Joined: Mon Oct 10 2005, 01:49PM
Location: Grand Rapids, MI
Posts: 421
Any type of aftermarket converter? Cam straight up, advanced any?
My guess its still pretty soggy down low even with the 440 if the converters stock.
I ran near the same combo in a '67 Fury with a 413. Ran 15.80's with the stock converter and a 625 carter. Swapped on a 750 and a 2400 stall and it went 14.50's.
Joined: Sun Oct 09 2005, 05:02PM
Location: ALLEN PARK, MI.
Posts: 2007
HEY! Lookie who's back! SF440! Hurray! Dana is probably right. The 3.91 will help your launch, but no converter makes a big diff!
My 4,440 lbs 68' NewYorker had a stock compression 440 with 750 Holley 3310, M-1 dual plane intake, 284/484 Purple cam, Hi-PO log manifolds with 2.5" exhaust and Walker Super Turbo's and factory heads with 1.81 exhaust valves added. Stock trans with a 4.10 Aurburn rear 8 3/4. With "70 series" bias ply Mickey Thompson tires, I ran 15.1 @ 93 MPH in the 1/4 mile! A 2.34 60' launch also. Good stuff in my "early" days! Tony P.
Joined: Mon Feb 20 2006, 08:12PM
Location: Ontario,Canada
Posts: 950
High 14's if you can get it hooked to the track.. I hope you have a pinion snubber.. that's a lot of weight to get moving..
BTW.. I use a bone stock 1978 440 and tranny out of a new yorker in my aspen when I first got it.. with 3.91 gears it went 13.97 @ 96.. that was at 3800lbs... so there is tons of power in these old mopars..
!welcome ,lots of great info on this site for you,as these guys know their stuff...I would say,you are on you're way to 15-15 1/2 sec times,depending on elevation,track,etc.Being that you already have 3.91s,the next step would be a GOOD converter,Then you can start working on that engine combo.A Pinion snubber as suggested and remove the band clamps from springs behind the axle and add a few more in front to tie the springs together,and a set of LONG rear shocks and this will allow,the rear to rise and PLANT the tires,and best of all,it's cheap.It takes a lot of torque to get this much weight moving,so if you consentrate on the 0-60 ft times,that is the biggest factor. !thumb glen
A good converter is more important in a heavy car,than in a light car.This will be you're single, most important thing to change when you want to step up to the 14s.Hughes performance has a great converter,it is a Pro Street model and it should stall around 3-3,200 rpm,at about $350, you shouldn't have to step up again unless you really get serious with that motor.Between that converter and those gears,it will Launch as hard as Warren Johnson's PRO STOCK....We'll maybe not quite THAT HARD!..... Glen
Joined: Sun Oct 09 2005, 05:02PM
Location: ALLEN PARK, MI.
Posts: 2007
Well, like I said MANY times before......take what you THINK your car will run at the track and add a full second to that time. You'll become pretty honest with yourself 9 times out of 10! Seen it happen to many times! This fact becomes VERY true for first time racers when combined with a "first time out" car! Tony P.
Exactly,Tony. !thumb You can actually take two exact combinations and 1 will run like a scalled cat and the other will fall flat on their face.I have seen guys rip out their motor for the winter months,and throw $2-3,000 more at it,with bigger heads,roller cams,exotic full flow BG carbs,etc.,and come Spring,it falls over and they can't get it to run.WHY?,because they changed too many parts at once and they lost the BASELINE setup,and its gonna take forever to figure it out.It's amazing sometimes,just going from 1 compound of slicks to another!...Now it's hooking,but now i've got a BOG....AAAHHHH! !stars Glen