What do you think is about the best ET you could get from a fully streetable 440 B body (36-3800 lb) car? Let's say 10:1 compression, single 4bbl. Good idle and if possible double digit mpg. Is 11.50 feasable?
Best ET for a steetable 440 auto
- Thread starter 69 GTX
- Start date
MikeyT
Well-Known Member
Ok, possible, but define driveable...
Do you have power brakes? What kind of rear gear do you want ?
Engine isn't alone in this plenty of engine but are you willing to do suspension mods to get it there..
Ok here is my guess...
440 with good quench and true 10:1 comp
440source heads
.557 cam
Holley street dominator intake
1" spacer 850 Holley carb
2" headers open
Firecore distributor curved to engine
MSD ignition ( preferably digital 6 plus)
Auto with. 4200 stall converter.... 4.10 gears 29" drag radial
Front suspension sway bar unhooked
90/10 shocks
MP SS springs
2011 Dodge ram rear shocks
Mikey
Do you have power brakes? What kind of rear gear do you want ?
Engine isn't alone in this plenty of engine but are you willing to do suspension mods to get it there..
Ok here is my guess...
440 with good quench and true 10:1 comp
440source heads
.557 cam
Holley street dominator intake
1" spacer 850 Holley carb
2" headers open
Firecore distributor curved to engine
MSD ignition ( preferably digital 6 plus)
Auto with. 4200 stall converter.... 4.10 gears 29" drag radial
Front suspension sway bar unhooked
90/10 shocks
MP SS springs
2011 Dodge ram rear shocks
Mikey
mopar 3 B
Well-Known Member
What kind of speed limits do you have in Wisconsin that 4200 stall and 4:10 gears are street able?
MikeyT
Well-Known Member
I ran a 4200 stall ptc 9.5 converter and 4.10's in my 1970 Superbee for three summers and NEVER had a problem on a street with it. 295 65 15 tires, and hummed around 60 miles per hour at 3000 rpms. Drove the crap out of that car! Don't let the stall speed scare you, that thing shifted as nice as any converter I ever had in a 727. That is why to this day I will only run PTC converters
Mikey
Mikey
GrabberOrange69
Well-Known Member
Sure, it's easy. Milder build but tough shortblock and spray your way (Nitrous) into the 10s if you want to.
Longroof
Well-Known Member
Very close to my combo... I have not had a chance to run the car yet....
64 Savoy Wagon
440 stealth heads with a little work Hughes solid lifter cam don't remember the exact specs but .540 ish intake and .560 ish exhaust... 10.6:1 compression. 3000 converter and Dana 4.10. I plan to run a 28x11.5 hoosier quick time pro. I want to keep my car in the low low 12's so I can run Sportsman class in summit series brackets which has a 12.0 cut off. I will be getting this thing ready to run over the winter... it is very streetable... cam is a little lopey but that is half of the fun... on the street I am running a 285/70/15 tire... 30.7 inches tall. 65 mph and about 3000 rpm works great on the street so far.
Herr_Poopschitz
Well-Known Member
I'm confident I could put together something much milder than anything mentioned above that could hit 11.50s easy assuming you were a good driver. Pump gas, noticable idle but nothing crazy, and upper teens mpg at 55 mph. The real question is if you're willing to spend enough to do it...most aren't.
Of course if you want to go cheaper and have a rough/choppy idle to only hit 11.50s, any old cookie cutter combo should get close.
67 B-body
Well-Known Member
I'm doubtful my car gets very good double digit fuel mileage numbers,,,, but it is certainly a sub 11 second car... I have only one timed pass @ 10.42 "I believe". I'm at the campgrounds so no way to walk out and read the ticket for EXACT numbers.... but it is a mid 10 second car with plenty of traction issues on that pass.... I have since added my own (CalTrac) "rip off" system, and it feels better on the street, but haven't been to the race track to try it out..... I still have to add a cage to be allowed down the strip.... A stern warning about speed and safety isn't something I want to hear again!!!
Longroof
Well-Known Member
I bet it involves a boost or nitrous? ??
68 HEMI GTS
Well-Known Member
this is my street 440, drive it everywhere on pump gas. i think it has 50's or maybe even 40's in it once i work on the suspension. bet my car is tipping the 4000LB mark for sure with me in it.
http://www.forbbodiesonly.com/moparforum/showthread.php?77716-took-my-RR-to-the-track
http://www.forbbodiesonly.com/moparforum/showthread.php?77716-took-my-RR-to-the-track
dvw
Well-Known Member
We do it with .557 Mopar cam, 2 Eddy 600's, Old 2x4 Wiend intake, ported 906, 4.30, S/S springs, good converter in a 65 Belvedere. Can't vouch for the mileage though. 11.50s@115
Doug
Doug
Herr_Poopschitz
Well-Known Member
No. Those are reserved for cars that want to go fast.
