im estimating 300 hp at the flywheel with all this stuff:
supercoupe heads ported out, raise the compression to 11:1, jacobs ignition, ported intake, throttle body, intake of somesorts, headers, 1.7 ratio roller rockers, superchip to tune it out, and everyonce in a while a good 50 shot of nos, that should get those ponies up there and with switching to a 3.73 limited slip rear end, it whould be one hell of a street machine, lowered 2/4 with nice 18 inch rims, nice performance tires, it should be a good fast truck

 

i heard yugos are coming back

 

hell gimme a yugo ill try to supe that one up to. it would be funny to watch a yugo haulin *** down a track

 

I see two flaws in your combo.

First, the rockers (but I could have this one reversed). Going from a 1.73 ratio to a 1.70 ratio would decrese the amount of lift your cam gives you, in turn not letting the air/fuel mixture flow in as easily.

Second, which I am very sure on is the supercoupe heads. The supercoupe heads are a single port design our truck use a dual port head. The supercoupe heads will not match up with the factory intakes. You would need the upper and lower supercoupe intake to match the heads, and dont even forget about the custom work that needs to be done to the engine compartment to make it all work.

Sorry to put a dampner on your idea.

 

man, i dont know what youre thinking, isnt the dual port thingy sorted out in the lower manifold?? i thought it was,
plus, arent our rocker arms at the stock 1.5? then if so, 1.9 if they make them
i forgot to mention, all the other little mods to, if so, then you can buy a ken bell supercharger for it, they make them for replacement of the stock supercharger, it only like puts out 3psi at tops, but if either combo worked, it would be a badass truck

 

I just wish I had a scanner. I have pictures of the single port induction heads and pics of the split port induction heads. I will say again, The supercoupe heads will not work unless you change intakes and all. I also double checked on thoes rockers and yes, the stock ratio is 1.73. Going to a 1.70 ratio will decrese the amount of lift that is going to your valves.

 

Going with Supercoupe heads would be a BIG step backwards in HP and flow. The dual ports on the 4.2 go all the way to the valves in the heads. So going with the Supercoupe heads and N/A single port upper and lower intake, your choking the engine off. When I ported the dual port heads and lower intake, those were a thing of beauty compared to the Supercoupe heads I've done. Much better heads in terms of flow.

Also 11:1 compression would not be very street friendly and would required high octane fuel. That compression with a supercharger- BOOM!

Also the stock rockers are 1.73, as stated. Plus the mounting is different on these heads, so off the shelf rockers won't work. I'd get a reground cam before I would try to fab a 1.9 rocker. The rockers are similar to 351 Cleveland rocker arms.

BTW- I should be droping my 4.2 in the car next week. I've have a '97 4.2 that I rebuilt, put a custom cam in, port and polished heads and lower intake, and putting my supercharger, long tube headers, and more on. We'll see how much HP that a 4.2 can put out.

 

tell me what you guys think of my estimates:

https://www.f150online.com/f150board...ML/000637.html

------------------
TRUCK
White 00' XLT 4.2 Auto Sport
Regular cab Styleside
3.55 non-limited slip
Superchip
Airaid FIPK
custom ported STOCK throttle body

PC
Thunderbird 1.1ghz @ 1.33ghz
Abit KT7A-Raid
384mb Kingmax PC-150 ram
60gig IBM 75gxp RAID array
Geforce2 GTS 64mb

 

Yeah i looked at some supercoupe heads thouroughly today at a junk yard, i was mistaken, i was mainly going for the up in compression, which can be managed if you have the right equipment, but oh well to that dream, lemme ask you guys this, when you do a full port job on the split port heads, wht kinda power gains are yall experiencing?? see i was thinking that the heads from the 3.8 in the t-bird had remained the same even for the 4.2, oh well, now on to my next plan, a set of gears and a limited slip carrier