ButchB

iTrader: (5)

Thanks guys

ckpitt55

iTrader: (4)

Depends on your starting deck height and if you're having the block decked or not. There's a .010" tolerance on deck height from the factory.

With compstar 6.125s and diamond 11502's I was out of the hole ~ .007" or so on my block. I had a min cleanup cut done on my deck surfaces.

Idahoctsv

Yea Your right I thought that lightweight rods were for people just looking to save weight. What exactly are lightweight rods for? I want to spin my engine at 7-8k as I'm building it for roll races and high speed runs.

Idahoctsv

So you had to shave your deck alittle? Is there an easy way to measure deck height?

ckpitt55

iTrader: (4)

I bought the engine as a dropout so figured it might be a good idea while while getting the other machining done. I had no maintenance history on the engine so wanted to make sure everything was flat to start with..

As far as deck height, it's pretty easy to back it out from your other measurements. You know your stroke, rod length, and compression height of your pistons. Put an indicator on the deck and zero it on the deck surface. Then carefully move the indicator to saddle the piston and move the piston to TDC, watching how much the indicator moves.

Your deck height will be 1/2 stroke + rod length + compression height + indicator reading.

gouldy

K1 rods are in your price range and they are billet according to their web page.

Idahoctsv

What's difference between billet and forged? Or same thing just different name?

dj94gt

iTrader: (1)

The K1's are a forged rod. Billets, are typically $1000 or more depending upon brand (Callies Ultra, Oliver I beams, Manley I beams, etc)

For what has been discussed in here, I would do a Compstar rod with Wiseco pistons, or diamond pistons.

JakeFusion

iTrader: (7)

The Compstars are 618g FWIW. The K1s are 660g. The K1 Lightweight Rod is 618. But it is not rated as high as the regular K1s or the Compstars.

In comparison, the factory 04+ floating pin rods are 640g.

RPM puts more stress on a rod than just about anything. RPM is a function of the valvetrain stability... so I would go with the strongest rod you could afford if you are seriously considering spinning it past 7500.

And you're going to need a different valvetrain setup that the typical shelf stuff you see here. Very lightweight valves, stout pushrods, short-travel lifters, endurance cam lobes (much less aggressive than the donkey dick cams you see here), and enough spring pressure to control the action at 7500+. To get to 8000, I'd switch to solid roller. You also need enough intake and head to support that at a given displacement. None of the plastic manifolds will do that outside of the LS7 on the LS7 heads.

Idahoctsv

So it looks like compstars or k1 rods. And let me guess all the stuff I need might have to be custom made and spendy right? For intake and heads what would be a good setup? If I didn't mention it will be forced induction as we'll.

dj94gt

iTrader: (1)

More often that not, the Compstar rods, and Diamond, or Wiseco pistons are on the shelf.

Idahoctsv

Ok great. But after looking at Oliver rods I'm changing my mind on rods. They have a very informative website and good details. Ill have to email them. What about the valves and springs and cam jakefusion was mentioning?

gouldy

K1 claim their H beam rods are billet and advertise them as such.

http://www.k1technologies.com/Portal...-Beam_Rods.pdf

fubar569

iTrader: (9)

If Wossner made rods for a LS1 application I wouldn't hesitate to try them. 24psi and 460whp in the Busa and they've got about another 250hp and/or 15psi to go before i'd consider being even slightly worried.

dj94gt

iTrader: (1)

Yeah, they do. Funny they visually do not look like a billet rod design. Second the $666.xx price reflects that inline with other forged h beams with ARP2000 bolts. If I'm wrong, I apologize about being misleading. One thing I know for sure, they are coming from china and machined in the USA. If I need a billet steel rod, I'll stick with Callie's, Oliver, crower, or dyers

itsslow98

iTrader: (18)

In reality most of the Hbeams are the same. They are made overseas and shipped to the US where they are finished. Any of the name brand Hbeams with arp2000s will get you close to 1000hp. Personally I would do the Callies rods in an LS with some Wiseco Pistons.

I just put Manley Hbeams in my cobra motor only because Callies doesnt make a rod for a 4.6.

cmac06

iTrader: (16)

If I were spinning that kind of RPM, I'd upgrade to an American made rod with Custom Age rod bolts to handle the extreme acceleration placed on the rod bolts (or at the very least better bolts). Assuming everything is setup properly, that appears to be your weakest link. You can get bolt upgrades on any of the Callies rods by calling them I know, and Oliver offers better bolts as well. Don't know about the others, but ordering with the better bolts avoids any rematch inning costs.

Idahoctsv

Ill email Callie's and ask if they can make a custom 6.098 rod cause they don't offer them on webpage.

Sales2@Texas-speed

iTrader: (5)

Nothing has to be custom made. You need a 6.125 rod and an aftermarket piston. Those are all shelf items.
Example:
https://texas-speed.com/p-730-wiseco...22-stroke.aspx
https://texas-speed.com/p-2686-k1-61...rod-bolts.aspx

dj94gt

iTrader: (1)

Can they make one, yes. Get your wallet ready