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Discussion Starter #1
So there have been NUMBEROUS thread made for the discussion of Vitara's P2W clearances, but what's the concensous on non-cast, forged pistons? specially SRP 9:1 20 overs? Checked 10 pages into the search engine, but too many Vitara threads to mention... Should I just run a Honda factory clearance @ 40 thousands to 16 thousands?

Any assistance on the topic will be appreciated!

Thx
 

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Check with SRP. Forged pistons need a larger clearance or they'll hit the cylinder wall.
 

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ycp vitaras are not forged pistons

i will be going with the high end of oem clearances myself
shooting for 200-250whp
 

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Discussion Starter #6
Got this info from JE today...

Piston to cylinder wall clearance
1. Piston diameter must be measured at gauge point, which, in most cases is .500" up from the bottom of skirt. (See fig. 1).
Dimensions listed are gauged at a temperature of 72 degrees fahrenheit. Note: aluminum expands and contracts with temperature variations.
2. Your pistons are manufactured from 4032 high silicon aluminum alloy.
3. Clearance is built into piston based upon finished bore for normal operating conditions. (See Table. 1).
4. Clearances listed below are minimum. Some applications such as supercharged, turbo, nitrous and endurance applications may require
additional clearance (.001-. 003"). Coldwater pickup marine applications may require an additional .002-.004".
Table 1 bore range min clearance.
Sport compact 2.500 to 3.625" .0022 to .0028"
Sport compact 3.626 to 3.999" .0025 to .0035"
SB applications 4.000 to 4.200" .0025 to .0035"
BB applications 4.200 to 4.600" .0035 to .0045"

So using this maybe a .004 P2W might be a good idea for my boosted block?
 
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