So maybe.. its more more of a want, but I reckon all ya'll understand. I have a 1990 F250 with the 7.5(460) single cab 5 spd mantran. rented some snowmobiles this winter for the hell of it, pullin em back to the shop in a hurry left the lot at 430 had a 25-30 minute drive time had to get em back by 5 and still fill em up. hit a few minor hills, that when empty and free I can gun 'er and keep my speed right round 55. to keep my speed I ended up down shifting part way up the hill, made er at bout 45. I know this is acceptable when pulling etc, but I'd like to goose it for all its got. few things I thought of.. exhaust ends after the cat, front hubs locked, was below freezing, little late on oil change, didn't rev it up before the hills. Has bout 112xxx original miles, replaced the clutch in september.
SO ... throttle body spacer.. anyone use em, your thoughts? or cj Banks exhaust kit, thoughts on it?

 

Best power gains for the EFI 460:

-Do a search for the 6 liter tuneup. It helps on all of the 80's and 90's Ford trucks.
-Longtube headers: Banks are excellent, they know it and price accordingly. Doug Thorley's are good as well. Other brands work as well, but a little fitment can be needed depending on transmission, and some, with the thinner flanges, need to be tightened periodically. Just stick with long tubes as you're looking for torque gains for towing.
-Exhaust: the stock cat is a huge restriction, especially after 100K+ miles. Check to see if it's plugged. Remove it if you can or replace it with a high flow cat. A catback exhaust will also help though it's gains are smaller. For exhaust you don't need anything fancy (local exhaust shop is fine rather than a kit). Don't go larger than 3" single on a stock motor and I think 2-1/4" dual is the recommended size. There is no advantage to going with a true dual setup as the exhaust need to route to the passenger side and back-pressure will never be completely equal.
-Advance the timing. This is part the 6 liter tuneup, but it needs to be stressed. There aren't any "chips" out there that will magically add horsepower.
-Throttle body spacers, cold air intakes, and the like are useless.

Without a Quarterhorse, Tweecer, or aftermarket ECU, there isn't a whole lot more you can do to add bolt on power short of finding one of the rare Vortech units. The factory ECU in speed density form won't accept many power adders that mess with vacuum and volumetric efficiency. You can do a ECU swap from the 5.0 mustang (A9L is most common for the amount of support) with a bit of re-pinning on the wiring harness and a QH or Tweecer tuner, or you can use any of the truck ECU's (again with the QH or Tweecer) since you have a manual and don't need automatic transmission control capability. The best option will be a California MAF 460 truck ECU though that will be difficult ECU to find. There isn't much for power gains from a cam swap on the stock ECU, and the straight up timing change commonly touted is for carb motors and doesn't apply to EFI trucks as the cam is already installed straight up.

If you still feel the need for more power, and are willing to sacrifice some fuel mileage, re-gearing will be the most cost effective way to get the power to the ground. What gearing are you currently running?

 

Hit up Boport for some custom EFI heads: https://www.ford-trucks.com/forums/9...ts-are-in.html

 

3 words: turbo diesel swap.

 

j/k

 

excellent confirmation of what i need to do to my 90 f350 CCD 460. Banks is having a 25% off sale this weekend so I'm tempted to get their long tubes but they're still$1000 on sale with $1600 for their whole exhaust system on sale.

I may just eliminate the cat all together since i can run antique plates in 18 months.