Well I think its about time i made my first post after months of browsing the forums so here goes.. been doin a lot of reading lately about internals for my b16 as i plan to go sleeved and boosted over the winter, and i see that brian crower uses the arp 625+ bolts on their H beam rods and rate them at 300 horsepower per rod. So did anyone ever try these bolts with eagle rods? wouldn't this basically make them comparable to the BC 625+ rods since the regular BC h beams use 3/8 bolts like the eagles? Not trying to start a big debate or anything just curious to see how far the eagles can be pushed cause its always nice to save a few bucks if possible

 

I haven't used eagle rods but I've used the rather expensive arp 625 bolts. Rod bolt strength needs to go up in relationship with rpm more so then just hp, boosted or not. The more normal arp 2000 or even the standard arp rod 8740 bolts are both very strong and durable, and fill the need for 90% of peoples' needs.
One other point that needs to be looked at is whether or not the rod itself can handle the proper torquing of a very high strength fastener. The bolt could be in essence too strong for the rod. An arp 2000 bolt might get torqued to 50 lbs/ft while a arp 625 of the same size will have to be torqued to 75 lbs/ft. And the rod may yield before proper preload is reached.
That leads to next thing that you have to look at. When you torque a bolt tighter you are going to have to re-hone/size the big end as it will distort more with the increased preload. In order to maintain proper bearing clearances.
I hope that helps.

 

I agree. I'm sure it's a great bolt, but a waste of money for most applications.

 

Yes very helpful, gives me a bit more confidence in purchasing the eagles when the time comes.. more opinions are welcome!

 

Why are you overlooking Eagles? There are tons of guys making 800+ with Eagle rods. Our team car made close to 800 WHP with Eagles(787 whp to be exact).

Why are you limiting yourself by sleeving a b16? You can find LS blocks floating around for dirt cheap. It will be more beneficial to start out with the b18's.

 

The eagles were pretty much the plan right from the start but after seeing a few threads about the crowers being great rods I was jus kinda tossin some ideas around. And as far as keeping the b16 block I just cant pry myself away from that rod stroke ratio after weeks of reading non stop i decided to just keep what i have.. I was offered an LS block for 50 bucks yesterday so i may pick that up incase i change my mind

 

i would definitely overlook the rod ratio aspect.. you can rev high on an ls crank provided you have quality parts.

 

Get the BC rods if you have the $$$. The top dog in my home town is pushing them around 1000hp. If your only making 650-700hp or less take the Eagles save some DoW...

 

bud this post is from 8/2010