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02-06-2009, 10:00 AM
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#1 |
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Registered User
Join Date: Dec 2008
Location: Golden Valley MN
Posts: 18
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to dyno or not to dyno
I recently acquried a 406 sbc that runs on e85 and just had a cabr built for it, instead of paying 300+ dollars to throw it on the dyno, do you guys think I should try and tune it myself or pay the guy that built the carb do it?! Does 80 an hour sound reasonable on the dyno with tuning?
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1986 Chevy C-10 2WD Long Box 406 SBC 12.5/1 compression E-85 monster! |
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02-06-2009, 10:34 AM
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#2 |
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The Engine Whisperer
Join Date: Sep 2006
Location: Ohio
Posts: 770
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Re: to dyno or not to dyno
IMO you can never go wrong with having a motor dynoed, there a just so many more aspects that you can see (like how much fuel is being used, the A/F of each cylinder). Plus you can actually know how much horsepower you have which is always a plus in my book.
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02-06-2009, 03:09 PM
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#3 |
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Registered User
 
Join Date: Jul 2007
Location: Ottawa Ontario Canada
Posts: 1,156
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Re: to dyno or not to dyno
PLUS the cam (if not roller) will be properlly broken in.
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02-07-2009, 10:12 AM
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#4 | |
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Junior Member
Join Date: Sep 2005
Location: Minnesota
Posts: 159
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Re: to dyno or not to dyno
Quote:
I would have it dynoed then it will be tuned and if there are any problems you can fix them before you install it. Where are you looking at dyno for $80/hr? I had mine done here http://randrperformance.com/ and I thought it was about $250 for a 4 hour session.
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1970 blazer, street/strip project 1963 ford fairlane sports coupe 50,000 original miles |
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02-07-2009, 12:39 PM
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#5 |
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Registered User
Join Date: Feb 2001
Location: Wetumpka, Al, U.S.
Posts: 8,892
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Re: to dyno or not to dyno
I've never had one done but it would be cool. I dyno mine on the quarter mile.
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Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole! |
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02-07-2009, 01:46 PM
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#6 |
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mini truck racer
Join Date: Aug 2006
Location: Baytown , texas
Posts: 3,010
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Re: to dyno or not to dyno
I am a believer in the chassis dyno . I found around 40 HP in carb tuning . I also drag strip dyno .
__________________
1949 5-window 1969 Camaro 1976 Chevy Luv yellow 1978 Chevy Luv Blue 1976 Chevy Luv Black 1979 Firebird Flooded in Harvey 1999 F350 Dually 2005 GMC Sierra 4.8 RCSB 2014 Explorer (wifes) My build :http://67-72chevytrucks.com/vboard/s...d.php?t=399148 Build #2: http://67-72chevytrucks.com/vboard/s...d.php?t=653583 |
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02-07-2009, 03:19 PM
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#7 | |
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Registered User
Join Date: Feb 2001
Location: Wetumpka, Al, U.S.
Posts: 8,892
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Re: to dyno or not to dyno
Quote:
I like a chassis dyno too. Be for warned they will hurt your feelings!
__________________
Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole! |
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02-08-2009, 07:42 PM
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#8 | |
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mini truck racer
Join Date: Aug 2006
Location: Baytown , texas
Posts: 3,010
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Re: to dyno or not to dyno
Quote:
 But just get a baseline and work from there . I had alot of little things to fix and then went to carb and timing .
__________________
1949 5-window 1969 Camaro 1976 Chevy Luv yellow 1978 Chevy Luv Blue 1976 Chevy Luv Black 1979 Firebird Flooded in Harvey 1999 F350 Dually 2005 GMC Sierra 4.8 RCSB 2014 Explorer (wifes) My build :http://67-72chevytrucks.com/vboard/s...d.php?t=399148 Build #2: http://67-72chevytrucks.com/vboard/s...d.php?t=653583 |
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02-07-2009, 02:34 PM
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#9 | |
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Registered User
Join Date: Oct 2006
Location: Arizona
Posts: 835
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Re: to dyno or not to dyno
Quote:
__________________
67 Short Step, 355, 700R 4.11 posi rear, 4/6 drop Discs on all 4 corners. Build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=219094 |
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02-09-2009, 12:34 AM
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#10 |
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Registered User
Join Date: Nov 2007
Location: Bay Area, Ca
Posts: 2,841
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Re: to dyno or not to dyno
I'm a dyno whore. I could spend all day perfecting a tune. I think I have made over 75 pulls with my truck..
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------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49 |
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02-09-2009, 08:38 AM
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#11 | |
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Registered User
Join Date: Feb 2001
Location: Wetumpka, Al, U.S.
Posts: 8,892
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Re: to dyno or not to dyno
Quote:
__________________
Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole! |
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02-09-2009, 01:54 PM
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#12 |
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Registered User
Join Date: Nov 2007
Location: Bay Area, Ca
Posts: 2,841
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Re: to dyno or not to dyno
Yes.. Probably 3-4 different combo's.. What is interesting though, with no changes to the combo, the tune can definately change from day to day with different density altitude..
__________________
------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49 |
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