Fox T-Bird/Cougar Forums  

I've decided to go with the 5.0 ho swap. I've come to realize is not much i can do with my v6. So im gonna replace it with a v8.

Yes ive taken my car to its limits several times  mainly on the highway

I knew these speeds were not happening legally. A big majority of us on this site break the law by driving our cars with missing, altered, or disabled emission control devices. No judgement here.

Judgement here. Missing, altered, or disabled emissions devices won't kill yourself or someone else if you lose control, etc.
Stock brakes on our cars are barely adequate for the speed limits..let alone anything at near twice that. Stock suspensions, worn ball joints, and tie rods....just a recipe for bad bad luck.

I lost a very good friend who was in the prime of her life because she was in a shiznitty car that was beyond it's limits just going one mph over the speed limit.
At least buckle up and do stupid shiznit on a country road where there's no traffic.

Removing the egr has not shown any horsepower gains on mostly bolt-on or stock engine combos. The egr does not function at wide open throttle anyway. Removing it by simply disconnecting it and blocking it off does in fact remove part throttle performance. The EEC uses the EGR, along with various other sensors, to adjust timing, fuel pulse and the like. If you want to delete it the correct way either buy a egr simulator on electronic ones or have it tuned. And dont forget for the automatic cars a new modulator is mandatory. Non EGR cars use a different Modulator and not changing it will smoke you tranny in. Also your cylinder temps will rise by leaps and bounds. And this destroys performance.

Cats new 200 cell cats actually make performance a bit better. Hot exhaust gas moves much more easily than cool exhaust. Hence a cat can increase HP very slightly in some applications. We tested a 500 Hp chevy with and without a cat and the difference was so close we could not tell the difference on the DYNE.

Timing your timing has to be tailored by a given number of total degrees with the available amount of timing designed in a distributor or ECM. To much will kill the top end. Just sying that is my $.02 For what ever it is worth. If yo use a vacuum gauge to set timing you will most likely advance way to much. Reasom being is any engine at idle will increase vacuum with an early engine timing parameter. Once again just me.


I have never seen a 302/5.0 that liked more than 36 degrees total. Most make the most power with 34 or slightly less.

When an engine that is computer controlled sees an egr valve open it immediately richens up the mixture, As posted above in my answer i explained that. It also drops the vacuum and once again the ecm compensates for that. The ECM is looking for egr at certain times and when it does not see it it does not change the mixture and timing parameters. So it does not respond as it was programed to do. The extra vacuum from the deleated EGR sends wrong amounts of vacuum to the transmission equipped with a vacuum modulator.This in turn speeds up the shift points and also degrades performance. And reduces line pressure.  Granted newer units dont have modulators any more. But never the less the MAP gets the wrong vacuum signal and further complicates the issue. Deleting an EGR is not a good thing to do and reduces performance.  As for deleting the rear o2 sensors by tuning them out is useless in a state that does emissions. The new  test benches test for that  and bingo YOU FAIL. These guys got wise to that several years ago. So if and when your state does emissions on obd2 vehicles they just may fail you car and they will. Or they man not have the latest up dated machines as we have in CT. Or a visual check may be mandatory. Either way the rear o2 sensors do not effect tuning. They are only cat efficiency testers Either way we will never agree on this so lets drop it. Once again the DYNE does not lie and if you remove the EGR you loose power and the dyne shows that infatically. Lets call it a day.