I saw the post in the thread about the scaled down model V8. It referenced a guy with a very small cubic inch SBC. I know that these mills aren't practical and are only used (majority of the time) for class rules in a race series. But I like to read about tech topics and hear the stories. The threads on here about the 302ci sbc are classics. So does anyone have any expierence racing in a class or know of someone that built a tiny monster for whatever reason. What's the smallest small block recipe you can think of? Thanks guys.
my '55 is powered by a 283 punched out .060, makes it a 292 now, with 12-1,old f.i. heads,aluminum flywheel.just for fun and old time sake
With the proper crank and block it is possible to make a 231 ci sbc, used to be a popular motor in the complicated eliminator classes.
I'm building a 302, 283 crank in a early 327 block with double hump heads and a cast iron 4bbl 'H' intake to put in my 65 mid injun vair. Want a high winding screamer with no torque. Hopefully i can keep the diff from grenading.
302 sounds sweet. Any info on the 231? What crank and block were used? And are Chevys the only small cubic inch revers people built? I have read alot about high revving 302 chevies and small cubic inch "fun" power plants. But not really about any other brand. I know that the factory chevy 302 came about for class rules in trans-am racing. And Ford and others were in that class slugging it out. But the Chevy is the only motor I hear people talk about reproducing.
Me 2 only going a 350 block and spacer bearings for a stronger bottom end The M/T indy car ran a 306 i'm assuming a .030 over 301
Ford already had a 302 4" bore 3" stroke, but because Nobody ever built a Limp 2bbl chev 302 and ford did the chev is a legend and the ford isnt....and also because chevy's are better than fords Something else to consider most fat old street rod guys never take their car above 4000 rpm under load right about where you start running out of juice with a long stroke 383 but also where a 301 picks up. So your average old street rodder will think a long stroke motor is the way to go when really preformance wise a short stroke motor can be a better hot rod motor in the right hands
Put a 283 crank in a 327 block with a solid cam and balance it. You got a 9000 rpm motor. they're good because they have the same bore as a 350 with the stroke of a 283. I believe it has to do with the larger surface on the top of the piston relative to the short quick stroke and low rotating mass. They're near indistructable but have little torque. Just gotta rev the shit outa them and dump the clutch....and find the weak link.
When I.H.R.A. had no minimum weight,Grumpy Bill Jenkins built very light Vega's with very small motors and went very fast.The grump was beating Sox & Martin's hemi's with 260 c.i.
fathack told me how to build a 250 chevy v8 out of stock parts. i forgot what they were but it was cheap 70's junk i think.
Yup thats it,, I dont remember all the specifics, just the number. I do remember that it can be done using off the shelf components, rods pistons and such. Someone chase the Squirrel in here, he probably knows!
Theoretically- that is your best bet for performance out of a small/small block. A 300 c.i. or smaller "stroker" would just be a waste of time. The higher revs call for a long duration cam and a compression ratio to match. Do some research on static compression ratio with regards to cam duration-- If you are good to 7000 rpm plus you can run a long duration cam with 11 or 12:1 on pump gas--- and scream!!
No, a 283 crank in a 327 block is a 301 cid sbc. A Z-28 302 is a forged large journal 3 inch stroke crank [yea, 283] in a 4 bolt main 4 inch bore block [327, 350]. Then you need the good rods, the good heads, the big carb, etc... THAT'S a Z-28 [clone] motor. I'm not trying to be an ass or anything... Just pointing out that there's a difference between arriving at a particular CID with a combination of random parts, and actually cloning a legendary engine.
Someone was telling me ages ago about a Pontiac small cubic inch formula. Seems like you got about 300 CI - used a '56 block with a later top end, but I'm not sure what crank. But it was all stuff that was pretty cheap to come by, just needed to be machined up.
The smallest factory sbc was the 262ci made in 1975-76. Bore and stroke was 3.671 X 3.100. Next was the 265ci, 1955-56 with a bore and stroke of 3.750 X 3.000. The 262 was rated at 135HP (I think) and made at the height of the low HP, shit smog motor era.
Guess you have never driven a HO 5.0L mustang. Those things haul ass with 302 cubes. Smoked a TON of camaros over the years. Try getting a 305 camaro to do the same out of the box, yeah right! Not to mention that camaros were piles of junk until the last generation, which are still crappy built cars with plenty of problems...but the later GM motors are very fast.....but then ford went to a 4.6L and it keeps up just fine with GM's 5.7. I have driven a lot of cars over the years, some better than others, each is different and each serves it's own purpose.
Here is a link to SBC history listing all the bores and strokes. http://www.hotrodders.com/forum/history-chevy-v8s-61878.html
In 1967 a Z-28 optioned Camaro had 2 bolt mains and a small journal crank. A 327 block with a 283 crank. In 68 they went to large journals. Bob
Once apon a time I read Chevy had 302s back in 1957. During the Black Widow days they bore some 283s out to 4 inch for the roundy round guys. Bob
In 1968 I built a 288 SBC, fuelie heads and cam, 10:! comp. and AFB carb for my '54 Bel Aire. 3-speed stick and 4.11 posi. Lots of fun for a little while! RPM like crazy!
Try to find some NHRA modified production class cars.They have some very small cubic inch motors that turn crazy RPMS.I think most of them were in E and F class.You will have to have very high compression and gobs of camshaft to get the RPMS they spin to make big horsepower.I know of a local E/MP that turns 11,000 RPMS in a 62 Vette.Big money destroked short block,but what a sweet sweet sound.
My favorites, Modified Eliminator. The guy's at NHRA should have been shot for replacing Modified with Super Gas. If my arm was twisted, I could be talked into a BB car like this one.
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