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FAQs

arrow How do I order custom pistons?

arrow What is the delivery time on custom pistons?

arrow What forms of payment does ROSS accept?

arrow What are the smallest and biggest bore sizes that ROSS can manufacture?

arrow I have an XL400 forging (the number on the inside of the piston). What kind of piston do I have?

arrow When ROSS manufactures pistons, is the clearance built into the piston, or should I make
    the bore bigger?

arrow What number should I set my piston to wall clearance?

arrow How do I get the spirolox into the pistons?

arrow What material does ROSS use to make the pistons?

arrow Can ROSS make hypereutectic or cast pistons?

arrow Can ROSS make 2 cycle engine pistons?

arrow Can ROSS work from a sample piston?

arrow I have a set of a competitor's pistons. Can ROSS rework them?

arrow I need some more pistons, and I have the job card number. How many pistons do I have to order?

arrow How do I determine rights from lefts?

arrow I have a set of a competitor's pistons, and I just need 2 more. Can ROSS make them?

arrow How do I return a set of stocking pistons?

arrow How do I return a set of custom pistons?

arrow How much "lift" will my pistons take?

arrow What kind of ring end gap should I run?

 


 

How do I order custom pistons?

You can download a copy of our custom order form here, then either call us directly (310.536.0100) to place an order or fax the order form (310.536.0333)


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What is the delivery time on custom pistons?

Delivery time varies during the season. Current delivery time is 2 1/2 to 3 weeks according to the date the order was placed. Please allow an additional 4-5 working days for UPS delivery.


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What forms of payment does ROSS accept?

We accept Visa, Mastercard, American Express, Diners Club and Discover cards. A custom order requires a 50% deposit, with the balance due before shipping. A personal check is accepted as a deposit only, however the order will be held until the check clears. Unless your order is paid in full before we ship, all shipments will be sent via UPS, Money Order or Certified Check only. NO EXCEPTIONS unless you are a legitimate business who has filled out our Company Check Accepted form and have been approved by our credit department.

 

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What are the smallest and biggest bore sizes that ROSS can manufacture?

The smallest bore we manufacture is 2.283" (58mm) up to 6.190" (157.2mm).

 

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I have an XL400 forging (the number on the inside of the piston). What kind of piston do I have?

The forging number does not tell us how the piston was manufactured. We MUST have the number that is either stamped on top of the piston, or engraved on the bottom of the pin boss.

 

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When ROSS manufactures pistons, is the clearance built into the piston, or should I make the bore bigger?

ROSS pistons are manufactured with the clearances built into the pistons. For example, if you want a 4.030 bore, the piston will measure 4.026. Always give us the exact bore your block is honed to, and not the piston diameter you want.

 

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What number should I set my piston to wall clearance?

You can download our installation sheets with all applicable information here.

 

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How do I get the spirolox into the pistons?

Simply pull the lox apart and spiral them into the groove. For more information on spirolox click here.

 

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What material does ROSS use to make the pistons?

ROSS uses 2618 T-61 aluminum in all of our pistons.

 

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Can ROSS make hypereutectic or cast pistons?

No. A hypereutectic piston is a cast piston; ROSS only manufactures forged pistons.

 

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Can ROSS make 2 cycle engine pistons?

No. Our material is only compatible with 4 cycle engines.

 

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Can ROSS work from a sample piston?

Absolutely! Please send your sample, along with our order form (fill-in PDF) to:

ROSS Racing Pistons -
625 S. Douglas -
El Segundo, CA 90245.

Your sample MUST be clean, all rings removed, all spirolox removed, and the rod pressed off the piston. Failure to do so will incur additional charges, and adds 2 weeks to the delivery time. We will not be responsible for breakage of your piston if we send it out to have the rod pressed off of your piston. Please add an additional 5 working days to our normal delivery time.

 

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I have a set of a competitor's pistons. Can ROSS rework them?

No. We will not do any reworking to any piston other than ROSS Racing Pistons.

 

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I need some more pistons, and I have the job card number. How many pistons do I have to order?

If the job card number begins with "8" or "9", it is a stocking piston and you can order as few as one. If the job card begins with any other number, it is a custom piston. The minimum number of custom pistons we make at any one time is four. Absolutely no exceptions!! Also please specify which cylinder numbers you want.

 

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How do I determine rights from lefts?

For Small Block Chevy pistons and Big and Small Block Chrysler pistons, cylinder numbers 1, 4, 5 and 8 are right intake pistons, and cylinder numbers 2, 3, 6 and 7 are Left Intake pistons. To determine the proper cylinder, turn the piston dome towards you (or on a flat top, turn the piston with the valve pocket eyebrows away from you, i.e. ^ not v) and advise us which side the intake valve pocket is on.

 

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I have a set of a competitor's pistons, and I just need 2 more. Can ROSS make them?

No. We will not manufacture replacement pistons to match other brands on lots of less than a full set.

 

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How do I return a set of stocking pistons?

You MUST be the original purchaser of the product. If you are not, you must go through the dealer you purchased your pistons from, and they will have to ask for return authorization. ROSS Racing Pistons will not accept any packages for return without prior authorization and issuance of an RGA number by ROSS Racing Pistons. Please call our tech department at 310.536.0100 for an RGA number. Our RGA is valid for 30 days only. A 15% restocking fee will be assessed and freight credit will not be allowed on any returned merchandise or refused shipments. Freight collect shipments will be refused. Returned merchandise must include a copy of the original invoice or invoice number and date and our RGA number must be written on top of the package. Credit will be issued after inspection and approval of the parts for resale. Pistons must be in "like-new" condition, or they will be returned freight COD, and no credit will be issued.

 

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How do I return a set of custom pistons?

Custom pistons are not returnable for refund or credit regardless of circumstances, unless you have submitted a written purchase order, and pistons do not meet the requirements of the written P.O.

 

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How much "lift" will my pistons take?

In general, the valve pocket depths will provide sufficient clearance for most flat-tappet and hydraulic roller camshafts. There are many variables that will affect piston to valve clearance. Please call our technical assistance department for more information.

 

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What kind of ring end gap should I run?

If you would like specific gap recommendations for your application, please call our technical assistance department for more information. To view our ring installation sheets click here.

 

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