sbc drag racing engine...
 

my question is this... i have the chance to build a race only engine for my 3000 lb... race ready vega...should i go with the... 383.... or 377... or 406... i have a good 400... 509 2 bolt block... it needs to turn 7200 at the lights.... any help would be great... thanks in advance.........caveman... :?

Go with the 406" i've got a 377" in 3250 lbs and it has no torque for that much weight, even on alcohol. i had a 406 on gas in the car and ran better and quicker 60' times. But i broke it because i didn't have good rod bolts in the pink rods (boke a rod bolt)
The 377' in my car is a 2 bolt, and the 406" was a 4 bolt blk. Luckly it didn't kill the 4 bolt block and i still have it
JMO

Zip.

X2

hey guys... thanks for the quick responce... i was leaning towards the 406... but do you think it san stand 7200 rpm... i'm running a 32 inch tall tire turbo 350.. bo brake and 5;13 gears ... thanks caveman....... :o

There's no replacement for displacement, so a SBC with 400+ CIs is the way to go! Additionally, I believe a broad power-band in a car like your's (typically with a Power-Glide) is also very important. So, a 4" stroke crank will help with that.

FYI, my SBC 427 stroker with 4" crank will easly turn 7500, but I typically shift it at 7200 bracket racing.

You know it!

406

ok... what compression would you run?? dome or flat top?on 383 or 406? thanks in advance.... caveman :? :? :?

id run a dome with around 13-14:1 if it just gonna be a race car id run some afr heads as well

both 383 and 406

Flat top with 64cc head is around 11.5/1 I have this in my car. last week ran in the 9.80s on pump gas.

1/4 ?
so how much you spraying ?

yes 1/4 mile and no spray

with a small block??????

I'm with Joe on the flat tops, a lot of the AFR heads perform better with flat tops than big domes, something to do with the combustion design of the heads. I know the 388" i built a couple yrs ago did, with AFR 220's angle milled to 58 cc's, it ran 6.30 in a 3,000 lb camero with a toilet bowl on alcohol.

JMO

Zip.

Yes sir 406 with AFR210 heads

SAME HERE 9.90'S IN A 3100 LB MONTE CARLO.

Not saying I doubt your word, but what does your little Vega weigh?

Also, what was your 60' and mph?

Just curious, It looks like the little car hooks pretty good, what's the altitude of your race track?

You would not be the first to question the Monza’s performance trust me I don’t take it personal.
I was surprised my self at the first 2 passes of the year. My previous best was 10.02 made a converter change and some other small changes this winter
Car race weight 2800
Density altitude was 1376ft on this pass
60ft 1.4421
594ft 5.8929
1/8 et 6.3059
1/8 mph 108.94
¼ et 9.8305
¼ mph 139.44

Good job Joe. See you at the track in a few weeks.

Good job, stout little motor . .

We have an almost exact time slip from the 7th . .

except the D.A. was 7200'

And we were running a 498 BBC in a 2785# car . .

Ahhh, sea level . .

I run a 383 sbc, flat tappet cam, Dart Iron Eagle Heads, J E pistons,14-1,SHP Dart block, Hughs Glide Trans, with an APD 817 Alky Carb. We have ran a best of 10.14 at 131.28 m.p.h. at Auto Club Dragway,which is a slower track then Fomoso in Bakersfield,Ca. The car is all steel and original glass and weighs 3125 lbs. with driver.

NHRA Open in Pueblo, CO Friday and Saturday, Brand new Track surface . . Air averaged 7600'. The Ape went 1.41/9.71-140.+ . . The surface temp was 68°. Cool and wet all weekend, but the track was great . .

You flatlanders need to come up here where race cars run like a tow truck . . . Heh, heh . . .