP vs GT, anybody want to guess at the hp/tq numbers for a L26 with cai, hv3, er rockers, plog, overkill pcm tune?
11-30-2014
ill guess, 20 hp over stock, maybe.
na engines dont respond to mods like a blower engine does.
one guy modded up a na engine, cam and all, he was very let down at the dyno.
11-30-2014
depending on the weight!!!!..... LOL go ask the Honda guys vs some fat heavy pig say like a dodge challenger for example!
12-01-2014
With just a few bolt ons (gutted airbox, 3" catless dp, tstat, powrtuned, basic race prep, little stuffs) my '99 GT would run consistent 15.2's @ 90/91 at the track. Not too far off from a stock GTP (14.8's @ 93). Mod for mod there's no comparing na to fi, though, naturally. Was a 3400 lb race weight, as well (coupe with 1/8 tank of gas and spare/jack removed)
12-02-2014
Also, don't forget that you have to think in terms of the torque curve, not just peak torque. You could have two cars with the same peak torque, but the one with the broader torque curve will win drag races every time.
Superchargers do a great job at giving a nice broad torque curve.
-BC
12-02-2014
It's the gearing as well.
Plays quite the factor.
Maybe 180/200?
My buddy's GT2 cam/exhaust/bolt-ons N/A car made 202/220 to the tire.
12-02-2014
Unfortunately, these motors are boat anchors without forced induction. I think the record for an NA 3800 was 270 something wheel. Which is... awful. They just don't flow very well and there isn't much displacement.
12-04-2014
There was a 2000 or so model N/A GT in an older issue of GM High Tech Performance magazine that ran a 13.9 at I believe 98 MPH. Boltons, heads/cam car. IDK what else. Probably some weight reduction too.
12-04-2014
If you took physics / calculus, think about integrating the area under the torque curve. Flatter torque curve = faster ET because so much more area under the curve.
That's how I got my 4300# Buick with 2.56 rearend ratio to run 11.6 in the 1/4 mile on street tires. The peak torque / HP numbers wouldn't blow your mind, but my torque curve was beautifully flat.
-Bob C.
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