Chiung,

Those two pulls like REAL consistant.(Insert sarcasm) Somehow you just magically picked up 18 ft/lbs. of torque on the second pull?

How can a Vette put down 330RWTQ with only 222RWHP? Please explain.

 

Honda606,

I don't know why the pulls have such different peak torque numbers. It was my first (and only) time near a dyno, and I wasn't "driving" the car. The pulls were made within 1/2 hour or so of each other. Maybe the first run was a warm up? I do not claim to be an expert, but I knew my vette well, and I know that it made the numbers.

I don't know why one pull was different from the other, but if your sarcasm is meant to insinuate that there is something bogus about the pulls, the numbers, or the car, then you would appear to me have a strong (but erroneous) pre-conceived notion of what C4 and C5's are putting down. So strong does your bias appear that you would question objective evidence and the many posts of those who have experienced the torque of Corvettes, rather than accept that the evidence indicates that your Z was weak. If so, then I will have no more part in your education.

But, to give you the benefit of the doubt, I will attempt to answer your question about the torque vs. horsepower numbers, by referring you here

http://www.off-road.com/hummer/tech/power.html

for an informative article, from which I quote, "Torque and horsepower are very closely related. We can see that a high revving motor does not need to produce much torque to get lots of horsepower. Similarly, a high torque engine may not develop lots of horsepower."

Once you have read the article and educated yourself, you should be able to answer your question, as well as these:

How can an S2000 motor put out 240HP with only 154TQ?

How can a Dodge pickup motor put out 460TQ with only 250HP?

 

Um, L98's put out great torque well over 300lb/ft and low 200's for horsepower when they're close to stock. I do not doubt for a second the numbers Chuing posted. The ECM learns after each dyno pull, I've picked up over a dozen lb/ft of torque and over 20hp with 3 consecutive dyno pulls. The computer was backing timing off on the first dyno pull, the second pull it advanced some more, and the final run, it had fully advanced the timing. Going from closed loop to open loop takes a few runs and that was what Chuing's car was doing.

Torque is name of the game with the old L98 cars, locomotive thrust at low rpm, but they choke pretty bad as you wind it out.

 

[QUOTE]Originally posted by gabedude
[B]

I have yet to see any bone stock C5 trap 110.

 

WHAT??

So are you telling us that all we have to do is go throw any car on a dyno and it magically picks up extra horsepower and torque?? What the heck was I thinking about slapping on a supercharger, I'll just go and have my car dynoed fifty times. That should be good for an extra 100 of each I assume. Well...off to the dyno.

 

606,

You're not the brightest guy, are you? A good PCM has a nice history in it's long-term memory. Most newer cars have this. If you cruise over to the dyno, putzing the whole way and strap it to the dyno and go WOT, the computer will start in closed-loop mode and retard timing, atleast on the C5's. The PCM learns from one run to the next (WITHIN A CERTAIN LIMIT AND UP TO A CERTAIN POINT!!!!)

I specifically remember making a dyno run a while back, where I made the mistake of cruising over to the dyno and strapping it down. First pull was 302rwhp, second was 320rwhp and third was 334rwhp. The guy plugged a GM tech tool and noticed I was picking up a TON of knock retard the first pull, the second pull I had 6 degrees, and the third run was 0 KR. The PCM was detecting false knock on the first two runs.

Spank your S2000 through the gears after cruising around gently for 20 minutes. Then slow back down and run through the gears again. There is a good chance, the second run will be a bit quicker.

 

That's sad. I never ran stock, but I hit 112mph with just an intake and cat-back. I have a six-speed. This was on the crappy Goodyear runflat stock tires too.

 

[QUOTE]Originally posted by QUIKAG
[B]606,

You're not the brightest guy, are you?

 

Why is it that Mustang and LS1 owners, or domestic muscle car owners in general, think they know everything about any car engine based on their experience, or lack thereof, with their own?

Oh wait....they do.

I think I will have to relog on to the dreaded, sappy LS1.com forum to post a link to this thread myself. I am sure everyone there would love to hear that they can pick up close to 30RWHP just by romping on their car a little bit. Also, if you take a look for yourself over there, which I just did, almost everyone's LS1 must be "weak." Almost every sig I looked at had RWHP and RWTQ numbers in the area of 330-340 but, guess what, they all already have airlid, exhaust, filter, TB, and headers. So, I suppose all those mods together are only worth about 1-2 RWHP and TQ on an LS1 since the beast already puts down those numbers stock.

Why do you'll even bother posting here in the first place? Wouldn't you rather hang with your bretheren at the corral.net, ls1tech.com, or the svtforums? What exactly do you have to prove here except for how much you can shovel?

 

Because I'm more of a Honda guy than you are. Did I say that my car was stock? When I dynoed the 330ishrwhp, my best is 337rwhp, BTW, running rich at the big end, I had intake, headers, and cat-back exhaust. The best 'stock' dyno I can recall is in the 320rwhp for an LS1. LS6's put out anywhere from 340-370rwhp depending on year and a few other variables including build tolerances.

My situation is fairly unique, not all cars will pick up that kind of horsepower on a dyno. My car was initially have issues 'adapting.' That is why the dyno operator plugged in a GM tech tool. Most cars will probably dyno within 10hp from their first pull to their last. I was just stating my case because it was very easy for that L98 guy in the posts above to pick up 18rwtq from one pull to the next.

So, I think I recall you have an S/C S2000. I think it's a big waste of money to mod S2000's because they just don't or can't put down the power. Even if you're over 300rwhp, you'd be lucky to run in the 12's, especially without breaking a halfshaft. Pretty sad if you ask me.

Since, my one line response as to why I'm here isn't sufficient for me, I'll elaborate. I've had, oh, about 8 Hondas including a '97 Prelude, a few Civics, a Del Sol, a CBR600F4i, and I have DOZENS of friends who own Preludes and S2000's. I like Honda's in general, I don't own one now, I enjoy hanging out on S2ki.com because in general, they are the most mature Honda owners on the net.

However, there are exceptions and you're one of them, I'm afraid.