1997 reg cab flareside 4.6L Tops out at a 100 MPH. Never tow with the thing, its just kinda my hot rod at the moment.

Right now it has the 75MM BBK TB that is gasket matched to the intake, Accel coils, a Hypertech programer, K&N filter, the fender PVC intake mod, Bosch +2's, duel cats with true dual exhaust dumping into flowmaster 40 series.

I might even go 4.10's if someone says it's worth it. Or should I just do the Troyer dual 16" electric fan?

THX in advance

 

I'd go 4.10's or maybe even 4.30's, if its 2wd. 4.56 would really put outsome grunt!!

 

You'd definitely be disappointed with 3.73s if you have 3.55s now. As mentioned before, go with at least 4.10s.

 

Either 4.10's or 4.30's with a limited slip. Get custom tunes for your exhaust and BBK throttle body. Your Hypertech isn't compensating for them.

 

4.10 for the win

 

I'd go for 4.10s

 

Thx for all the input on the 4.10's. Looks like I am calling on them first thing Monday morning

Is a custom tune worth spending 400+ bucks again? Reason I got the hypertech is most programmers for 1997 looked the same +11 HP, not one of em stood out, and the hypertech was the cheapest.

 

Go with the 4.10s. Ditch the Hypertech and the Bosch plugs.

Also, your truck isn't "topping out" at 100, the computer is shutting it down.

 

Wait, he has Bosch plugs in his engine?!

SWAP THEM OUT FOR MOTORCRAFTS IMMEDIATELY!

 

 

custom tunes are worth it. sell the hypertech to recoup some money

 

Why swap them out? I have run them in everything I have owned since they came out out with the +2's and the +4's. Last thing I indexed and filed plugs on was a 1985 Trans-am back in like 1997. I have been running them for over a year in this truck and no DTC's or problems

THX in advance

 

Then you're one of the few people who has successfully ran those plugs in these trucks without an issue. Most go bad within a few thousand miles.