u can get a kit for around 2k but putting it all together is what cost alot of guys

 

true, but you use a 4.125" stroke, the long stroke limits the rpm range. even in our 427's we use a 4" stroke. I prefer an engine to be square as possible(bore and stroke the same) and much prefer the bore to be more than the stroke when not.

 

was the block also decked? how about align honing the mains? if a shop did all of that for $120.00.....
also does the shop know the LSX platform? things are different than the old school SBC stuff, not saying a good local shop can't do the machine work, just asking.

 

for 10K you are talking full long block, hell almost turn key. I can do a 408ci iron shortblock for $3899.99, 402ci slightly more.

 

215s would be fine, so would the 225 or 245 with that cam, it alldepends on your goals. Heads need to match cam, big cam+big heads as a "general" rule of thumb, however T-Rex cam be run on a stock LS1 head, look at the maker thunderracing the have run a best of 10.4 on a camshaft only LS1 meaning stock heads and internals, with full bolt ons. I personally would use a different camshaft but thats a mnatter of personal opinion.

Also 10K is way to much for a 402/408 that is race car motor or show car or just got ripped of motor for that much. for 10K you'd get a fully assembled alluminum long block, you can buy a alluminum short block for under 4k. Check with our sponsors, Ill be going with TSP

 

just wondering about how much would it cost to put this motor in and build it up.... and how much rwhp could i get??...for a DD would this 402 a 383 or just a cammed ls1 be best??

 

everyone is saying 10k is too much, but i dont think its unrealistic. you can get a 408 for 3800, that doesnt include cam, a 402 for around 4200, so you get that add a cam, timing set, lifters, everything adds up.

a nice set of etp 245's will run 3k, and valve train, everything all together, machine ork etc, youd easily be able to push 8k, so 10k from a really high priced hop wouldnt be out of the realm of reality.

hell a LS7 is 12k

 

For a daily driver just throw in a cam something with some ***** thats not too big like a 228 on 113LSA it will have great power and a good idle to scare people, with all the bolt ons there should be nothing stopping you from low 12's and easy 11's on juice.
As far as price goes for the 402 or the 383 it all depends, I think for a budget build you could probably get it done for around 5500, but dont hold me to that. If you arent mechanically inclined and say you dont have any parts to transfer over to the new motor (water pumps, headers, intake) its gonna run you up quite a bt. also you have to account in labor if you arent going to do it. Rwhp and Rwtq...who knows the sky is the limit. just get a cam and be done with it

 

That's a pretty good price for no assembly.

 

Well I'm looking at building my 346 till it goes to hell then I'll decide on a 383, 402 or 408. With a 402 or 408 shortblock, could I transfer all my LS1 accessories to them? I will most likely have ET 225 heads along with my TRex cam-would this combo be a good setup on a larger cube motor? If so, I would just assume swap it over. After that, what all is left to get?

What are the differences between the 402 and 408? I know ones an iron block and one's aluminum, but other than that, whats the benefit of one over the other?

 

I have a 395 stroker and it make 470 rwtq and never less the 350 rwtq. The 395 makes more torque on average than the 383 does.

 

What are the disadvantedges of having the stroke larger than the bore, and how does it limit the rpm range?

 

a 402 is a standard bore 6.0L block with a 4.00 inch stroke. 408 is a .030 over 6.0L with the four inch crank. Aluminium or iron make no difference in displacement.

TRex cam will be a little easier to live with with more cubic inches, as would large volume heads. Both of them are down on torque with just 346 cubes, but the longer stroke helps to counter that. If your engine is street bound, 225 heads should flow enough for a 408. Leave the 230 and larger heads for 427 and larger engines.

A larger stroke increases piston speed and acceleration at the same engine speed. This introduces more stress on the rods, rod bolts and crank at the same engine speed. A longer stroke also tends to move the power curve a bit lower for two reasons:
1) the longer arm gives more leverage on each power stroke, generating more
torque for the same event
2) all other things being equal, more stroke = more displacement = more air required. The same intake, cam, heads and exhaust may not support the increased demand.

The TRex may work ok with stock LS1 heads on a 346, but it will make more power with a better flowing head, and it will require a better flowing head to not lose power in a 408 cubic inch engine.

 

How many all stroke 395s have you read about that tore up due to high rpm or anything for that matter? I run the crap out of my all stroke 395 and on the street it is very fast. As a matter of fact I have been trying to break it so I can explain to my wife that I have to build another motor, so I can build a 441 or something. I have run it to 7k many times and it just keeps on ticking.
Texas Speed built it for me.

 

Well I plan on running ET 215 or 225 heads with the TRex on my 346. I think I may go with the 225's so when the 346 does take a dump I can just swap everything over.

Thanks for the info hammertime-you know your ****!

 

from what i gather, the 402 is all stroke??? and the 408 is bored with a different crank? also, a trex is a big high RPM cam for a stock LS1, so with a 402 or a 408 it would be more streetable? would i still have to rev it as high to get the power from it? what kind of powerband would i be looking at with a Trex and a 408 with lets say, ET 225s?

 

so what venders have a 383 kit thats not 4k ?

 

Who needs heads! Check out this 408 with UNTOUCHED STOCK LS1 HEADS!

 

The kits I sell are right at 1800.00-2000.00 depending on parts and we will balance for another 100-150 depending on parts.

 

Okay guys, i would love to stroke it to a 382/383, depending on who answers, but i am stock internals except for hardened pushrods, so will it handle it? Coudl i sneak a stroker kit in wih stock internals? If so, woud a cam and springs be okay later on?