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Post by STU on Oct 20, 2005 20:39:11 GMT -5
Once I get the twin-turbo's on my 357W the ported 351W DOOE heads I just bought will be going in my 63. Here's my planned combo, how much HP do you think it's gonna pump out? 1994 roller 5.0 HO stock short-block (hypers and 9.0:1 comp) heavily ported 1970 351W DOOE heads 1.6 roller rockers E-303 cam Weiand Stealth intake Ceramic coated Hooker Super Comp LT headers 600 Holley V.Sec. Duraspark-II dizzy 8mm Taylor wires Accel Super Stock coil Crane HI-6 ignition My current combo made this at the wheels through a C4: 1994 roller 5.0 HO stock short-block (hypers and 9.0:1 comp) mildly ported E7 heads (exhaust only) 1.7 roller rockers HO cam Weiand action plus intake Ceramic coated Hooker Super Comp LT headers 600 Holley V.Sec. Duraspark-II dizzy Accel Super Stock coil 8mm Taylor wires MSD-5  |
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Post by ca on Oct 21, 2005 15:33:09 GMT -5
lots of variables in there but if ya dont double the HP you're already makin then you're doin sumpthin wrong. you aint gonna be usin them supercomps anymore so my address is ......... ;D
gonna need to o-ring the block or heads for serious HP and forged pistons and more carb and an intercooler(aftercooler).
find the book called "turbochargers" by Hugh MacInnes. i've had a copy since "79 and its STILL the best book you can find on TB's
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Post by w2zero on Oct 21, 2005 16:53:07 GMT -5
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Post by STU on Oct 21, 2005 16:54:30 GMT -5
Nah, the TT-357W is for my drag car project. I can't use the DOOE heads on the 357 with the turbo's because they bump the compression ratio from a boost friendly 8.56:1 with my E5 heads to an un-friendly 9.30:1 so that's why they are going on the 5.0 in my Merc. The 357 is gonna have twin Borg-Warner GM 6.5 diesel turbo's with an intercooler and methanol injection. I plan on running 10-15psi of boost and I'm looking for 600+HP on pump gas. I have the book - Maximum Boost by Corky Bell, it's very good and up to date. My TT-357 combo is: 351W, bored .030" over (357-CID) re-conditioned stock rods Speed-Pro .030" forged pistons 8.56:1 with ported E5 heads stock 1.78/1.45 valves with Crane springs, .544" lift max capable. Twin GM 6.5L diesel turbo's Weiand Stealth high rise dual plane intake Boost referenced fuel regulator Holley 750cfm dual feed carb, double pumper Stock Duraspark-II dizzy (without vac adv), Accel cap/rotor kit Crane HI-6S ignition - will have a boost timing controller too. Holley lasershot pro-strip coil Comp Cams 280H grind, 230 duration @ .050 and .512" valve lift. double roller timing set flipped shorty headers 9mm FRPP plug wires As for my 5.0, the super comps are staying, I paid too much for them.  Don't forget those HP numbers are at the wheels, ya gotta add about 50-55HP to that 207.7 figure to get the crank HP. That put's my stock cam 5.0 at about 260HP, not too bad in my opnion. The heads , high rise intake and cam should put it over 300HP at the crank. The dyno numbers will be a little skewed though, these came from the old 8" diff, the new 9" diff eats a little more HP. |
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wbw2
New Member
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Post by wbw2 on Oct 23, 2005 19:09:56 GMT -5
with that cam and heads, I would definitely go with at least a 650 or 700 carb, looks like it might starve a little HP if you don't. I have that E303 cam in my 92 lx, and I needed to up the fuel pressure, well, need really wasn't the word, but you know how it is... |
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Post by STU on Oct 23, 2005 19:19:12 GMT -5
I did the math and a 600 carb should feed a 302-CID engine up to 6900rpm, way above what I'll be revving my 302. I think the E-cam and those heads should give me just over 300HP, I'd like to have a 302HP-302 engine. ;D...I'll have the car dyno'd again once all the parts are on, then I can figure out the HP loss incurred by a 9" diff and a C4 tranny so I can get a flywheel HP.
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Don't forget those HP numbers are at the wheels, ya gotta add about 50-55HP to that 207.7 figure to get the crank HP. That put's my stock cam 5.0 at about 260HP, not too bad in my opnion. The heads , high rise intake and cam should put it over 300HP at the crank. The dyno numbers will be a little skewed though, these came from the old 8" diff, the new 9" diff eats a little more HP.
