Hi, do any holset turbos come with v-band instead of t3 or t4 flange's?
which new ones [or only new one's?], and which ones i can find at a breakers?
also is there a link someone can post up showing holset turbos to there garrett equivilent's ?
like:
hx35 = GTxx
hx40 = GT
hx52=GT xx etc etc
cheers
v-band holset turbos? garrett + holset size comparison
Moderator: martauto
why do you need to see their equals?
You´ll have to look at their compressor maps and compare to garret compressor maps.
You´ll have to look at their compressor maps and compare to garret compressor maps.
just to make things easy ? i thought maybe the forum might have done this already?
i was mainly after the equivilent of
Garrett GT35 [0.8 and 1.0AR] , GT4088R [0.8A/R], GT42 [smallest version of gt42 1.0A/R)
i am yet to learn working out compressor maps ;)
i was mainly after the equivilent of
Garrett GT35 [0.8 and 1.0AR] , GT4088R [0.8A/R], GT42 [smallest version of gt42 1.0A/R)
i am yet to learn working out compressor maps ;)
Do you want to use a Garrett or Holset turbo on your car? If you plan to use a Garrett then detailed information on each of their turbo's are available here.
The GT42 is intended for use on 4.5 to 6.5 litre engine and is too big for your 3.5 litre M30! Even a GT40 is right on the upper limit of what you require. Bigger turbochargers are designed to flow a greater mass of air (as required by a larger capacity engine) and do not necessarily make more boost than a smaller turbocharger! Remember this while you are sitting on the line still waiting for you GT42 to spool up and the other guy has already finished. Ideally you should be looking at fitting a GT3776, but with a turbine A/R of 1.12 don't expect to use her as a daily driver, although the fact that this is a twin entry turbo (with a tubular header) will help reduce turbo lag somewhat. The GT3776 is also a journal bearing turbo and will cost you a lot less than you will pay for a similar ball bearing turbo.
If you plan to use a Holset you will not be able to use data obtained for a similar sized Garret turbocharger due to subtle differences in the design of the turbine and compressor wheels and housings. Even the Garret GT series cannot be compared to the identically sized old Garrett T series. If you insist on using data downloaded from Garrett - then fit a Garrett!
The best way to obtain data for a Holset turbo is through one of their authorised distibutors. Unfortunately, Holset do not make their compressor and turbine maps available online as Garrett do. However, some limited Holset data is available here
The GT42 is intended for use on 4.5 to 6.5 litre engine and is too big for your 3.5 litre M30! Even a GT40 is right on the upper limit of what you require. Bigger turbochargers are designed to flow a greater mass of air (as required by a larger capacity engine) and do not necessarily make more boost than a smaller turbocharger! Remember this while you are sitting on the line still waiting for you GT42 to spool up and the other guy has already finished. Ideally you should be looking at fitting a GT3776, but with a turbine A/R of 1.12 don't expect to use her as a daily driver, although the fact that this is a twin entry turbo (with a tubular header) will help reduce turbo lag somewhat. The GT3776 is also a journal bearing turbo and will cost you a lot less than you will pay for a similar ball bearing turbo.
If you plan to use a Holset you will not be able to use data obtained for a similar sized Garret turbocharger due to subtle differences in the design of the turbine and compressor wheels and housings. Even the Garret GT series cannot be compared to the identically sized old Garrett T series. If you insist on using data downloaded from Garrett - then fit a Garrett!
The best way to obtain data for a Holset turbo is through one of their authorised distibutors. Unfortunately, Holset do not make their compressor and turbine maps available online as Garrett do. However, some limited Holset data is available here
"It is amazing how many drivers, even at the Formula-1 level, think that brakes are for slowing the car down." - Mario Andretti
im using a gt42 size turbo [hks] on a 2.6L already, as long as you change gear often you stay in the powerband [rb26 8300rpm limit], 'drag-lag' with 1st gear can be overcome by using a Nitrous window switch, ie u get N20 to get you off the line then its not needed untill the next standing start.
it gets you off the line, spools the turbo [1st gear] and shuts off.
although this project e30 335i-turbo [holset] build is more just a fun car, i want a powerband of 3500rpm-4000rpm, on as much boost as a standard 3.5L can take reliably [say up to 10-20k miles lifespan before refreash/rebuild] and not sure of stock 3.5 12v bmw RPM limit???
i wanted to use a holset equivilent of the gt4088r on a standard 3.5L 12v engine, with stronger lower CR metal headgasket.
it gets you off the line, spools the turbo [1st gear] and shuts off.
although this project e30 335i-turbo [holset] build is more just a fun car, i want a powerband of 3500rpm-4000rpm, on as much boost as a standard 3.5L can take reliably [say up to 10-20k miles lifespan before refreash/rebuild] and not sure of stock 3.5 12v bmw RPM limit???
i wanted to use a holset equivilent of the gt4088r on a standard 3.5L 12v engine, with stronger lower CR metal headgasket.
