Post your 10 second combo's

[bobtile]

Hey tex, very cool car, man. How'd ya get her so light? I'm working on a 69 belvedere that I'm slowly trying to get on a diet and honestly, I never thought 3660 with driver was a possibility without cutting it up.

Hey Ht, Have you weighed your car? You'll be surprised. You saw what I,ve done with my car and I'm at 3690 with me in it. i was shocked too.

 

[Tex013]

HT413/bobtile
I can only call that weight after using the dragstrip weighbridge - hey I am skinny (maybe 150lbs)
Car as weighed , fibreglass bolt on hood,fibreglass front bumper , aluminium heads/waterpump and housing , aluminium radiator , manual steering and brakes , front SSBC discs aluminium caliper , 10" drums out back , Strange S60 diff , Centreline Competition Qualifier rims , 1/3 tank of fuel (stock tank with sump). Stock full interior including heater/demister .
Splicer I hear that re fuel filter - just swapped out to a different pre filter picked up near as 1/10 and 1mph in the 1/8th

Tex

 

[bobtile]

I plan on posting here shortly!

 

[Budnicks]

I plan on posting here shortly!

I'm looking forward to it... :headbang:

 

[bobtile]

Can someone point me to the 17 second combo thread?

 

[HT413]

Can someone point me to the 17 second combo thread?

Looks to me like you're headed in the right direction. :walk:

I keed, i keed.

 

[bobtile]

Thanks 413. Nothing like spending money on performance goodies and going slower.

 

[Budnicks]

it's all in the tuning

 

[Gpuller]

Can someone point me to the 17 second combo thread?

I can start one...

 

[bobtile]

Leave the 10 second door open. Looks like I won't be here till next year.

 

[Mike Gaines]

Love your Coronet. I have one very, very similiar that I am going to start on "freshing up" my motor soon. Mine is a 66 Coronet 440 2 dr hardtop. Specs are 440" stock bore, 10-1, Custom ground cam with .570 intake lift and .569 Lift with Crane Gold 1.5 rockers, 264 intake and exhaust duration. Iron heads with 2.19 intake and 1.88 exhaust that flow (@600lift) 267CFM Intake and 216CFM exhaust. M-1 single plane with 4150 Holley 950 race carb with 50cc primary accelerator pump conversion. MSD Pro Billet Dist with 6AL box. 19 advance in distributor plus 18 degrees intial. Hooker Super Competition Headers, 727 w/Griner reverse valve body and Coan Super Sprag, Hurst Quarter Stick (Foot Brake, not trans brake) 4200 Converter by Ultimate Converter. 4.10 8 3/4 with Detroit Locker, Strange Axles, Super Stock Springs and snubber. 12 gal fuel cell in trunk and the big Mallory Pump and big Fram filter. 30x13.50x11.25 (wide) MT DOT slicks.
The car only runs 11.90 right now. I bought it pretty much like it sits. I know it is tuned right, except carb jetting may be off....(it has 78 primary and 79 secondary). 35 accel. pump squirters.
I know I need more compression on the rebuild and I have to think the current motor is tired, maybe rings, valves, and valve springs are limiting it to the 11.90's. I know the tire are too tall also and too wide. I am going to install 28" Hossier x 10" wide slicks.
Give me your opinion on what you would do..1) Compression ratio 2) Rods 3) Heads 4) Cam and springs 5) Converter Stall and trans-brake ? 6) rear axle ratio ???
I like your 10.58 @ 125 and that is about what I want. Let me know if you get some time. Thanks.

- - - Updated - - -

To "The Man 440"...please take a look at my posting asking your help. It is on page 9 of this "post your 10 second combos"

 

[383man]

Love your Coronet. I have one very, very similiar that I am going to start on "freshing up" my motor soon. Mine is a 66 Coronet 440 2 dr hardtop. Specs are 440" stock bore, 10-1, Custom ground cam with .570 intake lift and .569 Lift with Crane Gold 1.5 rockers, 264 intake and exhaust duration. Iron heads with 2.19 intake and 1.88 exhaust that flow (@600lift) 267CFM Intake and 216CFM exhaust. M-1 single plane with 4150 Holley 950 race carb with 50cc primary accelerator pump conversion. MSD Pro Billet Dist with 6AL box. 19 advance in distributor plus 18 degrees intial. Hooker Super Competition Headers, 727 w/Griner reverse valve body and Coan Super Sprag, Hurst Quarter Stick (Foot Brake, not trans brake) 4200 Converter by Ultimate Converter. 4.10 8 3/4 with Detroit Locker, Strange Axles, Super Stock Springs and snubber. 12 gal fuel cell in trunk and the big Mallory Pump and big Fram filter. 30x13.50x11.25 (wide) MT DOT slicks.
The car only runs 11.90 right now. I bought it pretty much like it sits. I know it is tuned right, except carb jetting may be off....(it has 78 primary and 79 secondary). 35 accel. pump squirters.
I know I need more compression on the rebuild and I have to think the current motor is tired, maybe rings, valves, and valve springs are limiting it to the 11.90's. I know the tire are too tall also and too wide. I am going to install 28" Hossier x 10" wide slicks.
Give me your opinion on what you would do..1) Compression ratio 2) Rods 3) Heads 4) Cam and springs 5) Converter Stall and trans-brake ? 6) rear axle ratio ???
I like your 10.58 @ 125 and that is about what I want. Let me know if you get some time. Thanks.

