Re: Quarter Mile time for 1971 440+6 Roadrunner
[Re: markshemiworld]
#2484032
04/17/18 03:28 AM
04/17/18 03:28 AM
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Joined: Apr 2016
Posts: 184 Memphis,TN
J. Hammer
member
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member
Joined: Apr 2016
Posts: 184
Memphis,TN
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16.5 @ 75mph? Depends on who built and tuned it. Radial T/A s are spin city on a minivan. Post up some 12's and I will be impressed.
Last edited by J. Hammer; 04/17/18 03:30 AM.
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Re: Quarter Mile time for 1971 440+6 Roadrunner
[Re: markshemiworld]
#2484048
04/17/18 06:03 AM
04/17/18 06:03 AM
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Joined: Jan 2003
Posts: 20,179 Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
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Posts: 20,179
Park Forest, IL
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IIRC, Car Craft got one into the 12's with similarly equipped as yours. They were testing a 6 bbl RR against an LS-5 Chevelle. The RR was faster stock than tbe Chevelle was with headers and gears. They called the RR 'Superman's Supercar'.
"Everybody funny, now you funny too."
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Re: Quarter Mile time for 1971 440+6 Roadrunner
[Re: qwkmopardan]
#2484087
04/17/18 10:19 AM
04/17/18 10:19 AM
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Joined: Jan 2003
Posts: 13,365 Marion, South Carolina [><]
an8sec70cuda
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I Live Here
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Posts: 13,365
Marion, South Carolina [><]
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Low 13s or high 12s w/ different tires that will hook and considering it's tuned well.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Quarter Mile time for 1971 440+6 Roadrunner
[Re: markshemiworld]
#2484120
04/17/18 11:21 AM
04/17/18 11:21 AM
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Joined: Oct 2015
Posts: 570 UK
rb446
mopar
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mopar
Joined: Oct 2015
Posts: 570
UK
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My 440+6pk motor made 415 track hp with a single 850DP, stock 906's and a big solid cam, hdrs. If yours is on a par with that corked up and with a good tune, with a weight of 3800 at the line it should run 108>109mph which is normally a lowish 12. However with those tyres you'll prob lose over 1 sec off the hit, I would say mid>high 13's. Some 29" tall slicks would be the way to go for a 5500 trap rpm inc. slip and 12.2's@110.
1969 'Cuda 446ci, best 9.96@133.9 in 1990 1971 340 'Cuda, best 11.01@122.8 in 1987
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Re: Quarter Mile time for 1971 440+6 Roadrunner
[Re: markshemiworld]
#2484153
04/17/18 12:20 PM
04/17/18 12:20 PM
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Joined: Jan 2003
Posts: 14,499 So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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Ralph from Supercar has one he runs in Pure Stock with a 4 speed. Best so far is 13.6@101.
I'll be interested to hear your impressions of that cam in the upper rpm's.
Hopefully you used quench dome pistons to get to that 10.5cr........ Otherwise I predict ping city with that short duration cam.
My shoot from the hip guesstimate, based on the small fast rate cam, non-sticky tires, and potential Texas heat and humidity......... Mid/high 14's @92-95(first couple times out with it). With some tuning, practice, and better tires........... 13.7@99.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Quarter Mile time for 1971 440+6 Roadrunner
[Re: markshemiworld]
#2484178
04/17/18 12:54 PM
04/17/18 12:54 PM
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Joined: Feb 2005
Posts: 20,174 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,174
PA.
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Thanks for all the responses! What is a good tire that will hook better and still be ok for the street? Also, do you guys see anything lacking that would be an easy way to step up he performance? Better tires, higher stall converter, headers, ported heads or aluminum heads.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Quarter Mile time for 1971 440+6 Roadrunner
[Re: markshemiworld]
#2484179
04/17/18 12:55 PM
04/17/18 12:55 PM
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Joined: Jun 2014
Posts: 5,183
Porter67
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master
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Posts: 5,183
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Your in the mud now, you got to run with the BFG-s first Then switch to a decent 275/60 drag radial. Since you have a auto and BFG drag radial would probably work well and act like a street tire, yes there are better hooking drag radials but I dont think youd need one thats more slick like then street like, if that makes any sense. But yea, it would be nice to see ya try your current BFG tires just to see how well ya can do.
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Re: Quarter Mile time for 1971 440+6 Roadrunner
[Re: markshemiworld]
#2484187
04/17/18 01:02 PM
04/17/18 01:02 PM
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Joined: Jan 2003
Posts: 14,499 So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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You have to start somewhere.
Might as well just try it like it is to see where you're at. That will give you way more useful info that what any of us come up with before the car has been run.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Quarter Mile time for 1971 440+6 Roadrunner
[Re: markshemiworld]
#2484289
04/17/18 05:14 PM
04/17/18 05:14 PM
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Joined: Feb 2003
Posts: 18,582 Rust Belt, SW PA
Silver70
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I Live Here
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Rust Belt, SW PA
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As is, I'd guess mid 14s.
68 Road Runner, 69 Belvedere, 71 Challenger Vert 340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z 66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram
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Re: Quarter Mile time for 1971 440+6 Roadrunner
[Re: DaytonaTurbo]
#2484395
04/17/18 09:59 PM
04/17/18 09:59 PM
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Joined: Nov 2010
Posts: 3,696 jersey
Spaceman Spiff
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jersey
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I don't think you'll get out of the 14's as-is. Stock heads with stock valves with a valve job and a very small cam. Should make for a good street cruiser. With good tires and a well sorted suspension I would expect mid-low 13's. '58 savoy, 3900lbs '70 440 from a town and country wagon. ball honed, new rings, bearings, and rod bolts. stock pistons, rods, crank. ( crank need to be polished) Lunati bracket master cam, with springs to match, ductile iron rockers. stock heads, that were magnafluxed and just cleaned up, new seats, etc. no port work. sanderson block hugger headers, 3 inch exhaust with race magnums. torker 2 intake, 850 double pumper. 3,000 stall, 4.56 gears. 12.24@ 111 on a set of L-60 McCrearys.
526 cubes of angry wedge, pushbutton shifted, 9 passenger killer!
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