Open question, I have a 5L auto. 1994 F150 w/mass air, have a lower and upper manifold w/65mm T.B. from a "Cobra 5L, was wondering if a switch to the above would increase my H.P./Torque in the truck??
Will be installing:cam, tube type headers,true duals w/FM and Hi-flow Cats, gearing to be 3.73:1.

Kirk

 

im not sure, but you might have to play around with the throttle linkage on the manifold because believe its a little different than the ones on the trucks. theres someone here that did a similar manifold swap, maybe they can tell you more about it. good luck!

 

Try a search... someone did a similar swap not long ago and posted in depth details and feelings on power changes.

Since the boards have been busier in this area I can't remember who it was! Fairly sure it's been in the last couple of months though, and think he used a reg HO intake rather than the Cobra.

 

Here is the thread:

https://www.f150online.com/forums/sh...threadid=71893

I will say that now that I have the thing closer to being tuned properly it is definetly worth it. In that write-up I said it was only worth about 10ft'lbs its probably closer to 20 now and it revs all the way to 5500rpm. I did not have it tuned correctly and in fact I still may not have it perfect about 3500rpm.. It keeps taking more fuel when I keep thinking the key to N/A power is to lean it out. But, if its already too lean than it doesn't help

So net net, near 20ft/lbs between 3000-4000rpm and easily 20rwhp at 5000. The hp part is not apples to apples since I rarely shifted the stock intake over 4500rpm (on my stock tach which of course is suspect). The new intake w/ factory tach still is running best when I shift at 5500rpm.