Size difference between the BBC & SBC

[Guest BoostedZ350]

I don't have a BBC here to compare to the SBC I have, but I was wondering what are the measurement differences of the BBC and the SBC? I might just go BBC if I can. Will the BBC bolt up to a 700r4? I am just worried if I go with the BBC I might not have enough room for turbo manifolds/exhaust. The distributor might give me a problem as well. What are the thoughts of you guys?

[280z-racer]

i know a BBC is much larger than an SBC. it will bolt to a 700R4 but i dont recommend it.

[grumpyvette]

http://www.westechperformance.com/dimensions.htm

 

http://www.performanceunlimited.com/documents/engineweights.html'>http://www.performanceunlimited.com/documents/engineweights.html

 

http://www.performanceunlimited.com/documents/

 

http://www.team.net/sol/tech/engine.html

 

http://www.jeepgod.net/enginewts.html

 

the distance from the firewall to the distributor changes very little between the bbc and sbc, motor mounts generally bolt up to either block but can be differant, most of the differance in length is forward of the engine mounts, useing aluminum heads,intake and water pump on a bbc can get the weight down significantly (generally within 50-80 lbs of a sbc) use an aluminum block with those parts and a bbc can easily weight less than a sbc with an iron block

aluminum bbc blocks generally cost $3600-$5600, or about $1800-$2300 more than the same quality iron block, that $ saves you about 100lbs and the ability to easily weld/repair the block if its damaged while cast iron blocks generally get dumpstered if seriously damaged

the aluminum blocks are actually a good deal if you can afford the differance in price

 

 

http://www.worldcastings.com/docs/05_cat_pg7.pdf

 

http://www.brodix.com/Alum%20Big%20Block.html

[80LS1T]

If your going to go with a turbo set up stay with the SBC. You wont need the extra cubes to make up for the power because you'll have a turbo or turbos.

[Guest BoostedZ350]

If your going to go with a turbo set up stay with the SBC. You wont need the extra cubes to make up for the power because you'll have a turbo or turbos.

 

Your right I guess on the cubes part. I just figured there is no replacement for displacement. But a gt46 turbo will sure do the trick lol

[wingnutthehutt]

If you throw a big block in there, you're going to have massive increases in torque, which would be great for the drag strip, if you could get it to hook up, but not much good on the street. Yeah, it'd be cool. I have a BBC sitting in my garage right now, but it's not going in my Z. Too much weight, too much torque, and the grin per dollar would go down a whole lot. Example, my dad has a 69 el Camino with a BBC that's bored a bit, cams, good iron heads, and NOS. It pumps between 350 and 400 HP as a mild build, off the bottle. My 383 when it's done will be around 450-500 HP. 650 if I can talk the guy I work with into letting me put his V-trim supercharger on it. I'll have about the same amount of money into the small block as my dad has into the big block with more power and less weight. IMHO, if you want to be different, throw the big block in there, heck, throw a 928 motor in there, God knows I've thought about it, but if you want reliable good ol' fashioned fun, stick with the small block.

[grumpyvette]

http://www.racingjunk.com/exec/ca/view/432441/BBC-572-598-Short-Block-DART-EAGLE-assembled.html

 

yeah, but start with 598 cubic inches add a good set of heads, a pro nitrous fogger, ETC. and a roll cage, a dana 60 rear diff., slicks, etc. and you can eat turbos for breakfast, you just don,t get the same tq curve, a high compression nitrous big block near 600 cubic inches has, and theres always those aluminum blocks if weights a big deal

 

 

http://www.worldcastings.com/docs/05_cat_pg7.pdf

 

http://www.brodix.com/Alum%20Big%20Block.html

 

then Id look thru the ADDS on USED RACING ENGINES

 

http://usedracingparts.com/cgi-bin/...s.cgi?md=search

 

http://www.autoracingtrader.com/racing_engines.htm

 

 

http://www.racingjunk.com/exec/ca/browse/6/

 

starting with a base like this is a senceable start

 

http://www.racingjunk.com/exec/ca/v...-assembled.html

 

 

did I ever mention I build a lot more BIG BLOCK ENGINES??? theres a REASON!

[tfreer85]

You could run a setup much like engine masters magazine did to get 427CI out of a Small block, a similar design to what some stock/outlaw circle cars run in which you run a 4" crank, 5.85" rods and 20cc pistons in a tall deck 350 block. The bore I believe was 4.125 to get displacement out to that number. I'm out of town but I'll post all the specs when I get home. Lunatic makes the kit that I'm talking about http://www.holley.com/products.asp?product=EA68 except it has a 6" rod. The motor the Engine Masters built produced 570ft/lbs of torque and close to 545HP.

 

Tyson

[Pop N Wood]

From what I have read hear, most BBC in a Z have hood clearance issues.

 

Do a search. There have been some pretty good discussions on BBC in a Z from guys who have done it.

[Guest BoostedZ350]

Forgive me for being dumb, but can anyone see the price for this kit?

 

http://www.holley.com/products.asp?product=EA68

 

Also, what are ya'lls thoughts on this motor here?

 

http://cgi.ebay.com/ebaymotors/383-427HP-VORTEC-CHEVY-CRATE-ENGINE-NEW_W0QQcmdZViewItemQQcategoryZ33615QQitemZ8030375322QQrdZ1QQsspagenameZWDVW

 

Does anything think the motor listed above will have problems with running 8-12 psi of boost?

 

Final questions, has anyone used a Rayjay Turbo setup? It's a blow throw the intake mainfold style turbo kit. I was going to modify it to have an intercooler as well. Just wondering if anyone has ever seen these before? They came on some of the transam's I do belive in the late 70's early 80's. I know it's not the best turbo kit out there, but it's cheap, and I figured I would try something different first.

[savageskaterkid]

Depending on if you are paticular to a certain BB, you could also go with a BB Olds, my buddy has a Olds 455 bored to 470, and its one inch longer then the standard small block chevy. They came out of the Cutlass 442, and they are always in the trading post, and i see them on ebay all the time. Hes got about 550hp and 550ft/lbs, but he hasn't dynoed it yet, so its an estimate

[Turbo Meister]

has anyone used a Rayjay Turbo setup?

 

I'm using 2 Rajays on my 383 Chevy engine. They are 15 years old but work ok.

 

I don't think I would have bought them because they are primitive but a friend gave them to me. There are only 3 compressor sizes and limited turbine housing sizes. Bearings are semi-floating and not water cooled.

 

But I'm not complaining.

Hanns