What If.

[packman]

I am thinking of creating a "what if" budget for the CV after I get it painted. I am thinking of slowly saving up for a 302 build if anything should happen to the stock lopo. I have a few questions (as always) about the lopo build. 1) What are the specs for the stock lopo heads ('86)? I am thinking of getting a rotating assembly out of Speedwaymotors (part # 915-305, I think) and using a lopo block with the stock lopo upper end. 2) Will the rebuilt short block cause grief with the computer? 3) If I add some AFR 165s and an Edelbrock Performer intake, a conservative performance cam, and all the other stuff that I need for a semi-decent upper end, will this be too much for a stock block? I don't think it will go above 275hp-300hp so I think this should be safe with the lopo block. This is also taking into account that I will have to change the computer over to mass air. I would be looking for a bit of torque for this heavy car. Though, this is just a "what if" scenario in case something should happen after I put money into making the car look good.



Packman

[mrltd]

rebuilt shortblock, no problems its STOCK

400-500HP is where the block has issues.

With the heads, cam and intake then the computer will have issues. Mass air is NOT required. A speed density mustang ECU would work- with a tune.

[packman]

Ah, cool, a Mustang SD. I was doing the math and it wouldn't cost much to do this, nor would it take too much time to save up for with all of the other projects around here.


Packman

[mrltd]

It'll prolly be more than you think. Depends on what you plan on using for the topend.

[packman]

AFR 165cc intake runner aluminum heads, Edelbrock EFI Performer 5.0 intake (or whatever intake that can be reversed for Panthers), 65mm throttle body, bigger fuel lines, Mustang in-tank fuel pump, and some sort of home-made CAI. That is the basic stuff. There is more, but I am too lazy to type it out. This is not set in stone; just a back up plan. I really want to get the other projects moving since I can't mod the CV anymore.


Packman

[mrltd]

I don't think the fuel lines are needed....

underdrive pulley, HD waterpump, Some kind of tuner or chip/dyno tune....

[packman]

Does anybody know the specs of the stock '86 EFI lopo heads? Intake runner size, combustion chamber, etc....or do I have to go get a pair and measure it for myself.



Packman

[gadget73]

runner size and such are the same as an E7 head, chamber is 69cc I believe.

[packman]

runner size and such are the same as an E7 head, chamber is 69cc I believe.

Thanks for the info. The combustion chamber size is that large? Damn, I need to tighten that up a bit. I wonder.........hhhhhhhmmmmmmmm................I'll have to mull this one over.



Packman

[gadget73]

yeah E6 chambers are huge. The valves are sucked way inside the head. The compression bump is another reason why E7 heads perform better, that and the valves aren't so heavily shrouded. The high swirl on an E6 probably does make for some extra torque at low rpm and in motors without a big cam (sound familiar?) but outside that, they're sort of useless. Heck, the trucks even quit using them after only 1 year so that should tell you something.

[Mercracer]

rebuilt shortblock, no problems its STOCK

400-500HP is where the block has issues..

If a E6 (roller) block has issues at 400-500HP, that means someone is using a power adder and is a complete idiot with the tune... These blocks live just fine at 500HP.

[mrltd]

If a E6 (roller) block has issues at 400-500HP, that means someone is using a power adder and is a complete idiot with the tune... These blocks live just fine at 500HP.

Yeah, that's true. Hence why I said it. Guess I could have said RWHP and made it a bit better.