Had the GS dynoed today????
Thread Starter
Le Mans Master
Joined: Feb 2001
Posts: 6,022
Likes: 37
From: SW Fla
Had the GS dynoed today????
Had the GS on the dyno today. 299 RWHP/316 ft lbs torque. With the mods in my sig, does this seem right. I would think I could do better than this. Discuss please.
Drifting
Joined: Mar 2004
Posts: 1,522
Likes: 0
HP seems a little low, could have just been the dyno. Was it a Mustang or Dynojet?
That's not to far off my stats, and we have pretty much the same mods. I could see my flywheel making the 15ft lbs torque differance.
That's not to far off my stats, and we have pretty much the same mods. I could see my flywheel making the 15ft lbs torque differance.
Le Mans Master
Joined: Aug 2002
Posts: 6,080
Likes: 3
From: Clearwater FL
St. Jude Donor '06
The 4.10's will drop the #'s a little, but this should be more than made up for with the longtubes with no cats. Did you get it tuned for the LT's w/o cats? If you are running 315's out back and/or have heavier rims, the #'s can be lower as well. I'd think youd be in the 320-330 range...
Thread Starter
Le Mans Master
Joined: Feb 2001
Posts: 6,022
Likes: 37
From: SW Fla
I have 315s out back, but Fikse wheels which are (or should be) lighter than stock. Baer 2 piece rotors which (I was under the impression are lighter than stock). Im not sure if they tuned it for no cats, will have to check, but Im sure I must be putting down more than this. I have seen a number of stock LT4s putting these numbers down.
Team Owner
Joined: Sep 2001
Posts: 62,153
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
The headers and exhaust work shouldve put you at about 320-330rw or thereabouts. I agree something is up, but some dynojets do read differently.
What did the curve look like, was it smooth or choppy?
What did the curve look like, was it smooth or choppy?
Safety Car
Joined: Sep 2000
Posts: 3,524
Likes: 4
From: Hinckley Ohio
I did 299rwhp with 4.10 gears....stock exhaust manifold & cats.....on a dynojet......other mods similiar to yours
My torque was also more or less same as your 316
Seems you are around 20hp low......did you record A/F....
What rpm did you get peak hp
My torque was also more or less same as your 316
Seems you are around 20hp low......did you record A/F....
What rpm did you get peak hp
Last edited by LT4BUD; Apr 6, 2005 at 09:57 PM.
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Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Originally Posted by LT4BUD
I did 299rwhp with 4.10 gears....stock exhaust manifold & cats.....on a dynojet......other mods similiar to yours
My torque was also more or less same as your 316
Seems you are around 20hp low......did you record A/F....
What rpm did you get peak hp
My torque was also more or less same as your 316
Seems you are around 20hp low......did you record A/F....
What rpm did you get peak hp
Safety Car
Joined: Sep 2000
Posts: 3,524
Likes: 4
From: Hinckley Ohio
Originally Posted by LD85
Was this with a stock bottom end
The bottom end is still stock, but now many mods.....last dyno was solid 365rwhp.....since I have added long tube headers, high flow cats, aluminum damper with underdrive pulley.........dyno tuning coming May14...new hp=???
figured i'd find you here 
Call me at work tomorrow (email if you forgot the number) and i'll give you some possibilities that i encountered.
Drifting
Joined: Mar 2004
Posts: 1,522
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Just to give you more info about my dyno for your comparision.
Mine was done on a dynojet, I have 315, on A-molds (not sure who made them), I have non-stock rotors (their cross-drilled and slotted, again not sure who made them), and my peak hp was at 5700 - 5900rpm (it varied by only .4hp over that range). At 5600rpm I was just .9hp lower than 5700 I still have the stock 3.45.
Keep us updated on what you find!
Mine was done on a dynojet, I have 315, on A-molds (not sure who made them), I have non-stock rotors (their cross-drilled and slotted, again not sure who made them), and my peak hp was at 5700 - 5900rpm (it varied by only .4hp over that range). At 5600rpm I was just .9hp lower than 5700 I still have the stock 3.45.
Keep us updated on what you find!
Safety Car
Joined: Sep 2003
Posts: 3,692
Likes: 5
From: Hayward CA
Perfusion made 324hp/325tq with his stock LT4 with K&N, EM long-tubes, cats, and Corsas --- running very lean. I made 297hp/311tq with just Corsas and an X-pipe. With your headers, and no cats, you should be 20-25hp over stock.
EDIT:
Perfusion - we must have been posting at the same time
EDIT:
Perfusion - we must have been posting at the same time
Race Director
Joined: Feb 2003
Posts: 18,484
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From: Everyday you must choose between the pain of discipline and the pain of regret. Fredericktown, OH
My LT-4 made 305 with 3.45s and stock exhaust manifolds on the same dyno that LT4Bud's made 299.
I agree you are a bit low. With the headers minus a touch for the gears, I'd think you'd be in the 310 to 320 range.
I agree you are a bit low. With the headers minus a touch for the gears, I'd think you'd be in the 310 to 320 range.
Pro
Joined: Sep 2000
Posts: 599
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From: Tampa,FL
Just FYI gents..the rear gears will not effect his peak HP. It may effect the RPM range at which he achieves peak numbers but as long as he maintains a 1:1 ratio (all relevant to the trans gearing which should be in 4th gear), it shouldn't be a factor