Rb20det Stroker Motor

[johan.p.g]

RB20 rods are the same length as rb25 and 26 little end pins or gudgen pins also the same dia only differance is the big ends are smaller in the 20 rods .I had all three measured up for my rebuild just b4 xmas

Rb26 rod on the right rb20 rod on the left

Cheers Peter

thanks that solves allot of problems but i was wondering if the cons are the same thickness. when i looked on ACLs website it sais that the bigends on a 20 are 16.1mm and on the 25/26 its 17.1mm i was wondering if this is the same at the top of the rod as i am planning 2 put the 20 cons into a 25/26/30 piston and dont want to have to pack it out

[legend01]

From our measurements they atr the same it just the bearing cap width thats differant

1st pic rb26 rod on the left ,2nd pic rb26 rod on the right ,bith rods number 1

cheers Peter

[johan.p.g]

thanks for that got all my research now. just need 2 start collecting the rest of the parts. iv been given a 25 block and have a spair 20 for the cons and crank all i need is a head and a set of pistons im bidding on a set of 26 as these will decrease the comp for the turbo otherwise it will b a set of 30s

[johan.p.g]

me again

i was at the libery 2dy n i looked up the vl comodore repair manual (dident have a skyline 1) and it said that the small end pin in a rb20 is 19mm and the rb30 has a 21mm

i was wandering if someone would be able 2 put a micrometer in a rb20 conrod and c what the internal diameter is

iv already tried going 2 part dealers and asking 2 c there catalougues but they seem 1 miss out this detail for the 20s

[Butters]

Doing a good job dude, really interested to see how it works out !!

I don't see why 500rwhp would be a problem with an rb23.

There a rb23/24 in Japan that runs low 10's, thats gotta be close to 500rwhp.

SR20's do 500rwhp to so its not a capacity thing. I think just a matter of getting the intake manifold and head to flow enough air.

Don't be too afraid to have a go at porting yourself. You sound like you have a fair idea. Porting is not the mystical beast a lot of people think it is.

Wish all the rb20 haters would shut up and leave this thread alone though ... Sure sure there is logic to do rb25/26 but why not be diffferent FFS !!

[r3240sx]

Doing a good job dude, really interested to see how it works out !!

I don't see why 500rwhp would be a problem with an rb23.

There a rb23/24 in Japan that runs low 10's, thats gotta be close to 500rwhp.

SR20's do 500rwhp to so its not a capacity thing. I think just a matter of getting the intake manifold and head to flow enough air.

Don't be too afraid to have a go at porting yourself. You sound like you have a fair idea. Porting is not the mystical beast a lot of people think it is.

Wish all the rb20 haters would shut up and leave this thread alone though ... Sure sure there is logic to do rb25/26 but why not be diffferent FFS !!

Right on, some inspiration!

My plans have changed a little for the near future.. As much as I'd still love to do this, the car is my daily driver atm.. I dont want to wait 6 months to drive because of parts on order.

For now I'm doing some bolt on power upgrades that will help in the future stroker/built motor, and in the present stock/reliable form.

Fitted my GTR cams - woot!

[johan.p.g]

Don't be too afraid to have a go at porting yourself. You sound like you have a fair idea. Porting is not the mystical beast a lot of people think it is.

can u give us some more detail on how exactly n where 2 grind it out

i found this is this what ur talkin about

http://www.chevyhiperformance.com/techarti...ting/index.html

Edited January 18, 2007 by johan.p.g

[legend01]

Check out this site I bought there deluxe porting tool kit and do my own heads comprehensive guide with it to

http://www.sa-motorsports.com/do-it-yourself.aspx

good luck

Cheers Peter

[johan.p.g]

thanks il giv that a read 2nt n practuice on 1 of me spair heads

im buyin the new head 2mo n also pickin up the block from a m8s place so im well into it now still need pistons though n im skint