 Piston to Head Spec? |
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| Jetsetsurfshop |
 Nov 6 2015, 01:53 PM
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Senior Member  Group: Members Posts: 815 Joined: 7-April 11 From: Marco Island Florida Member No.: 12,907 Region Association: South East States  |
I'm in the process of ordering some custom pistons and my Dad and I were thinking there must be a preferred distance from piston to head for the best combustion. Any thoughts?
(Its a 4, not a 6) Thanks (IMG:style_emoticons/default/driving.gif) |
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| r_towle |
Nov 6 2015, 06:33 PM
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Custom Member Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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.040 is safe.
deck height will set your compression ratio. 8.5:1 to 9.5:1 is a safe range. A higher lift camshaft will require more of a deck height or valve pockets in the Pistons to avoid having the valves hit the piston. Too little deck height, and one good over rev will float the valves and they will hit the Pistons....not a good thing. As Stu said, go google this topic. Learn about what you are doing to make a good decision based upon what you are building.... Street motor, race motor, what type of power you want, in what part of the rpm range do you want that power.....all of this will help you decide on the camshaft and deck height. Rich |
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Posts in this topic
Jetsetsurfshop Piston to Head Spec? Nov 6 2015, 01:53 PM
WLD419 I'm running .032 , I've heard as little as... Nov 6 2015, 02:18 PM stugray Do some googling of "deck height".
It sh... Nov 6 2015, 02:20 PM Jetsetsurfshop I googled it. Found some info here and on Pelican.... Nov 6 2015, 06:52 PM
WLD419
Are concern started because the PO shaved the h... Nov 7 2015, 09:08 AM sean_v8_914 head chamber volume in CCs?
what is bore and strok... Nov 6 2015, 06:55 PM Jetsetsurfshop
head chamber volume in CCs?
what is bore and stro... Nov 6 2015, 06:58 PM r_towle You can order any pin height you require to get th... Nov 6 2015, 07:34 PM Racer Chris That's a small combustion chamber for such a d... Nov 7 2015, 06:11 AM Bleyseng What heads are those with a 49cc chamber? Nov 7 2015, 08:08 AM barefoot
What heads are those with a 49cc chamber?
Good t... Nov 13 2015, 05:46 AM Montreal914 On my 2056 D-Jet build, I used .040" deck and... Nov 7 2015, 09:08 AM stugray If they shaved the heads down to get the comb cham... Nov 7 2015, 11:48 AM Dave_Darling For illustrations of how fly-cutting the heads can... Nov 9 2015, 03:35 PM Jetsetsurfshop Ok, let me see if I can address everyone here.
Fi... Nov 9 2015, 04:03 PM Jetsetsurfshop Cant find a picture right now, I'll take one t... Nov 9 2015, 04:05 PM Jetsetsurfshop :driving: Nov 9 2015, 06:37 PM r_towle Ok,
So what is the question again? Nov 9 2015, 06:46 PM Racer Chris Find someone who can TIG weld that hole shut, grin... Nov 10 2015, 09:48 AM Jetsetsurfshop
Find someone who can TIG weld that hole shut, gri... Nov 10 2015, 04:55 PM stugray I read precisely 60ccs on the 2.0L heads which was... Nov 13 2015, 02:27 PM barefoot
I read precisely 60ccs on the 2.0L heads which wa... Nov 13 2015, 02:47 PM |
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