Longroof
Well-Known Member
Then let's hear about this 440 combination that is mild mannered and runs 11.50s in street trim in a 3800 lb b body
Herr_Poopschitz
Well-Known Member
It should only require approx 500 hp give or take. So build for 550ish for extra margin.
Personally, I would ditch the 727. Since mpg was mentioned, 4L80E or better yet make a move to a TKO.
Not sure why one would want to limit themselves to 10:1 when more can be had on pump w/ the correct chambers and cam timing...
11:1 - maybe 11.5 depending on a few factors, 350 cfm, 235ish +/- at .050" should do it w/ 112-114 LSA. 550-575 hp.
Ok so let me clarify. I have a short block with the forged speed pro 6 pak pistons. I believe they are 10.7 to1 with closed chamber heads. I was toying with the idea of E85 even. But anyway I'm going to start with 3.73 gears and a gearvendors OD. I will change rear gears if necessary. But I want to be able to cruise 70 @ 2500 in od. I want a just barely noticable rumble in the cam. I'm willing to run alum heads and a hyd roller cam. I would like to not use NOS. I'm a diehard, no GM parts in my car. But I'm all ears Herr......
- - - Updated - - -
Also I have Cal tracks, and have frame connectors, torque boxes, front lower shroud and firewall braces too. So I believe I have the chassis to do it. Dana 60 with 325 50 15 MT drag radials
- - - Updated - - -
Also I have Cal tracks, and have frame connectors, torque boxes, front lower shroud and firewall braces too. So I believe I have the chassis to do it. Dana 60 with 325 50 15 MT drag radials
67 B-body
Well-Known Member
3.73's AND an OD unit????!!!!!
You might want to build a low RPM stroker for that combo......
You might want to build a low RPM stroker for that combo......
womanator
Well-Known Member
This use to be are trainer car.
Stock 1978 440 bottom end.
Ported 906 heads.
Eldelbrock Perm RPM intake.
780 Holley carb
Schumacher headers
Mopar solid 557 cam
727 trans-brake trans.Not using the brake for traing.
4.10 gears
Car ran 11.59 with this combo.
Nitrios on but not used for 11.50 pass.
Very mild on the street.
Runs on 91 octane.
Stock 1978 440 bottom end.
Ported 906 heads.
Eldelbrock Perm RPM intake.
780 Holley carb
Schumacher headers
Mopar solid 557 cam
727 trans-brake trans.Not using the brake for traing.
4.10 gears
Car ran 11.59 with this combo.
Nitrios on but not used for 11.50 pass.
Very mild on the street.
Runs on 91 octane.
68 HEMI GTS
Well-Known Member
i think your already off to the wrong start on your combo. 3:73 gear and a hyd roller are not going to cut it for a 440 in a heavy B body. your going to have to spin it harder than 6,000 and that where hyd roller's in a RB Chrysler are done. i know, i had one in this exact motor. mine has a healthy head on it, seems to like 6800 real well with the 40 year old out dated solid. i also run a 325-50 on my roadrunner, needed a 4.10 gear to really work. even with the 5 speed when i went to the 4.10 from a 3.91 it was a noticeable difference. if you want to run the above (73 gear & hyd roller)and achieve your ET goals your going to need 500 CI. back on the 440, when i had the 5 speed i was getting mid to high teens. the 727 and a loose stall have cut into that. i can't say for certain because i haven't bought a speedo cable but im guessing maybe low teens optimistically. i can also say from experience that a 850 will not get the mileage of a six pack. 850's are gas hogs. i have a nice one i may play with on mine, i already know the mileage will go to ****. tried swapping form a six pack to a 850 about 15 years ago on a 440 i had. gas mileage wasn't even in the same ball park.
i do see some people post stupid fast combo's once in a while that don't really make sense. But if you look at their track elevations there usually at or below see level.
i do see some people post stupid fast combo's once in a while that don't really make sense. But if you look at their track elevations there usually at or below see level.
383man
Well-Known Member
Wow that is so close to my old 440 combo that used to be in my 63:
stock 440 shortblock with KB pistons that gives 10.0 comp with the 906 heads I ported and had cut.
MP .557 cam and Isky ductile rockers
Holley Street Dominator intake and 850 DP
Mallory dist and MP orange ECU
1-3/4 Hedman headers and 3" exhaust
727 with Turbo action manual valve body and Dynamic 9.5 converter
4.30's with 30 x 9 tires
Stock suspension with just SS springs and 90/10 shocks up front
Car weighs 3700 with me and I drove it everywhere even on the highway as it turned about 3200 rpm at 60 mph
Best et was 11.49 @ 116 and it got pretty good milage as it seemed to be around 12 to 14 mpg keeping the foot out of it
I also drive my new combo in the car now everywhere and on the highway. Its very streetable but has more cubes and better heads to run 10.70's and it eats alot more gas then the old 440 did.
Herr_Poopschitz
Well-Known Member
I'm curious...what valves, rockers, pushrods, and springs/pressures were you using?
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