The World of Holset Turbo Charging

[Reno]

Bump





Asian Woman Wonders Why This Thread Has Not Been Stickied??

EdiT* HI :P
Modified by Reno at 2:36 PM 4/25/2008

[Biggamehit]

it is stickied... inside of the KA-T info thread.

[ripracer]

I'm having a little trouble figuring out the best turbo for me. Ive got an rb20 and want to get a hx30 but was having trouble finding info on them. Looking for 350 to the ground and this is a drift car. What do you guys think? I have poncams and all the other stuff to support.

[nelson8708]

it would be a lot easier to find a hy35. It will suit the rb well. They usually have a small turbine side (9cm) so you would have a wide power band good for drifting. You should still be able to reach your goal of 350whp as well.

[nelson8708]

At first glance i though this was a hx35 because of the compressor housing discharge no facing forward like most hx35's. But i am starting to think this is a hy35 instead. Even though the compressor housing is differnt, the turbine is very small for a hx (9cm i think) and the chra and turbine are held together with a v clamp. What holset is this?

I need to get the turbine off to weld the wastegate shut and i need to clock it anyways. I am having trouble getting the two to come apart. I let it sit in penatrating oil for a few hours and then attempted to seperate them with a chisel and hammer. Don't worry...i was barely tapping it. It didnt move at all. Tomorrow i plan on hitting it with the air hammer (lightly) unless anyone has a better idea.

p.s.Its not my turbo so believe me when i say i am being gentel (spelling?) with it.

-Thanks

[240 GTR]

that looks like an hy35 to me. i have one and yours looks pretty much identical to mine

[nelson8708]

cool...so its a Hy...any suggestions on how get the turbine off?

[240 GTR]

you said it has a 9cm^2 turbine housing right? yours looks identical to mine, except for the inlet. but mine has the v band clamp that holds the turbine to the chra.

mine was rusted together. i tried a lot of stuff, most of which are probably very wrong. what eventually worked for me was that i held the turbo by the comp. housing about an inch or 2 off of my work bench. then i wrapped the end of a hammer in a towel and hit the turbine housing with the hammer. it wasn't the "right" way or the best way to do it, but it was the only way i could get it off.

i hope that helps

[nelson8708]

^thanks....yeah i have spent about 20min trying to do it the right way. This will be the last resort but, from the way things look (rusty) i will probably do the same.

[Tofusamurai]

Anyone here running a Holset HX40 on a KA? I know it will be laggy, just curious as to how much. I know it flows 70lbs/min, and that is quite a lot. Any info regarding the HX40 will be greatly appreciated. Looking to run it at 1 bar till I get pistons and rods. Thanks a lot.

[Reno]

Well i asked this in the SR forum.......... I KNOW.....LOL

but here it goes

question how would a hx52 spool on a ka24de with a twin scroll setup? by 4800 rpm?

xD

[nelson8708]

Anyone here running a Holset HX40 on a KA? I know it will be laggy, just curious as to how much. I know it flows 70lbs/min, and that is quite a lot. Any info regarding the HX40 will be greatly appreciated. Looking to run it at 1 bar till I get pistons and rods. Thanks a lot.

The twins car had a hx40 on it. They held the stock block hp record for a while till cory took it. They were on 30psi and made a little over 520whp i believe. Search for it and you might find their video.

As far as a hx52 goes.....they are huge. A local honda guy had one on his built gsr and he hit boost around 6K. When boost hit....you better be holding on to something.

[Biggamehit]

damn coolness glad to see this thread still going. I just got another newer H1c for my 240 back home... here i japan of all places. I will be putting a hx40 on my rb25 very shortly.

[Reno]

Biggamehit why H1C over HX35??

[ka24monster]

cool...so its a Hy...any suggestions on how get the turbine off?

Add heat and use big channel lock pliers n twist ever so gently should come apart.. air hammer makes me cringe.
Modified by ka24monster at 3:31 PM 1/4/2009

[ka24monster]

Heres a shot of my progress

[Biggamehit]

Biggamehit why H1C over HX35??

this particular H1C has a bigger compressor. i have no need for the hx35. i got good results on my kA from the older smaller H1C also it was free lol. its bigger and better than the t28 on my current rb25

[Reno]

this particular H1C has a bigger compressor. i have no need for the hx35. i got good results on my kA from the older smaller H1C also it was free lol. its bigger and better than the t28 on my current rb25

what are the specs and would you ever consider a twin-scroll Mani?

[Biggamehit]

its a 21cm housing.

I am going to break it down and do the math to figure out the Trim and A/R

this partiuclar turbine is not twin scroll. However the H1C on my 240 is twin scroll.

