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147 JTDm 8v Hybrid turbo upgrade

16890 Views 76 Replies 10 Participants Last post by  JS JTD
Well after playing with most things on my car ive decided to upgrade the turbo, i was happy with the remap but as always you need a little more :) and before you say it yes id have been better off starting with a 16v 150bhp rather then the 8v but when i brought this car i had no real intention of doing anything other than wheels and some lowering springs but thx to this forum i now cant help myself...:cry:

So a few options came up, the choice i was going to go with was a plug and play gt2256v kit from JS JTD, but have decided to go with a 1756 hybrid less one off parts etc , the goal from this is the magic 200bhp which i should quite easily obtain, any more than this and i'll need to start looking at a bigger intercooler , better clutch etc so im trying not to go to far.

Here she is, a stage 2 hybrid from Adam Davidson at tdi turbos ,this wont go on unitll i have one final part a decat down pipe from JS tuning then it will get fitted and off to reddot for a remap
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Well, there is thread of Vic_O_O and his Grande Punto @250CV somewhere around. The same 8v multijet engine though.
 

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I belive the 147 1.9 JTDm 8V has the same alfa gearbox as 16V, C530 and not the GM M32 one. So stock clutch will hold upto ~360Nm, gearbox about ~425Nm. Differential is the weak point, consider Q2/Quaife upgrade for more torque. Then the DMF doesn't like a lowdown torque a much. You'll need to make a torque build up more gradual rather than jumpy.
 

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I think the later models had the same injectors as the 16v
No, they don't, as 16V injectors are mounted under different angle.

Not to thread steal or anything, but is there a major plus for the JTDM 8v versus the old jtd 8v?
As in, able to archieve greater numbers?

Will be watching your build! got a jtd 8v (unijet) myself, currently sitting at 165hp/330nm torque with a euro 4 jtdm 16v turbo, fmic, 3 bar map, downpipe and cat replacement pipe. that's with 2550mbar of boost and 77mg/inj. For now enough, but i want to be looking towards 180-185hp somewhere. But i'm affraid that wont be possible without another turbo.
You should get nearly to these HP figures and 360Nm with that turbo.
 

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squadratuning you said :confused: chmmm

yes, you can log those. There are main injection start, pilot injection start [deg], injection time and pilot injection time [ms] parametres in MES.
 

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Full decat greatly affects the exhaust backpressure and thus spool and EGT. Removing the main cat only is just a half work.
 

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Well, the power curve on the second graph is more flat (stronger in midrevs), but actually a bit lower (!?)
 
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