What Is The Max Kw You Could Get Out Of An Hks 3240?

[600hp]

Hi guys I need to know real world experiences with this turbo as I want to pick up an extra 100hp over my 3037 setup i have now.

PJ made 380kw at the wheels with his 3037s so i would like to make around 440kw .

This figure would be with around 30psi on E85 though.

Any help about these turbos would be great.

Thanks

[TiTAN]

look at getting a GT3582R with a 1.06 rear. it should pull off 440rwkw with E85.

[600hp]

My manifold and exhaust pipe are designed for a HKS T25 flange.

If Garrett did make a bolt on solution i would think about it. if it had a T3 flange i would just buy a PTE 6262 billet and be done.

[discopotato03]

Those HKS spec "GT3240's" are a bit of an odd ball but in reality they are an altered spec Garrett GT3540R AKA GT3582R .

What they did was crop the GT35 turbine down to approximately GT32 turbine dimensions ie around 64mm major diameter and at 84 trim .

The compressor wheel is the same family as a GT3582R but its 82mm 54 trim insted of 82mm 56 trim . Same T04S 0.70 A/R comp housing .

HKS just bored (profile machined) their T25/T28 flanged GT30 turbine housings out to suit the innacurately dubbed "GT32" turbine .

I don't think theres anything stopping you getting a capable turbo machine shop reprofiling a Garrett GT30 turbine housing to suit its turbine , even an integral wastegate housing .

If it must have a T25/T28 mounting flange I'd say you'd have to start out with a HKS T25/T28 flanged turbine housing intended for a GT30 turbine meaning a GT30 housing off say a GT3037 .

Interesting area this , The full sized GT30 turbine is 60mm , the "GT32" about 64mm , the GT35 about 68mm so the "GT32" sort of fits inbetween the GT30 and GT35 .

I know for a fact that these "GT3240" turbos are still being made because HKS has them as an option for the current Evo 10 with a suitable custom turbine housing to suit .

If you did your research you can probably special order these turbos , minus the HKS turbine housing , from Garrett Japan for a Garrett price . Get someone here to supply and reprofile a Garrett GT30 turbine housing and have more capacity than a GT3076R and less lag than a GT3582R .

3240's have been around a long time so the exclusive rights with Garrett should bee long gone .

Have I started a bushfire , cheers Adrian .

LOL see if I can rat up its cartridge no ...

[discopotato03]

Possibly even better , I have a pic of a GT3240's ID tag on the lap top and it shows the turbochargers part number , 706451-14 .

That sounds about right as I have the GT3540R/GT3582R's part number as 706451-5 so in the family .

A .

[Wheezy]

Those HKS spec "GT3240's" are a bit of an odd ball but in reality they are an altered spec Garrett GT3540R AKA GT3582R .

What they did was crop the GT35 turbine down to approximately GT32 turbine dimensions ie around 64mm major diameter and at 84 trim .

The compressor wheel is the same family as a GT3582R but its 82mm 54 trim insted of 82mm 56 trim . Same T04S 0.70 A/R comp housing .

HKS just bored (profile machined) their T25/T28 flanged GT30 turbine housings out to suit the innacurately dubbed "GT32" turbine .

I don't think theres anything stopping you getting a capable turbo machine shop reprofiling a Garrett GT30 turbine housing to suit its turbine , even an integral wastegate housing .

If it must have a T25/T28 mounting flange I'd say you'd have to start out with a HKS T25/T28 flanged turbine housing intended for a GT30 turbine meaning a GT30 housing off say a GT3037 .

Interesting area this , The full sized GT30 turbine is 60mm , the "GT32" about 64mm , the GT35 about 68mm so the "GT32" sort of fits inbetween the GT30 and GT35 .

I know for a fact that these "GT3240" turbos are still being made because HKS has them as an option for the current Evo 10 with a suitable custom turbine housing to suit .

If you did your research you can probably special order these turbos , minus the HKS turbine housing , from Garrett Japan for a Garrett price . Get someone here to supply and reprofile a Garrett GT30 turbine housing and have more capacity than a GT3076R and less lag than a GT3582R .

3240's have been around a long time so the exclusive rights with Garrett should bee long gone .

Have I started a bushfire , cheers Adrian .

LOL see if I can rat up its cartridge no ...

That info if it is on the mark is gold!

[discopotato03]

Scratch that , those part numbers ARE the cartridge or CHRA ones .

To be on topic my HKS list rates their GT3240 at 580 PS . Up till recently AFAIK they only ever sold them in a reprofiled T25/28 flanged GT30 turbine housing in 0.87 A/R ratio .

I think currently they are making a flange adapter to syit the Evo 10s exhaust manifold which incorporates an external waste gate mount , the housing they option for the Evo 10 I believe bolts to that and is in 0.73 A/R .

Cheers A .

Edited January 20, 2010 by discopotato03

[zebra]

They have the HKS evo X in the current HPI rag, It shows the Evo spec 3240 and its exh housing is tiny, I looks tbh like it came off the standard turbo or a gt28xx.

Not much to go off i know, but I am reasonably certain that all the 3240s ive seen have tiny exhaust housing, I was looking at trying to get one at one stage because of the fact they should be in between the 3037 and 35r. but was turned off by the range (or lack thereof) turbine housings

[discopotato03]

The turbine housings HKS gets made are quite compact compared to Garrett GT30 ones . A lot of it is because they are generally T25/T28 flanged things and the outlet flange is smaller than Garretts GT30 housings .

All Garrett seems to be doing is boring GT30 turbine housings out for GT35 turbines (GT3582Rs) and since the cropped "GT32" turbine is larger than a GT30 one I reckon you can have the same done solving the lack of official turbine housings .

