hey everybody
i have a 87 cougar xr7 with a fms E 303 cam ,speed pro pistons, block bored out 30 over ,mustang headers2 1/4 inch, flowmaster lers, aod with transgo shift kit. i have stock HO intake and throttle body and stock rear end gears. i am thinking my problem is that i have 4 catts on my h pipe. at the track i take it up to about 2200 rmp and then mash the gas. i am thinking about an off road h pipe and 4.10 gears and then latter to come 70mm tb and cobra intake manifold.
any advise would be greatly aprecciated.
Is this a complete HO conversion or an SO with ad on parts?
What gears are currently in the car,factory 2.73s?
Really doubt your H-pipe is the problem unless the cats are plugged,and running a 15 i really doubt they are.
2 1'4 is a little small for exauste,should run at least 2 1/2.
Are you running the stock convertor?
If the car is mostly stock 15 is a pretty good # and just about right,what was your 60foot?
More info needed.
What are your gears?
What heads do you have on the vehicle?
How much gas do you have in the car when you hit the 1320?
how much stuff is in the trunk?
What dominator said....
AND what is you trap speed????
i think my gears are 3.43 not sure and what is trap speed
The average speed you're at right before to when you pass the quarter mile mark.
Edit:
Such as a certain number of feet before you cross the line...don't know the exact number. Its the average speed over that area
the track print out says
reaction .104
60 2.185
330 6.31
1/8 9.65
1000 12.58
1/4 15.08
mph 90.02
i thought i would run at least a 14.5 with the cam and it being bored out. the stall on it is i think 2200 2400...
please help me out!!
A 90 mph trap speed gives you approx 210hp at the rear wheels, assuming a 20% drive train loss, your making roughly 260hp at the flywheel. So if you're running stock heads, anlong with the intake and throttle body, thats about gonna be it. More stall(2800-3000) on the converter would help for a tenth or so, but you're gonna need some more under the hood if you get the mid 14.
Assuming you have mass air, what is the air meter(mm) and injector size(lb)?
Well for what u have thats not to bad.
What Speed pre pistons did u have put in the motor.?
Whats the compression? Do u have stock heads? And work done to the heads,
When i had my 30 over 302 i had 10.8:1 compression with X303 heads and E7 heads that i had grinded the Exhaust humps out and put a cast stick into the Exhaust holes to plug them. My cougar went 14.2 on the motor and 12.80 with bottle help.
I had 4.10 gears and build AOD with good susp.
Things U will need to think about are better lower controle arms, South sides are the best and u can still find knock off that work just as good.
Gear will help. A small NOS kit would do wonders for u.
yeah...sounds like you are right in the ballpark
You,ve got a bit of tire slippage going on there,an almost 2.2sec 60foot is pretty bad.
Knock that down to like a 1.9 or so with some good grip and it would put you into the late 14sec range.
Just curious to why you think your gears are 3.43?
Did you change them?
Cougars and t-birds never came with 3.43 as an optional gear ratio,2.73 for regular or 3.55,3.73 for the turbo coupe.
Chirp is right though a small nos kit(if the pistons you have are forged)would help get you into the 13s for sure.
I'm going the N/A 13s route though for now and if i feel that's not enough a nos kit to put me into the 12's might be evident in my future,the only problem i run into with that is, nos being a dangerous item in an accident situation and not having much of a place to put the bottle being i have a mssive sub box in there.
be thankfull your not running 17s?.....
Don't forget that 3.08's and 3.27's also came with these cars (tow package/V6).
Yea that's what i thought.
He is driving an 87 though and it should only have the 2.73s as i believe that was the only stock gear in those,unless it was changed.
Had 3.27s in my last bird with a 7.5 rear but i changed them from the stock 2.73s when i worked at ford.
Now that i have the TC i've got the 8.8 rear with the 3.73s which is mint because i don't have to spend any money on my rear to accomodate the 5.0L.
This is one of the things that "Ford in there infenite wisdom" did right.
Speaking of that,anyone know of any other 80s or 90s ford cars that had factory 3.73s?just a thought.
yup it is a 3.45 i had to check again in my notes on the car.i had wrote it down but my penmenship sucks.i have an R code axle which is a 3.45 lock,my screw up.
I hate to say this but the most fun i had was when i had my Z28 with a mild motor and a NOS cheater kit. The car was almost stock with just headers and rebuild motor with so so pistons. I could beat on the car time and time again and it would work fine.
My Cougar was the same way i could beat on it but it was right at limit of were mild parts start to go snap. The car was not that fast when u see other cars do but it drove to the track and 30,000 miles a year on the car.
My T bird should be in high 12s on the motor and i want deep 11s high 10s on the bottle with ET streets. Em i asking to much? I dont think so, But i know i will snap stuff if i dont put my car on a diet.
I have a bone stock 87 XR-7. 5.0, AOD, 2.73 posi 7.5 rear. The car has almost 300,000 miles on it, and I ran a best of 16.36 with it last year. The motor leaks big time right now, but it's running to strong to tear it apart at the time, so I'll keep driving it and collect the parts for the HO conversion. I have everything for a HO Speed Density swap, but I plan to rus MAF so I can add a SuperCharger later.
Sounds like your setup should be a little faster, but all the numbers seem to add up right. By looking at your 60 foot time, looks like you have the 2.73 gears as well. Great for fast cruising on the freeway, but sucks the rest of the time. You can find a Ranger pickup in the wrecking yard and take the 3.73's out of one or the 3.43's, and that will improve your 60 foot, help a little on ET, but not MPH.
To me that looks about right too. You really haven't done all that much to the motor and you're trying to push a heavy car down the track. With the weight, gears and the power you have on tap 15sec is pretty good.
All of you are making me feel good. I too run 16.30's at Bakersfield in a 3240# T'Bird, only I'm doing it with a stock 3.8L V6. Chassis is tweaked, 4.1 gears, w/ Trak Lok, headers, AOD shift kit and 3000 stall convertor. Motor is stock, except for valve springs and a Holley 500 CFM 2 BBL carb. Lots of untried things for the motor. I'm still try to decide on a built V6 or go fast V8. I have this thing for underdog combinations! P.S. When I started I was running 19 seconds! Fred
If you can keep the head gaskets in it..go for the built V6 ;)