JamesDean

I just want an idea of what gains if any I can expect from a 298cu in displacement short block with 2-Valve 18cc - 9.6:1 Compression Stroker Shortblock. It will have dished pistons.

Car 2003 Mustang GT (manually shifted)

Current mod list.
1. K&N Cold Air Intake
2. Accufab Plenum and Throttle body
3. .500 Valve Lift Comp Cams
4. CNC Ported Cylinder Heads
5. Steeda Under drive Pulleys
6. Rotating Assembly
7. BBK Long Tube Headers
8. BBk H-pipe
9. Magna Flow Cat back
10. 3:73 rear end gears
11. Steeda Upper and Lower Control Arms
12. Adjustable Rear Shocks
13. 117x10.5 rear wheels
14. 315/35/17 rear Ties
15. Steeda Triax shifter
16. Rebuilt T3650
17. 11” clutch

Current HP: 325
Current Torque: 330

JamesDean

I need a new shortblock and I have already purchased this one, as advised by a mechanic who works only on mustangs and understands my goals, wants and needs for this car, because I ruined my crankshaft at the track. Although my mechanic is still figuring out exactly what happened.

SVTeeshirt

im gonna say probably around 10whp, no more than 20whp, but i doubt you will see close to 20whp.

WhiteFoxGT

Maybe I missed it, but are you still running stock heads? Id slap some trickflows on there and youd be near 375 wheel man

SVTeeshirt

he has them listed as CNC ported cylinder heads so im guessing hes just got the stock P.I heads ported.

I'd like to see trickflow heads too.

JamesDean

Thanks for the info. As far as the heads go I went with someone's advice and I am happy with the performance. My reasons for every decision in my car are mostly because its a daily driver (except in the winter) and at the time of the heads I was not planning on replacing the rotating assembly because I did not have any more money to spend and I was a little impatient. However something happened with the crankshaft and it broke and I wish I would have gone with a bigger cam and heads. But I can't undo the past so I'm happy with what I have. In the future I plan to boost my car and I hope to do that with a turbo. But for now I have spent far to much money and it will be some time before I can spend more.

JamesDean

Unless someone wants to just give me some cylinder heads or any other parts for that matter I'm stopping here for a while. lol

mustangmancp

As said eariler no more then 15-20 hp. And ik what you're talkin about. My cars been down for almost a month now and i wish i woulda just saved my $$ and got some MHS stage 3 heads and a bigger cam.

teej281

^Why your car been down for over a month?! BTW, check out my sig

Mustang_NTriangle

How did you ruin your crankshaft??? Are your heads still good?