View Poll Results: What Block????
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What Block to go with?????
Originally Posted by CONVERTED
Ding Ding Ding.. makes most sense... already done... cheap... holds lots of power... stroked and done... either way you will need to pistons no matter what you do.. so the cost to sleve/and new pistons i'm sure will out weigh the cost of stroking... a stroked 427 is still a 427... one is cheaper, heavier & can handle more power.. no heavier isn't a good thing but you win some you loose some.
yea the iron blocks hold A LOT of power. i wouldn't do a resleeved aluminum block.
Originally Posted by imslow
thanks for making me look like i know what i'm talking about
yea the iron blocks hold A LOT of power. i wouldn't do a resleeved aluminum block.
yea the iron blocks hold A LOT of power. i wouldn't do a resleeved aluminum block.
You can buy and LS1 with the new darton sleves on ebay right now for 3200 plus shipping.. bore is like 4.1ish.. or you can buy an LS2 bare for like $1000ish and an Iron even cheaper... I guess their is some huge added bene of using an LS1 instead of an LS2...
After I learned what was involved with increasing the bore on the Alum. blocks and the cost... I then decided it wasn't for me but it might be for someone else who thinks their is something magical about that particual block.
well everyone wants to stay lightweight. a big inch all aluminum small block is MIGHTY appealing. god knows i'd kill for a c5-r or an ls-7... but i'm christian and follow the "thou shalt not kill" ...having said that, i don't have the resources for the big aluminum blocks. iron blocks are the way for me.
you can get a 427 stroked Iron block... but i'm not aware of 427 bored out iron.. As far as I know the only 427s are the C5r and LS7
as for lighter weight... Oh yes I agree... If I could shave 100lbs off my car without loosing my interior or anything else just by having my block made of a lighter material that would be great... but if I can make as much if not more power for alot less I'll stick with my iron...
as for lighter weight... Oh yes I agree... If I could shave 100lbs off my car without loosing my interior or anything else just by having my block made of a lighter material that would be great... but if I can make as much if not more power for alot less I'll stick with my iron...
Thread Starter
TECH Enthusiast
Joined: Apr 2005
Posts: 696
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From: Middletown, DE
What Block to go with????? Im undecided with what block i should build up, my camaro just crossed the 80 thou mark on the clock so im starting to thin about it.
I want either a LS2, 6.0 Cast iron, Or the 408 block.
Whats the best choice to go with, i plan on giving it twin turbos.....
I will take other suggestions on motors, Or a good way to set it up for the turbos.
I want either a LS2, 6.0 Cast iron, Or the 408 block.
Whats the best choice to go with, i plan on giving it twin turbos.....
I will take other suggestions on motors, Or a good way to set it up for the turbos.
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TECH Resident
Joined: Oct 2004
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From: TAMPA by way of MIAMI!!!
Everything I've ever heard sez if you are gonna go boost the iron block is the way to go much tougher if you are gonna boost the crap moutta it the extra 60 lbs will be negligable.
Originally Posted by firefighter
Everything I've ever heard sez if you are gonna go boost the iron block is the way to go much tougher if you are gonna boost the crap moutta it the extra 60 lbs will be negligable.
I would definitely go with the aluminum ls2 stroked to 402 or bigger.
And fwiw, the iron block and ls2 are both 6.0 liters, although there are small differences in cooling passages and other small details they are similar. just that one is aluminum and the other is iron.
Nate
Where will this car see duty? If this is your street car how often is max boost really going to be thrown at it? But I would agree with investing in the best possible tune you have available to you and to cut no corners in this area. If you don't have the resources to do the tune correctly then you're going to have short-lived fun.
like i said........ you can get an iron block out to 427... but it's not going to be the 4.125 bore and 4 inch stroke like the ls-7/c5-r. it will be bored .060 over w/ a 4.125" crank. that's 427 cubes. if that's what you want to do i don't recomend boosting it becuase the cylinder walls start getting thin at .060 over. i've heard of a few boosed .060 over blocks cracking. another thing to think about when boosting it is the rotational mass/weight of the big stroker cranks. if you want to boost it on a budget... you can use an iron block w/ forged internals and a stock crank. SPEEDINC, one of the sponsors, uses a .030 over iron block, stock crank and a single t88 turbo to make nearly 1000 r.w.h.p. they have their t76 kits being used with similar motors, even forged 348 stock alum block motors. they're getting HUGE power out of these combo's with relatively small cams, and relatively small boost with near stock cubic inch motors. they have so far been pretty reliable. give them a call. i think using a stock crank w/ an iron block with a little boost is a very cost effective way of making sick power. just a thought. it seems like you really want to be able to say that you have a 427 though.
Thread Starter
TECH Enthusiast
Joined: Apr 2005
Posts: 696
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From: Middletown, DE
I would like a 427 if i go n/a, but im thinking twin turbo, so if i were to go tt i should get a 6.0 iron block with a 4" crank, but dont bore it? or if i can bore it, how far before its in danger of cracking.
i'd just stick with the stock bore... that's the cheapest way to go... you're only going to get 6 more cubic inches out of the motor by boring it .030 over (which i wouldn't do much more than that for a boosted motor). so i don't think it's really worth the money to get the block machined for just 6 more cubes. yea you can throw a 4" crank in it and have it be a 402, or if you have it bored .030 over it will be a 408. you can get many quality 402 shortblocks already assembled from one of our vendors. SPEED INC. TSP, SLP, MTI, and a bunch of others have either high compression n/a shortblocks, or low compression FI shortblocks. i would go that route...........
10 Second Club
Joined: Aug 2004
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From: Houston
Originally Posted by THE_SUPRA
what knid of power do the ls2 blocks support? is it possable to make 1000+ whp on an ls2 block?
, so yes it's possible.. 
6.0L Block bored .060 over with a 4.125" crank = 427ci not 447ci.
Basically you have two options if you want a 427ci motor. Resleeved LS1/2/6 block to 4.125" bore and a 4" stroke crank, which is what I am doing. Or a 6.0L iron block bored .060 over with a 4.125" stroke crank. If I'm not mistaken, boring a 6.0L iron block .060 weakens it enough to where it should not be trusted with high amounts of boost or spray.
Are you wanting N/A or boost or spray?
Basically you have two options if you want a 427ci motor. Resleeved LS1/2/6 block to 4.125" bore and a 4" stroke crank, which is what I am doing. Or a 6.0L iron block bored .060 over with a 4.125" stroke crank. If I'm not mistaken, boring a 6.0L iron block .060 weakens it enough to where it should not be trusted with high amounts of boost or spray.
Are you wanting N/A or boost or spray?