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Vw 356 Supercharged

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camando Commited Dubber

52 posts · joined Jun 2006 ·

#698653
looks good Nick
look forward to hearing it 😎

greedy53 Bishop of Volkswagenism

3,062 posts · joined Mar 2006 ·

#698903
very nice but don't forget the blow of valve or you will be picking bits of your blowers vanes all over the state
also get the dizzy right or you will be tearing your hair out wondering why it won't rev
👍👍😂🙅🥷😬🤓

aintgotitmusthaveit Officially Full-On Dubber

295 posts · joined Jun 2006 ·

#698907
That was the plan Greedy, looking for a pop off/pressure relief valve. Any recommendations?
The way I see normal blow off valves work is they are vacuum driven off the vaccum found upstrem side of the Sc inlet in a draw through application.
So when you close the throttle the blow off valve is sucked by the vacuum driving the blow off valve to open and allowing a positive pressure on the down stream side ( from over spoooling) to be vented.... I think

splitbusaustralia Wolfsburg Wizard

487 posts · joined Aug 2002 ·

#698912
Nice looking install!

However, roots style blowers don't require, or normally use a blow-off valve.

Ideally you work out the boost you want to generate (above atmospheric pressure) for your engine capacity and rpms. You look at what your blower
produces and calculate the pulley sizes you need to generate the required amount of boost....

You don't get overspooling with a SC because the drive
is directly related to engine rpm (unlike a turbo). You are better off doing the calcs rather than trying to control 'unknown' boost levels with a BOV on an SC....

regards

RobK

Joel Now containing 100\% E-Wang

9,368 posts · joined Feb 2006 ·

#698927
Rob BOVs in this situation are installed as blow back protection - not to vent boost

even the original Judsons and shorrocks have the same thing
if the engine spits back thro the carb its gonna try and spin the blower backwards and as its belt driven that aint gonna happen so as Steve said there will bits of blower lobes everywhere

Nick, i just run a garden variety Greddy style with no vac hooked up bolted to the blower manifold and as i pointed out in my thread its saved the blower a couple of times

just set the spring tension right so it wont leak boost but will open on a spit back
ive had mine upto 10psi with no dramas

splitbusaustralia Wolfsburg Wizard

487 posts · joined Aug 2002 ·

#698933
Ah .... sorry I saw the comment relating to vacuum and overspooling and thought it was going to be used to try and control boost level.

Obviously good insurance and well worth doing although some would argue the serpentine style ribbed belt will slip and it's the Gilmer (tooth) style drive setup that causes a SC to pop....but why test that?

regards

RobK

Dilbert Slammed & Awesome Dubber

89 posts · joined Jul 2008 ·

#698935
should just put a 911 rear end with a stock motor in it and be done with it.

Joel Now containing 100\% E-Wang

9,368 posts · joined Feb 2006 ·

#698940
why? did ur mates, uncles, freind do that back in the day? 😂

greedy53 Bishop of Volkswagenism

3,062 posts · joined Mar 2006 ·

#699067
i foiund a wrx on ebay cost $45 works well as my little unit was playing rough for a while, and back fireing like mad with no damage
and as for putting in a porsche rear end in $$$$$$ my blown motor cost all up $500.00 and $350 was for the blower to get a 80-83 bhp my first job that i built with no money i made a blow of out of a 1 inch pipe with a screw on top a valve spring and some drilled holes at and a tap washer now thats doing it the hard way but it worked. and as for roots type blowers they had a blow back plate that blew when it back fired if you watch the drag cars you may see the plate blow and sometimes it just blows the entire blower
good luck
👍👍😂🙅🥷😬🤓

Joel Now containing 100\% E-Wang

9,368 posts · joined Feb 2006 ·

#699116
yes this is the great fatso BOV for the budget conscious 😀




that one would be fine nick

i just went the plumb back style cos one of these days i was gonna plumb it outta the engine bay just for safteys sake

aintgotitmusthaveit Officially Full-On Dubber

295 posts · joined Jun 2006 ·

#700126
HI guys throwing around ideas on the belt drive
Up for comment, thinking of doing something like this:

http://www.postimage.org/image.php?v=Pq1mp51i

Why? To be different to the great work that others Like Joel on this forum have done, and secondly have a set up that can be introduced without engine removal.

