Who's been there and done that?
Whatcha build for your A body?
Details people!!!
Whatcha build for your A body?
Details people!!!
I'll start it.
4.15 stroke X 4.375 bore
Big dominator
Big single plane
Big aluminum heads
Big solid roller
Forged pistons
8 quarts of 10w-40
Normally aspirated
E85
928 HP @ 7200 RPM
Big, Wowza!
Big, Schwing!!
Big, OH YEAH!!
Big, I need one!!
LOL
'75 440 block 4.360 bore
K1 4.150 Chevy rod pin crank
Scat 6.800" H-beam BBC rods
Diamond custom blower pistons 1.85" CH 33.1cc dish
Edelbrock RPM heads 2.19" intake valves/home port/bowl work
T&D rockers 1.52
Bullet solid roller custom blower cam .626 @ .600 259int & 270exh @.050 .114
M1 intake
CSU blowthrough 750 carb
D1SC Procharger 10lbs of boost
Pump gas
I know, not quite 500"....Still thought I'd share.
400 low deck block, 4.375 bore, 4.25 stroke for 512 cubes. 2.200 chev rod journals on crank. 6.535 H beam rods using .990 pins. 1.32 compression height pistons with enough dish to keep compression where you need it. If you go E85, set it at 13/1 for use with a big cam.
There are two ways to go from here. Small port route for low rpm torque, or big port heads for max power. Indy SR small port heads flow very well, and can also be ported and opened up to max wedge to flow 355 cfm and still use standard offset valve gear. Going up to a 440-1 head allows for another 25 or so cfm and another 50 to 75 hp when max ported using the right cam, etc. The Indy heads have enough meat in them that they can be cut to 62cc if you need to. I have a 528 RB motor with 440-1 heads cut to 62 cc that is at 15.1/1 compression with a dome of only about .060 high.
Chosing a cam carb and intake system will be dictated by where you want the hp and torque, and budget.
For a moderate budget, all out hp build, this is what I would build-
SR heads cut to 62cc, max ported to max wedge port size. Set the heads up for Beehive springs, for the highest lift possible that those springs will handle.
Wiseco 1.32 compression height pistons, Manley 6.535 H beam rods, Ohiocrank crankshaft if they make the 4.25 stroke low deck crank.
Indy single plane intake for a small base holley
two inch Dominater adapter and a 1050 Dominater for the carb.
High ratio rockers, 1.7 preferred. 3/8 heavy wall pushrods.
Good quality lifters with the EDM hole in the center of the base for direct oiling.
Cam specs should be somewhere around 275 degrees duration at .050 on the intake, an additional six degrees on the exhaust. Lobe seperation will be dictated by the total duration to some degree, but most likely 108 or very close. Put it in at 106 to start, or grinders recomendation.
The 1.7 rockers are for getting almost roller cam performance out of a flat tappet.
The lobe design would be chosen for as much lift as the new design Beehive springs will allow. It is also important to make sure the rate of lift is for a .904 lifter to get the advantage this whole package is after.
If you want to upgrade to a roller cam, then set the spring installed height high with +.100 retainers and also +.050 locks if you need to. Shoot for 2.00 to allow over .800 lift. Better rocker arms are needed, along with thicker pushrods to handle the seat pressure that you will need. Again, use 1.7 rockers. Seat pressure can very some depending on which springs you use. If you go with a big triple like a comp 947 they install at 2.00 with 340 on the seat. Trust me, you need this much spring to run an aggressive roller cam. I picked up 40 hp switching from "enough spring" that had 225 on the seat to these monsters. There are better double race springs out there also that will fit the application. For an off the shelf cam I used an Isky RR735 for my 528 on the first dyno session. It made 847 hp with alky, and is not that big of a cam at 280/288/110 . To get the best out of this cam, a higher ratio rocker should be used on both sides. I had 1.55 Jesels on mine, but Isky said I could go to 1.65 ratio for .808 lift. They might even agree to 1.7, but you need to call them and check.
At this level of roller cam (aggressive +.800 lift) it is pushing the limits of the cam core size, and you will notice that the cam flexes as you rotate the motor to set lash! I see .003 in spots. Keep that in mind when you select intake valves. If there is a hollow stem steel intake valve available, I would install them. If not, a Titanium valve will help make more power because it will reduce deflection in the valve train and won't bounce as badly when it lands on the seat.
