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power output after mods with dragstrip time

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Old Apr 30, 2001 | 11:39 AM
  #1  
Todds1987iroc's Avatar
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From: ohio
power output after mods with dragstrip time

I was at that dragstrip this weekend to run my car and the best time I had was 14.89 at 92.7 MPH. The temp was cool, only 55 deg. At first I had a problem with traction, but each run it got better. After all of the mods I have done I thought this motor should now run at least 14.5's. Look at the mods in my signature and tell me if you think this is all my motor is capable of.

Thanks, Todd

I also have a hypertech thermomaster chip. (not in signature)

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1987 Camaro IROC-Z w/ 305 tpi/5-speed/9 bolt 3.45 gear/L98 Corvette heads/ T.E.S. headers/ LT4 production cam/ 1.6 rockers/ Flowmaster exhaust/ K&N filters/ MSD coil/ & other free mods.
1969 Camaro with '96 350 vortec truck engine with many mods.
2000 Chevy Silverado 4X4
Dale Earnhardt... NASCAR's greatest Champion
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Old Apr 30, 2001 | 05:16 PM
  #2  
Cosmik Debris's Avatar
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From: Christchurch, New Zealand
What was your 60' time? That ET seems about right for your MPH. Have you done anything to help the induction system? You have a cam and heads but have you upped the fuel pressure or ported the runners? Seems like your engine isn't breating as well as it could.

For comparison my L69 with stock heads and cam but with RPM intake, 600 Holley and headers runs 14.7@93.5.

------------------
Cosmik Debris
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Old Apr 30, 2001 | 09:31 PM
  #3  
Petes 84Z28's Avatar
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From: out of my mind; be back in 5 minutes....
Car: 1989 Firebird Formula
Engine: Internal Combustion
Transmission: Completed
Axle/Gears: ones that turn.
Hmmm....just a tad bit quicker than my worn-out LG4....

Pete

------------------------------

Pete's Place
HiOutput Tech Page

<a href="http://www.hioutput.com/pete/garage/83SC/83sc.html" TARGET=_blank><IMG SRC="http://www.hioutput.com/pics/SC.gif" TITLE="Pete's 83 SC" border="1"></a>
My 83 SC...(originally V6) 206,800 mile LG4/5-speed from an 84 Z28, 3.42 one-tire-fryer, T-tops, PW, PH, boxed LCA's, Hedman Hedders and y-pipe, Dynomax cat-back, .420" lift cam, custom air induction .....best ET is 14.935@94.14</P>

</P>Success means you got up one more time than you fell....
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Old Apr 30, 2001 | 09:37 PM
  #4  
zippy's Avatar
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Joined: Apr 2000
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From: Chander, Arizona USA
Car: 2006 Silverado 1500
Engine: 5.3L
Transmission: 4L60E
i would guess it's capable of more. man, i'd be guessing 14.2 to 14.4, but i'm not sure of your altitude at your track. sure isn't making the hp it should with that trap speed. and i see it's a stick. powershifting it??? launch rpm???
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Old Apr 30, 2001 | 10:11 PM
  #5  
Todds1987iroc's Avatar
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From: ohio
On the 14.89 run my 60 ft time was 2.13 seconds. I did a small burnout on dry pavement then pulled right to the line. I launched at about 2500 rpm with the tires spinning some. I shifted at 5500 rpm's except my last shift from third to forth was at 5000 rpm's. As for shifting I used the clutch and only slighty took my foot off the gas. My tires are dunlop p5000 245-ZR16's and were at 32 psi each. With all of the mods I did I really was hoping for more. What do you think?

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1987 Camaro IROC-Z w/ 305 tpi/5-speed/9 bolt 3.45 gear/L98 Corvette heads/ T.E.S. headers/ LT4 production cam/ 1.6 rockers/ Flowmaster exhaust/ K&N filters/ MSD coil/ & other free mods.
1969 Camaro with '96 350 vortec truck engine with many mods.
2000 Chevy Silverado 4X4
Dale Earnhardt... NASCAR's greatest Champion
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Old Apr 30, 2001 | 10:31 PM
  #6  
D_Amlee's Avatar
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From: Oklahoma City, USA
Car: 89 IROC
Engine: Yes
Transmission: That, too.
Fuel pressure settings? Spark curve? Need more info.
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Old May 1, 2001 | 10:58 AM
  #7  
Todds1987iroc's Avatar
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From: ohio
fuel pressure is at 46 PSI. The base timing is set at 8 deg. adv. I cut out the air boxes under the filters and removed the screens from the MAF sensor. hope this info helps.

Todd

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1987 Camaro IROC-Z w/ 305 tpi/5-speed/9 bolt 3.45 gear/L98 Corvette heads/ T.E.S. headers/ LT4 production cam/ 1.6 rockers/ Flowmaster exhaust/ K&N filters/ MSD coil/ & other free mods.
1969 Camaro with '96 350 vortec truck engine with many mods.
2000 Chevy Silverado 4X4
Dale Earnhardt... NASCAR's greatest Champion
Reply
Old May 1, 2001 | 02:09 PM
  #8  
Ray87Z's Avatar
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Joined: Jul 1999
Posts: 1,366
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From: Atlanta, GA, US of A
Car: 94 Z28
Engine: LT1 w/ headers, catback, CAI, tune
Transmission: 4L60E
Axle/Gears: 3.23s
I would have expected a time closer to low 14s, but track altitude and conditions may not allow it. What you need to do is find out what other average cars are running at your track in similar weather conditions to compare how you're really doing...

------------------
Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray
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