Scat rods/crank limitations

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Scat rods/crank limitations

Post  soupbean on November 26th 2013, 9:49 pm

In real world applications, how much power and RPM can the Scat crank and rods handle? What do you guys think would be a good crank and rod set up for a healthy shot on top of a 1000+ hp n/a deal?
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Re: Scat rods/crank limitations

Post  dfree383 on November 26th 2013, 11:01 pm

The forged cranks will work in applications over 1000hp and plenty of guys are spinning them over 7500. 

But like anything else at this level.and above you need quality machine work, assembly and tuning skills. It's pretty easy to break stuff if you do it wrong.
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Re: Scat rods/crank limitations

Post  IDT-572 on November 26th 2013, 11:47 pm

I have a Scat crank and Eagle 6.8 H beam rods with 2000 bolt upgrade. 1000 hp with a 200 shot on it shifting at 7200.

So far so good.
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Re: Scat rods/crank limitations

Post  richter69 on November 27th 2013, 12:08 am

forged 4.3 scat crank and H beams in my deal, 5.13 8.03 at 3070 pds..... 8000 rpm a time or two.

Im replacing the rods with GRP alum this round but the crank stays.

Imo you can put a pretty decent shot to that and not worry..... its all about the tune.

Larry T's deal has been in the 4's at over 3300 pds iirc


also all the stuff I just pulled out of the DD looks fantastic, it was set up as a na deal but the last 2 seasons its been on the bottle every pass down the track.
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Re: Scat rods/crank limitations

Post  rmcomprandy on November 27th 2013, 11:36 am

SOME people can break anything making little power at all...scratch 

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Re: Scat rods/crank limitations

Post  soupbean on November 28th 2013, 12:29 am

richter69 wrote:forged 4.3 scat crank and H beams in my deal, 5.13 8.03 at 3070 pds..... 8000 rpm a time or two.

Im replacing the rods with GRP alum this round but the crank stays.

Imo you can put a pretty decent shot to that and not worry..... its all about the tune.

Larry T's deal has been in the 4's at over 3300 pds iirc


also all the stuff I just pulled out of the DD looks fantastic, it was set up as a na deal but the last 2 seasons its been on the bottle every pass down the track.
So... what is the deal on the aluminum rods? Why do most not run aluminum on n/a deals but do with nitrous with them being fairly close in price?
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Re: Scat rods/crank limitations

Post  soupbean on November 28th 2013, 12:34 am

richter69 wrote:forged 4.3 scat crank and H beams in my deal, 5.13 8.03 at 3070 pds..... 8000 rpm a time or two.

Im replacing the rods with GRP alum this round but the crank stays.

Imo you can put a pretty decent shot to that and not worry..... its all about the tune.

Larry T's deal has been in the 4's at over 3300 pds iirc


also all the stuff I just pulled out of the DD looks fantastic, it was set up as a na deal but the last 2 seasons its been on the bottle every pass down the track.
Did you change your camshaft once you started spraying it heavy?
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Re: Scat rods/crank limitations

Post  richter69 on November 28th 2013, 12:35 am

same cam, im changing it up a bit though this time around but I plan on laying the dick to it next season.
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Re: Scat rods/crank limitations

Post  bigblok2000ranger on November 28th 2013, 8:50 am

soupbean wrote:
richter69 wrote:forged 4.3 scat crank and H beams in my deal, 5.13 8.03 at 3070 pds..... 8000 rpm a time or two.

Im replacing the rods with GRP alum this round but the crank stays.

Imo you can put a pretty decent shot to that and not worry..... its all about the tune.

Larry T's deal has been in the 4's at over 3300 pds iirc


also all the stuff I just pulled out of the DD looks fantastic, it was set up as a na deal but the last 2 seasons its been on the bottle every pass down the track.
So... what is the deal on the aluminum rods? Why do most not run aluminum on n/a deals but do with nitrous with them being fairly close in price?

