Toyota CT26 Upgrade - 13BT/12HT/1HDT/1HDFT
- Thread starter gbentink
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- #43
Trust me, you would..... 1.5Bar isnt alot of boost. Its a 50% increase roughly in stock (remember that at 0psi boost, you already have 14.7psi). You need the boost to keep the engine safe. It sounds counter intuitive to people used to petrol engines. In a gasser, more boost always means more power because you are working on a fixed A/F ratio - diesels vary alot. So more boost might mean more airflow and less power but cooler EGT's.
These engines are built for sustained 30psi and 700nm. Caveat here is cooling, so mechanically they are strong enough for much more than 30psi and 700nm (there is always engineering conservatism), but cooling wise would need work.
But given the fact that in vehicles, even towing up a mountain, you are more likely at 2000rpm full torque than 3800rpm like the design..... as a result you have alot less heat to get rid of and that makes it alot more acceptable.
These engines are built for sustained 30psi and 700nm. Caveat here is cooling, so mechanically they are strong enough for much more than 30psi and 700nm (there is always engineering conservatism), but cooling wise would need work.
But given the fact that in vehicles, even towing up a mountain, you are more likely at 2000rpm full torque than 3800rpm like the design..... as a result you have alot less heat to get rid of and that makes it alot more acceptable.
So how much for one of these turbos, I should have been the 1HD-FT guinea pig when you askedMind you I have the 5spd manual, so would still be the guinea pig.
I wouldn't want that kind of boost though!
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- #44
Hi Dougal, actually I am not sure entirely. With the shift kits the Arabs use them with 1000hp 4.5 gassers.....
I am more interested in the strength of the TC lockup clutch. I am not sure how much they can take before they slip.
I am more interested in the strength of the TC lockup clutch. I am not sure how much they can take before they slip.
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Might as well link to my thread describing my results with this turbo upgrade....
https://forum.ih8mud.com/diesel-tec...049-1hd-t-turbo-upgrade-installed-tested.html
https://forum.ih8mud.com/diesel-tec...049-1hd-t-turbo-upgrade-installed-tested.html
- Thread starter
- #46
EDIT: Just found out the lift pump wasnt working. Drives totally different, at least 180hp by feel of it. The owner may dyno it while I am away on holiday. If so, I will report the data.
OK, Regarding the promised 1HDFT Auto on 35's dyno, I couldnt get auto to play the game on the dyno - its the TPS sensor on the injector pump. I thought I would be really clever and take it off and preset the TPS position (to a point just befiore kickdown). End result = no lockup at all. I had 30 mins to sort it out but couldnt. This will be solved in a few weeks when I get back. Really I am very annoyed about it......
I have run out of time on the 1HDFT because tomorrow I go on vacation for 2 weeks with Wife and 4 Kids in Tow (and Bushtracker - see Offroad Caravan Hire in Perth | Bushtracker Hire) its yet another thing we do, but not my day job). So much to do to try and work a day job, tune a car , dyno a car and get ready for a holiday! Its my last big vacation for many months so will be head down and tail up when I get back!
So very sorry to make you wait. I can say though that we got a 24% power increase and ~40% torque increase over the previous GT2860 setup on the same 35" tyres. Thats without TC lockup - the old values ARE with TC lockup, so power really has gone up ~ 30-35%. What I want to do is show a stonking curve from 1400rpm, but unless the TC locks up, I cant do it. Stay tuned!
Ignore the hump - thats the TC locking up which I couldnt get to happen in the dyno yesterday with the CT26...... so it cost me probably 10hp.
OK, Regarding the promised 1HDFT Auto on 35's dyno, I couldnt get auto to play the game on the dyno - its the TPS sensor on the injector pump. I thought I would be really clever and take it off and preset the TPS position (to a point just befiore kickdown). End result = no lockup at all. I had 30 mins to sort it out but couldnt. This will be solved in a few weeks when I get back. Really I am very annoyed about it......
I have run out of time on the 1HDFT because tomorrow I go on vacation for 2 weeks with Wife and 4 Kids in Tow (and Bushtracker - see Offroad Caravan Hire in Perth | Bushtracker Hire) its yet another thing we do, but not my day job). So much to do to try and work a day job, tune a car , dyno a car and get ready for a holiday! Its my last big vacation for many months so will be head down and tail up when I get back!
So very sorry to make you wait. I can say though that we got a 24% power increase and ~40% torque increase over the previous GT2860 setup on the same 35" tyres. Thats without TC lockup - the old values ARE with TC lockup, so power really has gone up ~ 30-35%. What I want to do is show a stonking curve from 1400rpm, but unless the TC locks up, I cant do it. Stay tuned!
Ignore the hump - thats the TC locking up which I couldnt get to happen in the dyno yesterday with the CT26...... so it cost me probably 10hp.
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- Thread starter
- #48
Hi,
is it possible to have a translation of speed to rpm to get a better picture?
Honestly, apart from comparison to previous turbo and tune it is meaningless because it was on the torque converter. You can see it responds earlier and you can see tractive effort is higher and the power is higher.
No point plottinge against rpm due to being on stall converter. Outside of lockup it could probably get to 2200rpm on stall! So with rpm scale, it wont tell you much
When we solve the torque converter issue I will post in rpm from 1400 and up. Wont be for a few weeks.
This truck really hauls, but this dyno isnt huge numbers. I only posted it out of honesty - I said I was dynoing it, I did, and those are the numbers. And I am saying they will be much better soon and they they are not representative of the vehicles current performance and that there will be numbers to back that up soon.
