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Radical 355sbc build

 
YoungGunSTL
I love my Chevy Chevette!
Posts: 10
Joined: 03/14
Posted: 03/28/14 01:32 PM

Hey everyone,scratched the build of the 454 and have made up my mind to build a hot 355. Bottom end will consist of
scat 4340 crank,forged h beam rods, and a set of je dome top pistons that make 11.2:1 with a 64cc head. As for top end I'm looking at a set of RHS 235 iron heads 64cc. Are these heads too big for a 355? The cam i will be running is a Hyd flat tappet .560 lift pbm cam with a victor jr intake. Power band for cam and intake are start at about 3000rpm. looking to make upwards to 450hp.  

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shyrgfuh3
V-6 Camaros rule!
Posts: 67
Joined: 01/14
Posted: 03/28/14 02:00 PM

wow, ok;

well what block are you going to use.

you will need straight racing fuel.

i think those heads are chinese and do not flow well, you will need to port them.

i would buy real heads like some afr 205's.

you need arp rocker studs and a stud girdle or pedestal mount rockers like jessels or scorpion.

windage tray

crank wipers

have the crank knife edged.

i would not count on a scatt rod holding up on that thing but it might. i would buy crowers, manleys or carillos etc.

you need 4 bolt main caps.

i would buy an ati dual inertia ring crank damper.

of it is an auto, you might need an anti balooning torque converter.

cam should be a solid lifter.

1 step colder than stock spark plug.

race carb like a 650 - 750 dominator

what cam is it exactly?



4150 dominator street carb.

http://www.summitracing.com/search/part-type/carburetors/brand/holley/carburetor-flange/holley-4150-dominator?SortBy=BestKeywordMatch&SortOrder=Ascending&keyword=carburetor%20holley


dominator race carb with annular boosters.

http://www.summitracing.com/parts/hly-0-80186-1/overview/  

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Dave632
I mow my lawn and find Chevys
Posts: 2253
Joined: 07/08
Posted: 03/28/14 04:47 PM

I would personally go with your first choice, the 454. Much easier to get the Hp you want and still be somewhat streetable.
The SB will have a much tougher time making that kind of HP and remaining streetable. It will also cost more in the long run and not be as reliable.  
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Dave632
I mow my lawn and find Chevys
Posts: 2253
Joined: 07/08
Posted: 03/28/14 04:47 PM

I would personally go with your first choice, the 454. Much easier to get the Hp you want and still be somewhat streetable.
The SB will have a much tougher time making that kind of HP and remaining streetable. It will also cost more in the long run and not be as reliable.  
[[SUPPORT AMERICAN CARS, STOMP A RICE CAR TODAY.]]

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YoungGunSTL
I love my Chevy Chevette!
Posts: 10
Joined: 03/14
Posted: 03/29/14 05:56 PM

Im still deciding, the exhaust shop blew my last 454 and it really made my el camino scream, different kind of power than my 355 70 monte, got 3 subject 454s, the one im leaning on is flat top 1973 motor, but everyone is saying im going to need a whole new bottom end to support decent power (400+) my goal is to build a motor to give my friends ls6 cam and heads ls1 camaro. Appreciate the help  

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YoungGunSTL
I love my Chevy Chevette!
Posts: 10
Joined: 03/14
Posted: 03/29/14 05:57 PM

Im still deciding, the exhaust shop blew my last 454 and it really made my el camino scream, different kind of power than my 355 70 monte, got 3 subject 454s, the one im leaning on is flat top 1973 motor, but everyone is saying im going to need a whole new bottom end to support decent power (400+) my goal is to build a motor to give my friends ls6 cam and heads ls1 camaro. Appreciate the help  

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YoungGunSTL
I love my Chevy Chevette!
Posts: 10
Joined: 03/14
Posted: 03/29/14 05:57 PM

Im still deciding, the exhaust shop blew my last 454 and it really made my el camino scream, different kind of power than my 355 70 monte, got 3 subject 454s, the one im leaning on is flat top 1973 motor, but everyone is saying im going to need a whole new bottom end to support decent power (400+) my goal is to build a motor to give my friends ls6 cam and heads ls1 camaro. Appreciate the help  

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YoungGunSTL
I love my Chevy Chevette!
Posts: 10
Joined: 03/14
Posted: 03/29/14 06:00 PM

A guy builds 468s in my area for 2800 dollars that have a warranty, thats my last option, id rather put mine together and have pride in personal build than paying a guy to do it but if the money is too much of an issue building my own i will lean towards this guys build.  

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68scott385
I mow my lawn and find Chevys
Posts: 1994
Joined: 10/09
Posted: 03/29/14 06:33 PM

A 450+hp naturally aspirated small block is a radical rascal. It's takes a bag of tricks to get 500+hp from a small block. A 450hp big block isn't even working. Getting 500hp from 454ci isn't difficult and is much less radical. If you plan on driving it mostly on the street you'll get tired of it's quirkiness quickly unless you're under 25yo or live in Farmville. JMO  
68scott385 68scott385 68scott385

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Dave632
I mow my lawn and find Chevys
Posts: 2253
Joined: 07/08
Posted: 03/30/14 04:49 AM

Scott is right, it is much easier to get the power you want out of a 454BB.
2800 seems like a low price for a 468 with a guarantee.  
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Dave632
I mow my lawn and find Chevys
Posts: 2253
Joined: 07/08
Posted: 03/30/14 04:50 AM

Scott is right, it is much easier to get the power you want out of a 454BB.
2800 seems like a low price for a 468 with a guarantee.  
[[SUPPORT AMERICAN CARS, STOMP A RICE CAR TODAY.]]

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