BlackTA96

iTrader: (3)

Any disadvantages to a 408 over a 396? Or even a 396 over a 383?
Im thinking about stroking my LT1. Not what I want to stroke it to tho.
What would yall suggest?

95greenmaro

iTrader: (3)

396 is pushing the limits of a stock lt1 block. I went 383 with mine, for the just in case something happened I could still go out to 396

Racin96ss

iTrader: (3)

Wouldn't do 408. 396 would be fine along with 383. I am looking for something bigger than my current 355 down the line next year.

ss.slp.ls1

iTrader: (36)

Two important questions...
What are your hp goals? And more importantly, what is your budget?

Most of the time people shoot straight for a 408 or a 396 and run out of money before then can finish building it correctly. Majority of the time a well built 355 with a nice top end will outrun any big stroker they attempt to build.

If you are going for high hp and you have a decent budget, I would start off building a forged 383, pick up some AFR heads (have them ported if you've got the budget), ported intake, 58mm TB, a custom grind cam (your choice of a hydraulic or solid roller), 1.6 rr's, beefy springs, LT headers, etc. etc. Build it to take lots of RPMs and a dash of spray...Should be a monster!

BlackTA96

iTrader: (3)

Im wanting around 400 or so on motor. And then come in with a 200 shot or so...

Is 400 a reachable goal with my current mods? Not wanting to buy new heads. I am willing to get these ported tho.

ss.slp.ls1

iTrader: (36)

400 is more than attainable with a well built 350. I would get a top end package from Advanced Induction, I think you can get a nice one for just under $2k which will put you over 400rwhp. If you are going to be spraying a 200 shot or more, I would tear down the motor and build a forged 355, or if budget allows, a forged 383. Get ready to have a reliable 600rwhp motor.

96lt1m6

iTrader: (31)

400 hp is attainable with a stock shortblock so why spend 3gs on a stroker?
especially a 408Lt1 wafer thin cyl. daily driving will kill this set up in 6 months.

ss.slp.ls1

iTrader: (36)

Agreed, but he said he'll be spraying a 200 shot. I think that would be maxing out his shortblock.

96lt1m6

iTrader: (31)

https://ls1tech.com/forums/lt1-lt4-m...na-9s-n2o.html

i could have been more specific.
stock shortblock can hit the HP # OP is hunting for,with that said OP can at this time purchase a set of speedpro 2256s and some h-beam rods to withstand the 200 shot for under a 1000 or go a bit more and do a set of Mahle slugs w/ 6" h-beam rod and still save a bunch of cash that would need to go to the needed parts.

z28rob18

iTrader: (7)

i agree with them all a big dollar stroker isnt needed for your power goals. but some forged parts inside would be a good idea on a 200 shot. build a nice 355 and spray that bitches brains out!!

BlackTA96

iTrader: (3)

Yea. I definetly wasn't going to spray a 200 on a stock bottom end. So I'm either going with a forged 355 or a forged 383.

Now that thats out of the way...What about my current heads and cam? Do they need to be replaced? Is 400rwhp acheivable with ported edlebrock heads and a ported intake? Or do I need to scrap my head and cam and start fresh?

ss.slp.ls1

iTrader: (36)

Yes you can reach 400rwhp with a CC306 and ported heads...but you will need...do I have to say it again?

BlackTA96

iTrader: (3)

ha ha....longtubes...gotcha...lol.

z28rob18

iTrader: (7)

lmao ur sig says i need longtubes haha.

ss.slp.ls1

iTrader: (36)

LOL, I think he added that now, I've been bugging him for a while.

96lt1m6

iTrader: (31)

you will save a ton of time if you click the link in my previous post.
heads and cam are the heart and lungs of your motor..

BlackTA96

iTrader: (3)

Yup...added it just for you...lol


Those heads are going to cost me 2600 bucks. I dont' have stockers to give them as cores. And i dont' have that much money on hand.

96lt1m6

iTrader: (31)

Hmmm how were you gonna build one of those big cube motors?
no doubt you will need heads done, try an LE-2

your pocket generally dictates how fast you can go

joelster

A 396 is much more expensive to build than a 383. There are no cast cranks available, you have to run a forged crank. Forged cranks are $650 minimum. You want to spray a 200 shot so you'll want to run all forged components/minimum pistons. You say you don't have $2600 for heads/cam, so how are you going to afford a fully-forged internal set? They will run you at least $1500 irregardless of displacement, plus you have to figure at least $1000 for the machine work on the block, then $400 for 4-bolt caps, and that will leave you with stock heads and cam.

You won't be able to build an incredibly strong motor with top-shelf stuff on a meager budget. This hobby ain't cheap. If you are pinching pennies, I would get the stock crank polished, run the stock rods, and get a set of decent forged pistons along with a .030" bore/hone. Leave it a 2-bolt main for the time being. That will get you 355 with very tough pistons that can handle a 200 shot. Shop around for some cheap ported heads in the classifeds or go with a LE1 head setup which is under 1G, and get a good cam like an LE1/2 or AI 226ish.

BlackTA96

iTrader: (3)

It might cost a lot to stroke the motor, but I could buy the pieces seperatly. Save some money...get the crank. Save some more...get the rods and pistons. Didn't have to take a big hit all at once, like I would on those heads.

I might take ss.slp.ls1's advice and port my stockers. Then i'll get forged rods and pistons and make it a 355. Then spray it.