I noticed in the Chiltons book they rated the 95 460 to have almost 20 more hp? Is there a difference between the two? I looked at the specifications and I cannot see any difference in them ie.. valves, cam lifts,pistons,etc....

Anyone know?

Matt

 

I wanted to let you all know that ... I like the book for the pictures lmao!!!!


Matt

 

heads changed in 93, much better, biggervalves, fast burn chambers.

 

E7TE and F3TE chambers are the same bathtub quench/wedge design. The F3 chamber is tighter to the exhaust valve and ever so slightly smaller. The F3 has a 2.1" intake valve vs the E7's 2.0" intake valve. The F3 intake port is offset to promote more swirl in the flow column where the E7 has a revised D3 intake bowl.

Both utilise a very small raised high velocity intake port passage of about 210 CC's where the doves are about 270 and the iron cj's are about 320.

There were some ECM changes in 93 that are also responsible for the increased power.

Regards,
SMJ/RHP
http://reincarnation-automotive.com
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Thanks for the info, would finding a 93 ecm build more power by its self? or does the ecm have to go with the rest of the parts? Would it hurt to through a 93 ecm in? My engine and heads run A-OK! (knockin-on-wood). Was curious as to why the power difference. Even if it gave alil more power with just the ecm change.

Matt

 

Unless you already have a later model ecm to try, forget it. They are not cheap even used and by itself would not result in much of a change (IMHO).

If you're anxious to get some more hp, put on a set of headers. They provide the best hp boost for the buck IMHO. The Banks Power Pack claims 70hp gain at the rear wheels and there are other header makers that are good but less expensive choices, look around.

-otf

 

Have you considered a Diablo Delta chip?

 

Shaking up this post!!!! Ok I have found a donor truck a 95!! I am going to start soon. Anyone have any tips or clues to working with the ECM?

 

92-94 E-series and F-series are plug and play interchangable, and the 95-96 ones are interchangable. The 95/96 EEC's have ODB-II, not a good thing for an older truck.

Anyway, each year, 92-94, the timing curve got more aggressive. Especially on automatic trans EEC's.

 

There is another choice of ECM that should work. 1994-1997 F53 (motorhome). EEC-IV (OBD-I), AIR, no cat, 245 HP.

Richard

 

Found this post and it makes me wonder. I've got the full Banks system on my 96 with no cat. Would I gain anything by going with this ECM?

 

Oddly enough I have the exact combinations. 1991 driver 4x4 and a 1995 parts truck complete, 2x4 blown transmission. going to be swapping out bed, interior parts, seat, and front clip.

Back to the EFI stuff though, would be swapping the MAP to MAF a worthy project? since I have the donor sitting right there?

 

20-year-old Zombie thread!

Just to clarify, the F3TE heads have slightly larger valves and 91.5cc chambers. E7s have 96cc chambers.
Pistons: The '93-97s have a piston with a .020" taller compression height (1.772") for a tighter quench in the quench side of the chamber to promote a better swirl and less chance of detonation, BUT they have a deeper dish in the open area of the chamber (15cc dish) as compared to the shorter earlier 1.752" piston that has a 8cc dish. The total combustion volume remains the same, thus they have the same compression ratio of 8.6-ish to 1...

Both the '91 and '95 use the same EEC-4 speed density, batch fire injection.

There was a CA-spec '96-97 7.5L that was EEC-V mass-air sequential injection. To change over, you need the entire firewall-forward body wiring harness from a CA truck, AND the PCM computer, AND the engine wiring harness, AND the injector harness, PLUS all of the various sensors... AND the CA-spec EGR tube with DPFE sensor, AND the special harmonic balancer spacer with the attached 'star' reluctor for the crank-position sensor, AND the CA-spec timing cover to mount the crank-position sensor...AND the CA aircleaner assembly to utilized the mass-air sensor...

 

wow, thank you much for the detailed response. looks like MAP it is. LOL. even though the parts truck is complete that is way more than needed.

one other question, if a guy were to put the 95 460 in the shop, flat top pistons and head work and such, does all the bolt holes in the block and heads and such, for stock bolt ons, fit from the 91 if I were to start the engine build ahead of time?

Thanks again

 

Hahahahaha