Modified by Biggamehit at 12:11 PM 1/7/2009
Modified by Biggamehit at 12:11 PM 1/7/2009

[ka24monster]

What size external wastegates are you guys running with the hx35.. anyone run into problems using a Tial 38mm gate?
Modified by ka24monster at 9:16 PM 1/6/2009

[Biggamehit]

i run a Tiall 38mm

you only want to run a 44mm if you are seeking mega boost. there has been talks of the 44mm being good for guys such as myself who didn't exceed 15psi to prevent boost creep. I never had an issue with that with my 38mm.

whatever you do... you don't want to use the Wastegate that comes with your holset if you aquire a WHx35 etc etc etc

[ka24monster]

i run a Tiall 38mm

you only want to run a 44mm if you are seeking mega boost. there has been talks of the 44mm being good for guys such as myself who didn't exceed 15psi to prevent boost creep. I never had an issue with that with my 38mm.

whatever you do... you don't want to use the Wastegate that comes with your holset if you aquire a WHx35 etc etc etc

Yeah I scrapped the stock turbine housing due to internal cracks in the housing. and picked up a non gated housing, so the highest you took your boost was 15psi and didn't run into any problems? I was planning on taking it to 20psi at max just curious to know if anyone has experience boost creep around 20psi on a 38mm wg.

[ka24monster]

.

[Biggamehit]

my car was daily driven/drifted

I had to make a sacrifice somewhere. also with what i was tuning with honestly 1 bar was all that i suggest going to.

my setup

Performance

* 98 KA24DE ( motor number 5 ) * 95 KA modified intake manifold * 93 OBD1 electronics * Holset H1C turbo * JGS Tools Stage 1 Manifold * 3" V-band Custom heat wrapped Downpipe * dsm Bov * deatchwork 480cc injectors * 38mm Tail Wastegate * ssac fmic * N60 MAF * Hallman MBC * Walbro 255 pump * NGK copper plugs (gapped to .033) * Timing backed off 3 Degress * Emissions Deleted * No A/C * No Power Steering

Electronics

* Apex'i SafcI * Apex'i Rev/Speed Meter * Greddy Full Auto Timer * Bee-R Power Builder Rev Limiter * Aem Uego wideband * Faze water temp gauge * Faze oil pressure gauge * Faze boost/vac gauge

drove in many events and did well in all of them boosted for over 2 years now.. this setup is only about half a year or so old and was doing very well....

[nelson8708]

this setup is only about half a year or so old and was doing very well....

Was?

what happened? Did you sell it before you went over to JDM land?

[kentuckyslider]

Just got my (7blade) HX35 in for my SR20 and I will keep you guys informed on how it works out on my SR should have it on the dyno by the 1st of March. UPS dropped it and bent the inlet but I'm getting insurance and straightening it.

All of you KA guys with H1C's or HX40's should consider this housing over the huge 18cm2 and 21cm2 http://www.theturbotrader.com/...22_25

[kentuckyslider]

BIGGAMEHIT, you should really consider the turbine housing in the link above. It has enough flow for 650whp at 32psi on a HX40 on a 4g63 and will hit full spool 500-800rpm sooner on your KA or RB25. The only reason your spooling the 21cm2 housing is because of your displacement. It would be a beast of a drift car with that housing.

How much boost do you think I'll need from my HX35 to max out my tune at 450-475whp? I have 86.5/8.5-1 pistons with tomie 260 procams. There is a SR with stock cams making 350whp on a 1bar spring with the HX35 on the SR20RWD forum.

What do you rev limit the KA at? If I build another S13 it will be a KA-T. IMO, the SR is a great motor for 400whp in the S-chassis WITH STOCK INTERNALS, but if your going to build the bottom end and go for big power you might as well stick with the 2.4L. The head flows better and it spools a GT35 as fast as the SR spools a GT28.

[Razi]

Biggame, how did you slide your car around with no power steering?Converted it to a real manual rack?Must've been difficult.

[nelson8708]

How much boost do you think I'll need from my HX35 to max out my tune at 450-475whp? I have 86.5/8.5-1 pistons with tomie 260 procams. There is a SR with stock cams making 350whp on a 1bar spring with the HX35 on the SR20RWD forum.

<25psi

Its all in the tune though. If the tune was for a t28 (example) you would have to pull more timing than if you ran a T3/T4, so you would be missing out on some power. Even if the tune is for a smaller T2 turbo i dont think you will need more than 25psi. A local sr guy made 377whp on a Gt2871RS @ 22psi (turbo maxed) so with a bigger turbo i think around that boost level you will reach your goal.

[kentuckyslider]

That's about what I'm hoping for. I would say I'm close to 370whp with my cams and stock intake. I made the 345whp with stock cams, and intake. I will be running the hx35 with tomie 260's and a greddy intake. Cams and intake are usually good for a solid 10% power incease on the SR. So I'm thinking 20-22psi and I'll be out of fuel with my 72lbs injectors and the rom tune. JWT has suggested that I data log and send the ECU back to them for a reflash. Do you think it's worth the time?