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Rb26 Intake Manifold Onto Rb20det *success!*

migs

By migs,
in Engines & Forced Induction

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migs Enthusiast

migs

Posted
Posted

Just completed fitting the rb26 inlet manifold to our rb20det

The process was simple

Took just over 1 weekend to complete

*Cut rb20det runners

*Cut flanges off of rb26 manifold

*Aluminum weld them

*Weld aluminum flange to mount throttle body to the front of the plenum

*Cut and re-position water inlet

*Use porting tool to grind all uneven levels in welded runners (allot of porting is needed)

*Install throttle body

*Install stock rb26 aac valve setup

*Install manifold

*install fuel system

*Run new vacuum lines

*Rerun new intercooler piping

*Relocate bov

....thats about it

People said that i would of lost power

but all we got was good results :P

*The boost is building quicker

*The acceleration is way better now

*The throttle response is really great

*Less intercooler piping (about 4 feet or so less)

and no need to weld a flange to mount the aac valve, we used the stock rb26aac valave setup

* i really cant complaim about anything its a really great upgrade*

more pics will be posted soon

IMG_4421.jpg

migs Enthusiast

migs

Posted
  • Author
Posted

Someone asked me what was my supporting mods

its as follows

*Stock rb20 motor

*300zx 45v3 t3 turbo

*10-12 psi boost

*TurboXS boost controller

*Blitz bov

*Blitz LM 3" intercooler

*2.5 intercooler piping

*3" free flow stainless exaust

*Gear box rebuilt

*Upgraded ecu ( flashed\remapped )

*Fidanza 4.3 ceramic clutch kit

*NGK iridium spark plugs

*Walbro external fuel pump

*Runnin on castrol syntec

waxracing Experienced

waxracing

Posted
Posted

It will never work. Opps it does damn it .

Ha ha I always wonder why people pull the rb26 intake off and go to a single throttle body

You have done it the oppisite way and made more power good on you.

Roy Grand Master

Roy

Posted
Posted (edited)

Would have been great to see an in gear rolling start 40-60km/h, 40-80km/h, 40-100km/h times and a dyno. Did you get the ecu re-flashed? If not then can there really be that much of a difference if the things airflow characteristics didnt change enough to require a tune....or if it did....do you know what is different about the tune in the way fo fuelling and ignition?

Surprised its made such an obvious difference with the turbo and power you are running because there have been various posts with some positive and some negative...lol woudl love to get my head around the reasons :P

But good work on getting it all together and running to your satisfaction

Edited by Roy
Lonewolf1983 Enthusiast

Lonewolf1983

Posted
Posted
one you drive yout car every day and you do an upgrade you will fill the difference be it good or bad

The placebo effect can be very strong when you have put a lot of time and effort into a mod though.

Dyno is hard evidence, shame would have loved to have seen a before and after

discopotato03 Grand Master

discopotato03

Posted
Posted

I'm curious to know how you got the IAC/AAC system to work considering the log sits on top of the RB26's inner manifold section and has two steel tubes decending between two of the runners and connectiong up to the AAC/IAC chamber .

How ever you got it to work - well done .

A .

migs Enthusiast

migs

Posted
  • Author
Posted
I'm curious to know how you got the IAC/AAC system to work considering the log sits on top of the RB26's inner manifold section and has two steel tubes decending between two of the runners and connectiong up to the .

How ever you got it to work - well done .

A .

it was really easy

The 2 lines that run from the two steel tubes decending between the two RB26 runners to the AAC/IAC chamber are vacuum lines

so what i did was run the lines from the 2 metal hose fittings under the RB26 plenum to the AAC/IAC chamber

IMG_4510.jpg

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