Bbc ????

Ok, I think Ive decided to go with a standard BB, Now all I need to know is what I need to build it...Ive found a 396 and a 454, the 454 is a brand new genvi block...Which one should I get????, both are stock bore...Im running it in a 69 camaro...I would like around 550hp on pump gas,its going to be driven on the street alot...If anyone could give me a parts list, so I can go shopping that would be great...If anymore info is needed just ask.....

thanks Harmon

What is interchangeable on the BBCs between the GENs...ex heads cams anything?
Im not a BBC guy this is a first for me

thanks harmon

Most everything will swap between them. You'll need a adapter to run the 2 pc. crank in the new block. Thats one option,drop the 396 crank in the 454 block and you get a 427. Use the older heads if they are decent castings and set up w/hard seats. Don't recall which head gaskets you need to use,but I'm sure all it takes is a call to any of the gasket companys to find out. If the 396 has the good 'truck' rods,they are the better of the factory 3/8 rods.Unless you happen to have a set of 7/16 laying around,thats all you need.
A good rebuild and properly picked 'standard' hot rod stuff and 550hp isn't hard to hit.

Doug

you can not run the gm mark 4 heads on a mark 5/6 engine i have never seen the truck/ thumb rods ever used in a 396 the stock 3/8 bolt rods should take 500 hp with good bolts .if you do, not have any rods you would be better off with some I beam scat rods

I plan on starting with a bare block, and plan on running alum heads with I beam rods, and a roller cam. Im not sure of what heads, cam, intake, rod length...I thought about using a 4.25 stoker crank in the 454, but whot rods would I have to get? or I want to put a 4.00 crank in the 396, and again not sure of rod length? I have heard that the 396 blocks are weak?

Thanks
Harmon

396 block weak NO .if you use a 4.00 crank in a 396 and use the KB pistons you would use a stock rod of 6.135. if you build a 496 you can use a stock 6.135 rod but you can get a 6.375 rod for it and buy spr pistons every one makes shelf pistons for a 496 build

Which of the two should I get, Like I said its a street car, but I want some power...What heads and cam should I be looking at? Ive never built a bb so Im not sure of what parts go together for these....I dont want to spend a bunch of money on something that does not preform as good as it should/could...

Thanks alot for the info
Harmon

it will be easy to get 500 hp out of a 496 what parts you need ? this would have alot to do with money you have

http://store.summitracing.com/partde...5&autoview=sku

These are the heads I was looking at, are they ok... Im not sure of what cam, pistons

How much can a 396 be bored, and what would the the best stroke crank to put in it? 3.76, 4.00, 4.25....

them heads would work with a small roller cam with 10to1 cr .you really have not said what RPM you want to run at this has every thing on how you build it .you should be looking at TQ and not hp

Quote:

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Originally Posted by CHEVYBOY

How much can a 396 be bored, and what would the the best stroke crank to put in it? 3.76, 4.00, 4.25....

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you will have to buy the 4.250 crank and custom pistons for the 396 the pistons would be about 800 just for the pistons.. there is no way i would wast the money when you can get 512 out of a stock 454 gm block

Thanks, this is the stuff I need to know..

I would like to get 5500/6000 rpm out of it, and pull strong off the line..Either Im going to put a four speed in it or a 700r4 with like a 3.23/3.331 rear..

newbie here, with those heads you can order a rotating kit from eagle to handle 500-600hp for 1400. the part number is b18021l this kit will let you run pump gas if the cam is right. that kit comes in std all the way to .100 over bore....like mr maccarty said a good roller cam would do you good. for 500hp a rpm air gap will work and a 4150 holly 750. cam spec somewere around .550-575 lift those heads crap out around there. duration hi 240-50 at .050 should do well. just make sure you spend a little to have a pro look at the head and set them up for your cam.. don't trust the out of the box heads and just throw them on. i have seen way to many screw ups from ready to run stuff. good luck with it.

What kind of CR should I be looking for, I was thinking 10.5:1...

Thanks Im trying to do alot of research before I start buying..

Harmon

10 to 1 will should be fine.... i don't know what gas you can get there... i can get 94 but alot of places can only get 91-92.... the cam is one of the biggest facters in running compression...the cam can beeld off pressure so you can run static compression higher...

I see this a lot. The 700R4 was not designed for the torque of a built BBC. In fact many built 700R4's fail prematurely behind built SBC's from what I have seen personally and read/heard. The cases are fundamentally weak leading often to bearing misalignment and premature failures.

