RB26dett intake on an RB20det??

[Karma240]

I have an rb20det. I have a full intake setup for an rb26dett. I will be going front mount soon and was wandering if anybody has used the rb26 intake manifold, spacer and individual throttle bodies on an rb20det.

thanks

Karma

[StricNyne]

its been done, very hard, i am gunna do it, i decided to do it, but im leaving for iraq, so it wont be for a while....http://forums.skylinesdownunder.co.nz/s ... ht=rb30det

[biglipzit]

from what i have read and heard already it will take lots and lots of fabrication. Very few people have ever completed it because it is just that hard to do. But if you can manage it and work it out then that would be nice. Only a little help in throttle response but the manifold position and outlet etc would be perfect for a FMIC. Goodluck.

[Karma240]

I dont understand what has to be fabricated though... the block ports should be the same right!?? . .. Can you mount the rb25 intake manifold up easier?? I need some help my car is going to the tuning shop next week and I have spent a ton of money on custom transmission with dual synchros and one peice drive shaft and hks fcon and blah blah blah... I need to do a front mount and the rb20 manifold sucks!!!!

[Shahee1]

I have a ATI procharger intercooler that flows nicely ... Plus with that setup my piping is minimized, which helps in reducing lag.

[JonPowell]

I dont understand what has to be fabricated though... the block ports should be the same right!??

Did you read the thread Stricnyne posted?

Since you OBVIOUSLY didn't, I will paste it here for you...

"With all the fabricated parts ready at hand, it took about 5 hours to do the switch over. It took another 3 hours to baseline and tweak for a good engine idle.

Parts and procedures involved would be..- 2 adaptor plates being used between the GTR plenum andthe RB20 head. One adaptor plate to match the RB20 portsand water jackets and another to match that of the GTR's. - The pipe coming off the thermo-stat would need to be cut, rotated and then re-welded to rid the interference problemwith the GTR plenum.- The the cold-start valve of the GTR cannot be at the bottomside of the GTR plenum because of interference. Look atthe posted picture, it shows that it now sits at the top-rear.- A vacuum canister has to be made to hold vacuum for the brakeservo.- The RB20 temperature sender sensor for the meter gauge wasused, this was because the temp reading was way too lowwhen the RB26 sensor was used, it could be that the sensorwas bad or it is not compatible. I also took no chances and changed the RB20 temperature sensor (the one that the ECU reads) too.- The TPS electrical connector on the GTR is not compatible with RB20 connector so the RB20 one was used instead.- Also did some plumbing work mainly for the water and air/vacuum hoses and also extensions to electrical wires due to the lack of reach.- The TPS, Cold-start valve and the AAC valve had to be baselinedand tweaked to attain a stable engine idle. Prior to this the engine was idling at 2.5krpm and could not be lowered, this isunderstandable because the RB26 and RB20 air intake requirements would be different and hence the call for totalbaseline. The 6-throttle positions were also re-balanced. "

That is what needs to be fabricated.

[Karma240]

no i did not read it because I didn't know where to find it so I will look because apparently there are pictures to go with it that may be helpful.. Thank you...

[Karma240]

where can i get the two adapters and how do i find the thread stricnyne?

[JonPowell]

its been done, very hard, i am gunna do it, i decided to do it, but im leaving for iraq, so it wont be for a while....http://forums.skylinesdownunder.co.nz/s ... ht=rb30det

[biglipzit]

In clickity form if you are lazy or still can't figure a url out lol

http://forums.skylinesdownunde...30det

[Karma240]

so does anyone know who or where to get the adapters from?

[JonPowell]

I can probably track a set down if you really want them, or you could just get a set machined.

Try Hashiriya on these boards, I think he was in Japan or is now...maybe he can help???

Email me if you want me to try...

[email protected]