Lawnboy

iTrader: (54)

Hi
i have a new set of Eagle 6.125 ESP H-beam rods for my 346 Blown build up .

Using the stock LS1 Crank and diamond -8.6cc pistons, And D1-sc Procharger on my 01 M6 SS.

OK i keep hearing something about changing the Rod cap screws that came with the Eagle rods.

I think the # on the screw is something like 4070 ?? not sure i forgot.

but anyway why change the screws, are the L-19's stronger ,
how much are they and why didnt Eagle supply them?

thanks for your help

JPH

iTrader: (2)

L-19 are the strongest, way to much for your set up. the bolts in those rods are either #8740 good to 750hp, or #2000 which are good to 1200hp.

Lawnboy

iTrader: (54)

how strong are the L-19's ?

who sells them and how much are they,
My car is suspose to make 700-750 HP
please let me know

JPH

iTrader: (2)

arp2000 are strong enough for you, if you buy new bolts, the rods will have to be resized. L-19 are nhra top fuel level, i don't think you are there yet in the hp department.

DONAIMIAN

iTrader: (18)

Thoes bolts are for motors that are torn down and inspected regularly, wayy overkill for anything most of us can put one of these motor through.

Tony Mamo @ AFR

iTrader: (13)

Plus your rods were honed perfectly round with the distortion and "stress" forces created from the original bolts the manufacturer provided you (which as others have mentioned are more than adequate). Technically, the L19 bolts with their different TQ values could cause the rods to become slightly out of round potentially creating another issue with bearing clearance.

The regular Eagle bolts are fine unless you plan on turning 8500 RPMs....and at that point a premium rod should have been in the budget anyway. Rod bolts are more sensitive to RPM than power output....a higher HP motor just puts additional compressive forces on the rod....RPM is what taxes a rod bolt.

Tony M.

Lawnboy

iTrader: (54)

Thank you , for your help
My Eagle ESP rods have the 8740 ARP rod bolts

How are these,
I will defently be making around 700 HP to the wheels,
but only taking her to 6,500- 6,800 RPM max
what you think?

JPH

iTrader: (2)

your good.

Tony Mamo @ AFR

iTrader: (13)

I ran an 850 HP 7000 RPM BBC street engine (pump gas) with the same 8740 rod bolts....never had an issue and I know of a lot of other similar engines that didn't as well. If your going to worry, worry about and spend the time sizing all your bearing clearances properly and the other detail related time consuming aspects of the engine build.

You should be fine with the connecting rods...

Tony

JPH

iTrader: (2)

your good to go on the #8740 bolts is what i should have said.

Lawnboy

iTrader: (54)

Thanks guys