Rb20de Itb Build

[screamin']

Got the head back last week. It better go as good as it looks.

It's had 13hrs worth of porting done, valve seating, head plained, new heavy duty valve springs and cam followers.

The cams are new 280° to match the intakes.

We just have to setup the cams in the head and it's ready to go on for the test fitting of the itb's.

Hopefully the fabrication of these will be done in the next week or two.

The ports have had a lot of work done on them to change the size and entry angle of the port to the valves, should make a good difference there.

This week I have to sus out an ECU to run the thing.

[murrayis]

Check out the Adaptronic ecu, I am useing one on my build.. but its not NA but take alook anyway

[25GTV]

Id steer clear from the adaptronic. Great computer, so many options but unreliable drivers.

[screamin']

Billet alluminium flange made to mount the itb's:

[skyla]

So how long before the engine will be built and ready to race? have you made any decisions in regards to the ecu?

[GTS4WD]

oh man..

oh baby..

that so farkin hot!

Could I ask a rough price for the project?

Could you write up how much better the responce is? how much and where in the rev range the improvements where?

Edited September 3, 2008 by GTS4WD

[screamin']

Dunno Rach, just kinda doing it on the side. At the moment I'm waiting for some alloy tube to turn up for the runners, then it's a matter of getting it all tigged up.

Think I'm going to run a Link G3 with a tps and map.

You think thats hot, wait till I've got the trumpets on it, mmmmm.

Cost so far... NZ$300 for itb's and NZ$2,900 for the head and cam work (mates rates!)

My mate is doing the CNC machining, so I'll see if I can buy him out with beer.

[Eug]

can i hear this thing when it's done?? please?

[GTRsean]

can i hear this thing when it's done?? please?

Yep you gotta post up what she sounds like screaming past!!

[Hesh]

really interesting ..and soo much cheaper than the rb26 adaptaion i was looking at awhiles back

[ignuz]

Going to sound porn..

Go for a straight through system too imo for track days or w/e

EAR SHATTERING!

[battery]

hey mate just wondering did you consider an sr20 conversion?

im a big rb20 fan, but still i would be seriously considering an sr20.

not having a go at you just wondering what the reason behind it is.

[Nosmo]

Hey mate,

Nice work. Looking good.

I recently built an RB30DE using 25DE head from an R32 with a modified RB26 6 throttle inlet to fit. Throttle response is unbelievable! I find myself rolling off the power just so I can nail it again. Havent go mine fully tuned yet... Only tuned to 4000rpm. It currently makes 86kW at wheels at 3000rpm (10BTDC and a little rich) so I cant wait to unleash it!

Yours should be somthing along these lines too!! What compression did you end up with?

Again mate, awesome work!!

[screamin']

Cheers for the comments guys. I want to have it going for next season, so that's Novemberish.

Hopefully it sounds good, only 2ltrs though so hopefully I don't have to rev the rse off it to get the benifit out of the itb's.

SR20's sound like rse, I thought the world of rallying could do with the sweet RB sound (SR would be better for weight distribution)

Nosmo, what ecu and sensors are you running? I'm not sure of the compression, it's on a bit of paper somewhere. Kelfords were instructed to set the head up for the highest possible compression I can run on 98 octane. MSNZ is outlawing Avgas at the mo.

Edited September 11, 2008 by screamin'

[chrissso]

Awesome build, particularly the intake runners.

I can see this being adapted to a fabbed forward facing plenum for turbo use too.

Will be watching.

[screamin']

Haha, no plenum, and no turbo for this project.

[Nosmo]

I am using Nissan sensors with an Autronic SM4

[screamin']

ECU time...

What are your guys thoughts and experiances with Microtech LT12s ECU's?

A performance shop has recomended this to me and the price seems very fair, as long as it does what I want it to.

I need to read a Toyota TPS, aftermarket MAP sensor and do all the fuel and spark as per stanadard RB20.

http://www.microtechefi.com/microtech-prod...hp?product_id=5

[GTRsean]

Mate has one in his 300zx tt. Map sensor and tuned well should be sweet. Plug and play with loom now too.

[screamin']

Cool. Sounds like the LT12s comes with the MAP sensor going by what the supplier tells me, which will save me a few dollars. He's quoted NZ$1,650. Way cheaper that what I've been looking at previously.

That's why I'm a little bit sceptical.