DeTomaso Mailing List: April 1997, Message #186
     



From: "D.Jones" <m203253@ws2200.mdc.com>

Subject: Re: 4.6 Liter DOHC

Date: Mon, 21 Apr 1997 15:26:56 CDT





> Pick up a copy of the Ford SVO catalogue; they are beginning to release some

> stuff for the SOHC 4.6 modular motor. You might consider the 5.4-liter SOHC

> truck block/crank and the 4.6-L DOHC heads.



Yup, SVO will be targeting the 4.6 SOHC since it has the sales numbers.

Remember, the 5.4 block is taller and therefore takes a wider intake

manifold.  Your best bet, short of a custom manifold, is to make spacers

for the 4.6 DOHC manifold.



> With a lot of work on them re valve sizes & porting,



Well, there's not a lot you can do about valve sizes.  The 3.5" bore

is a physical limitation.  Now if you had a nice 4" bore like the

Cleveland, things would be different.



> this combo could get back most of the lost torque of a Cleveland



Yup, the 5.4 has a very long stroke.  It's an undersquare motor.

The extra displacement (over the 4.6) is all from stroke.



> with the power of the cammers.



Of course, an engine doesn't really care where the cam(s) are located.



> Let me know how it works- I can't handle the nearly $15,000 it cost

> one club member before he got thru with his > 4.6L/'87 GT-5S!



Ouch!



Later,

Dan Jones