Use a built TH400 and if you need the overdrive get the Gear Vendors unit and you will then have a 6 speed transmission. Only $2600 for the OD unit though. :eek:

I build the 700R4 for clients all the time for the quarter mile runs. The most recent was for a Big Block powered Monte Carlo putting out over 625 hp and 780 ft lbs of torque. The point is, it was three years ago since the original build and the most recent teardown was for clutch and band freshening along with just a solid inspection. No problems showed up and and it still clicks off 10.10's on a consistant basis. 700R4's can work if built right.

Maybe I ought to send one to you???? How much would it to have a stout street 700r4 built?

Thanks
Harmon

I think Ive decided on a 454 stroked to a 496....I still would like to know a good head to run, ex.. combustion chamber cc, intake cc, valve size..I was looking at the Brodix Race-Rite heads or the BB 2-Plus, or the Edelbrock Performer RPM heads...Im not sure if I should use a round port or the rectangular port....

Thanks so far guys,
Harmon

if your runing only to 5500 a set of O ports should work fine if you are moveing up the power band then a set of small rect ports would work good to

Thanks,
I plan on driving the car on the street alot, so my neighbor told me that rect port are to big for street cars??....I would like to get 550/600ft at a relatively low rpm(2500/3000)...

AFR make a nice set with a 305 intake runner, I would have to get all the spec's...It sounds like a good medium range head...

I just want to make sure I get the right parts for this build...

Thanks again
Harmon

that funny your heighbor said that... he runs a 496 ? not that small of a engine but the Oports will work good and have used the gm990 head on them to with good size hyd roller cam s like i said the power band would go up abit to use the rect ports with a 4 speed trans 320 gear i do not think you will get there

He is building a 454 and a 540, Hes running the Edlebrock rpm heads #6045 and the Edelbrock cam #7162 with a CR of 9.6:1 on the 454.. I t is suppose to make 540HP@6k and 540ft/lbs@3k-45k...I would like something with alil more snot...Thats why I was thinking about running a lil bigger head and roller hydl bump stick, and take the CR to about 10:1...

What do you mean "I dont think youll get there"???

how tall of a rear tire with a 330 or so back gear and a 4 speed you will de going what rpm? not very hi

chevy, do you have something that says he has that much?? i'm not trying to be a asshole but i run into hundreds of guys with 600hp engine that i run away from with a real 500hp.. 600hp pump gas 496 isn't just you run of the mill big block. there some though a cash that goes into something like that. i would go with a little bit bigger head then needed just because fast is never fast enough and having head in the bank is nice thing. hyd rollers?? i don't use them so i might not be the right guy to comment in those. i would run a smallish soild roller with the right spec's so you don't rattle the hell out of it with pump gas. just remember listen to just one guy because cross one of us with the other will only get you into trubble. find someone you trust and stay there.. good luck.

Thats one reason I was thinking about runnig a TkO600 or a T56/ or a 700R4...

I want to run somewhere around a 26"tall tire

500caddy,
My neighbor used a build sheet from a Edelbrock 454 that was dynoed at those numbers (not saying his is going to be the same but it gave you a good base to build off of(lot of varialbles))...

Do you have to adjust solid rollers as much as solid tappets?

Thanks guys,
Harmon

i run all solid rollers in all my cars i sell solid roller to guys that pay me to set there valve train. you do not have to go thru them much. but guys that do not like the sound or can not set there valves they get hyd rollers

I have never dealt with a roller cam/building a BB...All this stuf is new to me so thank you so much for your help...

Harmon

Is a solid roller good for the street?

if you came to me and said build a engine .i would look at the real use what i mean by this is are you driving be low 1500 in town and driving below 3000 then i would look at tq and build the engine for this. BUT if you want max power and not driving at low speed then i would build something more of a power band the heads intake cam cr will have alot to do with it not just a number .that will not help if your trying to drive it to church and back you will feel TQ and will make it fun to drive all the time .a hi hp engine may not turn on below 2500 and you will be on the boil with alot of gear and stall .that s what you may think you want? but after some times this may get old less you want this type of engine. that will not like rolling down the road at 1800 just past the idle of a engine of a big hp engine

Thats what I mean, I dont wnat something that is a pain to drive, but I do want something that When you put the pedal down it kicks like a mule....I want a high torque number at a realtivly low rpm, but can pull hard though the rpm range (thats why I was looking at the AFR 305/315 heads, kinda middle of the road on a 496...I think?)...I dont need crazy HP numbers...Im not sure of what cams to be looking at, or CR(10:1 seems to be a good number?)...

Thanks
Harmon

i would stay a round 320 cc or just a bit smaller head would work good i think and a cam like 244/257 @ 050 and 108 lsa around 570 lifte hyd roller cr 10to1 this would be max for what i think you want ?

Thank you,

If I build it it will run....

Ill start lokking for parts and post them, when I find them..

Thanks again
Harmon