holset is dieing time for upgrade !!

[StricNyne]

OK so i have been running a Holset Hx35 on my daily driven rb25 (27) after a couple dyno pulls ( i made a good amount over 400hp at roughly 19psi ) and i noticed the turbo has small noise when cold. i am going to rebuild it and sell it. SO i am now in the process of choosing another turbo upgrade. I am looking at a Holset Hx40 with the hx40v billet compressor wheel. How many other people outside of pirate and cj are running holsets ? anyone running a similar setup or have a dyno of them running similar turbo so i can have an idea of spool up. I have been super busy and i havent finished my research but anyone know who sells the holset billet wheel (aka the holset mfs)

[Yellow4g63]

PTE 6766!! your going 3.0 soon.

[Omni]

i want the holset sir hahahaha i will come take it off the manifold personally too hahaha

[Shocker]

PT6766 if your looking for 500whp+ PT6266 if your not.. the PT6266 will spool ~300-400 rpms sooner and almost have the same top end though. It matches/barley outperforms the older PT6765 (which is awesome btw). Both would be a great choice and are priced nicely. I wouldn't waste the money on a DBB unit either... the slightly quicker spook isn't worth the rebuild price IMO.

I myself am strongly considering a PT6766 for this winters upgrade over my old school cast 6765 unit.

[StricNyne]

i was looking at rebuilding my holset with hx40 compressor wheel and rebalancing but price will put me around 800 dollers

[Shocker]

i was looking at rebuilding my holset with hx40 compressor wheel and rebalancing but price will put me around 800 dollers

NO don't do that... A brand new state of the art tech 6266 is 900 from sound performance. With a .81 a/r and properly built 3.0 you will be full boost around 4k and make 500+ on pump.

[julio]

OK so i have been running a Holset Hx35 on my daily driven rb25 (27) after a couple dyno pulls ( i made a good amount over 400hp at roughly 19psi ) and i noticed the turbo has small noise when cold. i am going to rebuild it and sell it. SO i am now in the process of choosing another turbo upgrade. I am looking at a Holset Hx40 with the hx40v billet compressor wheel. How many other people outside of pirate and cj are running holsets ? anyone running a similar setup or have a dyno of them running similar turbo so i can have an idea of spool up. I have been super busy and i havent finished my research but anyone know who sells the holset billet wheel (aka the holset mfs)

Build is listed under RBBA thread but: Built RB26, billet HX40 (7 blade). Boost creeping from 16psi to 19psi:

[StricNyne]

i took shocker advice lol got JB 6266

[Shocker]

i took shocker advice lol got JB 6266

Hell yeah! Now I just need to pony up the dough and get myself one. Your gonna enjoy it, especially on a 3 liter.

[julio]

Anybody know why the SP Precision turbos come with a 66mm exducer turbine wheel other than the normal 65mm unit?

[Shocker]

Anybody know why the SP Precision turbos come with a 66mm exducer turbine wheel other than the normal 65mm unit?

Yeah its their newest vane technology, 65 is no more. It's also the inducer measurement.

[julio]

Right right, I always get exducer/inducer nomenclature mixed up with the turbine since we are almost always talking about inducer size these days. I saw some pics of the blades, very impressed by how much smaller the vanes/hub were compared to the 65mm unit. I also saw some people saying they were titanium like the BW EFR series. Any truth to that?

[StricNyne]

i wanted the EFR but i heard its HUGE,i am looking foward to the precision !!!!

[RRRRB]

i think the 6766 will be going on my car in due time... debating trying to do the rb26 head swap

[StricNyne]

head swap on what block ? and i am hoping to make 550 on new setup with 2.7 block with meth, just crashed car this morning though, hit a curb took out my FLCA, and Tension rod i hope not my tierod

[RRRRB]

RB25 block

[StricNyne]

hmmm how r u going to try and do this ?

[RRRRB]

shouldnt be that difficult, vct block off and eliminate the front external oil drain.. Im planning on using the 11mm RB25 head studs like people do on the rb30's, shouldnt be an issue at my power level... the rest of it is pretty much plug an play.. ill figure it out not my first engine build

I normally wouldnt bother but i got the head and intake setup for really cheap, and since ive built the current motor i regret not doing head work and clearance modifcations for larger cams on the 25 head, not to mention ill get solid lifter and a better intake manifold setup

[StricNyne]

hmmm i got as built 25 block now i wouldnt mind doing this but i cant afford the down time to figure the bits out

[Shocker]

shouldnt be that difficult, vct block off and eliminate the front external oil drain.. Im planning on using the 11mm RB25 head studs like people do on the rb30's, shouldnt be an issue at my power level... the rest of it is pretty much plug an play.. ill figure it out not my first engine build

I normally wouldnt bother but i got the head and intake setup for really cheap, and since ive built the current motor i regret not doing head work and clearance modifcations for larger cams on the 25 head, not to mention ill get solid lifter and a better intake manifold setup

11mm studs won't be an issue period, rips RB30s don't even use them.

[RRRRB]

shouldnt be that difficult, vct block off and eliminate the front external oil drain.. Im planning on using the 11mm RB25 head studs like people do on the rb30's, shouldnt be an issue at my power level... the rest of it is pretty much plug an play.. ill figure it out not my first engine build

I normally wouldnt bother but i got the head and intake setup for really cheap, and since ive built the current motor i regret not doing head work and clearance modifcations for larger cams on the 25 head, not to mention ill get solid lifter and a better intake manifold setup

11mm studs won't be an issue period, rips RB30s don't even use them.

Yeah i didnt think it would be an issue

My only gripe about doing this is the current setup has about 8k miles on it with power ranging from 400-close to 500whp id guess and it doesnt miss a beat its been a super reliable turn key build from day one, just debating weather or not i need to tear apart a perfectly good working setup...id like some more power though, decisions decisions

[StricNyne]

main rb26 advantage is solid lifters and cam options and slightly hetter head flow so they say

[RRRRB]

The heads flow about the same from what ive read, however stock for stock the rb26 has bigger cams, and if im gonna make good power on pump gas it will need to be ported and have a decent sized cam, which means the 25 head has to be removed for modifications, so might as well go 26 head and have solid lifters, is the way im looking at it