Does anyone know if the owner of this car is on this forum??
http://www.youtube.com/watch?v=ZXdv1...84E0AB292122D6

If so please let me know.

Thank you
Lee

 

There is no video on that link..

 

Oh!!Try this one.

http://www.youtube.com/watch?v=ZXdv1afelEI

 

That car was built by a guy I know from sweden.. He built it for dragracing but the car is now sold to a friend of mine here in Norway without the engine.. So I'm sorry to tell you that this car is no longer alive with a 20b engine.

He is running the tuning company called garabedian racing in Sweden.


You will find him on this swedish rotary forum: www.wankelregistret.se

His nick name here is abiex

 

Thanks for the info. Maybe you can help anyway? All I wanted to know was what size exhaust housing the Holset turbo used an how it spooled? If it was for drag only I expect it is way bigger than I am thinking.. but would be interested to know anyway.

Thank you
Lee

 

I found him! Don't worry. I didn't realise you meat on here as in RX7club! I thought I recognised the username!

Cheers
Lee

 

He never got that car running fast on the strip. also he is one of those bad companys that import cars and then **** the new owners. including myself! beware!

 

Thank you. I am only after information on some parts if he can help.

Lee

 

wich parts are you interested in? maybe i can search some since i live in sweden as well would rather help one the right way than getting false info and blow your motor

 

Thank you for the offer Robzter.
This is the information I am trying to find out. I wanted to know what size exhaust housing the HX60 was using and roughly when it began to spool. I plan to run an HX52 on my 20B and I am trying to determine the best size exhaust housing for a street car. I am guessing around 22-26cm but trying to get some views from people who have run Holset on other cars. I ran one on my 13B and used a 19cm housing and it was good. on stock ports it had a little more lag than I would like but perfectly acceptable.
If you can help great!

Cheers
Lee

 

i dont think that exhaust housing that he ran would be optimal since he never even got into the 10 second mark. but either way i tried looking for some info but couldnt find any so i think the only way to know is to ask him himself. but just remember to take the info with a little ease :P.

 

Thank you for trying.. I have an idea for a starting point and with your info and maybe a bit more from somewhere else Hopefully I can get the right housing for sure!

Thank you
Lee

 

Hi Lee

I found this suddenly when I was checking the site

This punk *** robzter, Is bulling...

I see that you live in UK-Portsmouth then you know reworx ... Jeff and the boys.
Ask him about me and you will find who I am.

The mighty truth is that we do have cheap people overhere..and everybody is rotary master after reading two lines on the net.

robzters FD3S is from Uk... the guy never got a rotary before, and suddenly he starts to over boost and the engine kaboom...died!!! who the FU!K told him to overboost!!!!

Did I ever tell u about the EX.H size?....... I think you got it by PM.

Thanx!
Gabi

 

Hi Gabi,
Great to hear from you! Firstly if you sent me pm about the exhaust housing I did not receive it. It would be very helpful to have some advice about that and your experience with spool up and so on.

I have been in contact with Holset UK on and off for about 2 or 3 months trying to get information but even with the aftermarket support division it is very difficult. In fact just yesterday they have now given me contact details for a Holset distributor in Finland who they think may be able to give better advise than them!!
Anyway.. I do know Geff at Reworx very well. I will be sure to ask him about you. He has rebuilt my last engine (13B) and tuned my RX7 and currently is working on tuning my RB30 Nissan project. Next will be the 20B of course which is sitting in the workshop ready to be stripped!

 

If I dont remeber wrong... I used the smallest marine exhaust hosing the size is great... I dont have that engine anymore but I want to remember its the 26 housing... what number do you have on your housing?
When I boosted 22psi the EGP was about 18psi... this is better than great... the reason I stopped boosting was the fuel system was to small.

I am going to build a turbo hybrid... it will be parts from the HX60 and going to press them into an HX52 housings. the HX60 turbine axel and the pressure wheel is a bit to big, but if you do some mesurements then you will find that it will work you will need to resize the exhaust wheel... but thats ok. try to run your HX60 with a small housing first if you find it a bit slow then you can do this mod.... I will run the hybrid on a 13b PP... today I have a GT42RS but I think the HX52-60 will push more power at the top end.

