383 versus 434, all things being equal...

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Jul 28, 2003 | 12:53 PM

#46

kmook

Advanced Tech Moderator

Joined: Aug 2001

Posts: 2,262

From: Nashville

Quote:

Thats great!

Oh and BTW i still have my eye on the little M project bud

Jul 28, 2003 | 01:14 PM

#47

SStrokerAce

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Joined: Oct 2002

Posts: 6,518

Quote:

Originally posted by Joe Racer
I just dyno'd a pair of 588 BBC boat engines that we built. Here are a few power numbers you might be interested in.....
3400 rpm 655.1 tq 424.1 hp
4800 rpm 697.4 tq 637.4 hp (peak tq)
5600 rpm 659.7 tq 703.4 hp (peak hp)

This is on pump gas, and idled smoothly at 700 rpms. For passenger car use, you'd obviously want to use more cam, and rev higher. These were about $11,000 each, but were built using very high quality new parts.... Dart block, AFR heads, Callies, etc. I'm sure that if you were resourceful, and found good deals, you could have similar results for quite a bit less money.

1.18 ft lbs per cube and 1.19 hp per cube, to make that relative to most LT1 guys thats a 450ft lbs and 457HP 383 LT1 (390/390 rw) Basically what guys are getting with a ported LT1 head 383. That's were the BBC advantage is, it's the cubes. A 775-800hp 588 could be done pretty easliy for a car I would imagine.

Bret

Jul 28, 2003 | 02:46 PM

#48

Fickle

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Joined: Jan 2003

Posts: 92

So, where can I find a standard bore 454 4 bolt? ...or I'd take a block that'd clear .30....

Jul 28, 2003 | 05:17 PM

#49

Jeff Belloma

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Posts: n/a

Quote:

Originally posted by Fickle
So, where can I find a standard bore 454 4 bolt? ...or I'd take a block that'd clear .30....

if you are starting from scratch you might as well start with a gen 6 502 or build something larger. 502 shortblocks from gm are under 4 grand and while we're on the subject, you might as well just go with a crate engine. a step up to 496, 509, or 540 ci can be had in shortblock form for about $4800. complete longblocks are in the $7500-13000 range just depending on what you want. like i said, a crate motor is a good place to start.

i still say that for your goals, a small block will get the job done with the right car setup. it will not be nearly as streetable as a bbc but can be built relatively cheap. we've been putting big block cars on the trailers for a few years now so when it comes to race engines, there's a bit more involved.
knowing your budget would help a good deal in making the decision.

JB

Jul 28, 2003 | 07:08 PM

#50

Fickle

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Joined: Jan 2003

Posts: 92

I agree that I need to come up with a budget. $4800 for a shortblock is much more than a well built 383 with the numbers I come up with...I come up with right at $3000 for a 383 with 4340 rotating assembly, SRP or Probe forged pistons, oil pan, balancer, etc....and I really don't mind it being "radical." As a matter of fact, I would rather have a radical small block that runs 10s than a mild big block that runs 10s. I just love the sound and character from a beast of a small block...I mean, it is a weekend cruiser/bruiser so why not scare people with it's lope?

Jeff, a guy here locally has a late model 350 4 bolt prepped and ready to go for $575 so I may just pick it up....But if I just wait to buy a car then it'll have a good motor in it, I hope....