Holset user thread

[Pat @ Pitt Soundworks]

And you're most certainly not on an equal length twin-scroll manifold mounted to a vr6.

[Quintin@R.A.I.]

And you're most certainly not on an equal length twin-scroll manifold mounted to a vr6.

oh you just had to rub it in huh?

[Pat @ Pitt Soundworks]

Don't worry, honey - you know I'm still in 4cyl land with you.. I'm just curious what the results are for the guy with the bigger motor.

[adaptorman]

they both spool the same as there both on 12cm t3 houseings , but i have to agree the hx40 coldside is nice ,but at 30psi the hx35 seems to die off , were the hx40 pulled clean , yet both pull fine to the limiter at 20/25psi , defo a nice upgrade
pics off the head/gasket

[Dave926]

Wtf happened there?

[obdONE]

[Quintin@R.A.I.]

^^^now dont you feel better!?

[adaptorman]

hi boost dave , nicely reflowed my head, gasket ill re weld it so isnt a problem and attempt more boost

[adaptorman]

something im unsure about here, as the turbo is ported , is ur manifold also a twin scroll, if it is how will the divider flow/seal correctly,

if ur just runing a t3 un divided manifold i carnt se how the turbo will get any extra air as the inside hasnt been touched

[adaptorman]

i also tryed these against the holset turbos

gt4088
holset hx40
kkk27 modifyed gt35 coldside
small switnzer

my home mofiyed gt40 came first
then kkk27 home mod
holset hx40
pics if needed

[Pat @ Pitt Soundworks]

something im unsure about here, as the turbo is ported , is ur manifold also a twin scroll, if it is how will the divider flow/seal correctly,

if ur just runing a t3 un divided manifold i carnt se how the turbo will get any extra air as the inside hasnt been touched

For undivided, it's to remove the flat spot so airflow will be less turbulant entering the turbine housing.


from a few pages back

[Pat @ Pitt Soundworks]

Did you figure out what caused the head gasket to pop?

[obdONE]

^^^now dont you feel better!?

Yes I do I'll post video by the end of the day.

My buddy was talking to someone who was running a 12cm hx35 on his 12v @ 17psi and put down 420whp. So, we're a bit concerned as I have no idea what spring is in my wg and my engine cannot handle that much power.

Thinking of doing a wg pressure test to see where we're at so that might be the only hold up to getting this on the road today.

[Quintin@R.A.I.]

Yes I do I'll post video by the end of the day.

My buddy was talking to someone who was running a 12cm hx35 on his 12v @ 17psi and put down 420whp. So, we're a bit concerned as I have no idea what spring is in my wg and my engine cannot handle that much power.

Thinking of doing a wg pressure test to see where we're at so that might be the only hold up to getting this on the road today.

um yes it can. Stock block VR running 10.80@130 all day on 20psi making 510whp. Has made TONS of passes on it.

[obdONE]

um yes it can. Stock block VR running 10.80@130 all day on 20psi making 510whp. Has made TONS of passes on it.

sounds scary

anyways, it's all put together and running like a champ. WG is set to 12psi, which is a good spot for me right now. pulls mean, but my reference is a supercharger, so... feels freaking amazing though, I'm already so in love. I'll get some vids up as soon as i can, but you guys all know the drill...

I plan to hit the rollers next weekend and see how it shakes down.

[PassatMrT]

So I'm interested, does anyone have any data on how a VGT would work on a 1.8T? Also, has anyone put any serious miles on one to see how the vanes would hold up on over the long run on a gasoline engine. I figure with a good W/M system, you can keep the EGT's around 1500F under boost. Maybe it's one of these too good to be true things, but at $250-600 for a 400+ WHP turbo that could hit full boost at 3000 RPM, I'd seriously consider trying one out.

[Dave926]

The van design ona holset is nothing like a garrett, as it has less moving parts and seems to be a better design. All the tsb's on the 6.7 cummins was due to ****ty programming/software by dodge that caused soot buildup and failure of thevanes.

Around page 5 or 6 on this thread there is a link to someone using a vgt on a 1.8t in another forum. I also posted a link to a user named aero on another forum using one of his dsm. I think he was seeing positive manifold pressure well below 3000 rpm and 22 psi just over 4000 rpm.

Adaptorman post up some pics of that gt40, i remember seeing that and was like wtf. Still pretty cool you took the initiative to do that

[adaptorman]

ive never had this happern before but was also about to blow over 2/5 clyinders, can only assume heat/air as it was blue , my issuise is u can buy mild steel head spacers and stainless head spacers ive never had a stainless one go , yet companys say they have heat issuises with stainless , ill not be useing a sh..te mild one again not recomended on high boosting vr engines

[adaptorman]

sounds scary

anyways, it's all put together and running like a champ. WG is set to 12psi, which is a good spot for me right now. pulls mean, but my reference is a supercharger, so... feels freaking amazing though, I'm already so in love. I'll get some vids up as soon as i can, but you guys all know the drill...

I plan to hit the rollers next weekend and see how it shakes down.

keep us posted ,, as i usely run 20psi daily in my mk1 golf 4wd,46mm wastegate,but mine dosent seem fast , unless its me just justed to it

[adaptorman]

decided to give mine a quick port out on the holset too

then as this manifold was a t4 decided to grind the 12mm flange out and make a twinscroll divider

as a fair amount of steel came out tbh ,, wheather it may make any differnce im unsure

[adaptorman]

The van design ona holset is nothing like a garrett, as it has less moving parts and seems to be a better design. All the tsb's on the 6.7 cummins was due to ****ty programming/software by dodge that caused soot buildup and failure of thevanes.

