1989 302

Reply Subscribe

Thread Tools

Search this Thread

Dec 13, 2006 | 11:37 PM

tradecki

Thread Starter

New User

Joined: Dec 2006

Posts: 23

Likes: 0

1989 302

I am new to this and would like to know if the F-150 302 is the same as the mustang 302 other than the intake

Dec 14, 2006 | 07:52 AM

Conanski

FTE Legend

Joined: Jun 2006

Posts: 31,930

Likes: 1,499

From: Ottawa, Ontario

Yes and No. Different intake as noted, but the HO also gets a healthy roller cam, and from '89 on uses a sequential mass air injection system versus the trucks speed density batch fire. The HOs from the pocket rocket era, '87-'92 also had forged pistons, which is a benefit for adding a blower or spray, but otherwise makes no performance difference. The block and heads are identical though, so you can make a truck motor into a HO by swapping on/in parts.

Dec 14, 2006 | 10:20 AM

Lumpy87

Senior User

Joined: Jun 2004

Posts: 291

Likes: 0

I think they also have different timings therefore different cams. I believe the crank is the same though.

Last edited by Lumpy87; Dec 14, 2006 at 10:27 AM.

Dec 14, 2006 | 11:40 AM

Talyn

Hotshot

Joined: Oct 2003

Posts: 17,791

Likes: 99

From: Ashland City, TN

Roller cams are diff.
You cannot have a steep climb on a solid cam as compared to a roller cam.
Running rollers on a solid cam has no benifit whatsoever.

The HO's have a different fireing order also. I think. not 100% sure on that one.

Dec 14, 2006 | 05:07 PM

Lumpy87

Senior User

Joined: Jun 2004

Posts: 291

Likes: 0

I meant firing order not timing. It shouldn't make a diffference as long as you keep the engines original injector harness and computer.

There may be differences in the serpintine belt and accessories. I know I had to specify which direction my fan rotated when replacing the fan clutch.

Last edited by Lumpy87; Dec 14, 2006 at 05:10 PM.

Dec 14, 2006 | 11:24 PM

Ben-jamin

Tuned

Joined: Dec 2006

Posts: 291

Likes: 4

From: houston,tx

i know everything outside the engine is different, oilpan & pick-up, all the manifolds, front bracketry, timing cover,water pump, covers but; firing order is the same

Dec 15, 2006 | 02:17 AM

KDPate

Senior User

Joined: Jun 2006

Posts: 388

Likes: 1

From: Murfreesboro, TN

Quote:

Originally Posted by Ben-jamin

i know everything outside the engine is different, oilpan & pick-up, all the manifolds, front bracketry, timing cover,water pump, covers but; firing order is the same

Not quite concerning the firing order. Non-HO 5.0 engines used the old 289/302 firing order while the HO 5.0 engines used the 351W firing order. 85-up 302 blocks do have provisions cast in for the roller cam/valvetrain if someone wants to adapt it in.