[powersrj]

Thinking of getting the new 302 Boss block and building out from there. I would like to discuss some things about this build so that i dont make any mistakes. Since i came from 4 banger hondas i will need alot of help. First off what are some great websites for buying internals or any other performance parts. I have heard that the new 302 boss can hold up to 363 cid ..does that mean stroked or bored out as well? And last but not least if I buy a stroker kit whats the best one for a turbo application and do i have to go through machining and balancing if i buy a kit? I appreciate all the info guys thatnk you.

[1slo5.0]

How much horsepower are you looking to make? If you aren't planning on more than 500hp then a production block is all you need which will save you a ton of money. The Boss block can go to 374+ cubic inches. A factory roller block can go 347 safely and earlier blocks can go 362. If you are looking to make over 500 horsepower I'd invest in a Dart or World block because they can be bored to 4.200 safely and I know they can handle 2000+ horsepower. The cost is about the same.

[powersrj]

Well i was looking for aroung 700 hp and the new boss 302 has a 4.125 bore and says on the web sight that its has a 363 cid. Does that mean with out boring it out? And a tech guy said this block handles 1200 hp...This is the brand new block they just made semi-recently

[1slo5.0]

Originally Posted by powersrj Well i was looking for aroung 700 hp and the new boss 302 has a 4.125 bore and says on the web sight that its has a 363 cid. Does that mean with out boring it out? And a tech guy said this block handles 1200 hp...This is the brand new block they just made semi-recently

I'm familiar with the block. It can go bigger than 363. It will go 374 (4.125 x 3.500) and maybe even bigger than that. I'd still get a Dart or World block because they are better and cost about the same.

[TT86]

Originally Posted by Darrell Originally Posted by powersrj Well i was looking for aroung 700 hp and the new boss 302 has a 4.125 bore and says on the web sight that its has a 363 cid. Does that mean with out boring it out? And a tech guy said this block handles 1200 hp...This is the brand new block they just made semi-recently I'm familiar with the block. It can go bigger than 363. It will go 374 (4.125 x 3.500) and maybe even bigger than that. I'd still get a Dart or World block because they are better and cost about the same.

X 2 DART! ! !

[powersrj]

Does this dart block have the same displacement capabilities? Also what kind of stroker kit should i get if i am looking for a boosted applications in the 700hp range.

[1slo5.0]

Originally Posted by powersrj Does this dart block have the same displacement capabilities? Also what kind of stroker kit should i get if i am looking for a boosted applications in the 700hp range.

Dart and World blocks can go to 388 cubic inches. You will need a good forged crank, a good set of rods and forged pistons. My recomendation would be a Scat 4340 crank, Scat rods and JE or CP pistons.

[Justincredible]

World ManOWar for the win.

+ 1 on what Darrell said too.

[powersrj]

Ok sounds good. Now does those internals require machining or any work at all or can i Literally throw them in there with no balance or machine work?

[Stangzilla]

No I think if you get a stroker kit the block might have to be machined for the crank. I dont know about a Dart block but I believe a stock block does.

[powersrj]

What about the crank and rods? Do those need balanced or machined at all. And how many ci can i get without borring it out and just stroking it.

[1slo5.0]

You can never just throw parts in without machining. A good shop will balance the rotating assembly as well.

[Stangzilla]

Well i have a 347cid and it is bored .30 over and then stroked. If you bore a block .30 over that gives you a 306cid. The rest is obtained by stroking. I already told you the block has to be machined for the clearance of a stroker. When you buy a stroker kit it comes with the pistons for a 347 so you have to get it bored .30 over. Why would you not want to get it bored anyway? As far as balancing goes that is not needed. Balancing Is not needed but it is a good thing as long as you know for sure it has been done. In my opinion unless you really know the people in the machine shop that you deal with you will never know if the actual balancing has been done unless you are assembling the rotating assy yourself and know what to look for, or if you buy a crate motor from a reputable company and balancing is included or extra or whatever.

[Stangzilla]

Originally Posted by Darrell You can never just throw parts in without machining. A good shop will balance the rotating assembly as well.

Yes that is true mostly, but I know you Darrell have a great relationship with the people you deal with but where I come from a good machine shop is hard to come by thats why I went with the full crate motor from Coast High Performance. I trust very few when it comes to stuff like that.

[powersrj]

Yeah I didnt relieze 347 strokers came with pistons that required to be bored. When working with other motors stroker kits didnt require boring out cylinder walls. The only reason i didnt want to bore over is cause i would have to spend money on maching and buying to sleeves i would imagine. But again i dont know thats why im asking you guys ya know. How much am i looking at when doing a bore over at a machine shop including new sleeves if in fact i need them? Or is that just for aluminum blocks?

[Stangzilla]

As far as I know all stroker kits require bores. I know 347's do for sure. What r u talkin about?.... You do not need sleeves to bore .30 over. You say you have worked with stroker kits and you are talkin about sleeves for a .30 over bore!? What motors are you talkin about??????!!!!

[1slo5.0]

You only need a sleeve if you have a damaged cylinder. Bore the block! Why tear it down just to put standard pistons in it? Bore it so you can clean up the cylinders and have proper clearances and ring seal. Do it right the first time.

[Stangzilla]

Said that too!!!

[powersrj]

I use to work on honda motors. Had a 475 hp integra. Those come with sleeves stock...You buy stroker kits that dont require boring at all. If you bore it out than you have to get new sleeves, which stronger and more expensive sleeves are recommended. So knowing thats where i came from you can see my line of questions haha. Also know balancing is required because inline 4s create a counter balancing effect on the 1 and 3 rods and the 2 and 4 rods. So this is all new math and thinking for me. So iron blocks dont even come with sleeves im assuming is what you both were saying. But i got confused when it was said that "some can go to 375 (4.125 x 3.5)...I had thought that 4.125 was the stock bore and to get any were near 375 ci you would have to go more towards 4.20? Sorry im asking alot but i really appreciate all the help.

[Tony_90fox]

Originally Posted by Stangzilla Said that too!!!

You said i post too much?!?!?!?!?!