Jump to content
The mkiv Supra Owners Club

Aristo - High Flow twin turbos


adi2009

Recommended Posts

In the summer of 2021 while the initial covid lockdowns were in place, I came across what I thought was a good deal on a 1999 Toyota Aristo Gen-2 and I ended up buying the car. With free time on my hands I begun dreaming up plans to make the car more powerful and my idea came into fruition once I realised that the stock turbos on the car were leaking oil quite badly. Having already built a single turbo (6466) Supra, I thought I would try a slightly different route with the Aristo and made the decision to go with a Stage 3 high flow sequential twin turbos from Glenn Munro of Munro Racing Turbochargers (Australia) I did a lot of research and heard mostly good things about his work, furthermore, he has also always been great in communication and has responded to my numerous questions regarding the high flow options. Will update this thread with the progress!

Turbo Specs:

  • Overhauled and high flowed with 46.5 mm Billet Compressor wheels (stock JDM twins 37mm)
  • Cropped inconel turbine wheels.
  • Enlarged wastegate valve(32mm) and large can heavy duty actuator (ct26) for better valve opening at lower Boost.
  • Controls boost well from 14psi.
  • Approximate output rating 375 rwhp - 430 rwhp (Based on 20-25 psi with a stock engine (unopened),with supporting mods and an average reading dyno)

270008192_4900398930018759_5905567100279585038_n.jpg

270010447_250648353806597_8973708735709383219_n.jpg

270203356_601429187602966_951250204392052942_n.jpg

Edited by adi2009
Added more information (see edit history)
  • Like 5
Link to comment
Share on other sites

Similar to the Supra, a common issue with cars of this age is the significant deterioration of the stock intercoolers. As soon as I noticed that my stock intercooler was in bad shape, I decided to fabricate a side mount intercooler using a Bell intercooler core. The core I chose is slightly larger in dimension to the OEM core and is rated to flow 1038 CFM (I don’t know what the OEM flows) and considering it is a bar and plate design I assume it should flow more. I've also redesigned the bottom pipe section of the intercooler to minimise the major restriction seen in the OEM intercooler. 

I decided against an FMIC as I wanted to keep the stock cooling system working well and wanted to use all the stock intercooler piping. Perhaps this may not be a major concern in the UK, however as I live in India, our weather is warm for a large part of the year (daytime temperature between 25-38 deg C) and as such I have experienced overheating in my Supra which has an FMIC

intercooler prep 1.jpeg

intercooler prep 2.jpeg

intercooler prep 3.jpeg

Intercooler 1.jpeg

intercooler 2.jpeg

intercooler 3.jpeg

intercooler 4.jpeg

intercooler 5.jpeg

intercooler 6.jpeg

intercooler 7.jpeg

Edited by adi2009 (see edit history)
  • Like 3
Link to comment
Share on other sites

22 hours ago, TuneR said:

Interesting, do those need a new ecu/fueling to get the most from them?

Yes indeed, considering the Aristo is an automatic, I decided to go with a Link Kurofune which is basically Link's G4+ platform ecu which plugs into the HKS F-con harness that is widely available for most of the JDM cars. I am running the Link in parallel to the stock ECU where the former will be controlling; fuel, ignition, VVTI, boost and the latter will control the auto box and sequential turbo operation (vsv's). The Kurofune seems to be a good option for such a setup as it has several Analog outputs which are basically 0-5v outputs that can be setup to emulate certain factory sensors which if removed may cause havoc with the stock ECU while running in parallel. I have used this for the stock; MAF, MAP and for the IAT sensor, I have just hard wired in a resistor as it is an NTC sensor. I had to modify some of the wiring harness for certain functions and unfortunately I did not document the process with very many pictures. Here are the only few pictures I have of it:

As for the fuelling, I made a mistake of selling a set of spare Power Enterprise 650cc drop-in injectors just before this project begun and I now need to figure out an alternate solution. It seems like the only option is to go for top feed injectors as genuine drop in injectors (PE / SARD / Denso)  650cc & 800cc are no longer available. I made the mistake of buying a set of 800cc 'drop-in' injectors from iperformance.racing which I was assured to be genuine Denso, however upon testing, it turned out that two of the injectors were faulty. So basically they are cheap Chinese rubbish which belong in the bin. 

For the fuel pump, I have gone with the Walbro GSS352G3 which should be plenty for my requirement. 

IMG-5715.jpg

IMG-5724 (1).jpg

Edited by adi2009
Added more information (see edit history)
  • Like 3
Link to comment
Share on other sites

  • 3 weeks later...

I just received the revised down pipe designed and made by Kurts jz customs which I will be pairing with the new turbo setup. This is supposed to help get a little more power out of the high flow turbos. This also has the valve that is necessary for sequential operation of the turbos. I believe these are designed to fit the Supra, and since this project is an Aristo, I assume I may have to make some modifications to this pipe. Will get some updates once they are installed. 

image_67175681.JPG

image_67200769.JPG

image_67153921.JPG

Edited by adi2009
Added more information (see edit history)
  • Like 2
Link to comment
Share on other sites

Seriously looking forward to the progress and results of these high flow turbos from Munro. I wanted to take a similar route with my vvti supra with their stage 4 or 5 kit I can't remember. 

Almost bit the bullet and ordered them after gathering all the supporting modifications such as the Syvecs ECU, fueling, cams, CW smic etc.

Only issue I was faced with was cooling and temps as I wanted 550whp as the end goal but it didnt seem realistically achievable to make that sort of power constantly. 

If I wasn't so set on my power goals and just needed a pair of twins rebuilt to make some extra power with no end goal then I definitely would have opted for a set from Munro. 

Link to comment
Share on other sites

15 hours ago, Rashed said:

Seriously looking forward to the progress and results of these high flow turbos from Munro. I wanted to take a similar route with my vvti supra with their stage 4 or 5 kit I can't remember. 

Almost bit the bullet and ordered them after gathering all the supporting modifications such as the Syvecs ECU, fueling, cams, CW smic etc.

Only issue I was faced with was cooling and temps as I wanted 550whp as the end goal but it didnt seem realistically achievable to make that sort of power constantly. 

If I wasn't so set on my power goals and just needed a pair of twins rebuilt to make some extra power with no end goal then I definitely would have opted for a set from Munro. 

I dont think there should have been an issue with cooling if you were going with a CW smic. Will keep you posted on the progress, however this is the stage 3 and is rated well below the stage 4 (now discontinued). 

Link to comment
Share on other sites

13 hours ago, Swampy442 said:

Tell me more about that downpipe!

The stock downpipe is made from segments of cast iron and this unit replaces the entire length. The unit seems to be well made using mild steel. It has a larger inner diameter as well as a larger valve, both of which significantly improve the flow of exhaust gases. Attaching a few pictures from Kurts jz customs; First picture is of it installed, second picture comparing the new valve and stock valve. 

86190434_2950377894992454_7883945249616166912_n.jpeg

96539852_2610227405915722_4247287816075083776_n.jpeg

Link to comment
Share on other sites

8 hours ago, Swampy442 said:

Youre on the Aristo Facebook page right? I cant seem to quote here but this is exactly what Ive been looking for

Yes, I am on the UK Aristo FB page, however, I haven't updated this build on there yet. What have you been looking for in particular, the downpipe or the high flow turbos?

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. You might also be interested in our Guidelines, Privacy Policy and Terms of Use.