Offroad-Express

yeah or you can fit a boost controller

Hi The housing is of a 2.5 skyline but all the internals have been modified ,had it done by a guy out my way called Steve Murch ,i just told him what i wanted and he built the turbo to suit ,We welded up the internal wastegate and went External as the internal ones tend to leak a bit (takes very little pressure to crack them open ) and running ext it boosts a lot quicker ,I should add its also intercooled and had the fuel pump mods done ,i regulate boost with a boost controler,Steve

I should also add if you want to keep it road legal then you have to vent the wastegate back to the exhaust ,its sounds bloody great venting it to the atmosphere but would exceed exaust noise regs

monstr wrote:Hi BeautGQ ,If you like drop me a pm and come around and check mine out ,im running a modified Skyline turbo Ext wastegate etc ,it will give you some idea of what sort of HP you can get out of these motors ..Steve

Where in the country are you? I want to see it too!!!!

Hi mate ,im in west Auck..Steve

hey steve cheers think ill take you up on that offer will pm you when im going to get a chance to come have a look. think im going to run external wastegate too so would be good to have a looksy at your set up.

Just been pondering this manifold and im wondering whether anyone has compared a rb25 top mount manifold(straight 6 nissan) to a td42 motor was wondering whether the inlets would be close enough to cut flange off and weld on a td42 flange with a little bending could be way stupid but just an idea seen as the rb25 manifolds are pretty cheap?

Arent the factory rb manifolds cast iron like most other factory manifolds?

sounds like nearly as much work as making one from scratch

Has anyone contacted the aussie companies which make aftermarket turbo kits for a manifold price?
Has anyone asked Nissan for a new manifold price?

Just in case you don't want to reinvent the wheel.

BEAUTGQ wrote:Just been pondering this manifold and im wondering whether anyone has compared a rb25 top mount manifold(straight 6 nissan) to a td42 motor was wondering whether the inlets would be close enough to cut flange off and weld on a td42 flange with a little bending could be way stupid but just an idea seen as the rb25 manifolds are pretty cheap?

no mate completely different.

if you have a look on trademe youll see the ones im talking about im might be new to this but not new enough to even think about modifying a cast manifold new factory ones are through the roof and dont perform all that well. andf the aussie ones that come in kits are also mainly cast from what ive seen and frieght just doesnt really make it worth while just thought if that worked it would be an easy way for a lot of people to do it cheaply

KiwiBacon wrote:Has anyone contacted the aussie companies which make aftermarket turbo kits for a manifold price?
Has anyone asked Nissan for a new manifold price?

Just in case you don't want to reinvent the wheel.

AU$800 for a Safari low-mount manifold via Diesel Don in Puke. Cast unit, log style etc.

For those chasing a more details for the TD05-H turbo...........

Compressor is 16G"small" - 1.83" inducer & 2.365" exducer, trim = (1.83/2.365)²x100 = 60, 310BHP @100% effic, A/R = 0.49.
Turbine is TD05H - 1.93" exducer & 2.20" inducer.

Compressor is 18G - 1.992" inducer & 2.680" exducer, trim = 55, 355BHP @ 100% effic
Turbine TD05H as above.

Compressor is 20G - 2.07" inducer & 2.68" exducer, trim = 60, 390BHP @ 100% effic.
Turbine TD05H as above.

GQTROL wrote:For those chasing a more details for the TD05-H turbo...........

Compressor is 16G"small" - 1.83" inducer & 2.365" exducer, trim = (1.83/2.365)²x100 = 60, 310BHP @100% effic, A/R = 0.49.
Turbine is TD05H - 1.93" exducer & 2.20" inducer.

Compressor is 18G - 1.992" inducer & 2.680" exducer, trim = 55, 355BHP @ 100% effic
Turbine TD05H as above.

Compressor is 20G - 2.07" inducer & 2.68" exducer, trim = 60, 390BHP @ 100% effic.
Turbine TD05H as above.

Any specs on the turbine housings? I suspect there'll be several with different A/R's for different applications. What numbering system does MHI use to denote A/R?

BEAUTGQ wrote:Just been pondering this manifold and im wondering whether anyone has compared a rb25 top mount manifold(straight 6 nissan) to a td42 motor was wondering whether the inlets would be close enough to cut flange off and weld on a td42 flange with a little bending could be way stupid but just an idea seen as the rb25 manifolds are pretty cheap?

