RB26 Bore Question

Discuss the RB20, RB25 and RB26 series engines.
Nesquick
Posts: 393
Joined: Wed Oct 15, 2008 5:59 pm
Car: Rb26 Kouki Silvia

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so im building up my 26, and decided to bore it just for kicks., (and to add that lil extra hp )

im going to be buying these pistons and rods...http://cgi.ebay.com/ebaymotors...ories

just wondering how big of an over bore i should do... i dont want to crack my walls obviously lol

any input would be helpful.

thanks boys and gals

cheers


Joe
Posts: 6511
Joined: Sun Feb 09, 2003 8:29 pm
Location: Phoenix, AZ

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boring gains minimal horsepower.

boring an engine is mostly for repairing damaged walls. dont bother unless theres something wrong with your cylinders.

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rbs14kouki
Posts: 156
Joined: Mon Jun 18, 2007 12:29 pm
Car: rb27det s14 / sr20det s14

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x2 dont bore if you dont need to !!!

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AlmightyWez
Posts: 32
Joined: Sun Mar 08, 2009 12:16 pm
Car: 76 280Z
Contact:

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I wouldn't go more then 20 unless you absolutely have to.

jdmser
Posts: 716
Joined: Thu Oct 09, 2003 1:31 am
Car: duh

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Is this a race only motor? I noticed the pistons have a 7.9-8.25/1 compression ratio. That's a little on the low side for street use.

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GTRs13
Posts: 95
Joined: Mon Mar 23, 2009 10:46 am
Car: 89' S13 Coupe AWD RB20DET

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4g63's have a 7.8:1 C/R

They run around on the street all the time.

All it means is that you can cram more boost in there.


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