But what is the use of the car?
a 500hp E30 is going to blow your mind and will walk most things.
See here.
M30´s run to about 500hp I´d say on stock internals.
MLS is not needed just ARP studs.
Are you saying you want the power band to come on then or to be that long?
This is a stock B34 engine running a unknown HX40(most likely a 8blade) at 14psi boost.
This could easily do more boost and run you 500hp with quite a strong powerband.
Same guy went on to run E85 fuel and regularly boost 30psi on this stock engine.
a 500hp E30 is going to blow your mind and will walk most things.
See here.
M30´s run to about 500hp I´d say on stock internals.
MLS is not needed just ARP studs.
Are you saying you want the power band to come on then or to be that long?
This is a stock B34 engine running a unknown HX40(most likely a 8blade) at 14psi boost.
This could easily do more boost and run you 500hp with quite a strong powerband.
Same guy went on to run E85 fuel and regularly boost 30psi on this stock engine.
the powerband to be that long, 3500 to 4000rpm,
so the turbo has spooled to max set boost and holds to redline with 3.5k to 4k rev powerband
i am guessing 3,5L 12v has 6500rpm rev limit standard? i see that graph goes to 7k rpm, on stock engine, no aftermarket head work/parts?
i would be happy with that dyno graph above but where it flatlines at 350bhp 4.5-7k , id like 400rwhp flatline/climbing power on stock engine , if possible.
so your saying i need the HX40 is best for my build? run at 1.4bar on 99 octane pump fuel sounds ok? e30 335-Turbo should make 400rwhp.
the car is just for fun, no specific build like drag or autocross/rally.
so the turbo has spooled to max set boost and holds to redline with 3.5k to 4k rev powerband
i am guessing 3,5L 12v has 6500rpm rev limit standard? i see that graph goes to 7k rpm, on stock engine, no aftermarket head work/parts?
i would be happy with that dyno graph above but where it flatlines at 350bhp 4.5-7k , id like 400rwhp flatline/climbing power on stock engine , if possible.
so your saying i need the HX40 is best for my build? run at 1.4bar on 99 octane pump fuel sounds ok? e30 335-Turbo should make 400rwhp.
the car is just for fun, no specific build like drag or autocross/rally.
I´m suggesting it based on what I have seen done with them on these particular engines.
And based on that dyno chart he was seeing boost when the dyno run started
as that´s 240lbs@wheel torque at 3k when peak torque before at the fly was 220lbs or so at about 4k.
A HX40 is going to do that just fine.
People have been running them to well over 500whp.
This car here
Is using a HX40 is a 2.7 M20 with higher spec cam. Put´s out 480whp@1.2bar boost on E85 fuel.
But he ran 430whp @ 1.3bar on Vpower(99oct) the year before.
Stock bottom end M20
And based on that dyno chart he was seeing boost when the dyno run started
as that´s 240lbs@wheel torque at 3k when peak torque before at the fly was 220lbs or so at about 4k.
A HX40 is going to do that just fine.
People have been running them to well over 500whp.
This car here
Is using a HX40 is a 2.7 M20 with higher spec cam. Put´s out 480whp@1.2bar boost on E85 fuel.
But he ran 430whp @ 1.3bar on Vpower(99oct) the year before.
Stock bottom end M20
I've been trying to do some reading on holset turbos but the information is tricky to get hold of.
I've been trying to find out which turbos came as factory equipment. The aim is to try and get hold of a hx35 as cheaply as I can(recently made reduntant but plenty of spare time and have always been borderline broke:) ). If it means I have to find a truck breakers and pull it off myself then so be it.
Is there such a guide available? e.g
Engine cc Manufacturer Turbo
Cummins 5.9 Leyland hx40
etc etc
I've been trying to find out which turbos came as factory equipment. The aim is to try and get hold of a hx35 as cheaply as I can(recently made reduntant but plenty of spare time and have always been borderline broke:) ). If it means I have to find a truck breakers and pull it off myself then so be it.
