list your 400 or 406 sbc combo's here,,, what works the best for you
Hey guys,,,,,, lets see what your running (pic's?)
Some of you might already know from a past post but I have been working on my 406 the last couple weeks, thinking of trying some different combo's out at the track, so LIST your combo of your 400 or 406 sbc here,, lets see what you got and how it runs, drives and sounds,, all by the way all out racing combos are just fine to list i like hearing what works the best in everyone rides,,, but the STREET cars out there that can drive to the track and run some good numbers and drive home is what i would like to hear about the most...
HERE is what i have a 1955 chevy w/ 400 .30 over (406) that has pop up dome pistons i think around .200 dome.. hyd 500 lift cam and a set of 76cc 882 heads on it 2.02 valves...750 Holley, victor jr intake, and a good msd...350t trans 3500 stall and a 9in ford rearend w/ 389 gear,,, shifts at 5500 rpm... the car only has been running 12,98 on slicks w/o exhaust, that why i have been playing around with the combo to get it a bit faster,,, its best run was 12.32 this year with a 125 shot of NOS..... i drive it on the street almost ever weekend........
Feel free to post pic's of your rides and thanks for posting
Your car looks typical of so many of these classic Chevrolets; firewall beat in for big block install at one time, fenderwell headers another, cutout rear wheelwells for slicks. Seems every owner does something different to one of these old cars. Mines a 56' Sedan Delivery and I was setting it up like an old "Junior Stocker"; now it's a full on 327/4-speed/57'Olds 4.88 Posi. The only cutup part of the car was someone removed the firewall supports (?). You're farther ahead than I am though. Looks like you're having fun with it!
Here's one for the pile:
2-bolt factory block w/Arp studs w/Milodon tray
.030" overbore w/ torq plate and decked to 9.00" ht
Stock crank at .010" undersize, Stock 305 rods w/arp, resized(chosen for their light weight)
TRW 2477F .145 solid dome w/.100" of dome removed to lower the compression (a flat top was not available in 1992)
Dart Sportsman II w/2.055" intakes, ported 265cfm@.600"lift, 1.6" exhausts 195cfm@.600" Approx. 210cc runners
Chambers opened up around intake valve and polished to 68cc giving about 10.9 to 1 compression w/pistons .004" to .008" down at TDC
Crower Flat solid cam, custom, 260/266 dur.@.050 .582/.595" lift 106 Lobe separation 102 intake centerline w/roller rockers
Victor Jr intake w/Holley 950 3-barrel(faster than 780VAC, 800 and 850 DP's by 2 tenth's) and 1" spacer, needed 50cc pump on carb
1 3/4" x 3" Husler coated headers w/ 18" collector extensions, clutch fan and mech water pump driven 1 to 1 with crank, alternator underdriven
555 HP at 6800 rpm/ 496 lbs/ft @ 4600 rpm. Run only on 92 octane (was no faster on 108 octane)
3300 stall, 4.56 gears, 27x9" tire, reverse pattern T-400
Pushed 3600 w/driver lbs of all steel 72 Nova to 11.40's @ 117 1/4 mile 1.68's in 60 ft on American Racer L-60-15 IMCA dirt tire(dot)
Drive 76 miles to track-race-drive home gets 17 mpg if babied highway/ 7mpg city with vacuum advance all dialed-in
Unhurt after 30,000 miles and 400+ 7300 rpm passes.
Egads-- motor was never balanced but rod and pistons got lightening and weight matching
Down currently for freshening, crank and rods retiring with full pension before they go boom, bearings look fine and piston skirts look like they did new.
Going all-roller, Alum 225 runner 305cfm intake heads at 64cc for 11.8-1, splayed caps, good budget forged crank and rods, Super Victor intake, reworked 3-bbl w/annular rear boosters @ 1000cfm
Hoping for 670 HP @7100 rpm, reusing block and pistons but will be internally balanced crank this time.
