Grims

I have LT headers going to a open Y pipe with 1.6 rockers, and a cold air intake. New opti and all the free mods. (ported MAF, throttle body by pass, ect) with a pretty advanced timing tune.

this is what the car did on motor.
http://img211.imageshack.us/my.php?i...nomotor4pk.jpg

People in the lounge are saying something must be off. I made 3 pulls with the same results each time. My 2 friends both dynoed and hit what they should of for their mods. (actually they were a little disappointed)

So what do you guys think, is that what the car has...or is something wrong with that dyno?

Joe 1320

I can tell you from experience that all motors are not created equal. In every production run there will be collective tolerances that make some motors weak, some average and some strong. Heck, there are guys getting some impressive numbers rebuilding within "stock" guidelines using tricks life offset grinding of the crank, blueprinting, etc. I think it's entirely possible. The previous owner may have even done headwork that you weren't aware off.

sabre81

With REALLY generous math, you could stretch and say maybe 315rwhp. To me, it seems high.

Chrisbequick

That's about right for just exhaust, cold air and tune. What were you wanting, 400 at the tire?

-Chris

Javier97Z28

You need to back this thread up with the other info you're posting in the lounge as well.

Your car has trapped 114 on a 150 shot.. which you say is more like a 100 shot b/c of how you have it jetted.

That would place your 336 rwhp car trapping 104 rwhp on motor. Doesn't add up. Even slightly ****ty driving and a bad 60' in an M6 shouldn't be that low...

As I stated in the lounge.. with bolt ons previously, my car trapped 104 with 272 rwhp under my A4, added a cam, around 330 rwhp now, traps 111-112 with great consistency.

If you had 336 rwhp, added a 150 shot, your trap speeds should be in the 120's.

Grims

No, people think thats to high.

Everytime I have broguht my car to the track it has had a lot of problems, slipping traney, slipping clutch, high rpms misses, failing opti, bad torque arm.

After fixing all of those problems is when I had it dynoed. I will take the car to the track again this weekend and get a motor, and a nitrous mph and see how things add up.

Also please remember, because of the lack of any saftey equipment what so ever on the nitrous, I use it very carefully. Engage it mid second gear, let off of it at least half a second before I shift, and rengage it at least half a second after.

So you do the math on how many seconds I was with out the extra power and figure out how much over all horse power that really was.

Josh'95Z28conv

Hey, Ill be going to the track one week from today. Im waiting on valve springs to finish my cam swap, and Im having it dyno tuned by corey henderson next friday. I will then take it straight to the track. You should go the same night

Oh, and where did you have it dyno'd?

Grims

Corey's lol

FastZinTennessee

There's no way with just bolt-ons it put that down. Either the dyno is off or the previous owner put a few things under the hood that you don't know about.

Loadre

Are the numbers SAE or STD?

Josh'95Z28conv

All the dyno pulls Ive had with corey, the #'s given are SAE. His dyno is almost brand new. I helped break it in on the first day It is the same dyno that said I put down 295RWHP with full bolt on's through a 6spd.

Id say the previous owner did a cam swap, and/or mild head work

Grims

I would agree, but the car was as stock as it gets when I bought it, all the way down to stock clutch and sparkplugs.

Grims

Lets meet up at the track next weekend.

HardcoreRM125

Different dyno's put down different numbers. Different cars put down different numbers. My car runs strong for an LT1 car. Its a heavy *** convertible, with just bolt ons and my friends grand sport only gets me by 2-3 car lengths from a dig to 100.

If you figured even a 3% car to car variation, and a 3% dyno to dyno variation, that could be off by as much as 5 or 6% at the wheels. On a 300+ RWHP motor, that can add up. Variation could CAUSE up to a 30HP variation between comparable cars in similar tune/condition. And variation from dyno to dyno ... It seems reasonsable to me that he could dyno that high. Afterall, some M6 cars put down 260+ bone stock at the wheels. And he does have a tune for it.

Also, there's guys on here that get dynoed with the hot cam kit and dont dyno that well. So much of it is in the tune. That and the fact that different dynos put down different numbers. The fact that his friends put down reasonable numbers makes me think its a strong car.

Also, what are the chances that a previous ower put a cam in, or did head work. Seems pretty slim to me if he was the one that did all the other bolt ons. No one would cam an LT1 without a CAI, headers, RR's first. It just wouldnt make any sense.

HardcoreRM125

It wont load the picture for me of the dyno graph. Take a look at it though. A stock LT1 makes peak power at about 5200 RPMs. Headers, CAI, and RR's would bump that peak power range to around 5600-5700RPMs Even with the Hot Cam, peak poweer would be at at least 5800 RPM's.