About to help a friend build off his stock 302 93 block. He wants to either build a 306 or 331 for a street use, not daily driven car. Looking to hopefully have close to 400 hp, maybe more if possible. As far as cost in relation to hp gains, which would be better to build. Wanting a reliable, natural aspirated, maybe run nitrous engine. Can you all help me on the pros and cons of this build and what parts it is going to take to make either setup reach the 400 hp range. Is it possible for less money to build this engine from a 306? Please list all parts he is going to have to look into buying to reach this goal. Thanks for any help.
306 or 331
- Thread starter Fox_84
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if you are ordering a whole new rotating assembly then go with the 331....why not get the extra cubes. The only thing your going to have to pay more for the machining costs on the 331 because you have to notch the cylinder skirts in order for the rod bolts/studs to clear
88Stang331
New Member
- Mar 30, 2006
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Never heard anybody complain about how hard it is to make power with more cubes. I'd say go with the 331.
blackened88lx
Active Member
I never really saw the point in stroking a stock block unless you never want more than 400rwhp. The extra money for the stroker kit then machining doesn't make sense when a stock block is a ticking time bomb above 400rwhp. All that money could go out the window in a second when you split the block. I say just run a 302 or bore it to 306 if you have to. Run a good h/c/i combo which will normally get you around 300rwhp, then spray it with a 100shot.
306 with H/C/I and 75 shot will get u around 400rwhp. kinda hard to get 400 out of a stock block N/A 306.
there is a couple 331 kit and stuff on ebay
http://cgi.ebay.com/ebaymotors/302-...001QQitemZ110080679884QQrdZ1QQsspagenameZWDVW
http://cgi.ebay.com/ebaymotors/5-0-...020QQitemZ300074012643QQrdZ1QQsspagenameZWDVW
http://cgi.ebay.com/ebaymotors/331-...005QQitemZ150084608537QQrdZ1QQsspagenameZWDVW
http://cgi.ebay.com/ebaymotors/BUDG...008QQitemZ180078225395QQrdZ1QQsspagenameZWDVW
i dont know how good those kits are tho. but if i was him i would do the 306
there is a couple 331 kit and stuff on ebay
http://cgi.ebay.com/ebaymotors/302-...001QQitemZ110080679884QQrdZ1QQsspagenameZWDVW
http://cgi.ebay.com/ebaymotors/5-0-...020QQitemZ300074012643QQrdZ1QQsspagenameZWDVW
http://cgi.ebay.com/ebaymotors/331-...005QQitemZ150084608537QQrdZ1QQsspagenameZWDVW
http://cgi.ebay.com/ebaymotors/BUDG...008QQitemZ180078225395QQrdZ1QQsspagenameZWDVW
i dont know how good those kits are tho. but if i was him i would do the 306
Woodrow
Founding Member
blackened88lx
Active Member
And waste all your money on a stock block that will soon split in two and wipe out your new stroker kit?
if you want to stay na....its easier to get 400rwhp out of a 331 than a 306....and 400rwhp is not in block splitting territory
millhouse
Founding Member
It's really not that far off….and stock blocks have split with less.
If he plans on never pushing it any higher…then there is no reason worry. If however he is like the majority of us and get a bit complacent with the higher h/p levels…he'll be stuck between a rock and a hard place.
millhouse
Founding Member
my block hasnt split .....yet! 331 with tw heads and stage 3 cam on a 150 shot
Nor has mine (see sig for combo).
That's not to say however that we are not living on the edge.
Nor has mine (see sig for combo).
That's not to say however that we are not living on the edge.
agreed
....does anyone wanna donate me a new boss block or dart?Similar threads
