dyno people step inside.....

[dawdaw]

So trying to get the kinks worked out of this things.... the previous owner emailed me the dyno of the car when it was on a mail order tune and it just doesn't look right lol.... what do you guys think? Dyno was a mustang dyno. drivetrain is a th400 and 9 inch...

[96lt1m6]

what componets are in the motor? Is this a larger CI motor?

[dawdaw]

what componets are in the motor? Is this a larger CI motor?

It is a 383. factory ported heads and intake. factory pcm, and HR cam....

[96lt1m6]

best i could suggest is to run the at the track then post the time slips. to make it easy find out what your track elevation is to start with then get the following info-
temp out
humidity
barometric pressure

[Fastbird]

Something is WAY skewed. Those tq numbers should be nowhere near that high on a mustang dyno. Is the car running ok? Track it, get times and trap speeds, forget about dyno numbers (says the resident dyno racer, lol).

[BIG CAT]

doubt it put down 560ft lbs to the tire at 3000. our old combo was a 383 with afr 210's and a t -trim at 12.5 psi put down 610ft lbs at 4100. and that was through a th400 and a 9"

[dawdaw]

doubt it put down 560ft lbs to the tire at 3000. our old combo was a 383 with afr 210's and a t -trim at 12.5 psi put down 610ft lbs at 4100. and that was through a th400 and a 9"

I know the car no doubt isn't making that much torque..... I just don't understand why the graph looks like it does? Is it the converter that would cause a skewed torque reading like that?

[joelster]

doubt it put down 560ft lbs to the tire at 3000. our old combo was a 383 with afr 210's and a t -trim at 12.5 psi put down 610ft lbs at 4100. and that was through a th400 and a 9"

I've seen dyno's where it does this. We have a local dyno that reads the torque super high on the initial hit. I'm not sure if there is a way for the dyno operator to account for it or if the dyno has a hard time reacting to the converter spike. The funny thing is these guys go from this dyno (a dynomite) over to the dynojet at New Era and get all heartbroken, lol.

[dawdaw]

Something is WAY skewed. Those tqnumbers should be nowhere near that high on a mustang dyno. Is the car runningok? Track it, get times and trap speeds, forget about dyno numbers (says theresident dyno racer, lol).


Yes the car runs ok.... the tuning is pretty far off right now (afr is in the10.2-10.8ish, and has very little timing in it....), so I haven't even beendriving the car cause I don't want to wash the rings out..... the guy thattuned my car screwed it up bigtime. I contacted Moe bailey on here and he hasbeen helping me out... I just got my tuning software yesterday and trying toget things straightened out on it.... the car right now is running 7.40's inthe eighth trapping 91 so I'm expecting to see some pretty decent gains onethis motor gets leaned out and the timing gets put back in it..... I'm justtrying to understand why it has such a spike in torque and just drops off.... Afew people that I've showed it too seem to think it could be a flashing convertermaybe?

[dawdaw]

I've seen dyno's where it does this. We have a local dyno that reads the torque super high on the initial hit. I'm not sure if there is a way for the dyno operator to account for it or if the dyno has a hard time reacting to the converter spike. The funny thing is these guys go from this dyno (a dynomite) over to the dynojet at New Era and get all heartbroken, lol.

Lol the only thing that gets me is the thing's torque just drops and keeps dropping lol... I've never seen a dyno sheet that looks like this, that's why i'm trying get some opinions on what it may be... Maybe because it's an lt1 lmao

[BIG CAT]

I've seen dyno's where it does this. We have a local dyno that reads the torque super high on the initial hit. I'm not sure if there is a way for the dyno operator to account for it or if the dyno has a hard time reacting to the converter spike. The funny thing is these guys go from this dyno (a dynomite) over to the dynojet at New Era and get all heartbroken, lol.

lol i have heard a several of dyno operators tell me i should have went to a 12 bolt and a pg so it would show more power.:whistle:
last time i hit the rollers was in tn just before the shoot out. when he hit the throttle the dyno freaked out. we had to move the computer as far away from the exhaust as we could and still could not get a clean graph. it would shoot up to 770 range then drop then shoot back up.

[dawdaw]

So any ideas on why the torque is so screwed up on this graph???