Custom Pistons

Posted By: 69dart

Custom Pistons - 12/06/14 06:12 PM

I'm starting the process of building a new 383 for the roadster. Since it doesn't look like anyone makes forged dome pistons for a 4.28 or 4.31 bore with a 1.32 compression height it looks like I may need to order a set of custom pistons. I basically need the Ross 99499 in a 4.28 bore.

What's everyone's favorite source and what kind of price can I expect?

Posted By: Quicktree

Re: Custom Pistons - 12/06/14 06:15 PM

diamond would be a good choice, but how did you end up with a 4.28 bore

why not just go with a common size?

Posted By: 69dart

Re: Custom Pistons - 12/06/14 06:20 PM

A 383 standard bore is 4.25 so .030 over is 4.28 and .060 over is 4.31.

Posted By: Quicktree

Re: Custom Pistons - 12/06/14 06:24 PM

I understand, but i would find and off the shelf piston and go with that bore. be a lot cheaper unless you just want a custom piston.

Posted By: CHAPPER

Re: Custom Pistons - 12/06/14 06:27 PM

I would call Ross. They can fix you up. I would estimate $900 w/pins.

Posted By: GTS340

Re: Custom Pistons - 12/06/14 06:32 PM

Quote:

I'm starting the process of building a new 383 for the roadster. Since it doesn't look like anyone makes forged dome pistons for a 4.28 or 4.31 bore with a 1.32 compression height it looks like I may need to order a set of custom pistons. I basically need the Ross 99499 in a 4.28 bore.

What's everyone's favorite source and what kind of price can I expect?

RaceTec. If they make it from one of their AutoTec forgings less than $700. I was recently quoted $685 directly from them for a 4.28 replacement for the old TRW 2293 heavy dome piston with 22cc dome only in a 1.53CH. If a member here is a dealer you may find better pricing. Their AutoTec shelf offerings are nice for the money.

Posted By: boatracer572

Re: Custom Pistons - 12/06/14 07:10 PM

I used JE pistons this time around for my new (bigger) predator shortblock. pored a chamber mold, told them what options i wanted,pin height,ring package,exc. and had them in two weeks...I was a ross piston guy for years, but after seeing the quality and fit JE pistons puts out there im changing brands for good..... BTW there about the same price as ross..

Attached picture 8353164-10733863_10204184294279816_6607760799322916106_o.jpg

Attached picture 8353164-10733863_10204184294279816_6607760799322916106_o.jpg

Posted By: boatracer572

Re: Custom Pistons - 12/06/14 07:11 PM

this is the mold I poured...

Attached picture 8353166-10658787_10204184296319867_8416882729651393568_o.jpg

Posted By: Thumperdart

Re: Custom Pistons - 12/06/14 07:22 PM

Quote:

I used JE pistons this time around for my new (bigger) predator shortblock. pored a chamber mold, told them what options i wanted,pin height,ring package,exc. and had them in two weeks...I was a ross piston guy for years, but after seeing the quality and fit JE pistons puts out there im changing brands for good..... BTW there about the same price as ross..

Been using JE`s for as long a I can remember.

Posted By: Bigcube

Re: Custom Pistons - 12/06/14 07:29 PM

Used Ross the first time and Diamond the second. Quality was nice with both.

Posted By: Monte_Smith

Re: Custom Pistons - 12/06/14 07:48 PM

Quote:

I'm starting the process of building a new 383 for the roadster. Since it doesn't look like anyone makes forged dome pistons for a 4.28 or 4.31 bore with a 1.32 compression height it looks like I may need to order a set of custom pistons. I basically need the Ross 99499 in a 4.28 bore.

What's everyone's favorite source and what kind of price can I expect?

You do realize that you don't have to do anything in equal increments right. What I mean is.....if you have to order a custom piston anyway, bore it enough to straighten the bore, whatever that number is and order a piston made to fit that bore. No need to go exactly .030 or .060, unless you just want it that big.

Personally, I use nothing but Diamond or Venolia

Monte

Posted By: 451Mopar

Re: Custom Pistons - 12/06/14 08:13 PM

I think the ROSS custom pistons dome are around $1100-1200/set last set my friend bought?

Posted By: NBTXDART

Re: Custom Pistons - 12/06/14 08:50 PM

I Have A Set Of JE's 0.30 With 20 Runs On Them. Will Let Them Go.I'll Post Pics Later This Weekend

Posted By: RT540

Re: Custom Pistons - 12/06/14 09:27 PM

My last set of custom pistons was bought through Scott Brown and came from CP.
Scott quoted me prices for Ross, Diamond and CP, but recommended me to go with CP.
Really nice finish and fit.

Posted By: fbs63

Re: Custom Pistons - 12/06/14 09:30 PM

I think Diamond has a shelf piston for that combo.

Posted By: MR_P_BODY

Re: Custom Pistons - 12/06/14 09:46 PM

Quote:

I think Diamond has a shelf piston for that combo.

I would talk to Diamond.. they should have a shelf
piston and if you want to move the CH from stock then
its a $35 charge.. they allow 2 changes to a shelf
piston.. anything more and its called a custom piston..
my last set from them I changed the CH and added a
22cc dish so I could have a good quench and the compression
I wanted (pump gas stuff)... they had them for me
to pick up in 4 days

Posted By: GTS340

Re: Custom Pistons - 12/06/14 10:04 PM

Quote:

I think Diamond has a shelf piston for that combo.

They dont. They have a flat top but no dome listed. I doubt putting a shelf dome configuration on a shelf flat is a $35 change because it would require a bigger blank. Worth checking though.

Posted By: 69dart

Re: Custom Pistons - 12/06/14 10:59 PM

If I could get the 4.375 piston in a 4.31 that would be perfect. If its really going to run $1100 I may just scrap the 383 blocks and find a 400 block since I'm pretty much starting from scratch anyway.

