Hey guys,

I was wondering if the 302 from an '89 truck has valve reliefs?

Nik!

 

No it doesn't.

 

Will I run into PTV problems with a b303 cam? It does have E7 heads, I was assuming it would have Valve reliefs.

Nik!

 

Also whats the lift on the stock cam? Cam specs?

 

Where can I find these specs? I would like,to know the compression, power.... Ect.

 

Stock '89 truck has dished pistons for a nominal 8.5:1 compression. A B303 cam probably won't produce P-V clearance issues, but it's a terrible cam for a 302 in a truck(as are all the alphabet cams), and will require mass air to run smoothly and pass emissions. The stock '89 truck cam is flat tappet and produces 0.379/0.395" lift and 244/256 deg duration at the valve, and the motor was rated 185hp and 270ft/lbs TQ with all stock exhaust. A far better cam is the Comp 31-255-5 or the F4TE roller cam(0.422/0.448" lift, 256/266 duration), once you go beyond this with longer duration cams low rpm power begins to fade.

 

what are you trying to achieve with this motor?

 

begins to fade?
I have an F4TE, and It is definitly no low-end powerhouse. 2000+ for anything!

 

What If I was to run a B303 with a 1.7 RR. Giving me .510" lift? Anyone run this o nan 89 truck engine?

Also this engine is going in my stang, Not a truck. I have the cam, conversion setup everything.

nik

 

why don't you ask these questions on a 'stang' forum then?

 

I ask these questions here because this is a truck engine I am using.

Also I put the B303 cam in, lifters, rockers, dog bones, spider, 6.25" pushords and the pushrods are too small!

WHY?

 

Did you use roller lifters?

 

Yes everything from a mustang 302HO.

 

What are the casting numbers on the heads, it'll be on the head gasket side near one of the intake ports.. you'll need a mirror to see it with the intake off.

 

E7's..........