HP guestimates of new combo
#41
Stock GM valvetrain for now, Comp pushrods and Patriot ".660" Gold kit with titanium retainers
I'll try and shoot some video and put it up tomorrow.
#44
#47
Dyno session scheduled for Friday
If the weather holds out i'll be taking the Coupe to the chassis dyno friday evening after work. I'm not sure if I should post results here or in the Dyno section.....
#50
I actually drove the car to work...lol...to see how it ran on the street. Runs fantastic, coolant temp stayed below 180* with the Meziere electric race pump and its in the mid 90's here in Ohio today. The 8' 4700 stall doenst feel all that high unless i really snap the throttle hard. I really didn't think it would be very happy on the street with the big cam and high compression but its quite content.
I'm still on schedule to take the car to the chassis dyno Friday, hoping for some good results.
I'm still on schedule to take the car to the chassis dyno Friday, hoping for some good results.
#51
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Sounds awesome! I am in the middle of a very similar build but with PRC 237 Cathedral port heads and around 12.85:1 compression. Cannot wait to see your numbers! Also, what mufflers do you have on that car?
#52
Luke, I'm running Dynatech mufflers. They are a bit much on the street but it only gets driven to some car shows. Its mostly a drag car.
Ive still got the timing curve in it from the last motor, total timing was at 28 or 29*, I think this motor will want more timing.
I may also have to put more converter in it, the one in the car was designed for a big block on spray in a lighter car. It feels a bit too tight when the throttle is snapped.
Ive still got the timing curve in it from the last motor, total timing was at 28 or 29*, I think this motor will want more timing.
I may also have to put more converter in it, the one in the car was designed for a big block on spray in a lighter car. It feels a bit too tight when the throttle is snapped.
#54
Thanks man. I kinda wish i had 75 more cubes though...lol
Dyno time tonight!!!!!!!!! I'm not sure how the converter is going to affect the numbers but at least i can tune the jetting and timing curve. I had 28 total and all in by 3000rmp and it seemed sluggish but im sure some of it is the tight converter in it. Doesnt seem to even flash to 4000. It flashed at 5000 with a BBC on spray. Calling ATI soon to order the 5500 they speced for it.
Anyway, i changed the timing curve to 35* total all in by 2000rpm and the car is much more responsive and pulls harder so we'll see tonight.
Dyno time tonight!!!!!!!!! I'm not sure how the converter is going to affect the numbers but at least i can tune the jetting and timing curve. I had 28 total and all in by 3000rmp and it seemed sluggish but im sure some of it is the tight converter in it. Doesnt seem to even flash to 4000. It flashed at 5000 with a BBC on spray. Calling ATI soon to order the 5500 they speced for it.
Anyway, i changed the timing curve to 35* total all in by 2000rpm and the car is much more responsive and pulls harder so we'll see tonight.
Last edited by Kwikcad500; 06-10-2011 at 02:13 PM.
#57
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OH MY GOD, OH MY GOD, IM DYING HERE! LOL. Please, we need some freekin numbers...............................Jesus, lol. Your killing me dude....................killing me. Hope all went well. Eric L
#58
Sorry for the delay guys, busy weekend. Well it made the best power @ 37* total timing, all in @ 3000rpm. The converter is way tight and flashed @ 4800rpm.
Motor:
Gen 3 6.0 .005 over
stock 397,000 mile crank
untouched LS3 heads
untouched Edelbrock Victor jr intake
1" open spacer
1000HP carb
Wiseco 13.28 to 1 comp
K1 rods
248/256 cam on a 110lsa
factory lifters
Drivetrain consists of:
8" converter
28x10 slicks
T400 trans
Double Cardan factory driveshaft(weighs a ton!)
8.5 rear end
The air was shitty and it was raining, Dynojet dyno. Ok so for the results....
It made 481hp @ 7100(was still climbing but it hit the rev limiter @ 7200)
It made 387ft lbs @ 5600(kinda disapointed)
Dyno operator said my drivetrain losses were about 23%
That being said if i did my math correct comes out to 620hp and 500ft lbs @ the crankshaft.
I'll post more on the combo later with a dyno sheet and also post it in the dyno results forum.
I'm probably going to experiment with a smaller camshaft, this one @ .050 is 248/256 on a 110 lsa and .610 lift
Total investment with parts and machine work(I assembled the motor)is $3500, I had the starter, headers, carb, pan, and ign system from the previous motor. So for a low budget build its not too bad.
Motor:
Gen 3 6.0 .005 over
stock 397,000 mile crank
untouched LS3 heads
untouched Edelbrock Victor jr intake
1" open spacer
1000HP carb
Wiseco 13.28 to 1 comp
K1 rods
248/256 cam on a 110lsa
factory lifters
Drivetrain consists of:
8" converter
28x10 slicks
T400 trans
Double Cardan factory driveshaft(weighs a ton!)
8.5 rear end
The air was shitty and it was raining, Dynojet dyno. Ok so for the results....
It made 481hp @ 7100(was still climbing but it hit the rev limiter @ 7200)
It made 387ft lbs @ 5600(kinda disapointed)
Dyno operator said my drivetrain losses were about 23%
That being said if i did my math correct comes out to 620hp and 500ft lbs @ the crankshaft.
I'll post more on the combo later with a dyno sheet and also post it in the dyno results forum.
I'm probably going to experiment with a smaller camshaft, this one @ .050 is 248/256 on a 110 lsa and .610 lift
Total investment with parts and machine work(I assembled the motor)is $3500, I had the starter, headers, carb, pan, and ign system from the previous motor. So for a low budget build its not too bad.
Last edited by Kwikcad500; 06-14-2011 at 11:12 AM.
#60
Nice numbers. Do you think it'll make a little more HP when everything breaks in a little? Why did ya'll limit it to 7200? Not trying to give you a hard time, I'm just curious is all.