Easy fix using locally available GT30 housings with or without an integral wastegate .

A .

[600hp]

If you guys give HKS a call they will give you a full list of turbine housing options.

That is why my question is relating to the .96 housing

[discopotato03]

This is all I've ever seen of the HKS GT30 turbine housing range , these all have the GT25/GT28 sized mouting flange and bolt pattern . HKS optioned them on the GT2835 range in 84 and 90 T turbines , the GT3037 range , the GT3240 in 0.87 and more recently 0.73 A/R .

The HKS GT30 turbine housing A/R ratios are 0.61 0.73 0.87 1.01 and 1.12 .

I'm not sure what this 0.96 one you mention is , do you have details or pics ?

Cheers A .

[600hp]

I rang performance wholesale about a 3240 and I said I wanted a big turbine housing and they said they have a .96 for it.

I have a 3037s with a 1.12 on it and it has no lag.

Still would like some dyno sheets on this turbo.

Thanks

[discopotato03]

I think some years back I came across a thread about a HKS GT3240 on an Evolution Lancer , being a 4 cylinder and completly different configuration engine the dyno graph wouldn't tell you much anyway .

The bottom line is that a HKS GT3240's turbine is about half way between a GT30 and a GT35 turbine size wise .

The compressor is closer to the ball bearing GT35's one and it uses the GT3540R/GT3582R's exact same compressor housing . Its trim or inducer size is something like 2mm smaller than the GT35's comp wheel .

There isn't a lot of info floating around about these turbochargers , they were obviously designed to fill the area above the GT3037S in big turbine housing form . Both the GT3037 and the GT3240 go back quite some years and at the time I wouldn't think too many had the need for a 550+ horse power turbo with a T25/T28 mounting flange .

The level of tune on a 1.8-2.0L 4 would be pretty extreme and even more so in twin form on an RB26 .

The best guestimate I can give you on its power potential is a bit less than a GT3540R/GT3582R because its compressor is a smaller trim and its turbine is cropped to be smaller than the std GT35 84T one but larger than the GT30 84T turbine .

Its probably not silly to assume its response , all else being equal , is half way between a GT3037S and a GT3582R .

HKS reckons 470 and 580 PS which I think is conservative .

I personally think that they were running to the limit of the passage size you can get through the T25/T28 sized flange and that the larger T3 one would work better .

For the record what engine do you have and what exhaust manifold ? SR20DET ?

Cheers A .

[WARLORD]

just a quick qestion but would it not be cheaper to turn your 3037 into a 3240 ?

cos hks 3240 are about 3k

im asking cos i would not mind doing it.

Edited January 22, 2010 by WARLORD

[discopotato03]

Not economically possible . Both the turbine and compressor wheels are larger and the compressor housing and back plate/adapter ring are different .

If it were me I'd be inquiring through Garrett or GCG with the above mentioned cartridge number to see if its available . The 6 odd year exclusivity bisso would have long ago run out and you may be able to buy the 3240R and its compressor housing for similar money to the GT3582R ones .

Toss a locally available and re machined GT30 turbine housing on it and you'd have a turbo that looks like a GT3582R but is actually a "GT3240R"

A .

[600hp]

2.5L WRX time attack car on E85 with 3.5" into 4" exhaust.

600x300x100 trust gtr cooler, custom intercooler piping about 2.5 feet (total).

[SilverECR33]

I personally think that they were running to the limit of the passage size you can get through the T25/T28 sized flange and that the larger T3 one would work better .

"Have I started a bushfire , cheers Adrian ."

Talk about digging up old threads.

perhaps you might have, . Has anyone tried this combo yet?

Because upon checking you actually can order the HKS 3240 with a T3 flange. Perhaps this would be an option to those looking for the power of a 35R but with better response?

Live thread live..

[discopotato03]

Well personally given a choice a twin scroll with two external gates would give the best results I reckon on an EJ25 .

The four cylinder has a very different dynamic to a straight six and it literally revolves around the 4s flat plane crank vs the I6s 120 deg phased one .

Its a trade off of fewer larger cylinders vs more smaller ones with power strokes closer together .

I'm not a fan of flat fours even though I own an L Series with an EA82T . Both are so far apart across the banks exhaust port wise that it screws up the exhaust manifolding and cylinder scavaging so for best results they need twin scroll headers if anything more so than an inline four cylinder .

Having 2.5L to play with means more capacity for torque off boost but the cars going to be heavier as well than say a GC8 Impreza .

Best most seamless system is twin scroll because it allows the engine to make more torque off and once on boost .

I'm not going to ask why 440 Kw is the ask because I'd be more interested in how much torque you can get in the engine speed ranges you want to haul at . IMO the best it ever gets is torque just below which the driveline can withstand everywhere and that assumes traction isn't the limiting factor first .

Anyway that aside a GT3240 is a dated thing and a compromise even in its day . Cropping a turbine is never a great way to do it because it means you have a heavy hub (innertia) for the blade area .

Personally I'd look at what David Young is doing at FP with the HTA version of the GT3076R , I think Garrett may be on the wrong foot using the TO4E compressor housing on the GTX3076R and Robert must think the larger TO4S one port shrouded works better .

You could look into retro fitting a TO4S comp housing on your GT3076R/GT3037S though not sure about the port shrouding without machining and welding mods .

If your here in Aus you could speak to Mark at GTPumps because I think he has ears at FP an d may be able to built/modify a GT30 into a HTA version .

David Buschur I believe got quite high numbers from the 76HTA on on a Mitsy 4 which you can read about if you search Evolutionm.net .

A .

Edited June 16, 2012 by discopotato03