Help me rebuild this to 750 whp
Planning to get started on the blown LT4 in the next few weeks. The shop that scoped it can't be sure, but think replacing the pistons and rods and honing the block may take care of it.
Car last dyno'd at 688 whp with a 9.1 lower, ported tb, rf, 45% ethanol tune, kooks, jam aux booster. Looking to shoot for 750whp with putting in a 32% cam and porting the factory blower. What else should I be looking at doing besides the upgraded oil pump in hitting that number and living a long and healthy life? |
Save the money and buy a Maggie 2650 and sell your Lt4. Easy 750 and you still get money back on your 1740 blower. Go for it.
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NOT doing the Maggie, unless my son wants to go to that expense and go for 850whp and all the other items needed for that.
Already have kooks LT's and planning on a bigger tb and the big gulp. |
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Cam Heads 103mm nw RF big gulp Ported blower Headers May need better low side to run more ethanol. |
What are 750rwhp zl1s running 1/4?
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More useful answer: anywhere from high 8s to low 11s depending on the mods, driver and phase of the moon. Internal mods seem to give up to 0.4 improvement over otherwise unmodified internals. See also: https://www.camaro6.com/forums/showthread.php?t=427506 :happy0180: |
Probably running really low 10s. My SS with 2300 Maggie made over 750 and ran its best 10.00@139 before I rebuilt the motor and did the 2650 Magge.
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Curious to why limiting yourself to a 32% fuel lobe cam? Check out the BTR cams with their 38% lobe. Extra 6% for same price range. Is your car an A10 or M6? Auto go with BTR stage 2, and M6 you could do stage 2 or 3.
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LPE HPFP, 43% cam, +30 injectors if you plan on continuing to run Ethanol.
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I have just a 32% cam and aux low side and I can run up to E40. |
Budget rebuild with 1200 hp capability
Polish Crank $250 Summit rods SUM-LS6125927 $566 Mahle Pistons 930228370 $900 comes with rings Rebalance Asm and ASM $2400 Ported heads $499.00 https://shop.katechengines.com/produ...er-heads-pair/ (if your only interested in 750 no need to spend the money on Inconel exh valves. Of course this is you doing disassembly and Reassembly mark the valves, buy new seals, spring compressor, and .660 lift spring retainer kit. .660 spring kit $229 -$450 (BTR or Comp) CHE 4920 trunnion upgrade $230 Push rods $100 Lifters Johnson, morel, or LS7 on that order (LS7 12499225) $180 to 200 LS trays 12595365 $9 to 11.00 Head Gaskets 12654622 $50 to 60 each Camshaft GT35 with 7.85 fuel lobe L210287515 $540.00 Camshaft I like the LPE stuff with the 42% lobe and there Big Bore pump or Ryne Cunningham has his stuff that based on same lobe. Cam phaser lock AMP Gen V lock out BTR cam phaser $50 (not a limiter) Cam bolt 12681018 $36.00 Timing Chain C7R by Hinson HMI-C7-RCHAIN $150 Water pump Gaskets 12657430 $3 or 4 bucks ea. LS Crank seal 12585673 $26.00 LT4 Exh gsk 12657093 $6.48 each Optional: Big bore pump L710166914 $1800 FIC plus 30 injectors $2200 If you do not do the LPE fuel parts get a cam with 38% and reuse the LT4 fuel parts |
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The LS7 lifters arent that good...88958689 is the "upgrade" for the LS7 from GM. I didn't realize these would work in a LT4 though (although I also never looked into it). https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 |
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