408cid + 2.6L KB = Lots of Torque
08-28-2008, 06:59 PM
#21
Well, the more efficient the engine, the more boost it will loose - but that's overall. What you guys are describing is a loss of boost in a specific range means that the blower has some restriction. I wonder if the 2.6L is enough of a blower. I think Whipple's 3.3L or even the 2.8L from KB would be a better starting point, especially for the 400+cids. It would help uptop and also help with those temps.
08-28-2008, 07:06 PM
#22
Thats been my contention all along. If the engine is very efficient, good heads, cam with some overlap, big motor, whatever, that the 2.6 just aint enough.
I've been told I was full of ****, the blower cant be running out, the belt must be slipping, etc. Even been told the blower should be capable of 1000 hp.
We're working on a 2.8 KB 383 right now. We'll see how that one fairs.
Again, sorry for the hijack.
I've been told I was full of ****, the blower cant be running out, the belt must be slipping, etc. Even been told the blower should be capable of 1000 hp.
We're working on a 2.8 KB 383 right now. We'll see how that one fairs.
Again, sorry for the hijack.
08-28-2008, 09:57 PM
#23
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This car has boost issues too. With a little porting to the blower inlet it could make well north of 775 RWHP. We lose about 4.5 psi from 4800-6500.
These numbers are on pump gas with no meth IAT's were around 150 deg @ 6500 rpms and around 120 deg while driving.
Id bet that 112 maggie @ 18psi is hot like the sun...
These numbers are on pump gas with no meth IAT's were around 150 deg @ 6500 rpms and around 120 deg while driving.
Id bet that 112 maggie @ 18psi is hot like the sun...
3500 rpms 15lbs, rwt 680
5000 rpms 15lbs, rwt 600
6500 rpms 13lbs, rwt 495
Meth really helps it stay cool.
08-28-2008, 10:00 PM
#24
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Trust me there is a restriction in the inlet. Jeff @ Total Performance Engineering on the corvette forum made over 800 rwhp with this blower and a 402 ls2. Talk with him he has a cnc program to port the inlet. Or talk with Beck here in Houston. He can build a sheetmetal intake that replaces the KB one.
I wanted to make the changes but the customer is more than happy with the car!
I wanted to make the changes but the customer is more than happy with the car!
08-29-2008, 06:02 AM
#25
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Trust me there is a restriction in the inlet. Jeff @ Total Performance Engineering on the corvette forum made over 800 rwhp with this blower and a 402 ls2. Talk with him he has a cnc program to port the inlet. Or talk with Beck here in Houston. He can build a sheetmetal intake that replaces the KB one.
I wanted to make the changes but the customer is more than happy with the car!
I wanted to make the changes but the customer is more than happy with the car!
Plus he has something to do later on when he gets bored
Good job G Force
Hell, I'd have enough trouble on street tires and my car is a wuss. 
09-03-2008, 06:04 PM
#37
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How do you guys like the part throttle torque of the KB? Predictable for when you have to pedal it?
Props on the car, the torque is that of a diesel, put a hitch on the back of it !!
Props on the car, the torque is that of a diesel, put a hitch on the back of it !!
09-03-2008, 08:15 PM
#38
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Its really on or off. As soon a you give it more than 1/4 throttle it makes 8-9 psi and 13 psi if floored. So it tends to do nothing but spin.
How you guys comming with the BS3 on the ls2 GTO? I have a car we are about to finish that we are thinking of swaping the engine controls over to BS3.
How you guys comming with the BS3 on the ls2 GTO? I have a car we are about to finish that we are thinking of swaping the engine controls over to BS3.