Motor was a good stout cruiser, never overheated and didn't load up at idle. Just what I was after at the time, now it's time to go into the 10's
509 block .040 over (408)
probe forged rotating assy with 5.7 rods and ARP bolts
brodix IK 180 heads (64cc)
harland sharp 1.6 rollers
comp cam 280 mag .480 lift (.512 with 1.6 rockers)
670 street avenger
th-350 / 2400 coan converter
3.55 richmonds/eaton posi with 295/50/15
no track times or dyno (yet)
Last edited by gilby246; 04-25-2007 at 08:18 AM.
my 406s really don't apply but here it goes.
400 .040 block on its 2 overbore with 400,000 on it.
6 inch rods
je slugs flat.
htc steel crank 3rd crank
world products 76cc chamber heads 180cc runner heads.(heads were replaced when the stockers cracked at 380,000 miles on them)
comp. cams roller cam xr264hr.. .487 .495 lift 112 centerline.
1.5 roller rockers
speed pro special pitch timing chain... wow the chain is not even made any more.. it is a non roller...
standerd wieght but balanced flywheel.
the other is the same but only .020 over bore and has not been run yet.
406 2 bolt
Sportsman ll heads 64cc
Crane Cams 296HR roller cam
Comp Cams Bee Hive Springs
KB hyper pitsons 18cc dish
Scat cast crank
Victor Jr intake
1.6 roller rockers
Holley 750HP DP carb
1" merge style spacer (worth 10HP on the dyno)
Ported and bowl work on heads and a bunch of other stuff I can't remember.
1 3/4" Hooker Super Comp headers
See my attachments for the dyno sheet and cam card.
Last edited by Steve karch; 04-25-2007 at 09:18 AM.
This motor has not been fired yet. It is going in a 1989 firebird, probably ~3500lbs pretty easily with driver.
AFR 210cc street ported heads
Victor Jr intake
quick fuel 850 carb
248 254 @.050 .600 lift solid roller
hooker 1 3/4" SC coated long tubes into a 4" mufflex pipe with a cutout
As a 383 with the following specs, it ran a 7.85 in the 1/8th which should be around a 12.3 in the 1/4.
holley hp 750 carb
236 242 @.050 .520 lift hyd roller
edelbrock 1 5/8th inch shorty headers into single pipe with 2 mufflers (one replacing cat and one in rear)
turbo 400 tranny 4000 stall
3.89 rear gear and drag radials
It had a little rumble at idle, but nothing radical. The 383 was a mismatch, so I hope the 406 does a little better.
The engine is a 406 ci sbc, standard World Products block, Ohio Crankshaft steel crank, six inch H beam steel rods, JE (13.9 to 1) forged pistons, Dart Alum 230 heads (complete), World Products Motown manifold, seven quart oil pan, SFI vibration damper, SFI ring gear, Proform mini starter, MSD distrib, Comp cams XR292R solid roller pro street cam kit, Comp Pro Magnum roller rockers, Comp stud girdle, Comp true roller timing chain kit, Cloyes timing chain cover with roller cam end play adjustment, cylinder head stud kit, melling oil pump, Holley chokeless race carb 850 cfm, Total Seal Rings, Clevite 77 High-Performance Bearings, complete felpro gasket set, starter ring gear bolts and manifold bolts. I paid $6800. This was two years ago.
Check out my complete journal
Last edited by Quarter Flash; 05-02-2007 at 07:54 AM.
Here's my 408 combo, I'm in the process of building it now. I think 500 HP/TQ is a fair estimate.
-sb 400 (509 block) bored 0.040 over (408)
-Comp ratio around 10.1:1
-AFR Eliminator 195/65cc heads
-Fel-Pro head gaskets (1014)
-Lunati Voodoo 278
-Edelbrock RPM Air Gap Intake manifold.
-Carter AFB competition series 750 cfm carb.
-Long tube 1 and 5/8 Flowtech headers.
-2 1/2" full exhaust with a H-pipe.
-MSD 6A box.
-MSD plug wires.
-Turbo 400 trans.
-Hughes Performance 2,500 stall.
-12 bolt posi rear, Richmond 3.55 gears, Eaton carrier.
Here are the specs on my old 408 that is still mudracing in the street class.
