05+ GT's look in here

[11sec05]

stock internals for now, i think the tune has alot to do with the motor problems but i do plan to put good crank,rods,and pistons in it soon but i want alot more power too. but i have to find time, full time job,trying to start a performance business on the side and working on my own 8 stangs, its hard to fix it if its not broke and i only have 12800 miles on the 05

[Boss281]

I've done 12.85 with a BAD clutch last November. I've been breaking in the new one here and there and will be back at the track in March. I fully expect a .5 second improvement with no changes other than the clutch (I blew 2 shifts and still got the 12.8). In late March I'll be reducing weight at the front and running 15" Bogarts...

John

[acstone7]

I've done 12.85 with a BAD clutch last November. I've been breaking in the new one here and there and will be back at the track in March. I fully expect a .5 second improvement with no changes other than the clutch (I blew 2 shifts and still got the 12.8). In late March I'll be reducing weight at the front and running 15" Bogarts...

John

Nice! What clutch did you swap to, and what are your mods?

[Boss281]

Nice! What clutch did you swap to, and what are your mods?

I had a Spec II+ that gave us fits since day one (August), but Spec tech support kept insisting that it just needed to be bled properly, or I had a bad slave cylinder. It took 3-4 months of bitching (and I kept racing it) and 4-5 track outings worth of testing to convince them it was bad--the car sat a lot in my garage.

About a month ago Spec FINALLY sent a replacement II+, that has been a jewel. I've been slowly breaking it in, but I had my son get in the driver seat after 200 miles to give it a "shakedown" this past weekend (he's a much better speed shifter than I am). It worked like butter. Like I said, the clutch won't be inhibiting me at the track next month. We think there is 11 seconds normally aspirated in this car with more seat time and bit of weight reduction. I hope so--he's breaking in a rebuilt 302 for his '87 and already I sense he's going to kick my ass AGAIN this year. Jeez....

Mods are:

-Exhaust-
Mac axleback muffler
Bassani catted x-pipe
BBK shorty headers

-Engine-
C&L cold air intake with custom SCT XCAL2, 93 octane
Comp Stage III cams
Steeda underdrive pullies

-Drivetrain-
Spec II+ clutch
Spec steel flywheel
Spydershaft Aluminum driveshaft
BMR front driveshaft loop
FRPP 4.10 gears
Hurst shifter

-Suspension-
BMR strut tower brace
BMR boxed lower control arms and relocation brackets
BMR adjustable upper control arms
QA-1 adjustable race shocks
Steeda Sport springs

-Wheels and Tires (Track only)
17" Bullitt Wheel replicas (17x9")
Mickey Thompson 26X11.50-17 ET Streets if I change at the track OR
Mickey Thompson 295/45R17 ET Street Radials if I have to drive on the tires

-Misc-
Raptor shift light
S&S A-pillar dual gauge pod
Autometer air/fuel ratio gauge
Autometer water temperature gauge

Coming in March:
BMR radiator support/swaybar delete support
BMR tubular k-member and a-arms
BMR rear sway bar relocation brackets
Bogart 15x4.5 and 15x10 wheels (haven't decided on tires yet)

[Boss281]

Oh, here's my front end nearly coming off the ground--that's with the stock wheels and heavy tires!!--on a 12.90 run just before my personal best:

[acstone7]

Love that pic Hope all goes well with the clutch and

Good luck to ya!

[acstone7]

Heres a q for ya...How come you didn't choose to go with longtubes?

[FalconGTHO]

As for "The Great Long Tube" debate, add me to the list of non believers of what I view as a myth that they dont add power.

Ill find out for sure on my car at least. Im going to dyno with no tune. Then tune and dyno again. Then cold air, tune and dyno again. Then long tubes, dyno, tune, dyno again. So for at least my car Ill know if the LTs add power, then how much more is gained after a tune for the LTs.

[BurnTire]

On a cobra they are worth about 10 HP.

[Boss281]

As for "The Great Long Tube" debate, add me to the list of non believers of what I view as a myth that they dont add power.

Ill find out for sure on my car at least. Im going to dyno with no tune. Then tune and dyno again. Then cold air, tune and dyno again. Then long tubes, dyno, tune, dyno again. So for at least my car Ill know if the LTs add power, then how much more is gained after a tune for the LTs.

On S197s that are normally aspirated, I have YET to see one documented dyno sheet with a before and after LIMITED to just the longtubes, that showed more than 10RWHP (my shorties provided 8, for Pete's sake). Frankly, I put the shorties on to simply change the frequency response brought on by the Mac mufflers. Fantastic sound but the drone would shake fillings loose when the windows were up and I cruised at 2000rpm.

Not wanting to continue the debate further with aftermarket TBs and CMDPs on NA S197s as well, but the fact is that S197 breathing is very efficient right from the factory.

If quality longtubes were handed to me (ARH, JBA, etc) or available for half the price, I might consider them for the sound alone, as my car hasn't been a daily driver for two years and I don't have to worry about the drone issues much. But the evidence coming out of many performance shops is that the bang for buck just isn't there.

But hey, that's just what I think...

John