Jump to content
SAU Community

Recommended Posts

hey guys

im in the works of planning a 25/34 build to go into my 34 GTT, im sourcing parts prices etc but one thing that im questioning is the neo head. Ive built a 25/30 for my 32 using a 33 series 2 head which i got the water gallery welded, and a external oil feed for the lifters is the neo head requiring the same work? im sure the water gallery has to be welded but is there anything different between a neo head opposed to the 33 head that needs to be addressed for this conversion??

thanks

Link to comment
https://www.sau.com.au/forums/topic/412621-rb2534/
Share on other sites

would it be worth using a 33 series 2 head? i assume the majority of the 34 wiring harness is the same as the 33?

i had a 25/30 in my 32 originally had a 25 in it, and when i got it tuned the tuners said it had a 34 wiring harness

Link to comment
https://www.sau.com.au/forums/topic/412621-rb2534/#findComment-6602374
Share on other sites

would it be worth using a 33 series 2 head? i assume the majority of the 34 wiring harness is the same as the 33?

i had a 25/30 in my 32 originally had a 25 in it, and when i got it tuned the tuners said it had a 34 wiring harness

34 head is far better, just allow for the 34 when choosing pistons etc.

Link to comment
https://www.sau.com.au/forums/topic/412621-rb2534/#findComment-6602518
Share on other sites

what do you mean by allow for the 34?

What Jonathon said - the Neo head has a smaller combustion chamber than the R33 so you need to take that into account when calculating your compression ratio. Should be fine with the extra capacity of the 3.4 block - Neo is the superior head. Look forward to seeing the result!
Link to comment
https://www.sau.com.au/forums/topic/412621-rb2534/#findComment-6603125
Share on other sites

The lifters will be fine. Just use the correct oil restrictors. We converted our r33 s2 head to solids and I made two 1.1mm restrictors using m8 grub screws. Has worked fine so far. This is on a spool rb34 stroker also.

As they said already you just need to cc your chambers and get the pistons to suit so your compression doesnt go sky high. Otherwise no worries!

Be prepared for a nice fat torque and power curve. From our old rb30 our whole power curve moved to the left by a good 1000rpm and we picked up something like 160hp more through the midrange. Makes the car so much nicer to drive.

Link to comment
https://www.sau.com.au/forums/topic/412621-rb2534/#findComment-6607090
Share on other sites

what is the approximate additional cost in block prep to fit the 34 crank in? the spool site mentions there is some minor modifications required to make it fit.

i'm looking at a 26/34 conversion into my 32 GTR down the track (when i get the $$ for it) was weighing up a 2.8 stroker but leaning towards going all out with the 34 since im more looking at low end torque and dont want to wait till 4.5k rpm for boost.

Link to comment
https://www.sau.com.au/forums/topic/412621-rb2534/#findComment-6608666
Share on other sites

ahhh ok that makes sense im getting a spool kit for my build, out of curiosity what did you set your compression ratio at?

thinking of using a JUN pump

Mine is a bargain basement build with stock pistons resulting in about 8.2:1 CR :/

As yours will be fully forged etc something well north of 9:1 or even more if you are going to run E85 would be good!

I have an N1 pump but don't limiter bash and have 7000 max rpm.

Jun sounds good - Tomei may be better but people swear by Nitto pumps - no experience of them myself!!

Link to comment
https://www.sau.com.au/forums/topic/412621-rb2534/#findComment-6608779
Share on other sites

what is the approximate additional cost in block prep to fit the 34 crank in? the spool site mentions there is some minor modifications required to make it fit.

i'm looking at a 26/34 conversion into my 32 GTR down the track (when i get the $$ for it) was weighing up a 2.8 stroker but leaning towards going all out with the 34 since im more looking at low end torque and dont want to wait till 4.5k rpm for boost.

The pictures on their site show a small amount ground away for the extra clearance needed for the 3.4 - looks like a very small job - less than 15min labour.

Go the 34 - I want to see more results!!

Link to comment
https://www.sau.com.au/forums/topic/412621-rb2534/#findComment-6608781
Share on other sites

The pictures on their site show a small amount ground away for the extra clearance needed for the 3.4 - looks like a very small job - less than 15min labour.

Go the 34 - I want to see more results!!

spool RB32 don't need any clearance and unlike the nitto RB32 stroker the spool on is a 3.2l
Link to comment
https://www.sau.com.au/forums/topic/412621-rb2534/#findComment-6608872
Share on other sites

spool RB32 don't need any clearance

So? The extra capacity of the 3.4 comes from a longer stroke. Longer stroke means a larger diameter crank, which naturally needs more room to spin around.... What's your point?

Link to comment
https://www.sau.com.au/forums/topic/412621-rb2534/#findComment-6609218
Share on other sites

So? The extra capacity of the 3.4 comes from a longer stroke. Longer stroke means a larger diameter crank, which naturally needs more room to spin around.... What's your point?

was just saying some people don't like machining the block for Clearance as it weakness the block a bit Edited by MRHD66
Link to comment
https://www.sau.com.au/forums/topic/412621-rb2534/#findComment-6609521
Share on other sites

It will be interesting to see more results, I've only ever come across the spool s15 dyno graph. It's a good thing. Is there any other 3.4L results you guy know of?

I like the idea of the 3.4, considering its really the same cost as going 2.8 from a rb26, obviously exept the mods to fit an rb 30 in your car.

What rpm are you looking to turn this to?

Link to comment
https://www.sau.com.au/forums/topic/412621-rb2534/#findComment-6611019
Share on other sites

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

    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
    • You haven't driven many modern cars then have you? Most of them have sfa steering feel with their stupid electric bullshit steering systems.
×
×
  • Create New...