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535 big bore piston ring end gap EFI
Posted: Fri May 15, 2015 9:40 pm
by Albo
Hello,
I'm fitting a 535 big bore kit to my EFI classic.
I have a comprehensive workshop manual that states the Piston ring end gap for 1st 2nd and oil ring but this is for the 500 cc barrel.
I'm loathed to buy a GT continental manual, does any one know Max + Min gaps for the three rings on a 535 barrel?
Best regards.
535 big bore piston ring end gap EFI
Posted: Fri May 15, 2015 10:10 pm
by Beezabryan
The supplier will know
535 big bore piston ring end gap EFI
Posted: Sat May 16, 2015 9:54 am
by Blown265
G'day Albo
As mentioned above, the supplier is always the best source for clearances on their parts.
In addition however, the time honoured 'hotrod' rule is 4 - 6 thou per inch of bore (for the first and second rings). The clearance will vary depending on power level, head/block material, cooling (water or air), ring and piston type , power adders, etc etc,
If the manufacturers spec falls in line with this, you're good to proceed. If it doesn't, ask them why.
Regards
Paul
535 big bore piston ring end gap EFI
Posted: Sun May 17, 2015 6:27 pm
by Albo
Hi Paul,
Thanks for the comprehensive reply, I will contact Hitchocks tomorrow and post any findings for future reference.
Best regards
535 big bore piston ring end gap EFI
Posted: Fri May 22, 2015 7:22 pm
by Albo
Following on from further posts:
Piston ring end gap for Hitchcocks part No. 90224 A (535 cc Big bore piston)
0.26mm Min.
0.36mm Max.
No manufacturer recommendation for oil rings.
Best regards.