Holset turbo on FD3 (HX40-16cm)
 

I had a post going a while ago.. need to freshen it up a bit!! I seem to remember the guy's on here were running H1E or HX40 with like 19cm housings and some even up to 22cm housings..
What's the thoughts on the 16cm housing? I am only stock ported at the moment and proably likely to stay that way with this car..

Will the 16cm housing be big enough for the rotary or will it run out of puff at higher revs? I reckon it will spool pretty damn quick!


Cheers
Lee

Here is a thread I cound on a DSM forum... Hope it helps.
http://www.dsmtuners.com/forums/turb...sing-pics.html

Ohh yeah I just sold an HX35 with a 16cm housing I think. LOL Good turbos, 4bangers make really good power with them!

alot of guys over here in BK are runing holset turbos on there FD's and FC's and doing really really good with them. My best friend has one in his FC. RIDICULOUS!! I wanted one but right now i just dont have the money for a new turbo setup.

I'm running a H1E with a 22cm housing and its about perfect. However, I have race ported exhaust and a 1/2 bridge.. Spool is near instant (it will make 7 psi by 2k rpm in 4th) and power stays strong till redline. I would probably go with a 19cm for a stock-ported motor, the 16cm just seems a little too small for a rotary.

Thanks guys' for the feedback. I know you are running a 22cm 2a+ron! I remember from an old thread. which seems large for a stock motor. But just want to be sure the 19 will be prefect for me.. what sort of boost you running by the way? And what power you make?
Asiandude - i'll check that link later when I have more time. Thanks..

Goukid - Didn't know there was a big rx7 deal in Brooklyn NY?! Some of my folks live out there.. I love it. NY in general is great.. I need to get back over there soon! Where abouts do you live? I guess Brookyln is pretty big?!

Cheers
Lee

I think the 19cm will be just about perfect for a stock port, but if you already have a 16cm you could always just try it and swap it out later if it is not giving you what you are looking for.

I'm only running .6 bar (8.7psi) right now as that's the spring I have in there. I'm limited to that as I'm already out of injector running the 4x 1000cc's I have in there. At my fuel pressure they flow 1100 each and are running 92% duty cycle (their limit at 8k rpm) at a lambda of .81 (afr around 11.9). I haven't been to a dyno yet, but based on a conservative bsfc I should be between 460 and 496 flywheel which would put me around 370-400whp. It seems impossible to be making that kind of power at that pressure, but the car really does feel that fast... I'm working on adding in 2 more 1000's and should have plenty of injector until I decide I want to go E85..

im running a a WH1E a wastegated verison of the H1E with the wastegate welded up so i can run an external, and i love it. was a little bit of a pain to fit in there with the bigger wastegated turbine housing, i think its a 26cm IIRC. im on a really large streetport and the spool is pretty much instant like 2a+RoN said.
2a+RoN where did you find a 22cm non wastegated housing?

I got really lucky and found the turbo freshly rebuilt on ebay with the 22cm and the larger compressor wheel for $400.. I may eventually need to step up to the 26cm if I wanna go for more HP.

is your housing 4in?

What does the 16cm housing compare to A/R wise?

Thanks.

Chris

Holset housing size - Garrett approximate equivalent

9cm^2 - .48 A/R
12cm^2 - .63 A/R
16cm^2 - .83 A/R
18cm^2 - 1.00 A/R
22cm^2 - 1.15 A/R

I have gleaned this info from various web searches. I'm guessing it is reasonably accurate, considering the 12 cm^2 comes stock on the manual tranny Cummins engine Dodge Ram, and .63 A/R kind of makes sense for that application. I know the 20G Mitsu turbos used on rotaries have a 16 cm^2 housing (Greddy Rx-8 kit which you should be familiar with).

Arrgh!
Not the first time I have seen these figures or similar.. and I agree when going single on a rotary you would normally be looking around the 1.00a/r. but if the RX-8 kit is a 16cm equivalent housing I presume you could run a 16cm holset then?? just you might be limited at what power you would make.. Would it not be an improvememt on the stock twins?

Cheers
Lee

which cummins came with the T4 16cm turbo?

Or are they all T3?

all the Rams came with a T3 inlet (H1C/HX35). The T4 stuff was on heavier duty trucks.

Hi Guy's I am trying to further my quest to source a HX40 in the UK!!

Can someone please give the the 7 digit part number for the HX40 with T4 divided 19cm housing and preferably external wastegate. Also with V-band exhaust and inlet. I think there are different blade configrations so if that effects the part number which is best.. there is a 6,7 and 8 blade option if I have read correctly?
I would also like the same for a 16cm unioit.

Thank you
Lee

you may have to call a distributor, that is really specific info

half the people who run holsets just scrounge around ebay for them

I went to a distributor and that was the info they asked me for!! I was hoping someone had the plate on there Holset that they could read the numbers off?

Cheers
Lee

Check out these Holset UK based guys:

http://www.g-s-racing.com/products.html

This turbo looks very promising. Unfortunately there has not been a lot of rotary experience with this turbo. I eagerly await your results.

Funny you should post that! I have been in touch with these guys a month or so back to get a deal going. They are still trying to develop these units for petrol motors. I am hoping to get a deal sorted as I need a couple of turbo's and one for a friend.. Will let you know how it goes. I have just been trying to find out part numbers to cross reference in the mean-time.

Cheers
Lee

Had an H1E which is a older Hx40 variant, on my BMW. Spooled nice and was very durable. Recommended!

i was running an hx40 with a very small hotside on my dsm for a while, it was great.

next fd... maybe itll see an hx40 too.

Ive got an H1c with an 18.5cm turbine on my 2.0L 420a eclipse. It spools almost as fast as the 12cm I had on it before that.

Need more input on these on a rotary. I'm boosting my six port and i'm debating on wether scooping up a stock turbo and manifold or a egay manifold with a holset.

I've been advised that rotary egt's will eat holset turbine wheels alive. Haven't really seen any evidence of this in my searching. Some guy said his GT42r's turbine wheel was partially melted but also said he used anti lag a bit.....

That's my biggest fear. I plan on beating the dogshit out of mine VERY often and also would like to run a bee*r limiter so i need durability and peace of mind.

Those warning against high EGT's are probably referring to the newest batch of holsets with variable geometry.

Hmm.

I'll consider it an option to run an hx40/35 hybrid then. I want to try to get away from using a TII intake manifold on my six port if i can get way with it....... Custom manifold negates the need for it in terms of space.