[88StAnger]

Hello, I am new to this forum.

I am building a 1988 Mustang GT. I am installinga 340hp/340tq long block, GER performance transmission (AOD) with 2400rpm stall, and a 4.10 ring and pinion. Also included will be a complete suspension re-do including Eibach springs and new upper/lower control arms. Currently, I am at the engine installation stage. I estimate that I should get a MINIMUM of 255-260hp to the tires. Given these numbers and decent street tires and technique, does anyone have any idea what my 1/4 E.T.'s should be around?

[AdRock]

I'm kinda taking a shot in the dark but I would guess somewhere between 13.0 - 13.5. I could be way off, if so somebody will correct me.

Welcome to LSS

[swtguy]

low 13's probably. I'd get a higher stall(2800+ at least) and go for the 12's

[Nighthawk]

you should have no problem hitting 12's on drag radials with that setup.

[swtguy]

what h/c/i are on the motor?

[mach1blondie]

Originally Posted by swtguy

low 13's probably. I'd get a higher stall(2800+ at least) and go for the 12's

the thing is he's also building it to be a daily driver... thats why I told him to go with a lower stall

[BlueStangChik]

2800 stall for the street is JUST fine..

Hell my car when it had the stock AOD stock heads ran 12.00s on tires and a 100 shot. Mind you that was also with a crap load of weight,System,stock suspension,17inch cobras in the front.

[Nighthawk]

Originally Posted by swtguy

what h/c/i are on the motor?

i believe the 340/340 motor has an E cam and X heads

[swtguy]

Originally Posted by Nighthawk

i believe the 340/340 motor has an E cam and X heads

Those gt40 longblocks usually dont put out the power they are rated at for some reason. I run a 3600 stall on the street and it's fine. Takes a tad more gas to get it moving but not too noticeable.

[88StAnger]

The engine is not an FMS engine, but was build by West Coast Mustangs and a like engine was dynoed in their test mule to produce the 340/340 using a cobra intake and aftermarket exhaust (cats still on the car though). The cam used is an FMS X303 cam 224/224 .542. The heads are milled Gt40P heads with a 10.5 compression ratio. 1.6 RR's were used. I am using a knockoff (professional products, I believe) of the Edelbrock Performer series intake manifold. My goal is to beat stock LS1 6-speeds on street tires.

[enouf4u]

Originally Posted by BlueStangChik

2800 stall for the street is JUST fine..

Hell my car when it had the stock AOD stock heads ran 12.00s on tires and a 100 shot. Mind you that was also with a crap load of weight,System,stock suspension,17inch cobras in the front.

car weights 3450lb

[Nighthawk]

Originally Posted by 88StAnger

The engine is not an FMS engine, but was build by West Coast Mustangs and a like engine was dynoed in their test mule to produce the 340/340 using a cobra intake and aftermarket exhaust (cats still on the car though). The cam used is an FMS X303 cam 224/224 .542. The heads are milled Gt40P heads with a 10.5 compression ratio. 1.6 RR's were used. I am using a knockoff (professional products, I believe) of the Edelbrock Performer series intake manifold. My goal is to beat stock LS1 6-speeds on street tires.

good setup, i'll stick with my 12's guess on drag radials

[88StAnger]

The projected finishing date of the project is February (end). The motor should be in it in a few weeks and the exhaust installed. Next mod planned is the suspension re-do (braces, subs, springs, shocks, struts). Next, a GER AOD with a 2400 stall (sticking with 2400 as thats when the X303 cam becomes viable). Last will be the biggest: 4.10 rear ring/pinion (from the anemic factory 2.73...dont ask, every sports car I buy manages to come with 2.73, much to my annoyance...) After that, just some paint and a window tint. should have the suspension done by christmas and the Transmission shortly after. Also, thanks for the responses, 100% usefull stuff, you people have a quality forum.

Like I said, im just getting into the "building" aspect, but I do work at a dealership and if anyone wants to know something related to Ford, I can try to help out with that.

PS. just a little thing i heard from the top, the new cobra should be out in 06 (not sure if its an early 07 model or not) and should have a 5.4 with a blower pushing 485. The Cobra will once again be a Shelby product. Again, this is not concrete, this is just what has filtered down to me, but I thought you guys might like to know. PSS, if you havent taken a look at the new 05 GT, DO SO!!! The pictures are ok, but the car is a dream. And instead of nosing over, it pulls all teh way to redline (courtesy of the 2 intake andd 1 exhaust valves.) Also, some people wonder if/when the CVT (continuously Variable Transmission) will be used in a performance car, due to the fact that it keeps the engine in its "sweet spot" almost perfectly. Sadly, the design, while perfected for what it is, is not currently up to handling the torque of a true sports car. I know noone asked about this stuff, just a few tidbits i thought would be of interest. As to the Cobra REALLY being 485...sounds a bit high to me, but it could be, in the meantime, the GT is supposed to run the 1/4 in the low-mid 13's in bone stock form. 31% more torsional rigidity. 31 spline axles (!!!!!) and a 3.55 ring/pinion (manual transmission) (standard in the GT) Also included is a Panhard bar and a center mounted control arm to help with axle windup and wheel hop. Available 1000 Watt sterio system. --All in all, a pretty sweet deal for close 30 large.

