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Author
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Topic: Having a hard time deciding what I want to build!
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white1990stang
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Member # 2307
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posted
 
 
So my previous motor was a blown 306 that was making close to 550hp at the wheels. Im starting from scratch with a 351 based dart block. Having trouble deciding if i want to build it for a blower or build a n/a motor. Im thinking just building if for boost cause i dont think i can get as much power out of a n/a motor. Also im not sure what size bore to order. 4.00" or 4.125". Open to suggestions but i need to make a decision on a rotating assembly very soon
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You must be fast, cause I was haullin ass when I passed you.
Posts: 1308 | From: martinez | Registered: Jan 2003
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93PONY
Mr. Valve Events
Member # 60
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posted
4.125" bore x 4" stroke (427ci)
2 ways I'd do it....depending on what I was looking for.
1. 500+RWHP all motor setup. On the mild side, but plenty of power and TQ to run low 10's at 130ish MPH with a 3200lb Raceweight. You could always spray it for more power....or you could go wilder and get 550+ out of it on motor, then spray.
2. Low compression super mild setup and add boost. 600+RWHP on pump gas wouldn't be an issue....& a LOT more on race fuel.
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www.advancedenginedevelopment.com
SCT dealer
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(916)715-7569
Posts: 4265 | From: Fair Oaks, CA | Registered: Nov 2000
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turbo50
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Member # 6700
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posted
quote:
Originally posted by white1990stang:
So my previous motor was a blown 306 that was making close to 550hp at the wheels. Im starting from scratch with a 351 based dart block. Having trouble deciding if i want to build it for a blower or build a n/a motor. Im thinking just building if for boost cause i dont think i can get as much power out of a n/a motor. Also im not sure what size bore to order. 4.00" or 4.125". Open to suggestions but i need to make a decision on a rotating assembly very soon
Do yourself a huge favor and get the 4.125 bore. I think all dart windsor 9.5 deck blocks use the cleveland 2.75 mains so you are good to go with that as well.
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Posts: 7606 | From: Discovery Bay, California | Registered: Apr 2006
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white1990stang
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Member # 2307
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posted
Ok ive decided to go n/a. How much compression can i run on pump gas considering its all tuned right? Dan what way will the bigger bore benefit me? This lower end stuff is new to me. Its definately gonna be a stroker but not sure how big yet. I'd prefer it to be a top end motor. like it to rev to at least 7k
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You must be fast, cause I was haullin ass when I passed you.
Posts: 1308 | From: martinez | Registered: Jan 2003
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Fostang
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Member # 3752
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posted
It all depends what you want out of the car and what your chassis can handle.
I know my fastback will be way over powered but I wanted that wow factor an don't plan on dragging it and to street drive it I have big enough waste gates to control the boost down low and make an eassssssy 700 rwhp.
The dart block I got was a sportsman with a 4" bore that way you get way more life out of the block quick can be bored up to 4.185. It's ready for roller cam with no work.
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67' Fastback TT 408
67' Camaro Lsx
64' Corvette Fuelie
57' Chevy Bel Air Lsx
68’ Pony Convertible
66’ Pony Coupe
Posts: 3011 | From: Stockton/Danville | Registered: Nov 2003
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Fostang
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Member # 3752
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posted
Smaller bore pistons are easier to find if you find a stroker kit and to rev to 7 k I'd do with a tight lash solid roller. Oh and don't skimp out on lifters to survive on the street your gonna have to spend about 500-700 on lifters about 400 on steel rocker arms about 400 on a customs solid cam and about 250 on springs to match then don't forget some 3/8 pushrods
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67' Fastback TT 408
67' Camaro Lsx
64' Corvette Fuelie
57' Chevy Bel Air Lsx
68’ Pony Convertible
66’ Pony Coupe
Posts: 3011 | From: Stockton/Danville | Registered: Nov 2003
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