Around page 5 or 6 on this thread there is a link to someone using a vgt on a 1.8t in another forum. I also posted a link to a user named aero on another forum using one of his dsm. I think he was seeing positive manifold pressure well below 3000 rpm and 22 psi just over 4000 rpm.

Adaptorman post up some pics of that gt40, i remember seeing that and was like wtf. Still pretty cool you took the initiative to do that

dont laugh , but its the best boost powerd turbo ive ever used , insane

[Pat @ Pitt Soundworks]

the **** man? Was that stick welded?

[Dave926]

Adaptorman your a sick bastard....enough said. Props to you for having the balls to cut up a perfectly good turbo and make it how you want.

Patt you should look up adaptorman's build thread on his truck. His fab work, ingenuity and everything else is no joke. I think he is on engine #5 due to insistance on running 30psi on stock engines

I took my 16v out again today,unfortunately when the turbo starts going on full boil its leaning out. I really need to stop being lazy and install the dsm 450's so I can rip on it.

[newto20v]

i was gonna post those pix of his homemade twinscroll, but i forgot where they were.

and FYI, he also hand cut his own head spacer too

[adaptorman]

lol no mig welded ive had it glowing with no cracks or blowing issuises , spooled very well , with no surge ,,,

[adaptorman]

Adaptorman your a sick bastard....enough said. Props to you for having the balls to cut up a perfectly good turbo and make it how you want.

Patt you should look up adaptorman's build thread on his truck. His fab work, ingenuity and everything else is no joke. I think he is on engine #5 due to insistance on running 30psi on stock engines

I took my 16v out again today,unfortunately when the turbo starts going on full boil its leaning out. I really need to stop being lazy and install the dsm 450's so I can rip on it.

pmsl , was only a bit of fun idea tbh dave, but like most things seemed to work pritty well , ps dave little tip if ur runing learn on ur boost what fuel reg are you runing i.e 3bar, then add a 4bar , will give you extra fuel , (ie i run stock 3bar 560cc and fitted a 4 bar fuel reg which theres enoegh fuel for 640cc keeping afr at 11.5afr at 30psi ,or modify some injectors to suite,,, 4clyinder engines are more stable then vr6 lumps
ps if u fancy re welding it few remains ur welcome

[adaptorman]

i was gonna post those pix of his homemade twinscroll, but i forgot where they were.

and FYI, he also hand cut his own head spacer too

ive made a few ,inletmanifolds 12v x2 /24v x1/ x3 exhuast manifolds and yes chuffing buying headspacers just make one you mean this one

[Pat @ Pitt Soundworks]

That's awesome. I don't think I'd run my own head spacer - that takes balls that I don't have.

[Dave926]

I'm running stock 19lb injectors due to my laziness. I don't think a 4 bar will cut it lol.

So adaptorman how fast can you swap out a motor on your truck?

[adaptorman]

long as its flat/holes algine and use copper sealer you wount have a problem , as i removed my homemade 1/5mm spacer to drop compression to 2.5mm mild steel and it blow the spacer , cheep steels that companys sell , so ill refit my homemade one i know it holds

[adaptorman]

19lb erm there are a bit small , check which one u have fitted , or useing a riseing rate fuel reg , i have one kicking around in the garage ,u will find by removeing the vacum pipe ull have a solid 3bar , orpiped in around 2.5bar on idiol , if thats what u have fitted , bang a bigger one in ,, cheeper option ,,

[PassatMrT]

dont laugh , but its the best boost powerd turbo ive ever used , insane

Wa wa we wa, very nice, I like!!!

[Dave926]

19lb erm there are a bit small , check which one u have fitted , or useing a riseing rate fuel reg , i have one kicking around in the garage ,u will find by removeing the vacum pipe ull have a solid 3bar , orpiped in around 2.5bar on idiol , if thats what u have fitted , bang a bigger one in ,, cheeper option ,,

I have the bigger injectors just never installed them. I'm using digifant 1 on my car that I'm tuning myself, and since I've never tuned efi I figured starting with the stock injectors would be better, then install the 450cc injectors.

I was going to install them today but discovered my new/used/recently rebuilt alternator is junk, so tuning a car with crappy voltage is a bad idea.

Adaptorman do you have to re torque the head with a spacer after a few heat cycles?

[adaptorman]

hi dave whether its useing a spacer or not , i always re torque mine when engines up to tempture , i have a few pics of my holset hx35/40 upgrade too guys so ill add them in a bit

[adaptorman]

pics of my 12cm hx35 converted hx40 coldside
first remove hx35 houseing and compressor wheel

pic of both hx35/hx40 compressor houseings and wheels

then i slightly machinced inner lip so the hx40 compressor wheel will fit

fits a treat


heres a pic of a hx40 houseing with a hx35 compressor to show the size differce

notice differnce the hx35 8 blade compressor wheel on the top of the7 blade hx40 , differnert angle of the finsyet suposely flow better

just rewelded the head and strip clyinder head and re skim it ,