87silverbullet

iTrader: (11)

I am trying to find out what is the max bore and stroke I could go with in any one of these blocks. I know with the sleeves in the aluminum ls2 and ls3 blocks theres not much boring that can be done. Just trying to see about the biggest cubes that can be made without going to a c5r or lsx block.

1lejohn

iTrader: (9)

A friend of mine is going with a 445CID L-92 block which is a LS3 in the cars. Give a shout out to TXCAMSS on here it's their engine, it's being built by HKE.

Randy WS6

iTrader: (69)

I have a LS2 aluminum block bore .030" over (4.030") with a 250 shot and been running for three years now ,with no problems at all.

Gen414

iTrader: (38)

Go to remeber that just because you CAN put alot of stoke in the block, does not necessarily mean you SHOULD. After playing around with deck height, stroke, rod length and coming up with such a small piston and no compression height, I stuck with a 4". I wanted to build a 427" SOOOOOOO bad out of my 6.0 block, but common sense prevailed. Since i wanted to spray the motor, there was no way I was going to go to a shorter compression height than what my 6.125 and 4" crank were going to provide. Mine comes out to 1.115 with that combo.
A 4.250 with a shorter 6.100 comes out to 1.015 or .99 with a 6.125 rod
4.100 crank is 1.065 and 1.09 with a 6.100 and 6.125 rod.

So, while it will fit you need to look at things like that. Most engine builders will tell you (or piston companies) that when you start getting that short, your are asking for trouble. Again, it CAN be done, but SHOULD it, is the question

1lejohn

iTrader: (9)

I agree that's why I'm sticking to a 414 with a 4.0 stroke, but I will spray the car. The 445 is using some custom pistons that should work well. It will be a max effort hyd. roller NA motor. I give them credit for trying something different. Erik Konenig seems to build some of the best gen 3 and 4 motors out there.

Randy WS6

iTrader: (69)

I run a 4.100" stroke crank , 6.125" rods , 4.030" bore = 418cid.

racer7088

Yeah it all depends on the stroke and CH and cylinder length and what you want out of the engine. We have 3.250 stroke stuff here right now and 4.375 stroke stuff here right now!

Thanks for the nice words 1lejohn and Jame's car should run even faster with this new one but you are right it is NA only! NO NOS on that one.

99blancoSS

iTrader: (115)

You also want to think about piston costs shelf vs custom

suicidal racing

iTrader: (14)

Never mind

87silverbullet

iTrader: (11)

Bringing this one back from the dead.

Can an ls2 block be bored past 4.030?

FlamingTA

iTrader: (8)

I guess it depends on how much dependability you want. The most I have seen them bore out the ls2 is .030" which still makes the sleeves thicker then the ls1 from what I hear. I'm having a 421 built right now at ERL, 4.03" bore 4.125" stroke. They are using Wiseco pistons, seems they have got the skirt and ring design down for long stroke LS based engines.

racer7088

We have a few blower engine out there on LS2 blocks and they are doing alright but wouldn't start there initially.

mikesanto70

Was your 4L80-E install easy or a pain, what did you have to do to make it work? Driveshaft, mount, computer... etc....?
Thanks, MS

Randy WS6

iTrader: (69)

The 4l80 was not to bad, but i did a lot of research on here that help me a lot , so i would not have a lot of surprises. You will need a TH400 yoke, I used my stock length drive shaft, BMR 4l80 conversion cross member for the f-body, You will need a mid length aftermarket torque arm because there is no place to put the factor torque arm mount on the tranny. you will need to work on the driver side tunnel cross over support for the wiring harness that come out of the tranny , you will need to cut the ears off the tranny bellhousing to clear the header and starter if your tranny has them like mine did. also a flywheel for the 4l80 with the spacer for the converter support. A aftermarket dipstick , I don't use the computer to control my tranny , i have the FMVB and love it. For the speedometer i used the rear speed sensor and used EFI-Live to program the computer to calibrate it.
I fined more about this go to the Tranny section and search 4l80 thats what i did and found out about every thing to change over.

allblowdup

I am up at a 429 ci 4.070 bore x 4.125 stroke in a ls3 block. Seems fine so far but I am not spraying it nor reving it past 6000 rpm. I did get a chance to talk to one of the piston designers at Wiseco and told me that they have it all worked out and I should n't have any isues.

Randy WS6

iTrader: (69)

I just got done putting together my new LS3 431cid. 4.090" bore 4.100" stroke. Ross Pistons made me a custom set of pistons for the engine and there not cheep nether.heres a few pics of my pistons

http://i6.photobucket.com/albums/y21...cture003-1.jpg

http://i6.photobucket.com/albums/y21...cture002-1.jpg

http://i6.photobucket.com/albums/y21...cture004-1.jpg

xdanny510x

Looking into a Lq9 414.. How much spray yall think i can shoot ? 100?200 shot?