Dynoed LT4. Poor result
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From: Kennesaw, GA www.96LT4.com
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From: Riverside County Southern California
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Something wrong for sure. The Ghost as a LT4 (350 CID) Dynoed at 303 RWHP on a main line dyno.
Thread Starter
Safety Car
Joined: Sep 2006
Posts: 4,129
Likes: 1
From: Pasadena CA
More background:
I only put Chevron '91 in it. I've been commuting to work again for a month now, so there's no older left gas in the system.
Fuel pump is only a couple of years old, ditto plugs and leads.
I recently spray-cleaned the throttle body, seemed to be working fine.
Opti and wp were new on the car when I got it 6 yrs ago, at 81k. I have a new GMPP pump sitting there ready to go, I will order an opti, fuel filter and put them all on (my hunch is I've had opti problems for while now).
I'll see about a different dyno tune then, and post. I did not get any a/f info at this place, it was purely a cheapo dyno day.
I wanted the FIC injectors anyway, I will do that next.
I wanted a hotcam anyway, I will do that and springs next.
I will then either have a big smile on my face or will have the car in the For Sale section
Last edited by Eakster; Mar 5, 2013 at 05:08 PM.
Racer
Joined: Sep 2007
Posts: 493
Likes: 0
From: Eden Utah
My l98 dyno'd 220 on a Mustang dyno in Phoenix, if that would have been a dynojet would have been a minimum of 240/250
Safety Car
Joined: May 2002
Posts: 4,659
Likes: 82
From: Toronto ontario
My opinion Is to seriously try to disregard those numbers. Dynos can wreak havoc on the mind and the wallet. I'd go to the strip and pull off an easy pass. Don't launch it hard to minimize breaking anything and just see what the mph is. It will tell you a lot more than a dyno. If you see any other stock cars see what their mph is like and compare it to magazine/online results that you find.
Locally I'd hope to see 103-107 mph from a stock lt4 if I had one.
Locally I'd hope to see 103-107 mph from a stock lt4 if I had one.
Burning Brakes
Joined: Apr 2007
Posts: 1,178
Likes: 15
From: Montreal Quebec
Mine dynoed at 328.xx rwhp last summer with only muffler eliminators done to it at the moment...
I did 12.93 at 110.30mph at the strip with a .270 reaction time!
I did 12.93 at 110.30mph at the strip with a .270 reaction time!
Last edited by LT4 F45; Mar 6, 2013 at 08:35 PM. Reason: Drag result
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Safety Car
Joined: May 2002
Posts: 4,659
Likes: 82
From: Toronto ontario
However it doesn't help the op at all. Boasting about your numbers isn't helping him figure out if there's something wrong with his car. If you want to help how about you go and dyno your car back to back with his. I wouldn't be surprised if you hit 20 hp more on THAT dyno and that his car still traps well.
Op take it to the track. Reaction time means nothing. Mine is usually in the 7 second range. Just check your mph.
Melting Slicks
Joined: Apr 2007
Posts: 2,616
Likes: 111
Asking people what their car runs in a quarter mile and what mods were done is like asking how big their di-- is.....all are basically stock of course....
take it to the track & see what mph it posts...very telling of hp levels in real terms
take it to the track & see what mph it posts...very telling of hp levels in real terms
Last edited by 856SPEED; Mar 7, 2013 at 10:20 PM.
Race Director
Joined: Dec 2002
Posts: 13,348
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From: SCMR Rat Pack'r Charter Member..Great Bend KS
Mine, stock, dyno'd at 311hp at 80K miles. The next car on the rollers that morning was a buddy's 2004 LS1 C5 with about 12K miles on it; it dyno'd at 315hp.
I'd say if there was not noticeable misfiring during your run, then you have a compression issue or someone really did replace the LT4 with an LT1 at some point. Have you looked at the rockers?
I'd say if there was not noticeable misfiring during your run, then you have a compression issue or someone really did replace the LT4 with an LT1 at some point. Have you looked at the rockers?
Safety Car
Joined: Sep 2010
Posts: 3,752
Likes: 190
From: Indiana PA
Do some runs to get your MPH.
I disagree with whomever said trap speed should be 103-107. My stock LT1 with ONLY muffler eliminators and x pipe traps at 105 pretty consistently. Go ahead call BS on this, you call all you want. Doesn't change the fact it is the truth.
LT4 should be a few MPH quicker depending on car/track conditions. List your DA at the track you go to.
The local track to me at best is around 1400 or so in the spring or fall. At least when I have been there.
Thread Starter
Safety Car
Joined: Sep 2006
Posts: 4,129
Likes: 1
From: Pasadena CA
And no, guys it's not a bloody LT1
- I'm not that daft