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#1
06-06-2008, 05:11 PM
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Re: Black RS/Z & the 1/8 mile... any suggestions?
It may ET better at 6500-6700 rpm's. Are you running at least a 4:56? I am running 72's and 78's in the 780. Mine feels the strongest at about 6700 with a 4:10 rear and an M21. Mine needs at least a 4:56 to feel like anything. Its a dog!!
 
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#2
06-06-2008, 05:22 PM
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Re: Black RS/Z & the 1/8 mile... any suggestions?
I like blocking the rear PV on our 780s...it seems a lot more consistent. You sure that thing is running out of fuel?
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#3
06-06-2008, 05:34 PM
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Re: Black RS/Z & the 1/8 mile... any suggestions?
The plugs are awfully white... Didn't have any larger jets with us last night...
Only have a 4:10... How much worse would 4:56's be driving on the street? 4:88-5:13's would really pick it up. OBTW- 2.00 60 foot times...
__________________
~JAG~ NCRS#65120 68 GTO HO 4 spd Alpine Blue /Parchment 2 owner car #21783 71 Corvette LT1 45k miles Orig paint - Brandshatch Green - National Top Flight - last known 71 LT1 built. 71 Corvette LT1 42k miles Original paint - Black - black leather - only black LT1 known to exist. NUMEROUS Lemans blue Camaros, Monza Red and Daytona Yellow Corvettes & a Chevelle or two... Survivors, restored cars, & other photos https://picasaweb.google.com/lh/myphotos
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#4
06-06-2008, 05:37 PM
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Re: Black RS/Z & the 1/8 mile... any suggestions?
Hey Rob when you block the PV how many jet sizes do you need to go up?
__________________
~JAG~ NCRS#65120 68 GTO HO 4 spd Alpine Blue /Parchment 2 owner car #21783 71 Corvette LT1 45k miles Orig paint - Brandshatch Green - National Top Flight - last known 71 LT1 built. 71 Corvette LT1 42k miles Original paint - Black - black leather - only black LT1 known to exist. NUMEROUS Lemans blue Camaros, Monza Red and Daytona Yellow Corvettes & a Chevelle or two... Survivors, restored cars, & other photos https://picasaweb.google.com/lh/myphotos
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#5
06-06-2008, 05:47 PM
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Re: Black RS/Z & the 1/8 mile... any suggestions?
We have 4.56s in the Sub, and they ain't a whole lot worse...unless you're gonna be doing extended freeway duty? I think a jump of 6-8 is the rule of thumb, but I'd have to check my notebook to see where ours fell...our L72 is probably jetted a *lot* smaller than most of you guys would guess...
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#6
06-06-2008, 08:41 PM
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Re: Black RS/Z & the 1/8 mile... any suggestions?
4.88 or 5.13s are believable gears for an 1/8 mile with a Z. We had a couple of guys running 5.38s in SBCs at our old track.
There was one guy who ran a 5.13 in his SBC '61 Impala, and ran 1/4 mile. The car was named "The Twister", for obvious reasons. If I recall correctly, he hit the traps at around 8200.  
__________________
Don't mistake education for intelligence. I worked with educated people. I socialize with intelligent people.
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#7
06-06-2008, 08:45 PM
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Re: Black RS/Z & the 1/8 mile... any suggestions?
And the thing ya gotta remember, when going to stickies most guys jump up to like a 29" or 30" tall tire, which has at least a couple inches in height over the stock tire, which *really* compounds a gearing problem on a small block...
Would be hard to justify gearing it for the tall tires & the 1/8 mile if you mainly drive the car and only hit the track once or twice a year...but steep gears are FUN!
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