Join Our Ford Truck Forum Today

Document your Ford truck project here and inspire others! Login/Register to view the site with fewer ads.

Register Log in

Factory 302 Roller specs

conanski

conanski

457
33
Ontario, Canada
flareside_thunder said:
What are the factory cam specs for a 302 roller cam???I need something to compare to....Thanks.
Click to expand...

For what motor?

A Mustang HO?
A Mustang Cobra?
An Explorer 5.0?
A pre '94 truck 5.0?
A post '94 truck 5.0?
 
conanski

conanski

457
33
Ontario, Canada
So the stock cam in your truck is actually the same as the Explorer cam and is commonly referred to as the F4TE cam. It's not bad for a 5.0 truck motor with 186/197 deg duration at 50 thou and 256/266 deg advertised duration. Cam lift is 0.264"/0.280", multiply that by the common rocker arm ratios available for these motors and you get 0.422"/0.448" lift at the valve with 1.6 rockers and 0.448"/0.476" lift with 1.7 rockers.

Is your truck mass air? If so you have a LOT of choices for a replacement, just depends what your goals are.
 
flareside_thunder

flareside_thunder

Florida Chapter member
7,812
246
yes it is mass air and I've got a bigger TB just don't wanna run into PV clearance issues

EDIT: how do you do the math with the lift and rockers?
 
conanski

conanski

457
33
Ontario, Canada
flareside_thunder

flareside_thunder

Florida Chapter member
7,812
246
alright how bout from 1.6 to 1.7 since the majority of cams I've looked at state the lift in the 1.6 ratio?Also....how high with the lift do you think I can go without clearance issues?
 
conanski

conanski

457
33
Ontario, Canada
With a truck friendly cam P-V clearance isn't a problem, but valve spring coil bind is so you want to keep total lift below about 0.520" with the stock springs. With aftermarket springs that problem goes away too but it's not really buying you any additional performance since the heads don't flow any better above 0.500" lift. So 1.7 rockes are a good idea with the stock cam but not needed with most aftermarket cams.
 
F 150Cobra

F 150Cobra

"Wild HoRsE" Got Torque?
3,642
104
Aruba
but conanski.. he can get whatever cam he wants.. like the for example the Comp XE264 cam or the one i have 351-351-8comp cam. and make it a custom cam and lower the lift to where he wants ,

thats what i did.. i took the 35-351-8 cam and lowered the LSA the custom cam is not more expensive
 
flareside_thunder

flareside_thunder

Florida Chapter member
7,812
246
what about this Isky cam I'm looking at .252/.257 advertised duration and .465/.480 lift...with the 1.7 rr's it'll bump me to .493/.510 lift????Think you could throw it on ur desktop dyno for me right quick?Mine took a dump and not working.
 
F 150Cobra

F 150Cobra

"Wild HoRsE" Got Torque?
3,642
104
Aruba
wow.. an Ho cam uses 266 of duration... im not at home right now when i get home tonight i can do it for u no prob
 

auto02

62
1
desktop dyno's are'nt even close!a comp xe270hr14 works well with the factory fuel inj on these trucks.the spec's are [email protected],lift is .512-.512,and the ls is 114(which helps keep the idle from being to radical).you'll need a good converter to go with it!and by the way a stock mustang ho roller cam works good but advance it a couple degrees to move the powerband down to help get that heavy truck moving.as for the 1.7's,that was one of my first mod's years ago when my truck had the factory engine.they slowed it down over a tenth in the 1/8.truck ran consistent 9.90's with 1.7's and consistent 9.80's with the stock 1.6's.the 1.7's worked better after i added the nitrous though.
 
F 150Cobra

F 150Cobra

"Wild HoRsE" Got Torque?
3,642
104
Aruba
auto02 said:
desktop dyno's are'nt even close!a comp xe270hr14 works well with the factory fuel inj on these trucks.the spec's are [email protected],lift is .512-.512,and the ls is 114(which helps keep the idle from being to radical).you'll need a good converter to go with it!and by the way a stock mustang ho roller cam works good but advance it a couple degrees to move the powerband down to help get that heavy truck moving.as for the 1.7's,that was one of my first mod's years ago when my truck had the factory engine.they slowed it down over a tenth in the 1/8.truck ran consistent 9.90's with 1.7's and consistent 9.80's with the stock 1.6's.the 1.7's worked better after i added the nitrous though.
Click to expand...

thats the cam i have.. i just lowered the LSA to 110 becuase i have a carb.. since he has 1.7 rockers he can just lower the lift about 0.490 and use the other specs of the cam
 
conanski

conanski

457
33
Ontario, Canada
That Isky cam is another good option or as Jergen has pointed you could have a custom grind made. You can't mix flat tappet and roller cam parts, but you could run a flat tappet cam in your motor with flat tappet lifters and longer pusrods, no problem there. The upside is that FT cams are dirt cheap compared to a roller, but they require a breakin proceedure where a roller does not.
 

Ford Truck Articles

Recent Forum Posts

Top