Heads vs pistons???

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Heads vs pistons???

Post  racinghabbit on March 16th 2018, 2:07 pm

I want to build a 501... d3 block with offset ground crank.
pistons SRP154166 (https://www.summitracing.com/parts/srp-154166-8/overview/make/ford) ... I would like to buy M-6049-scja aluminum ford racing heads but I'm worried about the pistons working with the heads. I don't know if the valve relief is in the correct location.
Has anyone done this?
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Re: Heads vs pistons???

Post  cletus66 on March 16th 2018, 4:32 pm

racinghabbit wrote:I want to build a 501... d3 block with offset ground crank.
pistons SRP154166 (https://www.summitracing.com/parts/srp-154166-8/overview/make/ford)  ... I would like to buy M-6049-scja aluminum ford racing heads but I'm worried about the pistons working with the heads. I don't know if the valve relief is in the correct location.
Has anyone done this?


If a particular piston will work with SCJ heads, it should tell you in the specs. You can make your own valve reliefs, but you just need to buy the correct pistons for the heads you will be using.
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Re: Heads vs pistons???

Post  racinghabbit on March 16th 2018, 4:52 pm

they don't work... so I went on srp website , they don't offer a piston for the 4.14 stroke with scj heads...
Who does?
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Re: Heads vs pistons???

Post  dfree383 on March 16th 2018, 6:25 pm

Diamond
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Re: Heads vs pistons???

Post  Colt Macara on March 17th 2018, 12:48 am

racinghabbit wrote:they don't work... so I went on srp website , they don't offer a piston for the 4.14 stroke with scj heads...
Who does?

What length rods are you going to use. Mahle 930261990 is a 4.390 bore for SCJ heads but calls for a 6.7 rod. Compression distance is 1.525. They make it in a dish and flat top and call it a 4.150 stroke (503). That piston you were looking at at Summit is a 1.520 CD

http://www.us.mahle.com/media/motorsports/2018-application-guide-compressed.pdf

edit: # for the flattop 930261790
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Re: Heads vs pistons???

Post  wayney on March 17th 2018, 2:31 pm

I have a set of diamonds with very little use with rings for a 521 I will sell shipped for $550 for those heads. rings are file fit total seal and new in the box.

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Re: Heads vs pistons???

Post  Carl on March 20th 2018, 11:41 am

Diamond is the only piston manufacturer that offers an SCJ piston for 4.150 stroke. I sell a fair number of them, or have, but with AFR heads being on the market now, most are going that way and we just change the valve pocket to suit.

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Re: Heads vs pistons???

Post  pmrphil on March 20th 2018, 1:45 pm

Try Racetec

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Re: Heads vs pistons???

Post  Colt Macara on March 20th 2018, 7:42 pm

Carl wrote:Diamond is the only piston manufacturer that offers an SCJ piston for 4.150 stroke.  I sell a fair number of them, or have, but with AFR heads being on the market now, most are going that way and we just change the valve pocket to suit.

MAHLE

BIG BLOCK FORD for the SCJ, KAASE P-51®️, AFR 14° BULLIT CYLINDER HEADS

1.5, 1.5, 3.0mm File Fit Performance Ring Set included 72cc 80cc 84cc

503 4.390 4.150 6.700 1.525 0.990 -28cc 591 10.4 9.7 9.4 4032 0.235 0.0041 0.0049 930261990

514 4.440 610 930261940

503 4.390 -3cc TBD 13.1 12.1 11.6 2618 0.235 0.0061 0.0069 930261790

514 4.440 TBD 13.3 12.3 11.8 930261740
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Re: Heads vs pistons???

Post  Colt Macara on March 20th 2018, 7:57 pm

Mahle Piston Kit 930261990; 4.390" Bore -28.0cc Dish for Ford BBF (w/ SCJ Heads)

Make: Ford
Engine: BBF (w/ SCJ, Kaase P-51, AFR 14, & Bullit Cylinder Heads)
Bore: 4.390" Bore
Stroke: 4.150" Stroke
Rod Length: 6.700" Rod
Compression Height: 1.525"
Crown Volume: -28.0cc Dish
Weight: 532.0g
Compression Ratio: 9.7:1
Pin Diameter: .990"
Piston Material: Forged 4032 Alloy
Quantity: Sold As Kit
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Re: Heads vs pistons???

Post  Carl on March 21st 2018, 10:28 am

Colt Macara wrote:

Mahle Piston Kit 930261990; 4.390" Bore -28.0cc Dish for Ford BBF (w/ SCJ Heads)

Make: Ford
Engine: BBF (w/ SCJ, Kaase P-51, AFR 14, & Bullit Cylinder Heads)
Bore: 4.390" Bore
Stroke: 4.150" Stroke
Rod Length: 6.700" Rod
Compression Height: 1.525"
Crown Volume: -28.0cc Dish
Weight: 532.0g
Compression Ratio: 9.7:1
Pin Diameter: .990"
Piston Material: Forged 4032 Alloy
Quantity: Sold As Kit

Are those actually available?  Not finding them for sale anywhere except an ebay listing, which doesn't have a picture of them.  They do note it's a 4032 alloy.  No +.040 or +.060 available.  And while the SCJ and AFR valve locations are similar, they're not the same, so it it a dual pocket?


.

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Re: Heads vs pistons???

