1989 302 5.0

[Maciasmarci]

Hello there..I’ve got a 1989 5.0 302 .30 over with hyp pistons, gt40 heads, upper/lower intake, B303 cam, stock valvetrain , 19lb injectors, longtube headers, t5 trans. Do I need a tune for this setup? Any advice would be helpful.

 

[Monkeybutt2000]

Absolutely......NOT. You can "tune" it yourself with timing,fuel pressure and TB adjustments. Beyond that,with such a simple combo it's unnecessary. The whole "tune" idea get's thrown around WAY to much nowadays. With the newer cars, seems like any little change requires a "tune" to run at peak performance. Not with these old Foxes.

 

[7991LXnSHO]

It’s counterintuitive that a simpler computer would be more self adaptable to mods. It is true in this case.

 

[General karthief]

There was a thread on this very subject a while back.

 

[General karthief]

Yup:

Do you really need a 'tune' or is it bs

I get a chuckle when I read 'I have a bla bla mustang with a belly button engine, a 70mm tb and maf with 24 lb injectors, twisted wedge this and equal lenth that and a (pick a cam). My buddies (that likely drive 'tuner' toyotas and hondas) tell me I need a 'tune'. I have my uneducated thoughts...

stangnet.com

 

[Maciasmarci]

Ok . That’s what I thought also. I’m not entirely sure why my engine rebuild guy was very persistent in telling me I would need a tune after I get the car up and running. @Monkeybutt2000

 

[Mustang5L5]

Friend of mine built the exact same combo years ago. No tune, ran well and was a fun combo