34PCT turbo mods pics

With Turbo and Super charging you can create massive horsepower with vw motors.

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mike thompson
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34PCT turbo mods pics

Post by mike thompson » Sun Apr 20, 2008 2:39 pm

Every couple of months I get PMs requesting info on this.

I just put the buggy back on the road after the long winter.
It's delightful.

The bad- It does not like full choke with the turbo (like a stocker) but doesn't like no choke. The best I have been able to do is make a cut-down choke plate so the throttle speed is up on the choke cam but not fully choked. The motor tends to stahl so blip it and go. Once a couple of minutes goes by, it is fine.

The good- this runs like a stock motor just putting around, it doesn't load up, it simply has more power on tap when crusing and is a hoot with full throttle from 3500 to 5500.

The concepts I show here are applicable to other carbs too.

The stock main jet is too small, it needs to go up a few thousandths ( I drill mine -welding tip cleaners and a mic are handy for seeing what you have and what you can step up to- if you don't want to drill jets - that's OK, I have no idea where to get Soles jets from).

Here is my mod to the E-tube,causing the fuel curve to richen at the top end: soldering up the 2 bottom holes (pay no attention to the smeared solder from prior experiments:
Image
This mod I did to help cover the flat spot off idle, it brings the pump shot in at a quicker rate because I altered the ratio by bending the arm (probably would help N.A.):
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I don't know how useful it was to punch the air holes closed a little( inside the carb top), that lead to the brass tubes which act as a hi speed enrichment on the carb but I did that.
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To add seals to the throttle shaft, remove the arms on each side, then you file off the peened-over part of the screws which retain the throttle plate on the shaft (these screws get locktited in later). Select a drill just big enough for boring a shallow pocket in the throttle shaft bore for an "O" ring- use a drill press and watch out for the drill to "Bite in and pull deeper than you want, the rings need to be gas compatible- I used silicone (don't know where I got them - bits of tubing will do.
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The rings need to be "Captured" between the arms without binding the throttle shaft. The green stuff you see is epoxy I used to seal little holes after having drilled "Air seal" holes a long time ago, into the carb- Ididn't like them so I went with the "O" rings.

The carb can be turned back to N.A. function by undoing the mixture changes and leaving the seals in.

A long time ago I eliminated the 2 anti-dieseling solenoids on the carb. I richened up the idle jet by using a tip cleaner like a little round file in the idle jet, but I discoverd a better way which will work even with the idle solenoid.
Make a tiny groove with a small file on the angeled part of the idle jet tip - this will let more fuel into the carb via the groove. If you make a mistake, you can soldier up the grove and start over. Go slow and test with a warm motor, doing a little at a time. the small mixture adjusting screw on the driver's side is also a mixture tool - start with that one out a couple of turns.

Add another copper sealing washer under the fuel inlet valve to lower the fuel level, so that when, after boosting (and the resulting higher fuel level from the added fuel pressure during boost) your motor doesn't stumble when you brake.
Any questions?
Last edited by mike thompson on Sun Jul 20, 2008 5:10 pm, edited 3 times in total.

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panel
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Post by panel » Sun Apr 20, 2008 5:52 pm

Sticky for your project I'd say. It might cut down on the PM's :wink:
Subaru JDM EJ20 Turbo bus
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buzzboy
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Post by buzzboy » Sun Apr 20, 2008 7:59 pm

Your image has been moved/deleted
Or is it just me. Panel seems to see them.

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panel
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Post by panel » Sun Apr 20, 2008 9:17 pm

buzzboy wrote:Your image has been moved/deleted
Or is it just me. Panel seems to see them.
I don't either :cry:
Subaru JDM EJ20 Turbo bus
Built by Germans powered by Japanese and brought together by Canadians

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mike thompson
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Post by mike thompson » Mon Apr 21, 2008 4:13 pm

I see them, how about it Panel? Do you see them?
I'm very computer illerate, put them on from photobucket.

gatorvws
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Post by gatorvws » Mon Apr 21, 2008 7:32 pm

I don't see any pix either. Album is set on private.

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mike thompson
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Post by mike thompson » Mon Apr 21, 2008 8:04 pm

Is there something i can do to fix it? Help!

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panel
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Post by panel » Mon Apr 21, 2008 9:24 pm

mike thompson wrote:Is there something i can do to fix it? Help!
Email me the pix.
Subaru JDM EJ20 Turbo bus
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Kenny2428
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Post by Kenny2428 » Mon Apr 21, 2008 9:59 pm

I can't see them either, but I will make your post a sticky-great info. Thanks for posting this.

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mike thompson
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Post by mike thompson » Tue Apr 22, 2008 5:17 pm

Sorry for the confusion, I just edited the initial post to try to get the pics going on it. Lets see if I got it right.
Last edited by mike thompson on Sun May 18, 2008 11:27 am, edited 2 times in total.

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Buggin_74
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Post by Buggin_74 » Thu Apr 24, 2008 8:22 pm

funny speaking of blowthro 34pict3 setups theres a local car thats just come up on ebay
lasted 2 days and someone bought it outside ebay cheap

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1974 Germanlook 1303 Suba-Beetle
Subaru EJ25 Boost R 17", 4 Wheel discs, Topline suspension and A/C

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mike thompson
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Post by mike thompson » Sat Apr 26, 2008 8:52 pm

This isn't exactly a turbo mod, but I asked the guys at the speed section of the forums about opening up the venturi. Farmer gave me specifics on it, he reported a faint flatness at 2500 by going up 2mm. Gaining 3 hp.
I opened up the vent. one mm. - and richeded up the carb a tiny bit.
Runs fine and does seem to have a tad more umph.

a1953mdl
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Post by a1953mdl » Fri May 16, 2008 8:42 pm

Mike, your pics aren't working on photobucket either.
If you want to pm me, I can get the pics into this thread for you.
Lee

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Post by mike thompson » Tue Dec 09, 2008 7:51 pm

I decided to add this video from last summer to show what a modified stock carb turbo 1600 can do at the track, (don't remember if this is in the video section here):
http://www.youtube.com/watch?v=17yVbCmUTTg

farmer
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Post by farmer » Sat Dec 27, 2008 3:28 pm

mike thompson wrote:I decided to add this video from last summer to show what a modified stock carb turbo 1600 can do at the track, (don't remember if this is in the video section here):
http://www.youtube.com/watch?v=17yVbCmUTTg
Cool. What said the time slip on that ?

BTW. I figured out how to overcome the faint flat spot we were discussing, when going up in venturisize on the 34 mm PICT3. with stock cam. I simply reamed the pump nozzle up by approx. 0,05 mm. and reduced the pump´arm ravel a little again. (I had earlier increases it by about 10%) Now its only a tad over factory specs, but it gets the load faster now. That seemed to do the trick. I can now run a 28 mm. venturi with a stock cam, and get super smooth transisition.
T

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