Turbo upgrade
- Peter and Sandra OKA 374
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ebay link here .
they also will fit in the 50mm round blanking plates in the dash if you cut carefully with a dremel or similar.
OKA 374 LT Van, converted to camper/motorhome,
400ah Lithiums, 1100w solar, diesel cooking heating and HWS,
Cummins 6BT, Allison 6 speed auto, Nissan transfer.
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- Peter and Sandra OKA 374
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Peter, thank you. I fixed the ebay link, they are fussy so I just use the normal website link function, not the ebay icon.
David
OKA 374 LT Van, converted to camper/motorhome,
400ah Lithiums, 1100w solar, diesel cooking heating and HWS,
Cummins 6BT, Allison 6 speed auto, Nissan transfer.
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- dandjcr
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Rick, I agree, the Auberins SYL-2813 has 2 independent digital displays, although it's a bit chunky looking, but there is still something alluring about analog displays for fast changing readings.Rick Whitworth wrote: I like to have separate read outs
Is that why you have one of each?
David
David and Janet Ribbans - Oka 148
Oka148 profile here.
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- Peter Davis
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Have just done about 6000km since installing Martyn's turbo. Some observations. Engine oil stayed like new until just over 5000km. It finally darkened after a day of driving in temperatures up to 40 deg. Have only added about half a cup of oil. EGT stays lower than before turbo swap, EGT seems to drop quicker after load removed. Truck accelerates from lower revs. It sucks more air than before. It holds longer on each gear up hills. Nicer to drive.
Sitting on 100 km/h, air con on, sometimes into quite strong head winds, over 6 tonnes getting 6.3 km/lt to 6.7 km/lt.
Currently on Sunshine coast, plan to head back up to northern Queensland next week. Dissappointingly haven't seen 1 Oka since leaving Melbourne.
Thankyou to Martyn for your hard work. One can appreciate the time that it would take trialling turbos to get it right.
Cheers
Peter D
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- Rick Whitworth
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Dave,dandjcr wrote: the Auberins SYL-2813 has 2 independent digital displays
Followed your link and if I were doing mine again, I would use one of these. They have all the functionality you need but best of all both gauges fit in 52mm hole minimising real estate on the dash which is a real issue. Both gauges have relay output and with the digital boost you have the advantage of not having to run an air line from the sender.
I had not seen these at the time I did mine. I did the VDO boost gauge separately some time ago before the upgrade and yes, chose it for compatibility with other guages and because I liked the moving needle!
Rick Whitworth:  OKA XT 149.    Digital Twin.   Loaded 4x4.
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- 210greg
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- mort
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I am hoping that is before the upgrade just to set a starting point.
good luck you will be so happy in the end
Martyn as always "its an OKA thing"
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- 210greg
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Thanks Greg
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- Rick Whitworth
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Have travelled 5000km since upgrade, mixture of highway and off roadOKADOC wrote: any figures yet on fuel economy
Overall average 17 l/100km
Lead foot on highway averaging 100km/hr (uphill and down hill plus some 110 km/hr) it goes up to 18
Best I could get was 16 on highway keeping max speed at 90 to 95.
Truck runs like a bird. Engine never goes over 84 deg C even in 40 deg day with aircon on full blast. No increase in egts in heat, Only slight drop in power at the top end in the heat.
...can't stop smiling
Rick Whitworth:  OKA XT 149.    Digital Twin.   Loaded 4x4.
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- 210greg
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- dandjcr
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On the other hand grrrrrr. I haven't been able to start my upgrade yet. I've got the turbo and Opti-Air system and a lot of plans. I just need the intercooler and lots of pipework and some quality time to make a start.
But it is getting closer...
David
David and Janet Ribbans - Oka 148
Oka148 profile here.
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- mort
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I had a ph call yesterday from someone complaining that you are going to loose your licence if you keep driving like a hoon.
I hear that the OKA was overtaking everything on the road and not going down hill but up and in 5th gear.
You and Dean will have to take it easy or it will be like those car chases in San Francisco where the cars become airborne at the top of the hills they are built to sustain the landings but the OKA isn't I have already tried that and it damages diff's.
Enjoy and keep resisting the dark side.
Martyn "its an OKA thing"
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- mort
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Martyn "its an OKA thing"
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- 210greg
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- mort
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Don't we just love sibling rivalry.You are lucky that you rushed into installing the turbo if you had delayed it would have cost big bucks and then who knows maybe for a few extra $ maybe a 6BT. Good luck.
Martyn (its an OKA thing)
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- Dean and Kaye Howells
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Is this level of inlet pressure, 23lb, sustainable on the Perkins ?
But taking practicality out of the issue, the aim here is to have the graph that beats Deans is it not ? So when you do yours remove the air cleaner outer and cover and keep cranking the boost up till you achieve 105 HP, record it and then back boost off to say 16-20 lb and replace the air cleaner etc and tell no one, especially Dean.
Motto, if at first you don't succeed ......................... cheat!
Deano
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- Peter and Carla #396
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- dandjcr
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I had to use a different fixing method since I can't access the rear panel due to motorhome stuff (shower wall, pipework etc). I mounted it on 2 "U" saddles underneath with a strap holding it down.
Now my attention is turning to the turbo and intercooler and my question for the fluid dynamicists amongst you all, is a 4 inch thick intercooler better than a 3 inch for the same fin area (450x300)?
I'm confused over air flow restriction (which would be less with a 4 inch), vs faster flow (which would allow less cooling time), vs less cooling air flow due to more thickness. Or doesn't it matter much for our application? Any advice? Both sizes are available.
David
David and Janet Ribbans - Oka 148
Oka148 profile here.
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- OKAPETE
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Pete.
Chaplain. Won x One Chaplaincy.
AM SAE-A. AAFRB.
Oka 383. In process.... Cummins 6bt. Allison 2500 6spd. LOMAX 3:1 205 T/case. Dana 80 F & R.
Oka 358. Van. Perkins. swift turbo intercooled. NP205 conversion. LSD F&R. Camper conversion in progress.
LIFE.....is keeping OKApied.
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- Dean and Kaye Howells
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Just something else to think about
Deano
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