Dyno...Whats up????? Rwhp???

[420nitro]

Originally posted by Hethj7
I don't notice it a whole lot, but it seems like it is just another form of "bench racing". Some can do it intelligently, and others don't know what they are talking about.

Also, explain to me why a car with a high stall converter would show less power? Once that thing is spun up, it shouldn't matter. I could see where it may effect an average hp reading, but peak hp shouldn't change, right ?

Not to sound stupid but the article to back up my statement is misplaced. When I find it I can send you the info and magizine article. It was in Muscle Mustangs and Fast Fords, under thunder mail. Don't recall which issue, but basically, yes the loose converter causes slippage which will not show the same amount of power as if it was a 5-speed. It is also true that a automatic transmission eats more power then a 5-speed, but we are talking more then that. It seems that when you put a loose converter in a car,you loss pwr according to the dyno, but you didin't, and it proves it when you go to the track. That artice in MM&FF shows a race car that made 420 RWHP but yet blew off a low 10 sec pass. The article then tryed to find out what happen, because the car should have gone alot slower. According to the article they were missing approx. 70-80 horsepower, but ET did not show any loss what so ever. They concluded that it was the converter.
Like I mentioned before, the dyno is an awsome tool for reference use only. Its not to compare with other cars,... well to a point I guess.
If itsany help my first combo was a GT-40 package from Anderson Motorsports. GT-40 heads, Gt-40intake. E-303, Mac 1 5/8 full length hearders, 2 1/2 off-road h-pipe, Flow-masters, 4.10 gears, and a Tremic Transmission 3550. The car made 268 rwhp at the same dyno shop. Car went as follows on average.
60 foot 1.71-----1.76
1/8 mile 8.0's-----88
1/4 mile 12.50's---107
Now I dont know if maybe the shop I went to was calibrated differntly or what, but all the race cars that had race prepped transmissions that made anywhere close to 500 rwhp were all solid 9 sec cars that weighed close to 3000 pounds.