400 block, 511 4 bolt bored .040
Scat 3.75 crankshaft and Scat 6" rods (internally balanced)
KB 7cc flat-tops w/ Speed-Pro rings
Dart 69cc-chamber Sportsman II heads (set Summit Racing sold as their modified set)
Dart Kool-Kan air-gap dual-plane intake manifold
Grant 750VE carburetor
DUI HEI distributor (18 degree timing at idle with 34 degree timing at 3000rpm)
Comp 282XR hydraulic-roller camshaft w/ Crane 1.6 roller rockersi(used for 14" vacuum at 800 rpm)
TSI 2800 stall in built t350 pushing 4.10/4.11 gears with lockers and 35" boggers (best time 5.00 flat in 200" mud drag in McLouth, Kansas in 2006)
434 Motown block; Eagle 4" stroke crank and 6"rods; JE pistons/rings; 14.2:1 compression; Herbert Roller cam CCR274/112 .686"/.739" lift, 112 degree centerline; 33 degrees total timing; Jesel belt drive; T&D shaft rockers 1.65 ratio; Chevrolet 18 degree heads 2.15/1.625 valves; KMotion springs @ 235#; MSD 7AL#3; 4300 launch; 7300 shift; 7600 cross; EGT 1215 degrees; Rons Alky Toilet on top of Edelbrock Glidden manifold; Dynatech 2" upswept headers; Powerglide; ATI 6200 stall super 8" MRT converter; Ford 9" 4.30 rear; 33X15X15 Goodyears; 1650# hardtail dragster; 785 HP at 7400 RPM; 7.73sec at 170.04 mph at ATCO this past weekend. Same combo ran 8.98 in a 3000# Olds Cutlass.
406ci +.030 2 bolt 400
GM cast 400 crank
KB 168 22cc D cup hyper pistons
GM 5.7 rods arp bolts
GM 062 vortec heads 2.02 1.60" manley valves
Self ported flow 246-248cfm @28"
Comp Cams XE284H-10 hyd cam, Crane roller tip stamped 1.5 steel rockers
Professional Products Crosswind dual plane manifold (untouched)
750 custom Holley/Proform DP carb 72-85 jets Carter #P4594elec pump
Long tube 1-/5/8" headers, dual custom built 2.5" exhaust
GM HEI Ignition w/MSD HEI coil and wires "locked out" timing+vac adv Champion RS12YC plugs
Th350trans B&M 3600 super holeshot converter
4.10's 8.5x26" ET streets
3530 LB ( W/driver) 1988 Firebird S/E
email@example.com 1.61 60ft street trim thru the mufflers initial drag testing
More testing to follow
It drives very nicely overall. Cool racey idle PB's work fine.
The Proform main body Holley required a bit of fine tuning to the airbleeds
but once done is nice and smooth.
Check the christmas tree in the pic. The engine responds to the throttle so fast, this thing just wants to leap out of the hole.
Very easy to red light.
Last edited by F-BIRD'88; 10-17-2008 at 05:59 PM.
509 block Crower crank, Crower 5.7 titanium rods, Wiseco pistons, ISKY roller cam grind #RR-280 durathon roller lifters Hamburger alu. oilpan, Moroso oilpump, Brodix -10 heads 2.08/1.6 valves,ISKY beehive valve springs Crane Titanium Valve Spring Retainers.
crane roller rockers 1.7:1 crane stud girdles 13:1 compression
110 race gas a must!
super victor intake
AED 850 DP custom carb
Last edited by dawg; 10-17-2008 at 09:33 AM.
I Have a new 55 chev now,, And i Just built a new 406 for it also,, Full interior car, all motor no NOS and drive it ever day it went 11.81 last week
406 sbc 509 block
pro one heads 2.05 215's 64cc ported and polished,, milled
JE forged 11.6.1 flat tops
5.7 forged rods
1.6 roller rockers
588 lift hyd custom grind cam
850 holley DP
victor jr intake
runs good and strong,,,,, Still hard to start tho
If you are using a MSD 6 or other external spark box, wire a dash mounted SPST toggle switch on the MSD box "power on wire" (small red wire) to interupt the spark while cranking over hot. makes it a lot easier on a hot GM starter to start it hot.
If your distributor is self powered "ready to run" with a internal module just wire in this 15-20AMP switch on the + power wire to control the spark power.
Should cure your starter issues assuming the starter isn't already cooked.
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