For the oiling system you will need at least a 9.5 quart pan and an external pickup to properly feed this animal. For safetys sake, use good 20w50 RACE oil. Set the oil pressure from 65 to 75 psi max.
Headers can be 2 or 2 1/8 inch by 32 long with 3.5 inch to four inch collecters. It would be best to run the PIPEMAX program to pick out the header sizes.
Rpm range will be about 6800 to 7,000 shift points. This combo should make somewhere between 725 and 750 hp and still be relatively cheap(if that is possible!) to build.
I have run the Mopar 590 cam using L88 chev springs with 1.75 rockers on a stroker in the past, up to 6,000 rpm. The lift with that deal was a theoretical .688, or .662 after lash. The new Beehive springs are said to extend that range 1,000 rpm with the same or less seat pressure. When the cam is chosen, be sure the guy that you talk to to select the cam wants to run a fast, high lift exhaust lobe. That has proven to work much better than the low lift long duration lobes that were the rage in the past.
505" RB wedge:
'69 440 block - oil passage/drainback mods, stock pickup size, main studs, stock caps, deck set at 10.700, bore 4.350
Melling std oil pump w/high pressure relief spring
MP windage tray
Stock Hemi pan
4.25 stroke Source crank
7.1" Source rod
17cc dished Source pistons
Speed Pro file-to-fit rings
internally balanced (not by Source)
RPM heads - Stage I cleanup, Serdi valve job, gasket matched intake ports, minor chamber shaping, 80cc chambers
10.8:1 static, 8.4:1 dynamic, .034" quench distance
Crane 1.5 rockers
Smith Bros push rods
Felpro Performance head gaskets
Engle custom solid flat tappet 260/268ish duration @ .050, .600ish lift.
Edelbrock six pack intake, new Holley carbs w/Promax plates
MSD distributor/hidden 6AL
Installed with TTi headers in E body makes around 490tq 475hp to the tires on pump 91. Assembled, run to break in cam, retorqued heads, installed inner valve springs, oil changed & ready to drop in and run $10,500.00 with his block.
2x WOW!!! Would like to see some pictures of your mean machine.
I'll start it.
4.15 stroke X 4.375 bore
Big dominator
Big single plane
Big aluminum heads
Big solid roller
Forged pistons
8 quarts of 10w-40
Normally aspirated
E85
928 HP @ 7200 RPM
nice! What compression?
I have a cupel of good cams you can try if you wont them all for stock rockers and highdrallic and I also have a set of the old crane roker arms if you need them??call me if you still have my ########I cant find yours or Id call ya!let me know..........ArtieThanks Artie, just swishing the water around with my big toe wondering what people are building/doing/running.
Current, I have a 400/727 in a '71 Duster. The current 2.94's will be swapped out for 4.88's once I do the tub's for tires. For the mean time, I'll just (heavily) cam the 400 and use the just received M1 single and a large TQ for the street. The B body headers will do for now I to the 2-1/2 exhaust pipe.
I may just stick with a high reving 400.
I still need to rewire it , fuel line, rims/tires and get a driveshaft for it. Then I'm good to go. Oh, and a drivers seat. The milk create is a little ruff on the bottom side.
And now that I think of it, since I like creating these kind of threads, here's the new one---> http://www.forabodiesonly.com/mopar/showthread.php?p=1970220403#post1970220403
77' 440 block
Bore - 4.375"
Stroke - K1 4.15" crank 2.2" journals
Rods - K1 6.76" ARP 2000 bolts
Pistons - Ross flat tops .990" pin
Pistons are .007" in the hole with .047" quench
11/1 compression
2275 gram bobweight
Hughes main girdle with stock caps
Milodon external oiling
Comp solid flat cam and EDM lifters
Intake .662" lift 267 duration at .050"
Exhaust .672" lift 271 duration at .050"
110 centerline degreed at 106
Harland sharp 1.6 rockers
Heads are Indy EZ-1 set up and ported by Modern Cylinder Head
84cc closed chamber
Titanium retainers
Indy single plane intake with 1000HP carb run on 93 pump gas.
749hp at 6,500
669tq at 5,300