I just dropped the car back to the owner tonight. Poor bloke works away so wont get to see it for another week!
Discovered the lift pump wasnt working on the last dyno either! I noticed in the video, it would be clean puff smoke then be clean etc, like it was getting a bit of air. So I checked the lift pump to find it wasnt working.
Boy does it perform differently with a Lift pump working - Adam if you are watching - Holley red I believe. The injector pump almost goes silent! Far smoother engine too. Now it actually goes heaps better, 180hp easy it feels like.
We will see some nice numbers from this engine soon.
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I'm getting ready to locate and install a Walbro as a pusher just downstream of the fuel tank. Sheldon just directed me to a source since my local shops don't seem to have them.
Not sure if I need it but it can't hurt and should make the stock pump's life a little easier. If there's a performance gain, all the better. I do suspect that I'm not getting as much fuel as I'm asking for at higher rpm.
So how much would it cost for you to modify a CT26?
I'm intrigued with the fuel pump idea, can you tell me what mdoel you are going to use and I'll source one here locally.
I thought that hooking a fuel pump up to a 1hz or 1hdt was useless as you can't put any more fuel into it than the injection pump will allow? If it will work I will hook one up for s***s and giggles.
Louis
I thought that hooking a fuel pump up to a 1hz or 1hdt was useless as you can't put any more fuel into it than the injection pump will allow? If it will work I will hook one up for s***s and giggles.
Louis
Hey Guys
Im the Lucky One with the Cruiser that Graeme has chosen,
I drove it today in the wet , Its Amzing cant keep traction on 35's
response is crazy 1200rpm its well and truly boosting 1400-4000rpm it pulls soo hard installing the front mount intercooler at the moment
The Pusher Pump is Facit red 5psi pump, A1 diesel injection who built my fuel pump said it would cause no damage having the 5psi pump and they use 3-5psi when they are testing the pump's on the bench
. the pump has stopped it from stalling on steep hills and quietened the injection pump right down smoother at idle,
Im the Lucky One with the Cruiser that Graeme has chosen,
I drove it today in the wet , Its Amzing cant keep traction on 35's
response is crazy 1200rpm its well and truly boosting 1400-4000rpm it pulls soo hard installing the front mount intercooler at the moment
The Pusher Pump is Facit red 5psi pump, A1 diesel injection who built my fuel pump said it would cause no damage having the 5psi pump and they use 3-5psi when they are testing the pump's on the bench
. the pump has stopped it from stalling on steep hills and quietened the injection pump right down smoother at idle,
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- #53
Dyno tested 80 series (1HDJ81) 1996 automatic on 35" tyres.
Intercooler installed :
189.2 hp @ wheels (141.1 kW @ wheels)
Pretty decent power for a turbo that holds 21psi @ 1400rpm.......
This car started with a GT2860 0.64 A/R with 128.5hp @ wheels
Then my low rpm performance turbo installed and tuned (no intercooler) went to 159.5hp @ wheels
Now after intercooler, no tune, 20psi boost, 189.2hp @ wheels.
35" tyres on all runs
3rd gear on auto on all runs
Estimated 600-650nm @ crank from 1500rpm up
*EDIT* I should say that peak torque is from about 1500rpm up, at 2500rpm for example it is about 560-580nm.
No smoke!
Intercooler installed :
189.2 hp @ wheels (141.1 kW @ wheels)
Pretty decent power for a turbo that holds 21psi @ 1400rpm.......
This car started with a GT2860 0.64 A/R with 128.5hp @ wheels
Then my low rpm performance turbo installed and tuned (no intercooler) went to 159.5hp @ wheels
Now after intercooler, no tune, 20psi boost, 189.2hp @ wheels.
35" tyres on all runs
3rd gear on auto on all runs
Estimated 600-650nm @ crank from 1500rpm up
*EDIT* I should say that peak torque is from about 1500rpm up, at 2500rpm for example it is about 560-580nm.
No smoke!
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Thats big power. I am assuming the GT power run was also in 3rd and on the same dyno? Have you got pricing available for these turbo's? Does it matter if you start with a 12HT CT26 or a 7MGTE turbo?
Those are great results Graeme!
Did you measure EGTs?
I have noticed on my own HDJ80 that EGTs can climb pretty high even if there is no visible smoke. Today I passed 740 degrees C during an uphill test run in 5th gear. I went up to about 140 km/h.
Did you measure EGTs?
I have noticed on my own HDJ80 that EGTs can climb pretty high even if there is no visible smoke. Today I passed 740 degrees C during an uphill test run in 5th gear. I went up to about 140 km/h.
740C with sustained full load is about perfect.
In my opinion for any robust direct injection diesel.
I now have one bolted to my 13BT, 23psi at ~2300rpm
EGT's are lower under acceleration, 0-100km/h I used to reach ~650c pre turbo, now I am stuggling to get past 600c. I am not sure but I think I might have reached the maximum fuel output from the pump, I have wound the maximum fuel screw in a further ~1.5 turns and noticed little difference to EGT's if any at all.
EGT's are lower under acceleration, 0-100km/h I used to reach ~650c pre turbo, now I am stuggling to get past 600c. I am not sure but I think I might have reached the maximum fuel output from the pump, I have wound the maximum fuel screw in a further ~1.5 turns and noticed little difference to EGT's if any at all.
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- #60
Great stuff. How is the throttle response now?
I am really sure you are out of fuel. With a good intercooler and fuel for 19:1 you should be able to push 21psi at 1750rpm when loaded back from say 2000rpm.
Your smoke should have cleaned up nicely, you would be very lean at 2300rpm, 23psi by the sound of it.
