Turbo upgrade, which one.

[R.O.R-2.0]

hillfolk told me a friend of his tried compounding a 1.6 t3 with a merc t3 and that the boost came on very very fast.  i really wonder how the holset would do on its own

prolly very very laggy.. a holset is still huge to a 1.6, no matter what..

[Smokey Eddy]

Yes, i looked into using the larger holset HX35 and I still have it but i found some builds where it failed miserably. Very disappointing. And he was fueling it like a mofo! saw something like 4psi before it was reving way too high.

I am surprised, bugnut, that you are sticking with the smaller 1600cc block. I think the 1600cc block with the 1900cc head would make a really fun NA because of the good flow of the head. (having had the 1.9/1.6td and now a full 1.9aaz)

the 1.9 block is much sturdier. bigger rods and pistons. If you have access to a 1.9 bottom end it would be interesting, as i saw, for you to see the difference between the half breed and a full 1.9.
I feel like the full 1.9 makes much more torque but the half breed reved really really fast.
the 1.9 in neutral revs like a car where as the 1.6 bottom end with the 1.9 head on it reminded me of a weird sounding motorcycle. it revs QUICK and i was able to see about 3 pounds just reving it and thats with the T3.

I'm also starting to feel that the T3 is too small now as you did (plus mine is very old a dying slowly). My friend has a couple brand new JDM turbos from the WRX STI's im going to look into the flow charts on and see if they would be suitable. I would have to buy two so if they turn out to be a good match i'll let you know and maybe you'd want to replace the T3/k14 or what ever you go with with one.

Just a little add-on here;
These pumps and injectors will always supply an ample amount of diesel creating a black cloud. You should always make a cloud with and IDI unless you're running like a 175 shot of nitrous at it. ok maybe 175 is a bit big but  you know what i mean
black isn't bad.

[bugnut]

I thought about the 1.9 vs the 1.6 block.  After some looking I should have went with the 1.9 route.  I know more power can be made with that then the 1.6. You can't beat displacement!  But I do like how it revs. 

As for the turbo choices i will wait and see how this k14/hx30 works out.  I hope it is the right ticket.  If not I might just call it good for now as I have my bug project to work on.  This rabbit is just going to be my daily driver for awhile. 

An update on the build.  I have sent the head and pistons to the ceramic coater.  Should see those back in 2 weeks.  Right now I am working on the wastegate setup for the k14.  I cut off the old wastegate and will be brazing on the new setup.  I will have to post up pics a little later.

[bugnut]

hillfolk told me a friend of his tried compounding a 1.6 t3 with a merc t3 and that the boost came on very very fast.  i really wonder how the holset would do on its own

prolly very very laggy.. a holset is still huge to a 1.6, no matter what..

I would have to agree.  The holset by itself would be a pig.  Got to remember this turbo is factory for a cummins 4bt which is 3.9 liters.  Now you put that on a 1.6 and you might as well have a NA engine. 

[bugnut]

Got the wastegate done.  Now i just need to paint and wrap the exhaust. 

[bugnut]

Got the setup running, all I can say is  WOW.  This is fun.  Only have a few test miles on it but so far EGT's are only 1000 F.  Boost is 30 to 32psi.  I still have to tune both turbos.  Right now the HP pump is gated at 7psi from the LP.  The LP is set to open at 24psi.  I don't have my boost gauge hooked up on the intermediate pipe yet to see if it is putting out 24psi.  Before when I was running the k24 the max pressure was around 30 and the egts were well past 1600F.  I couldn't even use all the fuel this Giles pump had.  Now I have the foot to the floor going 85mph and still have cool temps. 

  Right now I still have to fix a fuel leak.  I cant seem to fix the leak where the bolt goes into the pump for when you time it.  I got fuel dribbling out of it.  I tried to anneal the copper washer that helped but still leaks.  Will try a new one tonight. 

 As for the transmission this 4t work pretty good.  I don't even need 5th gear.  Kinda wish I had a 3.88 ring and pinion in it rather than this 3.64. 

Still have a lot of testing to do before I am real happy   More to come as a get more miles on it. 

[vanagonturbo]

Where did you get a 4T?

[bugnut]

I got it off of ebay a few years back.  Tore it down and put in the wavetrak.  Only found one bad syncro and put  some new bearings in it.   Works good now.  Had to change out the mounting and shift linkage.  I had a donor car that I stole all the shift linkage and mounting bracket. 

[vanagonturbo]

US Ebay? Thats a pretty hard to get tranny over here I had to have mine shipped attached to a car

[rallydiesel]

Got any pics of the complete set-up? Compounds make me giddy.