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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.

itbs006mk5.jpg

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.

  • 1 month later...
  • 2 weeks later...

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 by GTS4WD

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. :D

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. :D

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!!

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 :P (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 by 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

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.

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