dyno #'s after lt4 hot cam kit
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Horace Johnson (01-19-2021)
04-15-2007, 11:17 PM
#22
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Originally Posted by the_merv
You are getting robbed somewhere man, cause I am a Hotcam kit LT1, A4, 350ci, and I got 335/335..and that was through a slipping Tranny. All Dynojet numbers too.
04-15-2007, 11:52 PM
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Is it right for the dyno guy to only run the car through one gear and how do they typically do it?
he brought the car up to 30 m/p/h and then mashed the accelerator into overdrive and went up to 5500 r/p/m's and then shut it down. Thanks
he brought the car up to 30 m/p/h and then mashed the accelerator into overdrive and went up to 5500 r/p/m's and then shut it down. Thanks
04-16-2007, 12:08 AM
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Originally Posted by snk-huntr
Is it right for the dyno guy to only run the car through one gear and how do they typically do it?
he brought the car up to 30 m/p/h and then mashed the accelerator into overdrive and went up to 5500 r/p/m's and then shut it down. Thanks
he brought the car up to 30 m/p/h and then mashed the accelerator into overdrive and went up to 5500 r/p/m's and then shut it down. Thanks
04-16-2007, 12:28 AM
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Originally Posted by snk-huntr
Stock m6 lt1 cars dyno around 240-250 stock autos dyno between 225-235 We have had 7 of these cars stock and with full bolt ons and all lt1's are 275 crank hp how did you get that much hp from a cam that puts down around 30hp and headers that give around 12 andan exhaust maybe 5 that's a totalof about 42hp but we'll say 50 over stock should have put you at around 295-300, how do guys get so much more hp from the same parts on the same motor?? 
Tell me the secret. Or just let me use your dyno guy. We had a full bolt on 97 camaro ss m6 that only had 282 at the rear wheels.
Tell me the secret. Or just let me use your dyno guy. We had a full bolt on 97 camaro ss m6 that only had 282 at the rear wheels.
04-16-2007, 12:32 AM
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Originally Posted by DroppedM6Z
Wow...300 outta a cam'd LT1...i'd **** and cry my self to sleep. I made 314-351 bolt on RW. I hope it's an auto with a verter in it.....
04-16-2007, 06:45 PM
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We're gonna take it back in a couple of days, running it 3 times withthe e brake on and then just the once w/o we really should have better #'s, I'll post the next results after that dyno also.
04-17-2007, 10:07 PM
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Originally Posted by DeltaT
Take a look at Edelbrock's new LT4 airgap manifold when you get those heads.
Jim
Jim
04-17-2007, 11:38 PM
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Originally Posted by Boodyrider
IMHO, dyno operator should lock the trans in 3rd in the tune, and do a pull from 3000 to around 6300, then reload tune with original tables, and adjust shift points for the cam. Of course, my dyno guy is my tuner...
04-17-2007, 11:57 PM
#36
Originally Posted by snk-huntr
where should the shift points be for this cam?
FWIW, I have my rev limiter at 6400 and shift points at 6200 on a stock bottom end. It's too high for my car, which falls off badly at 5800, probably due to stock TB, stock intake, and shorty headers. My cam and ported heads ought to be making power up to at least 6500. I have more work to do.
I also have a built trans with tiny accumulators and a 3200 stall, as well as modified trans tables in the pcm, so my shifts are VERY hard and fast, IE less flare during a shift at WOT than a stock trans would have. A stock trans would need to be set a couple hundred rpm further below the rev limiter to avoid hitting the limiter in shifts.
If you have a forged bottom end, and the dyno shows power way up there, shift points can be as high as you and your engine builder are comfortable with.
Basic concept:
Determine where your rev limiter should be based on dyno and comfort level.
Set shift points enough below that to never hit the limiter under any trans temp/throttle position combination. Start at least 200 rpm below rev limiter, probably more like 400. Take into account you want to shift while still making great power, and after shifting be at or just below your torque peak.
Drive it for a while, decide where to go from there.
Short answer: depends on your setup.
And oh yeah... your dyno operator may not be comfortable making a pull to 6000+ if you don't have a forged bottom end because he may fear breaking stuff...
04-18-2007, 06:41 PM
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Originally Posted by the_merv
Cool..Mustang Dyno has a little bit higher numbers..
Get some LT's on it.
Get some LT's on it.