rb26 bore question

Discuss the RB20, RB25 and RB26 series engines.
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HxC_Nismo
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im about to build my rb26 and i want to bore .20 over so would that be the 86.5 pistons or the 87 pistons?


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Coolwhip
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86.5

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HxC_Nismo
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thanks man i can always count on you man i am going to be doing some shopping on your site and get some parts since you helped me out alot in the past man.

gawdzilla
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.020" over is 86.5mm, .040" over is 87mm. did something happen to your motor or are you just doing a build? just curious.

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95-S14
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Are you going to get rid of the 2530 setup? If you are let me know.

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maryjane
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did a 87 bore

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HxC_Nismo
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gawdzilla wrote:.020" over is 86.5mm, .040" over is 87mm. did something happen to your motor or are you just doing a build? just curious.
No nothing happend except my 4th gear synchro took a crap but other then that my rb26 is a fighter man, i have yet to have any issues with my rb, im actually really impressed that i put out over 500rwhp with stock block and stock headgasket and head bolts lol. im just building mine and im going with a precision pt6765 t4 turbo with the billet wheel and ball bearing. im aiming for 850hp on race gas and around 650 on pump. i will deffinitly keep everyone posted with pics and etc. i already pulled my motor out yesterday.

i have someone coming down next sunday from kentucky thats suppose to buy my gt2530's, my mckinney down pipe, nismo fpr, and apexi d-jetro intakes. i still have to sell my tomei 600cc injectors, my broken rb25 trans with no bellhousing and needs 4th gear synchro minimum.

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Coolwhip
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SWEET, the billet Precision turbos are boss. Hit me up man!

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95-S14
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Im impressed. What mods did you have to make over 500whp. My RB26 is all stock and I want to make around 500whp with either the hks 2530 twins, or garret 2860 or 2871 twins.


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HxC_Nismo
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i had apexi power fc d-jetro, tomei 600cc injectors, nismo fpr, hks gt2530's @24 psi, mckinney down pipe, apexi gt spec exhaust, apexi d-jetro intakes, and power enterprise timing belt and thats just about it lol.

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HxC_Nismo
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Coolwhip wrote:SWEET, the billet Precision turbos are boss. Hit me up man!
will do man, im going to hit you up on the precision 1000cc injectors, the upgraded power steering preasure hose, oil filter sandwich plate and a couple other things, if you can price match some of your parts i would get alot from you bud.

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95-S14
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wow thats crazy.

Was this on pump 91 octane?

I'm really surprised that you didnt need bigger injectors to hit that number. I'm also surprised that you did this on stock cams. This is good new for me then haha.

I thought I would need atleast 740cc injectors and some 264 cams to get to that number on pump gas.

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HxC_Nismo
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it was on bp 93 octane fuel, when i tuned it on the dyno after we were done fuel tuning, we kept adding timing till it stopped making power then we droped it down 2 points and we were good. no knock or detonation.

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Coolwhip
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HxC_Nismo wrote:
will do man, im going to hit you up on the precision 1000cc injectors, the upgraded power steering preasure hose, oil filter sandwich plate and a couple other things, if you can price match some of your parts i would get alot from you bud.
got you covered, send me a list with all that you need and I'll get you rolling .

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HxC_Nismo
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will do man ill have money this sunday and ill try to email you the list monday or tuesday and see what you can do for me and ill buy from you ok man.


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