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-   -   I or H (http://www.njfboa.org/forums/showthread.php?t=39342)

LTb1ow 12-09-2008 09:06 PM

I or H
 
Which do you guys prefer? This would be for a 355 build. Maybe see some juice but nothing serious.

Tru2Chevy 12-09-2008 09:16 PM

As in I or H beam rods?

- Justin

1984camaroz28 12-09-2008 09:38 PM

i whould go with a set og Eagle H beams

JSPERFORMANCE 12-10-2008 07:02 AM

It really depends on how much power you plan on making and how fast you are going to spin it.

z28rob18 12-10-2008 10:33 AM

Quote:

Originally Posted by JSPERFORMANCE (Post 521425)
It really depends on how much power you plan on making and how fast you are going to spin it.

i agree because H beam rods will cost u more at the machine shop clearancing for them. and a set of forged I beam rods r strong unless ur plannin on sprayin lik 200+ or very often

Pampered-Z 12-10-2008 10:48 AM

There always been what seems like allot of debating over which is better and why? I think the majority of people run H beams as there is less clearance issues and cost.

My engine was built to support 750+ HP at 7,000+ RPMs, it has Manely I beam rods in it. ( they were not cheap! )

LTb1ow 12-10-2008 11:43 AM

Well its gonna be 355 build with stock crank, and new rods/pistons. I wanna feel safe spinning it past 6200 but prob not much higher. Perhaps some juice later on, which is why I want to go with forged stuff. So its a little past a budget build but not an all out build.

I was thinking Scat H rods.

z28rob18 12-10-2008 11:47 AM

if i were you id go I beam save yourself about $200 and they're still very strong and i think the crank would go b4 them. and 6200 isnt high at all.

WildBillyT 12-10-2008 11:50 AM

Quote:

Originally Posted by Pampered-Z (Post 521481)
There always been what seems like allot of debating over which is better and why? I think the majority of people run H beams as there is less clearance issues and cost.

My engine was built to support 750+ HP at 7,000+ RPMs, it has Manely I beam rods in it. ( they were not cheap! )

This was my understanding as well.

LTb1ow 12-10-2008 11:50 AM

Stock crank is seasoned, people have pushed it pretty far. And I wanna try to go overkill so I decide to upgrade later, I can use the same parts. And I know, 6200 isn't that much for a drag car, but where would you spin it that high on the road? And my cam peaks out around 6200-6300.

z28rob18 12-10-2008 12:21 PM

Quote:

Originally Posted by Shownomercy (Post 521503)
Stock crank is seasoned, people have pushed it pretty far. And I wanna try to go overkill so I decide to upgrade later, I can use the same parts. And I know, 6200 isn't that much for a drag car, but where would you spin it that high on the road? And my cam peaks out around 6200-6300.

i think u answered ur ? in this post you wanna go overkill so u can upgrade later then H beam is the way to go.

LTb1ow 12-10-2008 12:23 PM

Thats what I was curious about, H is considered the stronger of the two right?

z28rob18 12-10-2008 12:31 PM

yea definatly more beefy they're considered the stronger

LTb1ow 12-10-2008 12:32 PM

Ok cool cool.

LTb1ow 12-11-2008 04:03 PM

So I was doing some window shopping, and Scat forged rods, both I and H are rated to 750 hp, whats the deal with that?
Also, can anyone explain bushed vs. pinned?

Pampered-Z 12-12-2008 09:03 AM

H <> I Look at the weight and material used as the main reasons for their HP ratings. The design H or I has less to do with what HP they will support compared to what they are made of. I 'think" some manufactures perfer H or I as well. With mine the I's were listed as stronger then H.

Think they are referring to Pinned/brushed relates to the rod pin that holds the piston to the rod.

Pinned = Rod pins are pressed in. ( most common )

Brushed = Rod is free floating and held in with retaining clips. (Mostly for all out race egines that are trying to squeeze that last 1 HP out).

** I have no idea why it would make more HP? Maybe with it free floating there is less drag as the piston moves/changes angles???

LTb1ow 12-12-2008 03:49 PM

So bushed would be the better bet for longevity?
And now onto the next question, rod length, I have heard a lot of different opinions.
I was even told to go 5.85... any logic?
What do you think of the 5.7 rod allowing for more heat or something?


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