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Having always liked long runner intakes , this has had my interest. 

The results look excellent.  What are your thoughts ?  

Suitable on a 1000hp(at crank setup) 

 

 3min mark for the back to back dyno test -->

https://www.facebook.com/RajabRacing/videos/6500898046628155

 

https://empireelite.com.au/RAJAB-RACING-RB26-INLET-MANIFOLD-p557351869

 

 

Edited by Butters
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https://www.sau.com.au/forums/topic/484722-rajab-long-runner-rb26-intake/
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17 hours ago, Butters said:

Having always liked long runner intakes , this has had my interest. 

The results look excellent.  What are your thoughts ?  

Suitable on a 1000hp(at crank setup) 

 

 3min mark for the back to back dyno test -->

https://www.facebook.com/RajabRacing/videos/6500898046628155

 

https://empireelite.com.au/RAJAB-RACING-RB26-INLET-MANIFOLD-p557351869

 

 

Interesting, I've suspected for a while that long runner is the way to go. Not sure how that packages though, it looks like it might be challenging to make everything fit.

Plus being 2 parts makes it viable to fit whilst in the car.

 

I have no doubt it will make more down low, just will it tap out around 800 hp.

The Rajab cars back in the day used to be the leaders but 650rwhp and 9 second VLs is no longer the upper end of power these days.

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  • 3 weeks later...

I run RB25DE inlet manifold on an RB25 (no VCT) with twin 2860-5s on E85 and it is more respo lnsive then generally the R32R33 GTRs with same turbo setups in same dyno. Whether it's cam timing or other things RB26 inlets keep pulling at 8,000rpm where I have found on two different setupa the long runners start fall over

 

To the point...I reckon I'll listen to a mate and try one of these on the spare motor

9 minutes ago, Roy said:

RB26 inlets keep pulling at 8,000rpm where I have found on two different setupa the long runners start fall over

It shouldn't be too surprising though. Regardless of the length differences and their effects on pulse tuning (if any meaningful ones exist), the 26 runners are quite a lot larger than the 25's. This plays well into the 25 keeping velocity higher at lower revs for a torque boost and paying the penalty with high flow losses at higher revs.

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