Not sure that would work,good idear though

I would have to ask the flat mates to confirm but i think there are 3 sizes of td05, vr4's (older single turb) and evo 1 had the smaller, then evo 2 was next size up and evo 3 had the bigger compressor wheel. Usually have them lying all over the house and garage..

cheers for those pics did you just happen to have those manifolds lying around?

i reken that could be worth a go you wouldnt know how they fit in the engine bay would you? whether the distance out from the mounting point to turbo would fit, apparently if you fill the tube with sand before bending it bends quite well with out caving in.

only other thing is would the diameter of the tube be big enough for the td42? sorry these questions keep popping in my head

No need to stick just with nissan tube manifolds. Its a shame i no longer have a supra stainless manifold kicking round. I'll try find someone with one and get a measurement of the overall tube spacing length. Would be sweet if we managed to fluke it and found a manifold which only required a flange change.

-Nathan

yea well thats what i thought would be a way easier way of doing it just thought that manifold would be a good start seen as its a high mount which is what i want to do. but i suppose you can get high mount supra manifolds to unless theyre standard like that?

cheers

BEAUTGQ wrote:yea well thats what i thought would be a way easier way of doing it just thought that manifold would be a good start seen as its a high mount which is what i want to do. but i suppose you can get high mount supra manifolds to unless theyre standard like that?

cheers

2j and 1j would be a good place to start. Virtually ALL stainless single turbo manifolds are top mount for these engines. Factory they are low mount. I have imported 2j and 1j manifolds in from ebay before for as little as $100NZD. Quality varies -usually in the engines flange porting.. not an issue if you chop it off. There are some variations in design too- sometimes you can pay $50 more and get a manifold with a better/different turbo flange or wastegate setup.

In the early days the stainless tube manifolds used to crack but this seems to be no issue if there is ample bracing between turbo and engine flange.

I'll try find some measurements.

BEAUTGQ wrote:cheers for those pics did you just happen to have those manifolds lying around?

not mine, from a guy in Oz,as you can see the ports dont line up at all,you could try and cut/shut them to fit but the port size is smaller and different shape....square peg round hole dont work even a baby can till you that

so do you think that when they build a custom manifold they use oval or square/round tube for a td42 manifold mate? dont think so, a baby ay!

BEAUTGQ wrote:so do you think that when they build a custom manifold they use oval or square/round tube for a td42 manifold mate? dont think so, a baby ay!

Fair call

its a shame that none of the companys make a tube style manifold as I'm sure they would sell shit loads at a good price,that manifold in the pic was brought off E-bay for $180au, I'd be happy to pay $400-500 for that type of manifold if it fitted the TD42

All they do is use the correct tube size and swage the end into a square. Or just crush the tube in a vice

Ps. Ive stuck a call out there for 1j/2j and 7m exhaust manifold measurements. I dont think it'll take too long for stuff to get back.

cool cheers that sounds good looking forward to seeing if theirs anything like this out ther. hell yea if they made manifolds that look that good for that price theyd fly off the shelf!

does anyone know whether it would be better to get a td05 16 g big or small?

BEAUTGQ wrote:does anyone know whether it would be better to get a td05 16 g big or small?

Looking at the maps, I'd go for the small wheel.
It has a wider map (won't surge as easily), has the same max airflow and higher efficiency. The bigger wheel can do higher pressures but it's in a region you'd never use.

KiwiBacon wrote:

GQTROL wrote:For those chasing a more details for the TD05-H turbo...........

Compressor is 16G"small" - 1.83" inducer & 2.365" exducer, trim = (1.83/2.365)²x100 = 60, 310BHP @100% effic, A/R = 0.49.
Turbine is TD05H - 1.93" exducer & 2.20" inducer.

Compressor is 18G - 1.992" inducer & 2.680" exducer, trim = 55, 355BHP @ 100% effic
Turbine TD05H as above.

Compressor is 20G - 2.07" inducer & 2.68" exducer, trim = 60, 390BHP @ 100% effic.
Turbine TD05H as above.

Any specs on the turbine housings? I suspect there'll be several with different A/R's for different applications. What numbering system does MHI use to denote A/R?

Not in the info I have. Had to scratch around through my old files to find that lot above ^^. I'm pretty sure I posted it on the Patrol4x4 forum years ago, had a bit of a search but can't find it though.

BEAUTGQ wrote:does anyone know whether it would be better to get a td05 16 g big or small?

What fuel pump mods are you intending to do? If you're just going to wind up the fuel a touch, then go for the 16G "small".