No one can
The 2H/12H-T/1HZ/1HD-T/1HD-FT Gturbo Alternative Tech Thread (4 Viewers)
- Thread starter ForealBoreal
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Rob do you recon you could do a 1200-3500 vid in 4th for us . Showing at least the speedo
Well 'im keen to see how Robs Procharge turbo performs especially from down low. I will give Procharge and UFI a call this week to find out more but i prefer to see and hear of proven results of people running there turbo's before i make the commitment.
Why dont we see any twin scroll turbo's with split pulse manifolds like what is used on the Dodge Cummins 6's surely it would help with low down response and drivability.
Why dont we see any twin scroll turbo's with split pulse manifolds like what is used on the Dodge Cummins 6's surely it would help with low down response and drivability.
I agree, wait until I get this on the dyno before committing to anything. It's funny you say that, there is a twin scroll setup in development as well. I've already put my hand up for test pilot duties for that as well. @Mcreight911 I'll try and get a video soon, just been ridiculously busy with work etc
We don't want excuses, we want videos 
mudgudgeon
Resident galah
twin scroll requires custom manifolds etc to work. it would be a full custom install.
so far the only really tried and proven options for these have been built on the ct26 platform which makes them a bolt in option.
bolt in is quicker, cheaper, and easier to reverse if it doesn't work out.
why is noone developing twin scroll or other options? there is not too many people here (definitely not me) who have a really solid understanding of what it takes to put together a workable combination, and then ave time and cash to go thorough testing and improving it.
the toyota diesel performance market is quite small. You've got Australia driving it, we have a relatively small population, in that, a fairly small number of people who want to hotrod their grocery getter, soccermom 4x4. North america has almost no diesel landcruisers, they are a novelty, not the norm. there just isn't a big enough market to develop a lot of options
mudgudgeon
Resident galah
yep, @gerg results look interesting, just need someone to experiment with one on a 1hd-t
A VNT option would be a great compromise in terms of effort required and performance between standard wastegate turbo and twin scroll. Surprised there isn't a path paved for that option yet...
mudgudgeon
Resident galah
so, . . . start paving!
That's an even bigger undertaking than twin scroll
Digibooster, digital turbo boost controller
Just need suitable turbo, N75 valve, and vacuum source. I mean, aside from that, what am I missing?
Just need suitable turbo, N75 valve, and vacuum source. I mean, aside from that, what am I missing?
So as far as building a 6cyl split manifold that is dead simple. It's the easiest one of all the engine types because of the naturally separated pulses. As far as you guys doing anything simple or cheap well......now that is quite subjective. You honestly will not let go of the ct26 platform and because of that you are very limited in your options. If I had a hdj80 in front of me I'm pretty sure I could figure something out for you but I don't like those engines much and have no intention of buying one so that's sort of the end of that. If anyone around me was willing to test on their engine I'm open the end of summer when my projects wind down.
Cheap as, grab yourself a vnt and start playing
The split setup I know of in development has moved away from the CT26 platform because it is so restrictive
Go and find a VNT for a 4L diesel. Not as easy as it sounds. Find a map for a vnt compressor. That is a lot harder than it sounds. Tune your vnt for proper performance without surge and without excess boost at part throttle. Now that is absolutely not as easy as it sounds. So build and fit a VNT turbo that is poorly matched to your engine and gives you poor performance. Now that is extremely easy to do.
A weirdly sassy response, but ok. I see this thread has moved past brainstorming, got it.
You asked what your missing. Sassy yes, sorry bout that, but it's not as easy as an Internet search my friend. Reverse engineering complicated technology is...well....complicated.
VNTs are a compromise between cost emissions and performance. Performance is the least important out of those as far as the accountants at the manufacturers are concerned.
Compounds for a high numbers or properly set up twin scrolls for everyday drivability are a much better idea, especially on something that never had a vnt. VNTs are also not as reliable when pushed to the limit, or even not pushed in some cases
Compounds for a high numbers or properly set up twin scrolls for everyday drivability are a much better idea, especially on something that never had a vnt. VNTs are also not as reliable when pushed to the limit, or even not pushed in some cases
- Thread starter
- #780
If you think Gerg was being a smart ass he speaks a lot of truth. Honestly for you look at what gturbo or UFI has to offer. You have to sit down and ask yourself what you want in terms of performance and if you are willing to spend that much to make the switch/supporting modifications to make it worth while.
If you want to blast 30lbs down something's throat you better look at your exhaust, snorkel, airbox and intercooler setup.
VNT would be the dream, compounds would be the dream but they complicate things. You could try and find a Borg Warner EFR to try and do the twin scroll route, or just stick with the known options.
Compromises for everything. Boils down to goals, money and complexity.
If you want to blast 30lbs down something's throat you better look at your exhaust, snorkel, airbox and intercooler setup.
VNT would be the dream, compounds would be the dream but they complicate things. You could try and find a Borg Warner EFR to try and do the twin scroll route, or just stick with the known options.
Compromises for everything. Boils down to goals, money and complexity.