Post  Colt Macara on March 21st 2018, 12:28 pm

Carl wrote:
Colt Macara wrote:

Mahle Piston Kit 930261990; 4.390" Bore -28.0cc Dish for Ford BBF (w/ SCJ Heads)

Make: Ford
Engine: BBF (w/ SCJ, Kaase P-51, AFR 14, & Bullit Cylinder Heads)
Bore: 4.390" Bore
Stroke: 4.150" Stroke
Rod Length: 6.700" Rod
Compression Height: 1.525"
Crown Volume: -28.0cc Dish
Weight: 532.0g
Compression Ratio: 9.7:1
Pin Diameter: .990"
Piston Material: Forged 4032 Alloy
Quantity: Sold As Kit

Are those actually available?  Not finding them for sale anywhere except an ebay listing, which doesn't have a picture of them.  They do note it's a 4032 alloy.  No +.040 or +.060 available.  And while the SCJ and AFR valve locations are similar, they're not the same, so it it a dual pocket?


.

I have not seen them. I just saw them in their catalog when I was looking for a 2618 for my 13:1 build. Also noticed they were for sale on eBay. Their catalog shows a 4.390 and a 4.440 in both dish and flat top configurations. I have emailed a guy at Mahle that I have been asking other questions about their alloy. I have asked him if these are available now. I'll let you know what he says.
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Re: Heads vs pistons???

Post  Colt Macara on March 21st 2018, 12:40 pm

Colt Macara wrote:
Carl wrote:
Colt Macara wrote:

Mahle Piston Kit 930261990; 4.390" Bore -28.0cc Dish for Ford BBF (w/ SCJ Heads)

Make: Ford
Engine: BBF (w/ SCJ, Kaase P-51, AFR 14, & Bullit Cylinder Heads)
Bore: 4.390" Bore
Stroke: 4.150" Stroke
Rod Length: 6.700" Rod
Compression Height: 1.525"
Crown Volume: -28.0cc Dish
Weight: 532.0g
Compression Ratio: 9.7:1
Pin Diameter: .990"
Piston Material: Forged 4032 Alloy
Quantity: Sold As Kit

Are those actually available?  Not finding them for sale anywhere except an ebay listing, which doesn't have a picture of them.  They do note it's a 4032 alloy.  No +.040 or +.060 available.  And while the SCJ and AFR valve locations are similar, they're not the same, so it it a dual pocket?


.

I have not seen them. I just saw them in their catalog when I was looking for a 2618 for my 13:1 build. Also noticed they were for sale on eBay. Their catalog shows a 4.390 and a 4.440 in both dish and flat top configurations. I have emailed a guy at Mahle that I have been asking other questions about their alloy. I have asked him if these are available now. I'll let you know what he says.

This is a quote from Jason Griffith of Mahle pistons.........
"Yes we have made a bunch of these pistons for the SCJ, Kaase & AFR head.  Which combination are you needing for sure see below the offerings."

And then he posted the piston sizes I posted above for the 4.150, 4.300, 4.500 strokers
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Re: Heads vs pistons???

Post  Colt Macara on March 21st 2018, 1:07 pm

Colt Macara wrote:
Colt Macara wrote:
Carl wrote:
Colt Macara wrote:

Mahle Piston Kit 930261990; 4.390" Bore -28.0cc Dish for Ford BBF (w/ SCJ Heads)

Make: Ford
Engine: BBF (w/ SCJ, Kaase P-51, AFR 14, & Bullit Cylinder Heads)
Bore: 4.390" Bore
Stroke: 4.150" Stroke
Rod Length: 6.700" Rod
Compression Height: 1.525"
Crown Volume: -28.0cc Dish
Weight: 532.0g
Compression Ratio: 9.7:1
Pin Diameter: .990"
Piston Material: Forged 4032 Alloy
Quantity: Sold As Kit

Are those actually available?  Not finding them for sale anywhere except an ebay listing, which doesn't have a picture of them.  They do note it's a 4032 alloy.  No +.040 or +.060 available.  And while the SCJ and AFR valve locations are similar, they're not the same, so it it a dual pocket?


.

I have not seen them. I just saw them in their catalog when I was looking for a 2618 for my 13:1 build. Also noticed they were for sale on eBay. Their catalog shows a 4.390 and a 4.440 in both dish and flat top configurations. I have emailed a guy at Mahle that I have been asking other questions about their alloy. I have asked him if these are available now. I'll let you know what he says.

This is a quote from Jason Griffith of Mahle pistons.........
"Yes we have made a bunch of these pistons for the SCJ, Kaase & AFR head.  Which combination are you needing for sure see below the offerings."

And then he posted the piston sizes I posted above for the 4.150, 4.300, 4.500 strokers

Carl, FWIW, This is a very responsive contact at Mahle Pistons.......

Jason Griffin
MAHLE Engine Components USA, Inc.
MAHLE Motorsports (ENP43S)

270 Rutledge Road, Unit C, Fletcher, North Carolina 28732 USA
Phone: +1 (828) 650-51 72, Fax: +1 (828) 650-08 19
jason.griffin@us.mahle.com, http://www.us.mahle.com
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Re: Heads vs pistons???

Post  Mark O'Neal on March 21st 2018, 8:21 pm

Carl wrote:Diamond is the only piston manufacturer that offers an SCJ piston for 4.150 stroke.  I sell a fair number of them, or have, but with AFR heads being on the market now, most are going that way and we just change the valve pocket to suit.

I do them in 4032 (SRS) or 2618 (PRS)...both heads.

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Re: Heads vs pistons???

Post  Colt Macara on March 22nd 2018, 1:52 pm

Mark O'Neal wrote:
Carl wrote:Diamond is the only piston manufacturer that offers an SCJ piston for 4.150 stroke.  I sell a fair number of them, or have, but with AFR heads being on the market now, most are going that way and we just change the valve pocket to suit.

I do them in 4032 (SRS) or 2618 (PRS)...both heads.

Very Happy
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Re: Heads vs pistons???

Post  racinghabbit on March 29th 2018, 5:04 pm

thanks
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