scat 4.5 crank

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Re: scat 4.5 crank

Post  powerstrokeace on December 28th 2013, 11:37 pm

MustangDan wrote:Well a lot of people are telling me scat cranks and rods are really not good after 100hp ?

A 100HP?

Ace
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Re: scat 4.5 crank

Post  MustangDan on December 29th 2013, 12:02 am

Yeah 100 hp man lol

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Re: scat 4.5 crank

Post  David Cole on December 29th 2013, 12:18 am

MustangDan wrote:Well a lot of people are telling me scat cranks and rods are really not good after 100hp ?

Who is "a lot of people" ?
Any chance some of them are in biz selling other brand cranks?
My 598 is well over 1000 hp NA and has been sprayed another 300 on top of that.  Scat forging and h beams with upgraded bolts.
There are numerous members here with 1000 hp Scat deals.
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Re: scat 4.5 crank

Post  MustangDan on December 29th 2013, 9:36 pm

Ok thanks

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Re: scat 4.5 crank

Post  richter69 on December 29th 2013, 11:40 pm

MustangDan wrote:Well a lot of people are telling me scat cranks and rods are really not good after 100hp ?

hope its not the same folks claiming a back cut set of SCJ's will outflow a set of P 51s??????
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Re: scat 4.5 crank

Post  MustangDan on December 29th 2013, 11:59 pm

Well it depends on what you mean buy out flow if you port scj they will out flow stock p51 but both ported will p wins

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Re: scat 4.5 crank

Post  MustangDan on December 30th 2013, 12:02 am

And no its people that has built and raced a lot of bbf scj flow 411@700 ported box p flow 360 ish out the box

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Re: scat 4.5 crank

Post  richter69 on December 30th 2013, 12:30 am

thats funny, Kasse lists the p51 as flowing 401 at .700 lift...... out of the box
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Re: scat 4.5 crank

Post  MustangDan on December 30th 2013, 12:37 am

I was just on his page did see that at all

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Re: scat 4.5 crank

Post  MustangDan on December 30th 2013, 12:42 am

Just looked again  395@800 int  239@800 exh  and both stock p51 don't get any better till .500lift and that's on kasse page

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Re: scat 4.5 crank

Post  richter69 on December 30th 2013, 1:19 am

The Best Flowing, Most Powerful, User Friendly 429-460 Wedge Cylinder heads on the Market!

THE BEST COBRA JET STYLE CYLINDER HEADS ON THE MARKET!

Specifications:
• 72cc CNC MACHINED CHAMBERS
• INTAKE RUNNER VOLUME 310CC
• EXHAUST PORT VOLUME 145CC
• INTAKE VALVE DIAMETER 2.250
• EXHAUST VALVE DIAMETER 1.760
• VALVE LENGTH (INT./EXH.) 5.365 / 5.150
• INTAKE VALVE ANGLE 8.3 DEGREES
• INTAKE VALVE CANT 4.7 DEGREES
• EXHAUST VALVE ANGLE 4.0 DEGREES
• EXHAUST VALVE CANT 3.2 DEGREES
• SPRING DIAMETER 1.550
• VALVE GUIDE 11/32

Flow Chart as Delivered @ 28" Superflow 600
P51
Intake .100 105
.200 175
.300 258
.400 330
.500 375
.600 395
.700 401


Exhaust .100 103
.200 137
.300 170
.400 199
.500 223
.600 242
.700 251

PRICING:
• BARE CYLINDER HEADS $845.00 EACH
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Re: scat 4.5 crank

Post  MustangDan on December 30th 2013, 1:46 am

scroll down a little further and look where they compare them to the Super Cobra Jet head and don't say those numbers 395@800

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Re: scat 4.5 crank

Post  rmcomprandy on December 30th 2013, 11:14 am

MustangDan wrote:scroll down a little further and look where they compare them to the Super Cobra Jet head and don't say those numbers 395@800

IF you are gonna base your engine and simply race the highest air-flow numbers, you will be a loser from the start.