[swtguy]

Good info on the cobras. Here are the specs on the Xcam

Vendor Ford Racing Performance Parts
Product Line Ford Racing Camshafts
Cam Style Hydraulic roller tappet
Basic Operating RPM Range 3,500-6,500 RPM
Intake Duration 050 inch Lift 224
Exhaust Duration 050 inch Lift 224
Advertised Intake Duration 286
Advertised Exhaust Duration 286
Intake Valve Lift with Factory Rocker Arm Ratio 0.542
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.542
Lobe Separation (degrees) 107




Basic operating range is 3500-6500. With the 2400 stall and especially with the auto your car is going to be a dog down low. I'd highly recomend either a higher stall or a different cam. Sounds like you've done your research and have a nice setup.(very similar to mine) Good luck let us know what it runs.

Originally Posted by 88StAnger

The projected finishing date of the project is February (end). The motor should be in it in a few weeks and the exhaust installed. Next mod planned is the suspension re-do (braces, subs, springs, shocks, struts). Next, a GER AOD with a 2400 stall (sticking with 2400 as thats when the X303 cam becomes viable). Last will be the biggest: 4.10 rear ring/pinion (from the anemic factory 2.73...dont ask, every sports car I buy manages to come with 2.73, much to my annoyance...) After that, just some paint and a window tint. should have the suspension done by christmas and the Transmission shortly after. Also, thanks for the responses, 100% usefull stuff, you people have a quality forum.

Like I said, im just getting into the "building" aspect, but I do work at a dealership and if anyone wants to know something related to Ford, I can try to help out with that.

PS. just a little thing i heard from the top, the new cobra should be out in 06 (not sure if its an early 07 model or not) and should have a 5.4 with a blower pushing 485. The Cobra will once again be a Shelby product. Again, this is not concrete, this is just what has filtered down to me, but I thought you guys might like to know. PSS, if you havent taken a look at the new 05 GT, DO SO!!! The pictures are ok, but the car is a dream. And instead of nosing over, it pulls all teh way to redline (courtesy of the 2 intake andd 1 exhaust valves.) Also, some people wonder if/when the CVT (continuously Variable Transmission) will be used in a performance car, due to the fact that it keeps the engine in its "sweet spot" almost perfectly. Sadly, the design, while perfected for what it is, is not currently up to handling the torque of a true sports car. I know noone asked about this stuff, just a few tidbits i thought would be of interest. As to the Cobra REALLY being 485...sounds a bit high to me, but it could be, in the meantime, the GT is supposed to run the 1/4 in the low-mid 13's in bone stock form. 31% more torsional rigidity. 31 spline axles (!!!!!) and a 3.55 ring/pinion (manual transmission) (standard in the GT) Also included is a Panhard bar and a center mounted control arm to help with axle windup and wheel hop. Available 1000 Watt sterio system. --All in all, a pretty sweet deal for close 30 large.

[swtguy]

Oh and your setup should smoke 05's all day long.

[88StAnger]

What kind of stall should be purchased, a 3K stall? how would that be daily driving? Would MissRedRum hang me if I got a 3K stall? I want something that would allow good streetability (driving around McAllen on Nolana, basically a 45 mph crawl, could I do this? Would it relegate it to the track only (NOT MY PLAN)

PS> even though in my SIG I am from LA, I lived in Alamo for 4 years, hence my reference to the 5 o clock crawl on Nolana.

As to the cobra info--Subject to change.

[Nighthawk]

3000 stall is very streetable.

anything under 4k is very streetable. once you get above 4k its really about how much you can live with.

your gas milage will be worse, but not enough to really complain too much about, i mean, its a v8 mustang right?

[BlueStangChik]

Originally Posted by 88StAnger

What kind of stall should be purchased, a 3K stall? how would that be daily driving? Would MissRedRum hang me if I got a 3K stall?

I would say a 2800 Neil chance.. IMO best converter out there.. Or you could go Tci.. should be fine for the street.

But i would do some more reasearch and ask a few people who have run the number you are seeking, rather than basing your decision on the opinions of inexperienced "wannabe" racers.

If at all possible, ride/drive a few cars with similar setups. My idea of "streetable" may be completely different than your concept.
-Tanya

[12second5.0]

I'd use a converter closest to your operating range of power.

[88StAnger]

One guy I talked to today who is set up almost EXACTLY like me is running a 2800 stall, as to my definition of streetable, Tanya, I mean anything that i can take off from a redlight with without spilling my morning coffee when im trying not too . Basically, something that will feel "stock" until hammered (i.e. no real "jerkiness" on an easy takeoff) Will 2800 accomplish this?

Also, I have based a lot of decisions on research, and a few from people's opinion on this forum, as far as i know, all of which are well informed...I have not seen any "wannabees" (pls. this is not flaming ANYONE).