Tallon535

Dynoed my car on Saturday and to my surprise it dynoed higher than I thought it would. This was on a Mustang dyno and the tech and shop owner were both surprised at the number considering I only had a cat-back. They said their dyno isn't very nice to most people.

First pull -- 296 (the guy only took it to 5500 rpm)

Second pull -- 302 (again he only went to 5500)

Third pull -- 306 (this time he said, "this thing is still pulling at 5500, I'm gonna take it farther this time")

This is with a 2000 Trans Am 6-speed with 70k miles. The only mod so far is the borla cat-back, which I had the 3/4 open plate in.

I was only expecting about 285. Do these numbers sound about right to you guys? High? Low?

Now I'm looking into an airlid as the next mod. This will be followed by either Kooks or QTP long-tubes and catted y-pipe. Any suggestions as to some other cheap mods I can do?

zamboxl

iTrader: (1)

dude so you got higher than expected, good man don't question it just be proud of it. and go roast some tires.

01TAFlyer

iTrader: (4)

I made 313/332 with a lid and magnaflow through my a4. Your numbers sound right to me. Now go buy a new lid!

goober35

iTrader: (1)

Dont for get to get a ported TB.

cyphur

iTrader: (10)

zamboxl

iTrader: (1)

does that really help out that much how much more will he see??

Turo

iTrader: (23)

numbers look good for a basically stock car with 70k miles

PureWS6

these cars commonly dyno at over 300 RWHP stock.....needless to say the Fbody LS1 was under-rated

NumberOneSled

iTrader: (1)

You might even pick up some more power by ditching the 3/4 plate.

Tallon535

I forgot to mention in the original post and I don't know if you guys noticed my sig, but this was on a four-wheel Mustang dyno. The guy running the shop said that if it had been a dynojet, it probably would have been more like 325-330 hp.

I don't know if you have ever seen the borla plates but the 3/4 plate doesn't look like it's much smaller than the exhaust pipe anyway. I don't imagine I would gain much from leaving the plate totally out.

Thanks for the info guys. I think when it warms up a little bit, I might try to port and polish my throttlebody and maf housing myself. I'd rather spend money right now on getting headers and a y-pipe and a lid than on a throttlebody.

Let me know what you think.

2FAST4U

Another think to keep in mind is how the car is staped down can give another 20hp easy!