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Re: Scat I beam rods, SB, 600+ hp???
[Re: mshred]
#1365227
01/06/13 06:20 PM
01/06/13 06:20 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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All I will say is I've seen a FEW Scat I-beam torn in half.... and IF it were me I'd set up to a H-beam.... JMO.. but I build things to live...... again ... JMO 
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Re: Scat I beam rods, SB, 600+ hp???
[Re: MR_P_BODY]
#1365228
01/06/13 06:36 PM
01/06/13 06:36 PM
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Joined: Jan 2003
Posts: 20,762
A collage of whims
topside
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,762
A collage of whims
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Me, Eagle H-beams, about 640HP, 8,000RPM, R1 block.
Stock block has very little "meat" around the pan rail & webs, and to me I-beam limit is 500HP & 6500RPM; not that you can't push it harder, but I have a bucket of shrapnel left over from the stock block & I-beams that I pushed a bit too far...
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Re: Scat I beam rods, SB, 600+ hp???
[Re: topside]
#1365229
01/06/13 08:32 PM
01/06/13 08:32 PM
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Joined: Oct 2003
Posts: 1,409
Ont. Canada
10.90 Racer
super street
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super street
Joined: Oct 2003
Posts: 1,409
Ont. Canada
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The Scat I beam rods look like a decent Chinese rod. Nothing wrong with most I-beams....... Years ago there were some eagle I-beams that were not too beefy........ These were trouble...... If you are going to spray that engine the rods and block are the very least of your worries!!! Concentrate on your fuel system, tune-up, Fuel just to start and that's not even getting into the engine........ Nitrous is NOT an easy bolt on nor is it cheap.......... 
Last edited by 10.90 Racer; 01/06/13 08:33 PM.
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Re: Scat I beam rods, SB, 600+ hp???
[Re: Quicktree]
#1365231
01/06/13 08:39 PM
01/06/13 08:39 PM
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Joined: Jan 2003
Posts: 5,484
SoCal
Brian Hafliger
master
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master
Joined: Jan 2003
Posts: 5,484
SoCal
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They are fine at that level but I would be careful going beyond that and rpm/load play into this.
Most times a rod fails at the beam is because the piston was hitting something like the head, a valve, or gasket hanging in the bore.
Brian Hafliger
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Re: Scat I beam rods, SB, 600+ hp???
[Re: Locomotion]
#1365233
01/06/13 10:14 PM
01/06/13 10:14 PM
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Joined: Oct 2003
Posts: 1,409
Ont. Canada
10.90 Racer
super street
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super street
Joined: Oct 2003
Posts: 1,409
Ont. Canada
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Quote:
Just an observation and I'd welcome any clarification, but it appears that despite being similar in appearance, the Scat 4340 I-beams appear to be better/stronger than the 5140 Eagle I-beams because of better material. It's been a while since I've seen a 273/318 rod, but I assume these aftermarket rods are similar to them in design?
They are better than the original 5140 eagle. The 5140's were very thin around the main pin.......
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Re: Scat I beam rods, SB, 600+ hp???
[Re: Quicktree]
#1365234
01/07/13 12:56 AM
01/07/13 12:56 AM
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Joined: Apr 2009
Posts: 3,415
Toronto
mshred
OP
master
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OP
master
Joined: Apr 2009
Posts: 3,415
Toronto
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Quote:
really what does a new set of good rods cost? what does a new motor cost. you make the choice
I hear ya, and this is why I am asking now before the motor goes together...I was never really sure what the rating on I-beam rods was- in fact, I have read some internet debates where some argue I beams are better then H! (I know, don't believe everything you read on the internet LOL).
I was just unsure is all, and a friend turned me on to the possible issue when I mentioned stroker with light spray here and there
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Re: Scat I beam rods, SB, 600+ hp???
[Re: Brian Hafliger]
#1365235
01/07/13 12:57 AM
01/07/13 12:57 AM
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Joined: Apr 2009
Posts: 3,415
Toronto
mshred
OP
master
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OP
master
Joined: Apr 2009
Posts: 3,415
Toronto
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Quote:
They are fine at that level but I would be careful going beyond that and rpm/load play into this.
Most times a rod fails at the beam is because the piston was hitting something like the head, a valve, or gasket hanging in the bore.
Brian, we briefly talked about this when we discussed the cam... I know for a motor deal they really should be fine, BUT, if I do decide to toss the odd 150 shot at the old girl every once in a while, do you think that changes anything?
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Re: Scat I beam rods, SB, 600+ hp???
