Anyone running 10.5:1 compression 2003 Mustang gt daily

dblundell34 · Nov 9, 2016

2003 Mustang gt coupe Manuel trans

Anyone around here running that kind of compression as their daily? Or similar set up as. This? Numbers? Dyno, track, etc.

78mm BBK throttle body/plenum
Professional products intake manifold
TFS HEADS (Not sure which ones yet, car is still in shop)
Xe278ah comp cams
BBK ceramic long tube headers
Grantinelli Motorsport tubeular k member w/ A-arms, adjustable coil overs
24lb injectors (builder claims to have a set lying around that he'll "give" to me and install)
Koni front struts
All forged internals
Stock crank
No cats
Flow 40s
3.73 gears

Anyone with a similar build care to share numbers? Perhaps a video

Turned the keys over Dec. 3rd last year and as long and money continues to come in like planned, it'll be a Christmas present myself!

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lwarrior1016 · Nov 9, 2016

I am running a "similar" setup. It hasnt been tuned yet. Mine is at 12:1 with comp 278's. All I have is an idle video. Ill be getting my tune very very soon though. I think you should opt for a little more compression with those cams. Plenty of guys run 10:1-10.5:1 with stock cams every day. Thats about what a pi head swap will get you.

[video=youtube;FwDZpelKWBo]https://www.youtube.com/watch?v=FwDZpelKWBo[/video]

96blak54 · Nov 9, 2016

You want to run more compression?

You come to the right place!

DropTopPony · Nov 10, 2016

That is right around what a PI swapped car is at so plenty have done that on DD stangs around here without issue. When I did mine back in the day I just used higher octane gas to make sure there wasn't any detonation.