C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Dyno question...

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Old Oct 9, 2002 | 11:50 PM
  #1  
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Default Dyno question...

Took the car to get it dynoed last weekend. My best pull brought me about 254.2rwhp@276.8max torque. Does this sound right? I was hoping for more torque with this converter and this seemed a little low. My mods are listed in my sig. Nothing really done to the engine...just converter and gears. My Hp was what I expected but was a little dissapointed in torque. Am I wrong. Toward the end of the run my graph tended to flutter a little where most cars smoothy down slope on the graph after fuel cutt off. What could this be from? Any replys are much appreciated :seeya

See graph farther down the page...


[Modified by RadPolo96, 11:41 PM 10/10/2002]
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Old Oct 9, 2002 | 11:56 PM
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Default Re: Dyno question... (RadPolo96)

With a B&B TriFlo exhaust, cut lid, K&N, MSD 6A, NGK Plugs, Taylor wires my '94 dynoed 253rwhp and 296tq. So you're right along the same area. Remember also that you have a little more loss through the auto than us manual tranny guys do. Torque convertors can have an odd impact on the #'s an auto car dynoes if you don't hit it just right.

Without seeing the chart,...I'd hate to speculate on what could be going on in the upper RPMS.
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Old Oct 10, 2002 | 12:00 AM
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Default Re: Dyno question... (RadPolo96)

Sounds right on HP, whats the flywheel torque rating on the 96 LT1? 330?

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Old Oct 10, 2002 | 12:32 AM
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Default Re: Dyno question... (vader86)

Where did you get it dynoed?
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Old Oct 10, 2002 | 12:58 AM
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Default Re: Dyno question... (RadPolo96)

Yo, if you dont work tomorrow, bring it by my work and Ill have it scanned so you can post the dyno chart.
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Old Oct 10, 2002 | 01:05 AM
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Default Re: Dyno question... (VetteNoob)

Yo, if you dont work tomorrow, bring it by my work and Ill have it scanned so you can post the dyno chart.
Yeah, im off tomorrow. Ill bring it by. Hopefully you guys will be able to see exactly what Im talkin about.
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Old Oct 10, 2002 | 02:13 AM
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Default Re: Dyno question... (RadPolo96)

A torque converter will generally make you lose more on the dyno, even though they are a benefiet to your launch and acceleration.
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Old Oct 10, 2002 | 02:22 AM
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Default Re: Dyno question... (RadPolo96)

A torque converter doesn't increase the torque output. It basically lets the engine rpms raise for an higher hp/torque range on acceleration.
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Old Oct 10, 2002 | 04:52 PM
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Default Re: Dyno question... (merrick)

Those numbers are just about the same as mine were with my 92 Auto. (After Mods) Although, mine was running way too rich at the time. I need to run it again after the re-tuned chip.
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Old Oct 11, 2002 | 12:22 AM
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Default Re: Dyno question... (dscottr)

Ok, here is the dyno chart. What I am concerned with is the way it jumps and dips toward the end. This cannot be normal. If anyone has a clue, let me know.

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Old Oct 11, 2002 | 01:55 AM
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Default Re: Dyno question... (RadPolo96)

Are you getting any knock retard?
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Old Oct 11, 2002 | 01:58 AM
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Default Re: Dyno question... (65Z01)

Not that I know of.
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Old Oct 11, 2002 | 11:49 AM
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Default Re: Dyno question... (RadPolo96)

ttt
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Old Oct 11, 2002 | 11:50 AM
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Default Re: Dyno question... (RadPolo96)

Looks like maybe you have some ignition issues. How long has it been since you have changed plugs and wires?
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Old Oct 11, 2002 | 12:27 PM
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Default Re: Dyno question... (DRAGRACR)

I havent changed my wires or my plugs.
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Old Oct 11, 2002 | 01:40 PM
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Default Re: Dyno question... (RadPolo96)

Anymore input? :seeya
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Old Oct 12, 2002 | 12:13 AM
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Default Re: Dyno question... (RadPolo96)

So if it is the plugs and wires, how hard is it to change. They look like a pain the butt to get to.
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