The HX60 starts about 2500-3000rpm on a 20B but thats on the auto tranny with high converter slip..

I hope this info help you out.

/Gabi

 

Thank you for the info Gabi. have the HX52 at the moment not HX60. The exhaust housing I have is 16cm. very small actually.. This should be about equivalent to a 0.84 A/R from what I have researched. The 20B really needs about 1.05 minimum from the information I can find here? This is 19cm housing minimum? Your car was making a lot of power and big ports? so I can see it running the 26cm ok. Maybe too big for my 600bhp requirement street car! Very interesting though about your HX60-HX52 hybrid!
I am not sure about the relevance of you 18psi EGP?? is this exhaust gas pressure?? What does this mean? I have not really heard of people taking this measurement before?

Thank you
Lee

 

True > EGP = exhaust gas pressure....
The simple relevance of this measurement is how effecient the exhaust wheel/housing is.

When I run the HKS T51R KAI I had about 700-720hp with 1,8bar boost and 2,5bar EGP....

HKS turbo had 0.7 bar EGP and the HX60 had 0.3bar EGP.
In my world the HOLSET is superior turbo but the size matters

And also got about 40-50deg celsius lower EGT with HX60.

I made 584hp with the HX52 16ex. on a 4G63 engine stock ports. 272deg.cams.
That engine run for over 2 years and the owner drove the car like its stolen.
But one weekend the screw on the butterfly in the throttle house got lose and flew down to the cylinder and messed up everything.
IT wont work on a 20b
Run the 19 ex. housing and you will be happy with that one.
I had to push 2.6bar on the 4g63 to make that power and the EGP was almost 3bar.
But piston engine runs a litle colder.

/Gabi

 

Hi Gabi,
thanks for the reply again.. So yes I can see I guess this pressure reading is taking before the turbo so it means the back pressure to the engine? So better efficiency turbo less back pressure all good! I also like the difference in EGT you noticed with the Holset. Quite a significant amount!
Now I did think the 16cm was too small with the HX52 (I bought it with the intention of changing the housing!) but wondered if I could get around this using a good 60mm wastegate or maybe two which would vent to atmosphere? I think maybe not? Before I had this turbo I was guessing 22cm housing would be needed but I have read a lot since then and think you are probably just about spot on with 19cm. I managed to get some info from the Holset supplier in Finland and the equivalent A/R they gave me for the holset turbine housing size would workout pretty well with 19cm. However they did also say in their experience the Holset would flow 20% more than an equivalent size turbo so in theory you can use a smaller turbine housing than you need? So I need to find out now if I can get a 19cm housing to directly replace my 16cm one or if I need to also change the tubrine wheel and get the unit balanced?
What rpm did you have to runon the 4G to get boost? I know this particular Holset is very popular on the 4G setup for big power!

I love this HX52 unit with it's Billet wheel. a real nice piece of kit. As you point out the only problem with the Holset is it's size compared to Garret or somehting like that. but I think the HX52 is managable!

Thank you
Lee

 

Hoping you will pick this up Gabi. I think I have found a good turbo option from turbotekniikka in Finland. Maybe you know of them? It would be an HX50MFS wth 19cm housing. However at the moment they have trouble getting stock so I am looking at other options you seem to know a lot about Holset turbos? Do you happen to know if it is possible without a lot of complicated work to fit a 19cm turbine housing from an HX40 to an HX52 unit? and in the other case put a 16cm HX52 turbine housing on an HX40? I guess you would need to swap the turbine wheels as well but it depends if the shafts are the same size and how the housing is mounted?

Hope you can give me some advice.

Thank you
Lee

 

Hi There,
Thanks.. Hope I can get it all together! it's certainly one hell of a project to undertake!

Not sure what you mean by THT sorry??

Lee

 

Arrh.. Maybe that was the? Cost you mean?
Still waiting on final cost plus shipping to the UK.. Around £500 though I think..

Lee

 

That video is beast!