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Old Apr 16, 2012 | 12:09 PM
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Default 1/4 Times seem low

Have a 6.0L Truck motor with The Trickflow 550HP/470FT/LB Kit on it (The compression is slightly lower do to the dish pistons), with 1 3/4 headers and a ls6 manifold and a tune. I took the car out to the track weekend and only went 11.099 on motor. The car weighs 2800 with me in it, everywhere ive looked online says about 400 hp are hitting the ground. This is not a new car to me and i know how to drive it, Previously the car has gone 9.17 @ 149 and a carbed/nitrous motor. where is all my power? my A/f is 12.5 and my timing is 27-28 degrees. what am I missing, My converter slippage is around 15 percent i know that is a little high but loosing 150 Hp thru the drivetrain doesnt sound right. The trans is a TH350 and the rear is a ford 8.8

Kyle
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Old Apr 16, 2012 | 12:21 PM
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where do you think your compression is at? also a dyno would be a good idea to see what power you are putting down at the wheels.
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Old Apr 16, 2012 | 12:25 PM
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what was your trap speed and what 60 ft was you pulling for that combo you are running that dont seam to be to bad low also twick flow runs very conservitave cams in there kits
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Old Apr 16, 2012 | 12:52 PM
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Originally Posted by dodson55
what was your trap speed and what 60 ft was you pulling for that combo you are running that dont seam to be to bad low also twick flow runs very conservitave cams in there kits
this isnt a very heavy car 2800 thats near 1000 lbs light then a f body...
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Old Apr 16, 2012 | 12:53 PM
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Originally Posted by Austinma62
where do you think your compression is at? also a dyno would be a good idea to see what power you are putting down at the wheels.
10:1 vs an ls2 at 10.86:1
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Old Apr 16, 2012 | 02:50 PM
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Question ??????

As I understand the combo:
Heads and a cam in the Trickflow "kit", plus an LS6 intake, headers, on an LQ4 engine at 9.4 compression. The LQ made about 300 FW, to begin with. I'm betting there's nothing wrong w/ the performance, and doubt seriously that the add-ons added approx 250HP. Yes/no???
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Old Apr 16, 2012 | 02:59 PM
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Rhys really not bad for a stock intake and 1 3/4 headers u swap to fast and a 1 7/8 header if it will fit in ur setup and you will run 10s
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Old Apr 16, 2012 | 03:14 PM
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it seems that for the hp claim that trick flow has (wich is on a ls2 manifold and 1 3/4 headers) my numbers are way low or im loosing an *** load of power in the drivetrain. this thread isnt a how to run a 10, im looking for suggestion on where to look
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Old Apr 16, 2012 | 03:18 PM
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it seems that for the hp claim that trick flow has (wich is on a ls2 manifold and 1 3/4 headers) my numbers are way low or im loosing an *** load of power in the drivetrain. this thread isnt a how to run a 10, im looking for suggestion on where to look
Did TF make that power claim on an LQ4 bottom end with low compression dished pistons or on and LS2 bottom end with high compression flat top pistons?

Also, you have a TH350 with a torq converter and built rear end...I would not be surprised if you lose ALOT of power through that stuff on the dyno.
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Old Apr 16, 2012 | 03:23 PM
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Originally Posted by Old Geezer
As I understand the combo:
Heads and a cam in the Trickflow "kit", plus an LS6 intake, headers, on an LQ4 engine at 9.4 compression. The LQ made about 300 FW, to begin with. I'm betting there's nothing wrong w/ the performance, and doubt seriously that the add-ons added approx 250HP. Yes/no???
reguardless of what the car started with, the numbers that trickflow publish are for a stock ls2 i wouldnt think .86:1 in compression would be equal to ~72 hp or .5 in the 1/4. or am i wrong in that assumption?
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Old Apr 16, 2012 | 03:34 PM
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that kit is rated at 550 flywheel and i would think you should be mid 400 to the wheels...what was ur 60 ft and ur mph trap?
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Old Apr 16, 2012 | 07:12 PM
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just like go on 3 said the hp is rated at the fly wheel not at the rear tires. When i first saw the package i was pretty amazed at the power they claimed and then i realized thats at the fly wheel. Get you car put on a dyno and your questions will be answered.
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Old Apr 16, 2012 | 10:19 PM
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I guess trans slippage. Also .85 is nearly 10 % less compression...quite alot
of torque loss.
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Old Apr 16, 2012 | 11:10 PM
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15% is way high for converter slippage. Are you sure it isn't busted?
Imagine how bad it would be if you were spraying.
8% is more typical. Less on the better converters.

For the rest of you guys. 11.0 is approx 120mph in most cars. OP didn't mention his mph. That will be a clue.
HP and ET don't always match. HP (at the tires) and mph always do.

Ron
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Old Apr 17, 2012 | 09:14 AM
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you should only be losing .7 compression ratio and im just guessing but that would only be maybe 15hp at best the biggest thing i have against the trick flow kits is there cam choice but what kind of 60 and trap speed did it pull also may not be tuned to its full potential
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Old Apr 17, 2012 | 10:37 AM
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Originally Posted by dodson55
you should only be losing .7 compression ratio and im just guessing but that would only be maybe 15hp at best the biggest thing i have against the trick flow kits is there cam choice but what kind of 60 and trap speed did it pull also may not be tuned to its full potential
trap was 120.9 on the 11.099 pass

1.468 60'
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Old Apr 17, 2012 | 10:37 AM
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did a ohm out of my wires last night, 285-285 on all the same lenght unit and 320 on the one that about 2 inches longer, so that checks out

Also did a compression test 155-165 across all cylinders.

the only thing i saw that was slightly odd was this, ive heard i might be the additives in the fuel but it only showed up on 2 or three cylinders on the drivers side towards the rear most cylinders


[/quote]
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Old Apr 17, 2012 | 12:15 PM
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Pretty rusty on the plug!? what fuel are you using? 120mph at 2800 is dead on at 400whp. It's what I ran for years. ET was slower though

550 crank hp, less compression and such, say 520. Less drivetrain and excessive 15% loss = good guess at right around 400whp. Fix plug problem, go back to nitrous, rock and roll.
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Old Apr 17, 2012 | 11:46 PM
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May not matter but you running a 4corner steam vent to keep the combustion chambers cooler?plugs do look worn but more than likely I think it's a converter issue as well.
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Old Apr 18, 2012 | 12:57 PM
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100 street blaze fuel

put new plug in, no projected tip, ran a nitrous pass the strap heat look good to me.

also checked all cylinders with a temp gun all read about the same

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