I am in the process of rebuilding a 460 for my brother in law, and we talked about do a cam while it was down. I talked to Comp Cams and they said that you had to stay at 112lsa to keep the sdfi happy. All their off the shelf cams are 110lsa. Said it would cost $188 to custom grind their 255deh profile on 112lsa. Can anyone backup or refute these claims?

Talked to Charles at Camcraft, and he can grind me a 206/210 @.050" w/.490/.505" lift on 112lsa with lifters for $200. I think I have my bro-in-law talked into headers to replace his cracked manifolds too. Should be a real stump puller

 

I just got done rebuilding and installing my 460 in my 89 F250. (I am the original owner to it.) I asked the same questions and everybody told me just to get a RV cam....slightly better breathing......as the EFI won't tolerate anything else. The end result.....truck runs great but I can't say there is a significant amount of power change.....I also replaced the entire exhaust system and put in a flowmaster into duals retaining the original (although new) converter. It seems to be a little more responsive (maybe its just the noise from the flowmaster that is giving me this impression). My original mileage was about 12....now I get about 10 but I am still playing with a few minor adjustments hopefully to get a little better milage.

Good luck with yours.

 

i read on another message that the online store or the guy at the begining selling chips can customize your computer to any cam you want .dont know if its true but sounds posible.

 

I finally changed to mass air with my 460, but the CJ cam from motorsport was installed with speed density and a chip and it work wonderfully for pulling trailers and around town, kept me in the power range while pulling hills 4th gear @ 2500-3700 rpm still building power rather than above it which was my problem with the RV cam also improved mileage while pulling by .5-1 mpg. The Speed density was irritated by the drop in Manifold pressure. Hypertech, Street & performance and several other companies have special chip burning departments. are you uping the compression ratio? I ran a little better than 9.5. definately open up your exaust ports and put in larger valves, your heads on a flow bench will floww a little better than a stock set of CJ heads. the speed density will work with head work like that. you can use a 1970 429 timing chain to place your cam @ top dead center.

My .02
Dusty


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Why Buy new when you can build and tailor it cheaper?
F-350 4x4 ext cab Short Bed Green Monster, it is now Sporting a 300HP 715lb/ft Dyno rated 5.9L 12v Cummins diesel w/ NV4500 5spd and custom NP205 ford T-case w/ rear spicer 1410 yoke, Converted to Sterling 10.5 gears w/3.73 gears using the 41 spline pinion and 1410 U-Joints, Power-Lok equipt Dana 60 front, 33's on 16x8" Outlaw II's. (Used to have)205000 miles, Mass air 460 w/ performance heads and a E40d to 5spd conversion and Doug Thorleys. Old EFI 460 @10 MPG to the 12 V @ 23.2 MPG @ 75 MPH and loving it.
My other toy is a '69 CJ-5 354 Hemi 4 spd 4.88's 32x12.50 MThompsons w/ power-lok 44 rear.