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Re: scat 4.5 crank

Post  MustangDan on December 30th 2013, 11:32 am

I'm not even using scj or p I have a460 I'm just saying what the flow chart says against each other on that page scj will flow more then p ported scj ported v/s box p51 scj flow more

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Re: scat 4.5 crank

Post  J.Toney on December 30th 2013, 1:14 pm

I've enjoyed watching this thread de-rail! Razz  And I'm no engineer/builder, but I sure don't see many SCJ's builds  posting power #'s topping the P-51's, OTB or otherwise. From what I've learned, the p-51 is modeled AFTER a modified SCJ in the first place, it would only make sense that this is a step up the ladder as far as airflow quality and #'s go.
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Re: scat 4.5 crank

Post  rmcomprandy on December 30th 2013, 4:06 pm

J.Toney wrote:I've enjoyed watching this thread de-rail! Razz  And I'm no engineer/builder, but I sure don't see many SCJ's builds  posting power #'s topping the P-51's, OTB or otherwise. From what I've learned, the p-51 is modeled AFTER a modified SCJ in the first place, it would only make sense that this is a step up the ladder as far as airflow quality and #'s go.

AND,valve train geometry AND, combustion chamber shape AND, casting thickness integrity - to mention some other upgrades.

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Re: scat 4.5 crank

Post  IDT-572 on December 30th 2013, 6:44 pm

MustangDan wrote:And no its people that has built and raced a lot of bbf scj flow 411@700 ported box p flow 360 ish out the box
. The worst I have seen is high 380s and it takes very little porting to get them to 411.
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Re: scat 4.5 crank

Post  richter69 on December 30th 2013, 7:32 pm

seems legit......
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Re: scat 4.5 crank

Post  Carl on January 3rd 2014, 11:19 am


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Re: scat 4.5 crank

Post  IDT-572 on January 3rd 2014, 11:21 am

Big difference in cosmetics........ The Lunati looks nice.
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Re: scat 4.5 crank

Post  Carl on January 3rd 2014, 11:29 am

IDT-572 wrote:Big difference in cosmetics........ The Lunati looks nice.

They are.  Twisted Evil 

I have several in stock. If anyone has a picture of a Scat crank to post, I can orient the Lunati in the same fashion and take a picture.....call it a virtual side by side comparison.

 cyclops 

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Re: scat 4.5 crank

Post  Lem Evans on January 3rd 2014, 12:40 pm

IDT-572 wrote:Big difference in cosmetics........ The Lunati looks nice.

The last three crankshafts I have sold were forged Lunati....the finish of them is very nice.

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Re: scat 4.5 crank

Post  jbozzelle on January 3rd 2014, 12:58 pm

rmcomprandy wrote:AND,valve train geometry AND, combustion chamber shape AND, casting thickness integrity - to mention some other upgrades.


What was changed on the valvetrain geometry? I've seen the P51 and SCJ guideplates side by side and they look similar but one wouldn't bolt to the other head and vice versa. How far are the valves moved around?

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Re: scat 4.5 crank

Post  rmcomprandy on January 3rd 2014, 3:44 pm

jbozzelle wrote:
rmcomprandy wrote:AND,valve train geometry AND, combustion chamber shape AND, casting thickness integrity - to mention some other upgrades.


What was changed on the valvetrain geometry?  I've seen the P51 and SCJ guideplates side by side and they look similar but one wouldn't bolt to the other head and vice versa.  How far are the valves moved around?

The valves are not moved but, they are longer and the studs are at a slightly different angle which is why a different "girdle" is necessary.

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Re: scat 4.5 crank

Post  85bigblockfox on January 3rd 2014, 4:15 pm

J.Toney wrote:I've enjoyed watching this thread de-rail! Razz  And I'm no engineer/builder, but I sure don't see many SCJ's builds  posting power #'s topping the P-51's, OTB or otherwise. From what I've learned, the p-51 is modeled AFTER a modified SCJ in the first place, it would only make sense that this is a step up the ladder as far as airflow quality and #'s go.

I bet varleys scj headed 52x is faster then hEros black bullet...............
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