ET/Dyno hp/tq # guestimates for a 6.0L powered C4 Corvette
01-21-2009, 10:33 PM
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ET/Dyno hp/tq # guestimates for a 6.0L powered C4 Corvette I have finally made up my mind on the set up that I will finally have in my old C4 within a month or so. Here are my mods:
6.0L iron block LQ4 bored .030 over (370 cubic inches)
Aftermarket flat top pistons
Static compression ratio around 11:1
TSP CNC ported 243 heads
MS3 cam on a 112 LSA
LS6 Intake with stock ported TB
4L60E with a 9.5" 4000 stall Vigilante torque converter
Stock 3.07 gears...
Weight reduction to 3000 lbs with driver
So what ETs/trap speeds can I expect on a good launch with some sticky tires? What #s would be reasonable to expect on the dyno once tuned?
6.0L iron block LQ4 bored .030 over (370 cubic inches)
Aftermarket flat top pistons
Static compression ratio around 11:1
TSP CNC ported 243 heads
MS3 cam on a 112 LSA
LS6 Intake with stock ported TB
4L60E with a 9.5" 4000 stall Vigilante torque converter
Stock 3.07 gears...
Weight reduction to 3000 lbs with driver
So what ETs/trap speeds can I expect on a good launch with some sticky tires? What #s would be reasonable to expect on the dyno once tuned?
01-23-2009, 02:15 PM
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well its gunna be a nasty ride thats for sure, but i'm not sure with the MS3 and 4k stall cause im sure that stall will be soaking alot of HP up, but im no expert.
01-24-2009, 04:40 PM
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How much power would the torque converter choice suck up? One of my race buddies says to use a 4000 stall because of the size of this cam. If I used anything lower, it would make the car bog on the low end. Any takers on this? How does a 3500 stall sound if a 4000 is too much?
01-25-2009, 11:22 PM
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That would be a freakin accomplishment! I'd just hope that those 24 extra cubic inches over LS1/LS6 combos would be worth it. For both a complete LQ4 engine build + heads + 4L60E conversion, rewiring, etc, I'm already budgeting $11,000 cash, hopefully less in this LSx C4 conversion.
Anyways, I see a lot of 450+ rwhp 346 cubic inch LS1 cars here but all of them dyno those numbers as a 6 speed manual car. Anyone here know the difference in rwhp power loss on an automatic vs manual car?
Anyways, I see a lot of 450+ rwhp 346 cubic inch LS1 cars here but all of them dyno those numbers as a 6 speed manual car. Anyone here know the difference in rwhp power loss on an automatic vs manual car?
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01-28-2009, 08:34 PM
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So if this motor will make 450 rwhp through a manual, then it would make about 425 rwhp through an auto. Doesn't sound like too much of a loss. I hope I make at least 400 rwhp. If not, I would feel like I wasted $11,000 on something I could have gotten a Gen 1 small block 383 stroker would have done with half the cost. But we shall see... 