The aluminum rod motor will accelerate faster even n/a, I suspect they are looking for every last bit.
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Re: Scat rods/crank limitations

Post  schmitty on November 28th 2013, 10:24 am

Aluminum rods don't generally have the lifespan of a forged rod, and are more expensive than using offshore forgings. Aluminum rods act as a "shock absorber" when running N2O, and help with bearing life as such.
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Re: Scat rods/crank limitations

Post  J.Toney on November 28th 2013, 11:11 am

I've been thinking about this very subject, but more concerned about the rods. I was thinking of the HRC I beams, cost wise between a bit more than a scat H-beam, but a bit less than Oliver deals.
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Re: Scat rods/crank limitations

Post  cool40 on November 28th 2013, 12:29 pm

I have never used aluminum rods but I have run a 400 shot on stock rods.
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Re: Scat rods/crank limitations

Post  richter69 on November 28th 2013, 12:42 pm

alum rods are easier on the crank with heavy spray/boost....... but they have a shorter lifespan
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Re: Scat rods/crank limitations

Post  Lem Evans on November 28th 2013, 1:49 pm

It's not all about 'how much' but, also how long a part will last at a given rpm/hp level. The Scat hbeam/arp 2000 rods are way better than they have a right to be considering the price. At some point it'd be wise to let some pump gas guy own the rods while they are still in one piece and feed the engine a fresh set of rods.

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Re: Scat rods/crank limitations

Post  richter69 on November 28th 2013, 2:15 pm

my scats are going in my pumpgas deal for my 64 f100
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Re: Scat rods/crank limitations

Post  Lem Evans on November 28th 2013, 3:10 pm

richter69 wrote:my scats are going in my pumpgas deal for my 64 f100
Fabio, you are the greenest guy I know. 1st it was green oil and now your are recycling rods Cool .

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Re: Scat rods/crank limitations

Post  cool40 on November 28th 2013, 3:40 pm

alien


Last edited by cool40 on November 28th 2013, 4:05 pm; edited 1 time in total
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Re: Scat rods/crank limitations

Post  schmitty on November 28th 2013, 3:45 pm

Lem Evans wrote:
richter69 wrote:my scats are going in my pumpgas deal for my 64 f100
Fabio, you are the greenest guy I know. 1st it was green oil and now your are recycling rods  Cool .
Nah, just penance for scratching headlights.
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Re: Scat rods/crank limitations

Post  richter69 on November 28th 2013, 4:14 pm

Lem Evans wrote:
richter69 wrote:my scats are going in my pumpgas deal for my 64 f100
Fabio, you are the greenest guy I know. 1st it was green oil and now your are recycling rods Cool .




.....and teeth
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Re: Scat rods/crank limitations

Post  TRUKPULR on November 28th 2013, 4:37 pm

Just goes to show you some people can blow anything up. My last motor had a Moldex Billet Crank and Oliver Billet Rods with the bolt upgrade to the 7/16" A1 XTF bolts.
Here's Olivers bolt listing page.

7/16 - oliver/arp std (black bolt)
7/16 - oliver/arp wsb
7/16 - oliver/a1 xtf (extra tough fastener)
7/16 - oliver/arp wsbx (worlds strongest bolt x)
7/16 - oliver/arp ca 625

And I still broke a bolt and junk the motor out .



Dan

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Re: Scat rods/crank limitations

Post  Lem Evans on November 28th 2013, 4:43 pm

With a steel rod and truck pulling rpm..... the c.a. 625 bolt i.m.o.

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Re: Scat rods/crank limitations

Post  kim on November 28th 2013, 4:46 pm

whats the advantage of the CA625 over the wsbx?

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Re: Scat rods/crank limitations

Post  Lem Evans on November 28th 2013, 4:53 pm

It's the 1st time I've heard of a wsbx . I know nothing of it.

The wsb is made from the ARP2000 alloy.

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Re: Scat rods/crank limitations

Post  soupbean on November 28th 2013, 6:00 pm

So with the aluminum rod "life span".... How do we determine when the life of the rod is gone? Other than when it spits out of the pan...
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Re: Scat rods/crank limitations

Post  schmitty on November 28th 2013, 6:55 pm

If you can screw in the bolts with fingers, rods are good, if not, they are probably used up. That was some advise I was given a while back from a fellow BBF guy that does the pulling deal. He has had a few sets in nis day.
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