[Re: Locomotion]
#1365236
01/07/13 12:59 AM
01/07/13 12:59 AM
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Joined: Apr 2009
Posts: 3,415
Toronto
mshred
OP
master
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OP
master
Joined: Apr 2009
Posts: 3,415
Toronto
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Quote:
Just an observation and I'd welcome any clarification, but it appears that despite being similar in appearance, the Scat 4340 I-beams appear to be better/stronger than the 5140 Eagle I-beams because of better material. It's been a while since I've seen a 273/318 rod, but I assume these aftermarket rods are similar to them in design?
Thats something I should have mentioned in my original post too...not sure if Scat offers rods in different material with the I beam design (I thought they did), but I am running the 4340 I beam rods if that makes a difference at all 
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Re: Scat I beam rods, SB, 600+ hp???
[Re: 10.90 Racer]
#1365237
01/07/13 01:01 AM
01/07/13 01:01 AM
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Joined: Apr 2009
Posts: 3,415
Toronto
mshred
OP
master
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OP
master
Joined: Apr 2009
Posts: 3,415
Toronto
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Quote:
The Scat I beam rods look like a decent Chinese rod. Nothing wrong with most I-beams....... Years ago there were some eagle I-beams that were not too beefy........ These were trouble......
If you are going to spray that engine the rods and block are the very least of your worries!!! Concentrate on your fuel system, tune-up, Fuel just to start and that's not even getting into the engine........ Nitrous is NOT an easy bolt on nor is it cheap..........
Steve, I know nitrous is not a bolt on and go deal...I built my fuel system last year with a small shot in mind, and was planning on trying a small hit if valvetrain damage didn't put an early end to my year.
I just want to be sure that I won't be pushing the limits of the parts I am using in the motor...I've had the darn thing apart 3 times now, and I kinda want it this to be the last time for a while until it needs a freshen up LOL
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Re: Scat I beam rods, SB, 600+ hp???
[Re: mshred]
#1365238
01/07/13 02:46 AM
01/07/13 02:46 AM
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Joined: Oct 2007
Posts: 4,206
New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,206
New York
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Power ratings are only a sales tool.
Boffin Emeritus
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Re: Scat I beam rods, SB, 600+ hp???
[Re: polyspheric]
#1365239
01/07/13 04:08 AM
01/07/13 04:08 AM
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Joined: Jan 2003
Posts: 5,484
SoCal
Brian Hafliger
master
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master
Joined: Jan 2003
Posts: 5,484
SoCal
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Once you run NOS, you'll never want to stop. So go H beam.
Brian Hafliger
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Re: Scat I beam rods, SB, 600+ hp???
[Re: mshred]
#1365240
01/07/13 07:21 AM
01/07/13 07:21 AM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
Quote:
really what does a new set of good rods cost? what does a new motor cost. you make the choice
I hear ya, and this is why I am asking now before the motor goes together...I was never really sure what the rating on I-beam rods was- in fact, I have read some internet debates where some argue I beams are better then H! (I know, don't believe everything you read on the internet LOL).
I was just unsure is all, and a friend turned me on to the possible issue when I mentioned stroker with light spray here and there
I beams are stronger when using a quality rod, but cheap aftermarket is a different story. go h beam..
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Re: Scat I beam rods, SB, 600+ hp???
[Re: Quicktree]
#1365241
01/07/13 10:53 AM
01/07/13 10:53 AM
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Joined: Apr 2009
Posts: 3,415
Toronto
mshred
OP
master
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OP
master
Joined: Apr 2009
Posts: 3,415
Toronto
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So whose H- Beam rods do you guys like??? Right off the bat Eagle and Scat come to mind, and they are both similar in price on summit...Knowing Eagle's reputation with their I beam stuff, is one brand better than the other in this area, or are they pretty much even in terms of quality and fit?? quick summit search gave me a variety of them http://www.summitracing.com/search/part-...am-style/h-beam
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Re: Scat I beam rods, SB, 600+ hp???
[Re: mshred]
#1365242
01/07/13 11:12 AM
01/07/13 11:12 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I bought a set of Eagle H-beams YEARS ago and I liked them so I bought 2 more sets.. that was when their quality seemed better(they checked fine back then) but I dont know about now days.... all my SBs have the Eagle H-beams and no issues... one set turns 8200 and has seen 9000+
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Re: Scat I beam rods, SB, 600+ hp???
[Re: Brian Hafliger]
#1365244
01/07/13 03:20 PM
01/07/13 03:20 PM
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Joined: Apr 2009
Posts: 3,415
Toronto
mshred
OP
master
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OP
master
Joined: Apr 2009
Posts: 3,415
Toronto
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Quote:
Once you run NOS, you'll never want to stop. So go H beam.
Brian, which H beams do you prefer? Scat or Eagle?
Also, I am assuming with the H beams, im going to need to clearance the block for the stroker crank???
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