I'd be fine running the old domed TRW's if I could find another set.

Posted By: GTS340

Re: Custom Pistons - 12/06/14 11:09 PM

http://www.racetecpistons.com/

Great price, nice product! Get exactly what you want for around the price of a shelf Ross. Owned by Wayne Brooks formerly of JE

Posted By: FastmOp

Re: Custom Pistons - 12/07/14 01:11 AM

If your going custom find an easy ring size you like and build to it. It would be bad to have a custom piston and custom ring. If you ever hurt something it will pay off.

Posted By: nss guy

Re: Custom Pistons - 12/07/14 01:53 AM

for bracket racing, why are you making it difficult?
10.00 motor vs 9.60 motor, does one pay better than the other?
See what the cylinders need to get them straight then find a shelf piston to fit that's in the that range.

Posted By: GTS340

Re: Custom Pistons - 12/07/14 02:06 AM

Quote:

for bracket racing, why are you making it difficult?
10.00 motor vs 9.60 motor, does one pay better than the other?
See what the cylinders need to get them straight then find a shelf piston to fit that's in the that range.

Here is the problem with the 383, with it's short stroke a dome piston is necessary to achieve adequate compression, with the HEAVY TRW/SPEEDPRO L2293 being discontinued there are no forged 383 dome pistons that I have seen from any of the popular manufacturers, making a custom piston pretty much a necessity. I prefer custom pistons in everything I do anyway!

Posted By: steeldust

Re: Custom Pistons - 12/10/14 05:33 AM

Racetec Custom pistons are nice and working great in my 582 with a fogger .

Posted By: JohnRR

Re: Custom Pistons - 12/10/14 08:33 AM

Quote:

I'm starting the process of building a new 383 for the roadster. Since it doesn't look like anyone makes forged dome pistons for a 4.28 or 4.31 bore with a 1.32 compression height it looks like I may need to order a set of custom pistons. I basically need the Ross 99499 in a 4.28 bore.

What's everyone's favorite source and what kind of price can I expect?

I have a set of the pistons you are looking for, what stroke are you planning on building?

The piston is a custom Diamond with an effective 9.9cc dome , 4.280 bore, 1.32 CH, CNC lightened , coated skirts and ceramic coated top , they cost me $1100 when I bought them back in 06.

Attached picture 8357272-383piston.jpg

Posted By: Airwoofer

Re: Custom Pistons - 12/10/14 05:57 PM

Man you guys got off easy. Diamond has quoted me a whole lot more for the set of slugs for the 496. Damn rings were $400 just by themselves. Pins another $200, cause my old ones were squarshed. And I ain't getting no fancy coatings either.

Posted By: JohnRR

Re: Custom Pistons - 12/10/14 06:53 PM

Quote:

Man you guys got off easy. Diamond has quoted me a whole lot more for the set of slugs for the 496. Damn rings were $400 just by themselves. Pins another $200, cause my old ones were squarshed. And I ain't getting no fancy coatings either.

I can't remember if that included the pins, but did include the shipping ... and it was 8 years ago.

Posted By: DAYTONA540

Re: Custom Pistons - 12/10/14 07:03 PM

I don't know what Diamond's are on special order. But I just got some made by Ross with my C/H, Valve notch depth and diameter, F/T for $824 at my door. Not that much more than a shelf piston.Took 14 days from the time I called them they were here.
That was with no pins. :

Posted By: Bickel Motors

Re: Custom Pistons - 12/10/14 07:59 PM

I have a set of Arias pistons with pins and rings. 4.28 Bore. Pm me or e-mail me bickelmotors@hotmail.com

Posted By: 69dart

Re: Custom Pistons - 12/10/14 11:14 PM

Thanks for all the responses!!

I'm waiting for the engine builder to decide what bore it will take to clean up the block I dropped off last week. As soon as hear from him I'll know what the next will be.

Does anyone know what is the typical max bore for a 383 block? I'm guessing 4.31 but at 4.31 why not go to 4.32 and use a 440 piston? I haven't researched if there is rod available for that combo just thinking aloud.

Posted By: Bigcube

Re: Custom Pistons - 12/11/14 03:17 AM

Quote:

Quote:

Man you guys got off easy. Diamond has quoted me a whole lot more for the set of slugs for the 496. Damn rings were $400 just by themselves. Pins another $200, cause my old ones were squarshed. And I ain't getting no fancy coatings either.

I can't remember if that included the pins, but did include the shipping ... and it was 8 years ago.

The Diamond pistons I bought this winter did not come with pins. I used my old ones.

Posted By: mike s

Re: Custom Pistons - 12/11/14 09:22 AM

You may want to check my post in the "New products" section.

Posted By: JohnRR

Re: Custom Pistons - 12/11/14 03:37 PM

Quote:

Thanks for all the responses!!

I'm waiting for the engine builder to decide what bore it will take to clean up the block I dropped off last week. As soon as hear from him I'll know what the next will be.

Does anyone know what is the typical max bore for a 383 block? I'm guessing 4.31 but at 4.31 why not go to 4.32 and use a 440 piston? I haven't researched if there is rod available for that combo just thinking aloud.

There is no set in stone number for max bore for any block, you need to have it sonic checked to see what the block you have is capable of being bored to.

As far as just take it to 4.320 and use a 440 piston , there are very few, if any , 440's being built on a standard bore considering the last 440 was produced over 2 decades ago, so you probably would be hard pressed to find a shelf stock 440 piston that would work, remember that outside of the 6pk piston , there is no stock , short CH , 440 piston with valve reliefs so thinking you can use a 440 piston shouldn't even be considered.