Superman09

iTrader: (65)

So I have been thinking about which shortblock to build for my car. I already have the tranny narrowed down so thats all set. Next is the engine... The car is a Street car, track for fun. It has twin turbos, they are Garrett T3's with stage 3 exhaust housings on .48 AR's, comp housings are .60. So i cant go much bigger for displacement without the need to upgrade turbine housings at the minimum. I have been thinking of just building my 346 all forged, also thought of building a 370 iron for added strength and some more cubes, also the same but in alum so the stock stroke ls2. Then i was also thinking about adding some stroke, but dont know if its really even needed. I am lost. Too many options, and i dont know enough about each. So throw your opinions out there with some reasons as to what i should build for shortblock to suit my needs. Thanks!

WestSide

iTrader: (6)

Honestly, I'd suggest forging your current motor, or buy a cheap used motor and forge it over the coming months while you're getting the tranny and setup dialed in!

98turbls1

iTrader: (17)

There's plenty of fellas on a stock cubed engine running quick.. that's what I would do...

52172

iTrader: (2)

yea stick with 347 cubes since you will get the best results with those cubes and anything more will only cost money which you could use for other parts of the build.

Superman09

iTrader: (65)

At what point power wise, does the iron vs alum factor come into play as in head lifting instances, etc?

ddnspider

iTrader: (26)

waaaaay more than the rest of your setup will support.ie 900rwhp or higher for most of them.stevieturbo was lifting heads with a little less hp i believe.honestly id buy a forged 347 shortblock and sell the motor in your car now to recoup some cash

Superman09

iTrader: (65)

a 370 iron would basically just be a few more cubes and more weight, not really worth it. 370 alum ls2's are a lot more pricey, but would it be worth it to get a stock stroke forged ls2 over the 346? Or would it not be worth it? Would stroke help me at all, like maybe build my 346 into a 383?

Websy21

iTrader: (34)

I too am thinking the exact same and really don't know much. The way I saw it though was build the current motor before you blow it or get another one and pick away at it. I think that it would cost way more to build a stroker or go with a bigger block. It would sure be cool to have a blown 383 or 402, but really, come on here do you need it? I think with that sweet set up you have, a forged 346 with some nice heads would do wonders with a twist of a ****! You could make more boost with the smaller motor on your current set up to, if you want more cubes just get some 6.0 heads. I think this is what I am going to do! Run low boost while I build a motor so I can still drive it, instead of stare at it in the garage because I can't afford a motor!

JAvenger007

iTrader: (9)

stock 346 IMO for the win.

cheap and proven to make power. plus those twins won't fare as well on big cubes. You can make 800+ on pump gas. Just get rods, rings, and pistons and leave the stock crank alone. While its out get a set of 6.0L heads and have them ported. Should only add about $400 to the total or just build the motor for lower compression to cut extra costs.

Websy21

iTrader: (34)

Yes definetly a forged 346 is what I'm gonna do. Getting another block while driving the car or ripping it apart in the winter. Off the top off your head guys, how much do you think It would cost to build a forged 346, bored, etc. Minus heads/intake, etc. This is something I have never done and don't know much about? I have just recently started to look into it, but honestly don't know where to begin? Thanks, not Hijacking Superman, just thought this could maybe help you too??? Or maybe you could help me

cablebandit

iTrader: (37)

you need to think long and hard about ultimate goals...what turbo you are going to end up with etc..... % of street vs track

30th t/a

iTrader: (51)

buy a set of forged pistons, eagle rods, keep your stock crank but get it checked out and have someone that knows what their doing put the shortblock together. save alot of money and now your set for big boost.

nossty1

iTrader: (3)

I am going to say iron 408 with a umi kmember and move the batt to the back. When I did this I think I only added about 30 lbs to the front. I could hardly even tell its there. With a 408 you will be able to make more power on pump gas. But then again I dont know how much power you want.

Superman09

iTrader: (65)

Well my Ultimate goals with the car is a sick street car that no one even wants to mess with and i can run a solid 10 all day on my 18" DR's. I'm not looking for necessarily the cheapest route here, i'm looking for which set up would ultimately make my car the best for what i want. I guess there are a few questions, Do i need stroke? Aluminum would probably be best, would an ls2 be superior? The way i'm looking at it, no matter what i'm probably going to have to upgrade the turbos, so whatever shortblock i decide on, i will match the twins to it. This is a tough decision, everyday i change my mind... alum vs iron, stock stroke vs 4", ls1 vs ls2. ahhh

nossty1

iTrader: (3)

Then why not a alum 402 with a 9.0 Cr or so, that way you still have a bit better bottom end for fun on the street. You would barly have to push it to get the power you want. This setup would be a bit overkill but you would be able to make more on pump gas. No you dont have to have stroke, but it is nice to have.

cablebandit

iTrader: (37)

i agree

Superman09

iTrader: (65)

So for a street car, you guys think maybe stroke and bigger cubes would be best so i dont have to push the motor as much with a ton of boost to get power, therefore more reliable?

52172

iTrader: (2)

yes sounds like the plan to me

cablebandit

iTrader: (37)

what you said plus bigger turbos will spool faster with bigger cubes. I love the 408 for daily driving.

Superman09

iTrader: (65)

Now will larger cubes restrict me more as far as pump gas? I do not want to run race gas.... I will run 93 plus meth, i already have meth set up on the car.... More cubes + bigger turbos on less boost seems to be the most reliable, since it wont push the motor as much... keep the input flowing..