418ci

4.080x4.000
BME pistons 13.0:1
Cola 4340 gun drilled crank
.670I-.650E solid roller
Ported Ls6 heads with TD shaft mount rockers
Big Shot of Nitrous

What do you guys think would be the best and strongest 6.175" Rod.Looking for something light and durable I'm not sure what I want. Just want to see what everyone else is running.

Ben R

That's a long rod. Carillo makes a nice piece. The Lunati Pro-Billet piece is nice as well.

SLED28

iTrader: (7)

6.175 or 6.125??

418ci

6.175, thanks for the imput I think I'm gonna go with a set of carillo's. I didn't find a listing for Ls1 rods so I called them, $195 each ultra light A-beam rods. They said there good for 1200-1400hp. I'm still gonna shop arould alittle.

SpeedDemon

Why are you going with a rod that length? That just seems a little odd. I am just looking for a reason as to not go with a more conventional setup like a 6.125" rod. If you do that, Lunati Pro Billet lights make an LS1 specific rod for this. They are a little cheaper at $949.95 for the set as well.

Just an option. The pistons are going to be custom anyway, so you can choose whatever rod you want....unless you already had them made...

nitrorocket

iTrader: (12)

CARRILO, CROWER, AND OLIVER are the best. I personnaly went with the standard crower billets. They also sell ultralite rods. You can pick up those or olivers for about $1200 for 8.

Ben R

Why would you want to use a 6.175" rod?

418ci

I have a buddy that works at BME,I got speical price on the "ProtowType" Ls1 13.0:1 pistons. I was told that 6.175 rod was the rod to use. If anyone has any better suggestions please let me Know.

Ben R

Use a shorter rod and a piston with a taller compression height. A nitrous motor will thank you.

LOnSLO

iTrader: (15)

You'll definitely need a set of custom rods. That's an odd size. Your pistons should be the last item you order since they need to be custom.

goober35

iTrader: (1)

Sence you have the pistons bust out the spec sheet. It i will tell you what rod to use with these pistosn. Also if you run a rod that is to long the motor will new turn over and if it does you will distory the motor in a matter of secounds. You should have bought the rods pistons and crank at once so you dont run in to this problem. What are the specs on the pistons. Did you have the wrist pin moved up closer to the oil rings??. If you did you are going to have to sit down and figure out what the clearances are. Then you have to apliy them and do the math to find out what rods you need. Or call TR or TSP or any major company like that and ask. I think you have made a big mistake on what you have bought. Hope your buddy got you ls1 pistons and not SBC.

Ben R

Did you miss the part where he said he was going to spray a big shot on this motor?

418ci

Ya there Ls1 piston, thanks for info kingcrapbox I will look into it.

goober35

iTrader: (1)

Nope sure did not. This is not my point. Need to know the specs of the pistons and if they are ls1 or SBC. 13:1 CR is not good for any power adder.

LOnSLO

iTrader: (15)

Except for nitrous

Ben R

Except for nitrous.

goober35

iTrader: (1)

On a pure race set up then you can do it not the best. With any power adder you want less CR let the power adder nitrous or boost do the work not the motor. You can make more power this way and the motor will last longer. Now if he is going to trailor this car to the track and just race it then yaa go to town on the CR hell up it to 15:1. But it will not last long.

LOnSLO

iTrader: (15)

Not to argue, but what school of thought is that? Actually it is the best race setup. 16:1 works best on huge cubic inch motors, as well as small. You need tons of compression, not for the nitrous, but for the giant cam you will be running to make any cylinder pressure. Put it this way. I run a very large cam. I have over 13:1 static compression setup. My dynamic compression is somewhere around 11:1. Get my point?

Ben R

That's right, go ahead and build an 8:1 motor and spray it. I'll build an 11.5:1 and go faster.

SpeedDemon

Gotta go with KingCrapBox here. Nitrous is really not that compression sensitive. It is nothing like FI.

For nitrous, you definitly want to bring the top ring down as far as you can. The shorter rod will allow you to do this. If you can, I would go with the shorter rod.

Good luck,