302 efi performance
Thread Starter
|
FTE Legend
Joined: Aug 2004
Posts: 37,887
Likes: 20
From: North Central Rural Sask.
See right now I get around 20 mpg with my 302. It is a 2 wheel drive and a 5 speed. I thought about swapping a 351w in, but stock they only have what, 10-15 more horsepower? I guess with those mods you mentioned it would add about 20 extra hp, compared to a 302 with the same mods? My dilemna is the added price, and I know for sure a 351, in my application wouldnt get better mileage, just since my truck, is like a car lol.
Thoughts, opinions?
Thoughts, opinions?
Moderator
Joined: Jun 2003
Posts: 3,547
Likes: 71
From: Calhoun GA
An adjustable fuel pressure regulator is actually quite effective for a speed density application and open loop/WOT conditions with a mild build and no aftermarket tuning. The ECU doesn't make fuel trim changes in open loop and the 02 sensors are shut down under this condition. The tables (for speed density) are fixed so there wont be any change in the fuel with the added airflow. In closed loop the ECU does make short term fuel trim changes but the affect the FPR has is minimal (if any).
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Originally Posted by preppypyro
See right now I get around 20 mpg with my 302. It is a 2 wheel drive and a 5 speed. I thought about swapping a 351w in, but stock they only have what, 10-15 more horsepower? I guess with those mods you mentioned it would add about 20 extra hp, compared to a 302 with the same mods? My dilemna is the added price, and I know for sure a 351, in my application wouldnt get better mileage, just since my truck, is like a car lol.
Thoughts, opinions?
Thoughts, opinions?
That said I agree I don't think you would be able to squeeze 20mpg out of a 351. Add to that the fact you will be replacing the rear tires on a regular monthly basis. In a 2wd reg cab pickup with a worked over 351 you will be smorldering up the meats ALL THE TIME, especially when you are not trying to.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Originally Posted by preppypyro
Replacing the tires is fine by me, its kind of the point for me doing the truck up haha. Conanski, what kind of mileage do you get with your 351?
Highway milage is pretty consistant at 17mpg though cruising 70mph.
Freshman User
Joined: Apr 2011
Posts: 25
Likes: 0
Sorry to butt in but, I also have a 89 f150 w/302. I recently bought a short block from an engine shop. He advertised it was a 1991 remanufactured 302. After futher investigation it turned out to be a 1979 302 out of a fairlane. I already put it in the truck and put on all accessories. It fires up and idles for about 2-3 mins. then dies and won't restart. It sounds like a major vacuum leak. My question is will my fuel injection intake bolt on to those heads match up with those ports correctly? Any advise at all would be greatly appreciated.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Yes the EFI intake will bolt right on, nothing has ever changed on the 302 with respect to the head and intake configuration so parts from all years will simply bolt on.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
New User
Joined: Feb 2014
Posts: 1
Likes: 0
well i have 1992 f-150 5.0 EFi, i have super come hooker hedders, k&N full intake, 2 flowmaster 40, hp chip, msd coil, mallery hot box, and 56 mm bbk on it and all that was worth it, so do gt 40 heads and edelbrock intake 3841, and i aslo put a powertrax auto locker in it, that works the best. then you will have built 302 and it will run and look oem
Thread
Thread Starter
Forum
Replies
Last Post
mjr46
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
37
Aug 22, 2021 05:51 PM
redrush40
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
4
Jul 11, 2006 08:38 PM
daytoncobra
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
1
Feb 20, 2001 02:27 PM
