Some input on HP output with mods (LT4)
Safety Car
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From: North New Jersey
Team Owner
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From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
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Safety Car
Joined: Sep 2000
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From: Hinckley Ohio
http://video.google.com/videoplay?do...6037843700477#
I have the same 503 cam and few more mods
Good luck Thursday...have fun...let us know the results...
Video is always good
Last edited by LT4BUD; Dec 15, 2010 at 08:52 AM.
Thread Starter
Instructor
Joined: Oct 2009
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Should be more like 360-390 rwhp range
http://video.google.com/videoplay?do...6037843700477#
I have the same 503 cam and few more mods
Good luck Thursday...have fun...let us know the results...
Video is always good
http://video.google.com/videoplay?do...6037843700477#
I have the same 503 cam and few more mods
Good luck Thursday...have fun...let us know the results...
Video is always good
Le Mans Master
Joined: Dec 2006
Posts: 5,139
Likes: 482
From: H-Town Texas
http://grandsportregistry.com/dyno.htm
Here's a number of dyno results from stock to highly modified LT4's.
Here's a number of dyno results from stock to highly modified LT4's.
Thread Starter
Instructor
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Results are in from East Coast Supercharging! Along with video and pics. Turns out I am making 335 rwhp so about 385hp at the flywheel.
http://www.youtube.com/watch?v=U34nIzdL_ZY
http://www.youtube.com/watch?v=U34nIzdL_ZY
Safety Car
Joined: Dec 2008
Posts: 3,588
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From: North New Jersey
Nice! Cool Video and I was pretty close guessing! Not bad!
How was ECS? What did you think? Did they just do one run?
What exhaust do you have on there do you know? Is it headers with straight pipes?
How was ECS? What did you think? Did they just do one run?
What exhaust do you have on there do you know? Is it headers with straight pipes?
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Instructor
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Thread Starter
Instructor
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The exhaust on there now has melrose long tube headers.. random technology 3" pipes and RT bullet cats.
I have been reading that several LT4 owners have gotten their HP around 350-380 RWHP without engine work. Basically all bolt ons. Thats where im looking to get to I just need some guidance on what to change.
Team Owner
Joined: Oct 2004
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From: altered state
St. Jude Donor '05
Youre going to have to do some digging at this point to pick up another 30 hp unfortuntately
Porting the heads intake and touch up your tune will get you there easily.
Porting the heads intake and touch up your tune will get you there easily.
Safety Car
Joined: Dec 2008
Posts: 3,588
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From: North New Jersey
Im glad to hear it... I just wish they could tune our cars! They seemed really nice at the meets and their vettes were insane! The lope of the cam in the red one with the carbon fiber hood is insane! Glad to hear it went well!
Advanced
Joined: Jun 2009
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From: Lake Junaluska North Carolina
without a dyno tune say 350 SAE and 300 RWHP. Get it on a dyno and see how close the guestimates are.... We would also want to know if it is a dynojet or mustang dyno... I would also say if prev. owner of this car had it tuned he or she had a printout of the dyno results. If you do get it tuned get the shop to also print the AFR on at least the final run. this will be very helpful to you in the future...
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Instructor
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without a dyno tune say 350 SAE and 300 RWHP. Get it on a dyno and see how close the guestimates are.... We would also want to know if it is a dynojet or mustang dyno... I would also say if prev. owner of this car had it tuned he or she had a printout of the dyno results. If you do get it tuned get the shop to also print the AFR on at least the final run. this will be very helpful to you in the future...
I plan on doing some more... which is why im trying to do my homework now and figure out what needs to be done/focused on
Le Mans Master
Joined: Dec 2006
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From: H-Town Texas
I know that the previous owner did get it tuned after all the mods were done... but that it was never dynoed. Thats why I had it done today so I could see exactly where it was.
I plan on doing some more... which is why im trying to do my homework now and figure out what needs to be done/focused on
I plan on doing some more... which is why im trying to do my homework now and figure out what needs to be done/focused on
Safety Car
Joined: Sep 2000
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From: Hinckley Ohio
Wonder what "tune" he had done???
Your cam, headers, hi-flow cats, 3" exhaust with a mild head work ought to get you to an easy 360 RWHP.
Is the horsepower SAE corrected??
The video was cool...nice car
Drifting
Joined: Oct 2005
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From: Angier nc
I did'nt see an A/F ratio graph so you don't really know if your tune is spot on.I would'nt have expected him to make adj. for the price quoted but I would expect to see where you are at A/F ratio wise.
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Instructor
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I would start a serious search for a good dyno tuner. If the prev. owner had a tune but not on a dyno, there is probably still a significant amount still on the table. I bet a dyno tune would unleash more than a couple of ponies, especially on the top end. I'm not the expert, but basing this guess on conversations with the guy that was going to dyno tune mine until I ran into a personal recession. He basically described it as a two part process. First step was the partial throttle tune done just with software, than the dyno to dial everything in especially WOT. He said he would usually get 20-40 ponies depending on mods. But I take that as hear/say. At the very least you would know that you are getting the peak and may get an idea of where the weakness lies. I'm hoping to get it done this spring or sooner.
