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gnicholson
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 Posted: Sat Jul 17, 2010 9:11 pm |
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Joined: Mon Jan 05, 2009 8:09 pm
Posts: 85
Location: k.c., mo.
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i started the 498 today for the 1st time. its a 13.5 motor with320 cc heads, 279 286 748cam on 110, drj ported edelbrock intake with a 1050 4500. sounds good. has 45 lbs hot at idle in gear with std ls6 pump. no leaks. i had to add a little idle speed and a bit more idle mixture than the 12 to 1 468 but its new. good so far . the old 468 ran a best of 9.69 , hopefully this is 3 or 4 tenths faster
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Slowpoke
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Posted: Sat Jul 17, 2010 10:22 pm |
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Joined: Wed Oct 24, 2007 6:36 pm
Posts: 718
Location: Blanco, Texas
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Good Deal!!! Keep us posted.
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Donee
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traysvega
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Posted: Sun Jul 18, 2010 10:37 am |
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Joined: Thu Apr 20, 2006 8:57 pm
Posts: 708
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gnicholson
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Posted: Mon Jul 19, 2010 11:00 pm |
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Joined: Mon Jan 05, 2009 8:09 pm
Posts: 85
Location: k.c., mo.
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thanks guys. im kind of interested to get it out and see what happens. i need to get the throotle stop ratio figured out before the next nhra race
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BarryW
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Posted: Tue Jul 20, 2010 1:41 pm |
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Joined: Mon May 17, 2010 9:34 pm
Posts: 115
Location: Georgia
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It oughta be a hoss! Let us know what she does!
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gnicholson
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Posted: Tue Jul 20, 2010 2:20 pm |
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Joined: Mon Jan 05, 2009 8:09 pm
Posts: 85
Location: k.c., mo.
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its going in a 70 chevelle. a very nice car but back halved with stock front suspension. the front pushes a lot of air. it will have about 100 more hp than the 468 or 800 but im guessing 3 tenths faster max and 140 mph over the previous 468 that typically ran 133.what do you guys think?
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rick360
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Posted: Tue Jul 20, 2010 5:18 pm |
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Joined: Tue Apr 18, 2006 3:20 pm
Posts: 1457
Location: Missouri
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.3 et and +7 mph sounds about right if it gains 100hp over the 468. Keep us posted on the results.
Are the 320 heads ported? Flow #'s? Valve sizes?
Rick
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gnicholson
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Posted: Wed Jul 21, 2010 9:52 pm |
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Joined: Mon Jan 05, 2009 8:09 pm
Posts: 85
Location: k.c., mo.
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the heads are 1990 vintage brodix castings originally ported by afr in the same year. we redid the valve job and used angles recommended by mondellos porting supply and a radius cutter for the exhaust. the heads flowed a little over 370 and 300 @700. the port work and valve job picked up about 30 cfm on the intake and somewhat less onthe exhaust at mid lift. i need to get the figures out.the intake was ported by dr j. 279 286 on 110 with 749 lift. a little over 13 to 1. comp belt drive,je pistons, callies crank and rods, 1050, 2 i/8 headers with a merge collector going from 3 1/4 to 4 inches
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gnicholson
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Posted: Sat Jul 31, 2010 9:28 pm |
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Joined: Mon Jan 05, 2009 8:09 pm
Posts: 85
Location: k.c., mo.
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i finally ran at the track today. unfortunately it was all 1/8 mile. i wanted to run the 1/4 to get some tuning done and get the throttle stop figured out for the next divisional race. i left the stop on. it ran 2-3 hundreths quicker every pass. the lat was a 7.098 with 2 seconds of timer. should run 6 0's wot in the same conditions which were low 90's 29.95 and 75% humidity. the data logging quit on my fast meter so i need to get that fixed. should be ready to tune next time
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