only running a 15.0 sec quarter mile

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only running a 15.0 sec quarter mile

March 19, 2005, 08:21:29 PM

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.

Re: only running a 15.0 sec quarter mile

Reply #1 – March 19, 2005, 08:31:12 PM

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.

Re: only running a 15.0 sec quarter mile

Reply #2 – March 19, 2005, 08:44:17 PM

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?

Re: only running a 15.0 sec quarter mile

Reply #3 – March 19, 2005, 08:44:17 PM

Quote from: dominator

More info needed.

What dominator said....

AND what is you trap speed????

Re: only running a 15.0 sec quarter mile

Reply #4 – March 19, 2005, 09:39:48 PM

i think my gears are 3.43 not sure and what is trap speed

Re: only running a 15.0 sec quarter mile

Reply #5 – March 19, 2005, 09:44:28 PM

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

Re: only running a 15.0 sec quarter mile

Reply #6 – March 19, 2005, 09:56:31 PM

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!!

Re: only running a 15.0 sec quarter mile

Reply #7 – March 20, 2005, 12:39:07 AM

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)?

Re: only running a 15.0 sec quarter mile

Reply #8 – March 20, 2005, 03:30:19 AM

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.

Re: only running a 15.0 sec quarter mile

Reply #9 – March 20, 2005, 10:54:12 AM

yeah...sounds like you are right in the ballpark

Re: only running a 15.0 sec quarter mile

Reply #10 – March 20, 2005, 11:02:44 AM

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.

Re: only running a 15.0 sec quarter mile

Reply #11 – March 20, 2005, 12:08:42 PM

Quote from: dominator

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.QUOTE]

he mite meen 3.47 cause that is what my 85 XR-7 5 speed came with.that is only if it has been changed

Re: only running a 15.0 sec quarter mile

Reply #12 – March 20, 2005, 12:18:36 PM

be thankfull your not running 17s?.....

Re: only running a 15.0 sec quarter mile

Reply #13 – March 20, 2005, 01:06:30 PM

Quote

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.

Don't forget that 3.08's and 3.27's also came with these cars (tow package/V6).

Re: only running a 15.0 sec quarter mile

Reply #14 – March 20, 2005, 02:37:06 PM

Quote from: phyxius

Quote from: dominator
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.QUOTE]

he mite meen 3.47 cause that is what my 85 XR-7 5 speed came with.that is only if it has been changed

there is neither a 3.43 or 3.47 gear set, but there is a 3.45 for the 7.5... Was the only gear avaiable in the early Turbo Coupes and XR7s