Justin00Stang

This are some dyno results from my wife's car. It ended up running 12.5@110, there is a ton more left in it.

This was on race fuel. The car makes around 365-370rwhp on 93 pump gas...I can't run any timing at all up top with 15psi and pump gas. When the race season is up we'll probably go back to a 2.87 pulley, as this 2.62 is kind of crazy. I'm intentionally not running it past 6k, even though power keeps climbing.


We put the dual exhaust on last week, and I'm not sure it really made a difference. I think the restriction is somewhere else. Remember this car made 350rwhp with a 2.87 pulley (13psi) and single exh with a GT muffler, on pump gas. To pick up 20rwhp from a smaller pulley on pump gas (about 2psi more) and dual exhaust is nothing. I think the cats or headers are holding it back.

beaustang

It doesn't look like spinning it past 6k would do you any good anyway; torque levels off and starts to drop at 5k so why push it? Great numbers though and I'm sure with the proper suspension and a good launch you'll get it into the low 12's / high 11's. Congrats!

A_Sixer

Awesome numbers Justin!!!!

tyzorg

Can you list what products you used to get to the near-400whp mark? ive been looking for a long time for a supercharger kit that got near 400whp but I thought the only option was turbocharging, I had to do a double-take when you said it was a 4.0 so what was your secret? please let me know, I would greatly appreciate it.

Derf00

Have you had your heads ported/polished? The exhaust ports are usually a big restriction. Since you're at that HP and TQ figure I'd have the intake ports ported and polished too. Also, I noticed your A/F at close to redline really spikes.

amptor

How's the fuel economy or is this not driven often?

Justin00Stang

With my tune, 24mpg highway, 19-21mpg city/highway mix. It's driven about 300 miles/week. I think the mileage is pretty good considering how hard the blower is being spun while driving down the highway at 2500rpm.

Justin00Stang

The entire engine is stock, from heads to bottom end.

That A/F spike is the engine turning off when it approaches the rev limiter, completely normal.

tyzorg

If the engine is completely stock how did you get a S/c to get it to 400whp without blowing?

chrisc

good tunes my friend. also, i would bet that he never gets on the boost until on the dyno or track