Outer Limits 4x4 Board

benny4x4 wrote:Hi all, I'm a little dispointed with my turbo set up .Fully rebuilt 1HZ deisel all turbo internals TD05H turbo from DTS is just not pulling down low like others do. Is there any secerts or light on this topic to help me out . I'v even looked into another turbo but just don't know what sort i.g t3, gt28, schwitzer and what a/r numbers are best suited to spool low 1000rpm till 3500rpm.

80's_delirious wrote:Hey Matt,

whats the a/r on your compressor housing?

80's_delirious wrote:Hey Matt,

whats the a/r on your compressor housing?

benny4x4 wrote:Hi all, I'm a little dispointed with my turbo set up .Fully rebuilt 1HZ deisel all turbo internals TD05H turbo from DTS is just not pulling down low like others do. Is there any secerts or light on this topic to help me out . I'v even looked into another turbo but just don't know what sort i.g t3, gt28, schwitzer and what a/r numbers are best suited to spool low 1000rpm till 3500rpm.

KiwiBacon wrote:The big difference between petrol and diesel turbocharging is exhaust heat. Because petrols run hotter exhaust they can spool bigger turbos for the same size engine.

Unfortunately I haven't worked out how to cross reference mitsubishi turbo size to garrett turbo size. But a T28 with a 0.64 A/R turbine housing would be a good starting point. I can't tell you how it will compare to your current model.

80's_delirious wrote:

benny4x4 wrote:Hi all, I'm a little dispointed with my turbo set up .Fully rebuilt 1HZ deisel all turbo internals TD05H turbo from DTS is just not pulling down low like others do. Is there any secerts or light on this topic to help me out . I'v even looked into another turbo but just don't know what sort i.g t3, gt28, schwitzer and what a/r numbers are best suited to spool low 1000rpm till 3500rpm.

you dont mention your exhaust. What have you done with it. the biggest difference on mine was from changing to a good free flowing exhaust. Turbo spooled lower, was more responsive right through the rev range and had better top end. win,win on the exhaust

benny4x4 wrote:

80's_delirious wrote:

benny4x4 wrote:Hi all, I'm a little dispointed with my turbo set up .Fully rebuilt 1HZ deisel all turbo internals TD05H turbo from DTS is just not pulling down low like others do. Is there any secerts or light on this topic to help me out . I'v even looked into another turbo but just don't know what sort i.g t3, gt28, schwitzer and what a/r numbers are best suited to spool low 1000rpm till 3500rpm.

you dont mention your exhaust. What have you done with it. the biggest difference on mine was from changing to a good free flowing exhaust. Turbo spooled lower, was more responsive right through the rev range and had better top end. win,win on the exhaust

I have full 3'mandrel bent with 3'dump no muffler just straight through

zagan wrote:Look up the air worx PDF for their turbo do the calcs for your motor then you'll have the base numbers to use with the compressor maps.

Then select the turbo based on the best compressor map for your numbers.

it's not too hard really, most turbos will be the same across different brands bar the name, after all there's really only 3 makers of turbos the rest are just turbo tuners.

KiwiBacon wrote:

zagan wrote:Look up the air worx PDF for their turbo do the calcs for your motor then you'll have the base numbers to use with the compressor maps.

Then select the turbo based on the best compressor map for your numbers.

it's not too hard really, most turbos will be the same across different brands bar the name, after all there's really only 3 makers of turbos the rest are just turbo tuners.

There are more than 3 turbo makers. Each makes thousands of different parts which can be assembled into millions of different turbochargers, each performing differently.
Good luck finding any two turbos from different makers that perform the same.

Benny, the compressor A/R doesn't matter much, you just get what you're given as you usually don't have a choice.
The T28's with the 0.64 A/R turbine (hot side) often have a 0.6 A/R compressor cover. I know mine does.
The T28 with the 0.86 A/R turbine also in my parts bin has a 0.8 A/R compressor cover.

80's_delirious wrote: My understanding (which is limited) is that the A/R of compressor compared to A/R of turbine will determine the performance characteristics of a turbo, at least to asome degree.

eg, there is a big garret turbo on ebay at the moment, compressor A/R .64 vs turbine A/R of 1.16, wouldnt something like this boost very high in the rev range due to large turbine housing? and how does the small compressor A/R affect its boost/airflow characteristics?

KiwiBacon wrote:

zagan wrote:Look up the air worx PDF for their turbo do the calcs for your motor then you'll have the base numbers to use with the compressor maps.

Then select the turbo based on the best compressor map for your numbers.

it's not too hard really, most turbos will be the same across different brands bar the name, after all there's really only 3 makers of turbos the rest are just turbo tuners.

There are more than 3 turbo makers. Each makes thousands of different parts which can be assembled into millions of different turbochargers, each performing differently.
Good luck finding any two turbos from different makers that perform the same.

Benny, the compressor A/R doesn't matter much, you just get what you're given as you usually don't have a choice.
The T28's with the 0.64 A/R turbine (hot side) often have a 0.6 A/R compressor cover. I know mine does.
The T28 with the 0.86 A/R turbine also in my parts bin has a 0.8 A/R compressor cover.

Dzltec wrote:You need to look at compressor maps, working out airflow needed from the engine. Different size compressore wheels, trims and turbine wheels all make it harder to match and find the right one.

Turbine a/r's are a tuning device. Some turbos may have up to 5 different housings. Turbine inlet pressure needs to be measured to find the right one as against how quickly it gets on boost.

Look at the turbobygarrett website, check out the tech features and then be prepared to try a couple.

Or you by one from someone who knows that already works to what you want.
I'l take a look at that thanks, Also what do you think about the TD05-H mitsubishi turbo's that DTS bolt onto the 80 series, All i could get out of them is that the rear exhaust is 10cm Not messured in a/r

Andy

zagan wrote:

KiwiBacon wrote:

zagan wrote:Look up the air worx PDF for their turbo do the calcs for your motor then you'll have the base numbers to use with the compressor maps.

Then select the turbo based on the best compressor map for your numbers.

it's not too hard really, most turbos will be the same across different brands bar the name, after all there's really only 3 makers of turbos the rest are just turbo tuners.

There are more than 3 turbo makers. Each makes thousands of different parts which can be assembled into millions of different turbochargers, each performing differently.
Good luck finding any two turbos from different makers that perform the same.

Benny, the compressor A/R doesn't matter much, you just get what you're given as you usually don't have a choice.
The T28's with the 0.64 A/R turbine (hot side) often have a 0.6 A/R compressor cover. I know mine does.
The T28 with the 0.86 A/R turbine also in my parts bin has a 0.8 A/R compressor cover.

It's airwerks turbos by borgwarner a german company which tune up IHI turbos look at their pdf catalog to get the base numbers you need to see what compessor map(turbo) suits your engine, a dyno is better but won't matter.

As for brands there's Garret, IHI (mitsubishi), and another brand UD (nissan trucks now sold off) had their own turbos but that's all I know, take a look around easy to find out.

The better known "brands" don't make their own turbos, sure they make parts but that's it.

HKS use garret turbos
Airwerks use IHI turbos

Most use garret because garret have around 75% of the turbo market.


As for comparing turbos across brands easy... look up the compessor maps but you'll need your base numbers other wise your just doing pot luck matching.