Hi Chris, glad to see you here. Not a lot of true hot rodding going on, but a fairly informative site. I like the draw thru idea with the 2.3. It makes for a lot less headaches. Got tired of all the BS on TF, so I don't post there anymore. Pretty much just lurk on this site, turbopinto.com and TF. Good luck with the project.
 
Curtis-----AKA Turbo Toy

they have been proven to work.   

I have done both the draw through and blow through setups on both a 2.0 and 2.3 ( 2.5) motors. In my opinion, the blow through works better ( on a pinto) for a few reasons. First reason is, on a pinto ( other than using a intake manifold like on the 79 turbo capri/mustang ) the carb will be sitting low ( that is lower than the intake manifold). This may cause a puddling condition in various areas. Also, as mentioned above you cant use an innercooler with a draw through ( because of the puddling condition and the fact that the gas would condense on the innercooler and fill it up). The VWs all have the carb at the highest point and everything goes down hill, which makes it work real well. However, a " real good " thing about a draw through is that your can use a Vacuum secondary carb which is ( in my opinion ) the best way to tune the secondary side. On the blow through you have to use a mechanical secondary, ( which in my opinion is a royal pain to tune). The issue here is when the secondary side opens up its about the same time boost comes up and with out the tuning ( al la vacuum ) you cant get the fuel to dial in at the correct time i.e. early or later than the secondary throttle blades open. On my 2.0 I am using a holley 650 double pumper and just installed a restrictor plate ( for the secondary side) because when all 4 throttle blades are wide open I get a condition when too much air is being forced into the combustion chamber and my motor just cant handle all that volume. Gas however is what I need ( and lots of it) So, I need about a 500 cfm double pumper ( btw, a 4 barrel carb and a 2 barrel carb is measured differently so a 500 cfm 2 barrel would not be the same as a 500 4 barrel ) but i digress. I would toss my current carb if I could find a vaccum 4 barrel that would work in a blow through deal ( and not spend thousands). So, anyway I hope you get the right combo working and please show us pictures. Let me know if I can be any help.

I have a CSU bt 750 onmy 306 Turbo Zephyr.
C&S aerosol carbs work well also for a bt setup.

A pic of the bt setup I am changing.

Turbopinto72, Have you tried increasing the Power valve ciruit in your current 650 BP? I ended up drilling the Power Valve circuit to 92 thousands if I remember right to get the secondary side to feed correctly, worked great, and i could still run a normal size secondary main jets.

I have yet to find a cure for the transition from vacuum to boost with a blow through set up, I just couldn't get rid of the huge rich spike durring transition.  i think i might still hold the record for a Ford inline 250 six (modified Ford iron head) @ 497 whp and 501 Ft lbs
Walt

Very interesting build. I`m still on the fence about taking this totally complete `78 and cutting it up to back half and put my 572 in. I would love to see your progress on this turbo setup. I also would like to see where you end up with carb choice. Looking at the only mount option, puddling is going to be the biggest concern. I know no one really likes them but a "quadra bog" carb would be a great choice for atomization imo. On the skinny, what can these stock motors take as far as boost and power? And I meen stock, maybe a cam change.
Sorry for the hi-jack. Un-intended, just waying options and satisfying curiosity.

Racer, how much Hp are you looking to make???

32-36 lbs? Damn! That should net on a stock motor somewhere (I`m guessing) around 340 hp. With the original 13`s, that would be a tire frier. The only thing that scares me on a build like that would be remembering the laughable SVO. Now granted, turbo technology has come along way since but popping the hood of a SVO `stang and the sound it made wasn`t Americana. But it sure would be alot less work over the big block and back half. If this car wasn`t so "there", I wouldn`t think twice about the saw-z-all.
 

Thats awsome, i like where this is going, please tell me this is your idea of a daily driver, then i wont feel alone

Hey turbopinto72.. .there is a company called Pro Systems Racing. Don't know if you have heard of them or not but they build carbs...and damn nice ones. I had one built for my 347 and it was spot on. They take all the info and build a carb to match what you have. My carb was about $700 and was a 4150 dbl pumper 730cfm. They could build a carb for what you have that will do the trick. http://www.prosystemsracing.com/index1.html

Pro Systems Racing is the Ticket...they are located here in Muskegon MI. and FL . I have worked with and know the support man there  Brad Hosmer. He worked at our Ford Dealership here in Muskegon for years as a Tech. Yes they will build to spec's of your build up- thay are turn key, but$$ . They do Big name Drag Racing and Track. ....

Welds 15x3.5 on the front,10 holes with 295/50/15s on the rear.

Still waiting on the turbo/carb adapter and
the intake/turbo adapter.

Found the wagon on CL for 500.00.

No rust,needs slight bodywork nothing major.

2.3/manual/no ps,no ac,no pb,no roof rack,just
basic transportation .Runs like a 3 legged dog on crack,
that might be because of the 47 vacuum leaks it has.

Will post pics later.

Turns out the wagon is a California emmissions car so it is getting stripped of all
emmission stuff.
Anyone want a feedback carb,ecu,solenoids,vacuum solenoid valve and associated
stuff? Most of the vacuum lines are gone though.

8.8 rear check
3.73 gears check
Leaf spring pads,plates,ubolts check,

Cut off all brackets from Fox body rearend
weld spring pads, still a go for the weekend.

Sure,its in the same shop as your parts are.