Has anybody used the 260 comp cam for these engines? How much of an improvement did it make? Thanks

 

Yes and some. Sit back with your favorite snacks and drinks and do some reading on this Forum and here too: FORDSIX PERFORMANCE • View forum - 240-300 "Big Block" Six Performance .

 

OK thanks does the cam make the engine idle rough?

 

no... you have to go with a more agressive Isky cam to make the engine idle rough from what I have read. I am in the middle of doing a P&P on an 83 and have the 260h kit on the way to install as well.

 

[SIZE=4]If you want that beloved cam sound, the slight loping, then you should either use the Isky 262, or the Clifford 264. Melling and Crane also make cams for the 300, but I am not familiar with them.

The comp 260 is quite a cam, with ten more degrees duration @.050" than the Isky 256, and six more than the Clifford 264. Although the Cliff. valve lift is quite a bit more.

It seems that with the the 260 you get the best of both worlds: great performance/duration, with a smooth idle and good street manners.

I should also say that installing a cam means a whole series of new parts, not just the cam. To be safe and for the engine to have a long life IMO you should use the cam kit offered with whatever cam you use. That usually entails cam, lifters, v.springs, keepers, retainers, and t.gears (all metal). Since the cam manufacturer usually requires a v.spring with more tension than oem, you might want to consider replacing the oem push in rocker studs with stronger screw ins. /SIZE]

 

hey F-250...

What are some good cams for EFI trucks with SD systems like my 88 I6?????

Was 1/2 thinking of giving her a little attention after the old 83 was running again...

 

I know the Isky 256 is computer compatible. Other than that I would check each co's site and read up on what they have available.

Note: Most guys say that you're really limited with what you can do with an efi engine. But then once in a while I'll read someone on here who claims they have an efi with the works, ie p&p, radical cam, etc., and they say it runs great. For what it is worth.

 

Did 300 I6's ever go MAF like the 302 and 351w? If so that would make finding a cam way easier!! I just don't know because I don't think I've ever seen a 95-96 F150-F350 with an I6.

Do you think a P&P job and a Isky256 would run ok with an EFI engine? I suppose I am putting the cart before the horse since I am needing to finish the 83 and then find something to do with my rebuilt 351w... Don't know if i want to put that windsor back in a old rusty farm truck...

 

OK thanks for all the info guys.

 

I don't know about the Clifford cam, but the Isky 262 and Comp 260 have the exact same degrees of valve overlap. In otherwise identical engines you probably wouldn't be able to tell one from the other.

There are a couple of 280 hydraulic cams out there, they should have a nice lope. Probably wouldn't pull worth a darn below 2,000 rpm, but would sound sweet at idle...

 

The Comp 268 has a bit of blurb. There is one in the exhaust audio thread at the top of the Forum.