Torque over top end

[cougaz]

I'm looking to get the most get up and go out of my cougar ATX. I've done quite a few mods hoping to get more bottom end, but it seems like it lost it. Now i realize its ATX so bear with me. I've done SVT upper intake and since its a 2001 i didnt have to do lower. I've done SVT throttle body, short ram intake, and cut off the resonator and replaced with a cherry bomb glasspack with 2.5 inch dual pipes going back.

Any help would be appreciated.
Thanks
Brad

[Blackcoog]

MSDS Headers should be next and then start looking into 3L swaps.

You can get bare headers only for around $250 if you call MSDS. If a 3L sounds like something you want to do then do the headers at the same time to save yourself the headache of swapping the headers onto the 2.5L while it's in the car.

Search GMK intake and look into building your own cold air intake.

[Tygerr]

Both good suggestions and I've done both. You'll also want to invest in a transmission cooler if you go that route. I was never able to break out of the 16's on the 2.5L without the help of nitrous. Which is also an option. There was a former member who supposedly hit 14.0 in the 1/4 with 75 wet shot on his atx. Unfortunately I was never able to get a track time on my 2.5 with the nitrous before I upgraded to the 3L.

[mmc757]

Purely hypothetical unproven idea:

I believe that a 3.0 UIM with a 65mm TB mated to the 2.5 LIM would move the Tq peak to the right.
Of course its not as simple as pulling one off and slapping the other on... for best results an adapter plate would go between the two in order to provide a smooth transition. All the plumbing that attaches to the UIM would need to be redone also. For even better results in the high end, remove your IMRC butterflys, plug the holes and tune it out. Then instead of an adapter plate, just machine the LIM to match up to the UIM. Thats probably beyond the scope of what your looking for though.

I base the 3.0 LIM theory on the data presented here:
Intake Manifold Tech: Runner Size Calculations - Team Integra Forums - Team Integra
I base the 65mm TB theory on the fact that 4 open 32mm intake valves are approximately the same cross-sectional area as one 64mm TB

Also, where is your exhaust split at?

[cougaz]

Purely hypothetical unproven idea:

I believe that a 3.0 UIM with a 65mm TB mated to the 2.5 LIM would move the Tq peak to the right.
Of course its not as simple as pulling one off and slapping the other on... for best results an adapter plate would go between the two in order to provide a smooth transition. All the plumbing that attaches to the UIM would need to be redone also. For even better results in the high end, remove your IMRC butterflys, plug the holes and tune it out. Then instead of an adapter plate, just machine the LIM to match up to the UIM. Thats probably beyond the scope of what your looking for though.

I base the 3.0 LIM theory on the data presented here:
Intake Manifold Tech: Runner Size Calculations - Team Integra Forums - Team Integra
I base the 65mm TB theory on the fact that 4 open 32mm intake valves are approximately the same cross-sectional area as one 64mm TB

Also, where is your exhaust split at?

My exhaust splits at the rear axle.

[cmlambert8]

Wouldn't a optimized y-pipe with the headers help out alot too? I think i recall reading on here that the stock one is a big restriction

[Quatrini]

i love my NPG cold air intake. i felt a huge difference.

[PzKpfw_III]

SRI's may look cooler, but they're more than likely just hindering your performance. You're probably sucking in a fair amount of hot engine bay air, which is robbing you of power.

[Blackcoog]

i love my NPG cold air intake. i felt a huge difference.

Your fender didn't fall off yet? j/k You have to hack half off the fender support to get it installed.

Move the battery to the trunk and get a GMK style intake. It is really easy to build: 3" aluminum 90 degree bend, 3" aluminum 75 degree bend, 2-3" silicon couplers, 4- 3" clamps, MAF adapter (if you don't have a SRI already), and a K&N filter (if you don't have a SRI already).

If you already have a SRI intake you can build one for about $50 plus shipping if you buy stuff online. Moving the battery to the trunk isn't necessary but I'd highly recommend it. It makes things much easier to work on in the engine bay anyway. You can get a smaller battery up front and make room for the intake if you want to keep it up front.

[StuartGrant]

Not quite correct, you have to remove one of 7 bolts used to attach it.