- - - Updated - - -

To "The Man 440"...please take a look at my posting asking your help. It is on page 9 of this "post your 10 second combos"

Do you mind me asking what you are shifting your car at right now ? It sounds like that combo should be alot faster then 11.90's. I can tell you I run a 30" tall 9" Hoosier radial slick with 4.30's and it works nice for my street/strip setup. With your 4.10's a 28" tall tire should work fine on your setup. Ron

 

[Mike Gaines]

Ron.. for best et's I shift 1-2 at 6100 and 2-3 at 6300 and go thru traps at 6000. I have 30" tall tires now. I know I have to go to 28"....too much tire.

 

[383man]

I did not mean to sound smart Mike as I just think with what that combo has it will go faster then 11.90's. Shorter tire may help some. I did not notice what the mph is as that will give us an idea of how much power its making ? Ron

 

[Mike Gaines]

I did not mean to sound smart Mike as I just think with what that combo has it will go faster then 11.90's. Shorter tire may help some. I did not notice what the mph is as that will give us an idea of how much power its making ? Ron

MPH is 112.5 and goes thru the traps at 6000 with the 4.10 gear and 30" tall tires.
I think 2 things are wrong with my motor...#1 probably valve springs, valve job and piston rings are tired. #2 I have a M1SINGLE PLANE INTAKE and everything I have been reading with a motor with less than 625 to 650 HP should be using a DUAL PLANE INTAKE...your thoughts ?????

 

[minnesota guy]

I wouldn't go to smaller tire. Rule of thumb I was always taught is to get the biggest tires you can under your car for traction. Adjust elsewhere. Chuck Lofgren told me that. Plus going from 30 to 28 tire it won't be noticed too much. My combo is similar to yours in my 71 Cuda. Playing with 3.91, 4.30 and 4.56 my times were all pretty close....4.30 I could get an 11.68....With 3.91 I ran 11.72... With a 10: 1 motor and iron heads that flowed like yours--I was slowing down with mechanical cams in your lift range. It went from 11.68 with .520 lift racer Brown cam to 11.90's with 2 bigger mech cams...(one was the .590 Purple with 4.56--slowed down to 11.9)

Frustrating....My combo similar to yours--with Street Dominator intake, 6 pack pistons, Holley 850 or 750--(ran the same) full dual 3 inch exhaust....3800 stall..3600 lbs with me...10.5 approx.........My best times were with a stinking 520 lift hyd racer Brown cam 254@ 050.......STH-42.....I went one step up in Racer Browns mech cam--and it again slowed my car --this fall--back down to 11.9.........................I Now installed a Mopar .533 Hyd cam this fall--and will run that to see if that does any different this spring..

-If you have an old 509 laying around......try that with your combo now. For giggles
Jeff

I share your pain.

 

[Mike Gaines]

Thanks for the input, i will keep you posted

 

[383man]

MPH is 112.5 and goes thru the traps at 6000 with the 4.10 gear and 30" tall tires.
I think 2 things are wrong with my motor...#1 probably valve springs, valve job and piston rings are tired. #2 I have a M1SINGLE PLANE INTAKE and everything I have been reading with a motor with less than 625 to 650 HP should be using a DUAL PLANE INTAKE...your thoughts ?????

No you dont have to run a dual plane with less then 625 hp. Heck no it all has to do with the combo. Basically the single plane is geared more for a race car with alot of gear and converter as generally single planes like rpm and make more power up top then the dual plane but on a basic combo the dual plane usually has better low end but not as much up top. But thats just how they can act in general as none of it is set in stone. Some 450 hp cars with the right gear and converter may run best with a single plane as their is alot to do with it like tire height , valve springs , cyl head flow and many other things such as car weight as that can have alot to do with it. Usually a heavy street car with not much gear will like a dual plane much better then a single plane. Now my 63 makes about 600 flywheel hp and right now I run the Indy dual plane but I plan to try a single plane one day. Some cars like mine are kinda on the line where you may not no which intake will work the best until I try both. So yes nothing is written in stone about when to use a single or dual plane intake.
If your car is a street car then it cant hurt at all to try a nice dual plane like the EDDY RPM intake. I also think your combo should make more then 112 mph as you should make more power. Do you have the 02 sensor setup to see what your fuel mixture is ? You might try some jet changes to see how your mph does but with the 02 setup you can moniter your fuel mixture at wide open throttle. But I would check or test your valve springs first to make sure they are up to snuff. Ron

 

[Mike Gaines]

Thanks for your input. My 4150 Holley 950CFM Ultra Race Carb has 78 primary and 79 secondary. I am going to try going up about 5 sizes on my first test and tune day at Famoso on Feb 22. Anyway, I need to buy new slicks so I am getting the Hoosier 28"tallx10" wide. I am also ordering a 4.56 third Member from Mancini and a set of Cal Tracs to replace my Super Stock Springs and Pinion Snubber. I will need the 4.56's and the Cal Tracs when I rebuild my motor anyway. My combo with be: Stock Stroke 440, .030 over 13.5-1, .660" Comp Flat Tappet Solid Lifter Cam, Indy E-Z heads with Max Wedge Ports, Indy Dual Plane with Max Wedge Ports CNC's into this Manifold. I will be using my current 4150 Holley 950 carb, my Hooker Super Competition Headers, my MSD Billet Dist with 6AL box, my 4200 Ultimate Converter...all hooked up to the 4.56's and Cal Tracs. I already have mini-tubbed rear end. 12 gal Fuel Cell with big Mallory Pump. I think thid combo should produced around 650HP with shift points at around 6500. I would hope my new setup would run 10.60's or so. What do you think ????

 

[minnesota guy]

I would get the biggest set of slicks you can fit under the car. You will need all the 60 ft you can get, as long as there are not rule limitations.