Is there such a guide available? e.g
Engine cc Manufacturer Turbo
Cummins 5.9 Leyland hx40
etc etc
Looks like my hours of surfing instead of sleeping have paid off, and I think I've answered my own question....
http://www.holset.co.uk/aftermarket/pic ... rogram.php
Now I've raised a few more
Can anyone explain the difference between the H1C and the HX35? and are there any other similar holset units? e.g H3B, which is one of a bunch of other weird and wonderful sounding turbo's I saw on the page listed above.
What does the 'W' in WH1C stand for? (does it denote water cooled?)
I've read about a different blade count (7? I'm tired and have a bad memory) on some of these turbo's which is supposed to help spool up etc. Any further info/reading available on this and how to identify with part numbers if possible.
Is there a way to identify which housing is fitted eg 18cm 12 cm through knowing the engine it came off or manufacturers specs etc? I've read that the number usually crops up on the turbo label, is it easily identifiable?
Thanks in advance and also apologies if this is taking the post off topic. Twist, if you would like me to start a new thread instead of asking here, let me know and I will do
http://www.holset.co.uk/aftermarket/pic ... rogram.php
Now I've raised a few more
Can anyone explain the difference between the H1C and the HX35? and are there any other similar holset units? e.g H3B, which is one of a bunch of other weird and wonderful sounding turbo's I saw on the page listed above.
What does the 'W' in WH1C stand for? (does it denote water cooled?)
I've read about a different blade count (7? I'm tired and have a bad memory) on some of these turbo's which is supposed to help spool up etc. Any further info/reading available on this and how to identify with part numbers if possible.
Is there a way to identify which housing is fitted eg 18cm 12 cm through knowing the engine it came off or manufacturers specs etc? I've read that the number usually crops up on the turbo label, is it easily identifiable?
Thanks in advance and also apologies if this is taking the post off topic. Twist, if you would like me to start a new thread instead of asking here, let me know and I will do
You cannot compare what you have to a GT42 simply because it is "of similar size". Turbo's do not work this way. To be even remotely comparable you would require (for both the turbine and compressor) same housing (same A/R), same exducer and inducer dimensions, same number of blades, same trim, same blade profile and curvature, same width, and (due to its effect upon the pumping efficiency of either) same bearings. This is the last time I am going to say this.twist wrote:im using a gt42 size turbo [hks] on a 2.6L already
i wanted to use a holset equivilent of the gt4088r on a standard 3.5L 12v engine, with stronger lower CR metal headgasket.
If you want the performance of a GT4088R then fit a GT4088R. You are not going to achieve the performance indicated by the GT4088R flow maps by fitting a similar sized Holset, especially if one is ball bearing and the other journal bearing! That's partly why the GT4088R costs so much.
If you insist on using a Holset (and nothing wrong with that) then fit an HX40 and use the HX40 compressor and turbine flow maps (contact Holset or your nearest agent for these) to determine the compatibilty of your chosen turbo with your application. If the HX40 is not big enough for you (goodness knows why) then repeat the above process for something in the range of HX50-55. However, as I said before, a bigger turbo doesn't mean you will make more boost (and therefore more HP). A bigger turbo is most often designed to flow a greater mass of air into a larger capacity engine, you only have to look at a compressor flow map to see this. Fitting a bigger turbo will most often get you the same peak performance as a smaller turbo (within reason, obviously), but just take longer (higher rpm) to get there.
At the very least, read the first few pages of the Garrett catalogue here to learn how to size a turbo to your engine and application.
"It is amazing how many drivers, even at the Formula-1 level, think that brakes are for slowing the car down." - Mario Andretti
Hi,
The W in the H1C means internal wastegate. I know because i have one fitted to my 2.5 M20. The internal wastegate is way too small and only comes off one port (split entry) so is useless. I used to get loads of boost creep so fitted an external one. That spools at about 3k and is a full boost about 3.5k.
I think the Hx35's is a newer and better design so spools slightly earlier. HAve a look at www.e30tech.com forums, those guys love there holsets!
The W in the H1C means internal wastegate. I know because i have one fitted to my 2.5 M20. The internal wastegate is way too small and only comes off one port (split entry) so is useless. I used to get loads of boost creep so fitted an external one. That spools at about 3k and is a full boost about 3.5k.
I think the Hx35's is a newer and better design so spools slightly earlier. HAve a look at www.e30tech.com forums, those guys love there holsets!