Jump to content
SAU Community

Recommended Posts

Hi All,

My RB20DET plenum arrived yesterday so this weekend i'll be installing it. My question is that when I changed the exhaust manifold I found that i had a bunch of broken exhaust head studs. Am I in for any simular supprises with the intake side of the engine?

Cheers,

Ian

Edited by GTST4Newbie
Link to comment
https://www.sau.com.au/forums/topic/122967-installing-an-rb20det-plenum-done/
Share on other sites

Thanks guys. I'm still working on modifying the plenum to fit an additional 6 injectors so I can run 2 fuel rails. One with RB20 injectors and the staged set with a set of gtr 440cc injectors. The goal is to be able to get a very economical low end tune on the RB20 injectors but have the fuel for 25lb boost, and 400 Awhp.

I'll pics pics of the progress as it happens.

Cheers,

Ian

  • 2 weeks later...

Well its done..!

It took working on it on and off over 6 days to finish it properly. I had to re-work the water plumbing under the plenum, and also had to remove the hydraulic line from the clutch master cylinder to get it on the engine, but other than that it went on fairly easily.

I took the opportunity to do an oil and plug change, and installed a full flow oil system (cooler and remote filter) at the same time.

Detailing things as i went, the plenum is metalic blue with a lot of clear coats, fuel rail is modified with new 1/8th bsp fittings silver soldered onto it, and painted flat black. The throttle cable is off a R31 skyline, which is about 20cm longer. I also made a alloy throttle cable bracket.

I'll be painting the 4" intake piping the same colour. The rocker covers will be either polished or painted silver metalic, and i'll re-paint the coil cover satin black to finish detailing things.

As for how it works, well its still being tuned. Its certinaly no worst than the stock plenum was. Inside the plenum there is 6 50mm velocity stacks on each port, so it should be a little better in top end flow. It doesn't seem to have sacrificed any low end that i've noticed.

Attached are the before and after pictures...

Cheers,

Ian

post-26553-1152333118.jpg

post-26553-1152333251.jpg

post-26553-1152333278.jpg

post-26553-1152333304.jpg

Edited by GTST4Newbie

Rocker covers will be polished alloy or silver with a clear coat. Coil pack cover will be satin black. Intake pipe will be painted blue like the plenum.

I'll be running 25lb max once i get the 1600cc staged injector installed before the throttle body. Next upgrade is installation of the nismo gmax twin plate clutch i just scored. Hopefully that will happen next week.

Not so much looking for a specific power figure, though around 400hp at all 4 wheels would be nice. I'd like low 12's or better on the 1/4 mile in about 2 weeks...

Cheers,

Ian

Edited by GTST4Newbie

Made by stryder in taiwan. Was a bit of a bitch to install but its worth it now its installed.

Still tuning the car, and am running 1 bar boost with the gtr injectors in it again. All seems good so far.

I'm adding a 1600cc staged injector next weekend so that will allow 24lb and a final tune to around 350 or so hp at the wheels.

Adding a nismo twin plate clutch too some time later this week too...

1600/6 = 266cc per cylinder + a 440cc gtr injector= about 700cc per cylinder.

This means i'll be running all injectors at about 75% duty at the most at max rpm.

I'd maxed out the standard GTR 440cc injectors at 100% duty with a 12:1 AFR with 20lb boost with the last tune at 6500 rpm. More RPM would have meant it would have been around the 14-15:1 AFR at 7500 which would have been a melt down. Thus the addition of a staged injector.

Edited by GTST4Newbie

http://cgi.ebay.com/ebaymotors/Nissan-Skyl...sspagenameZWD2V

But I got mine for $399 USD + freight. Cost me about 550 AUD delivered, and they kindly declared the package as being worth $100 so no import duty or GST etc.

Nice... Good pricing...

What i did dig up is that it uses the standard runners... Damn half english explinations...

Is that true... What throttle body did u end up using?

Edit: I have sent an email to the seller requesting more info. Also they had rb20 and 26 manifold listed but no 25's so i have emailed about that too. Thanks for helping out mate.

did you do any back-to-back testing?

i.e. a run before the manifold was installed, and then again afterwards? would be interesting to see what (if any) difference it makes...

also, where do i find information on this R.I.P.S. manifold i keep hearing about both here and on SDU?

is it worth buying (i.e. are there any power gains) or is it more just the convenience of having the throttle body at the front of the manifold?

reason i ask is there's been results that show that with some manifolds, you will actually go backwards in power/response/flow...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • There are several aftermarket options available, from not-too-painful moneyhttps://justjap.com/collections/driveshafts-bearings/products/d-max-reinforced-replacement-rear-driveshaft-set-fits-nissan-s13-s14-s15-r32-r33-r34-c35 and  https://justjap.com/products/crank-motorsport-billet-rear-axles-fits-nissan-skyline-r33-gts-t-r34-gt-t?srsltid=AfmBOorQk4xkGUa98kO7v2ePLUiNt-HRrM2AwWNw9mbSIVE1ujBVwY__, all the way up to The Driveshaft Shop https://driveshaftshop.com/skyline-cv-axles/
    • Yeah based on old XRC5964S specs, it looks to be roughly GTX3576R sized? But this 5964S compressor will flow 90lb airflow somewhat similar to the compressors in both the GTX3584RS or G35-1050.. I fully expected the 0.64 rear A/R to choke up top - seems way too small from typical convention - but these are seemingly beneficial over the prior 0.82 results.. Be interesting to see if he comments on the EFR question in that thread - he mentioned in a prior video that BW EFR's were the "cats pajamas 10 years ago", but by the sounds of things all his kits have been using Xona for quite a while now.
    • Yeah it’s still got the oem manual gearbox and clutch, only kinda mods are a blow off valve, coil overs, and a aftermarket intercooler. Also had it for about 2 months now with a lovely midnight purple paint on it.
    • Yeeeppp, been following a lot of the testing on the latest Xona stuff and there are some mental results.  He also went over 1000hp @ 4 hubs on his Mainline with a XRE6364S (63mm) which was also well into the 20psi range before 4000rpm on a 2.5. Crazy stuff. Fwiw the XRE5964S is basically the modern equivalent of their old HTA3582 - would drive nicely enough on an RB25 or 26, but proven capable of a huge amount of power if you want to spicy with rpm tho even at sane boost levels will make stout numbers 
    • The axels in my R33 seem tired, and have a bit of play in them. I cannot find any new of course, not interested in buying used, but I am looking to see if anyone can identify some cross compatible axles. In the states I have seen suggested for S chassis the J30 axles, however for the skyline (as best I can tell) the lengths are about an inch off (2.5cm) on both sides. R33 my measure L 22" R 24.5" GPT L 22.5" 24.25" J30 L 23.5" 25.5"  so shaft length is probably an inch wider. Not sure if someone has another still remanufactured option besides the J30. I figured worst case I can buy a pair tear them down and swap the center shaft. My other option was reaching out to GSP to see if they cannot piece together a set, since the axle stubs are still manufactured, I wouldn't think it be that hard to find a shaft or make a shaft work. 
×
×
  • Create New...