In short its a set up like a serpentine belt, the difference being the tensioner is a double pulley with the second pulley driving the supercharger itself.

This allows the engine to be removed from the car without the additional obstruction that results from having an additional pulley sticking out 2" past the crank. (my speedsetr replica has even less space than a stock beetle!)

This also allows the changing of boost by changing the tensioner pulley without removal of the engine to gain access to the main crankbolt.

You can use the standard generator washers to establish tension on the generator side allowing the "tensioner" to have a single plane of adjustment for the superchager side (may not need that additional tensioner on the SC belt).

Hope I described it ok.. Joel & Greedy any comments?
PS Greedy I see your set up is great and works but I do not want to cut the shroud in 1/2 yet...

Comments will be appreciated.

Joel Now containing 100\% E-Wang

9,368 posts · joined Feb 2006 ·

#700133
Hi Nick
thats actually very well thought out
theres a bit of extra engineering involved in setting it up i cant see why there would be a problem if you could get good tension on both belts without to much strain on the idler pulley it should work well

i toyed with the idea of running a scat serpentine belt kit running the blower as well but couldnt get it to all line up right

im still thinking of going the rib belt for the alternator on my car after witnessing first hand the difference it made on kims bug

aintgotitmusthaveit Officially Full-On Dubber

295 posts · joined Jun 2006 ·

#700143
Joel, do you think I will have the generator side contating the belt enought to actuately drive the SC without slipping?
I was planning on keeping the std V belt on the Gennie side of things

greedy53 Bishop of Volkswagenism

3,062 posts · joined Mar 2006 ·

#700261
well for my 2 bob worth. i think that running both on the middel pulley will give you a headache when doing the tighten up as you will need to adjust the genny pully from the genny's aju8stable system because if its loose the engine will over heat with a slow fan and because these blowers will generate head by just being a blower and heating up the air
so try an keep things as simple and if you do a blower belt it will still run well with a standard system without the blower it's all a juggeling act but when you get it right it feels really gooood
👍👍😂🙅🥷😬🤓

Joel Now containing 100\% E-Wang

9,368 posts · joined Feb 2006 ·

#700312
Nick are you keeping the 5pk belt on the blower?

cos your gonna have to create a hybrid Vbelt/rib belt mule pulley if your staying Vbelt on the genny

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 ·

#700315
No you have it all wrong

the SC stands for Sexy Car
I read it on FACEBOOK so it must be true


http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630


http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099


http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603


http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

Joel Now containing 100\% E-Wang

9,368 posts · joined Feb 2006 ·

#700322
so where did it all go wrong with 911sc then?? 😂

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 ·

#700323
well its litterly 9 11s which is double sexy LOL
I read it on FACEBOOK so it must be true


http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630


http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099


http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603


http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

greedy53 Bishop of Volkswagenism

3,062 posts · joined Mar 2006 ·

#700325
sc isn't that single cab
👍👍😂🙅🥷😬🤓

aintgotitmusthaveit Officially Full-On Dubber

295 posts · joined Jun 2006 ·

#708722
ok an update is due

Thanks to a buddy at work I have had parts machined up.
First off a press fit, dowelled and pinned bit of Aluminium onto the original SC drive allowed the offsetting ofthe belt closer to the crank
While a removable lower pulley hanging off the main wheel (Held in with Aerospace Fasteners Hiloks) which allows boost to be modified by changing the pulley without remoival of the main crank bolt!!
http://www.postimage.org/image.php?v=gx1NR7Wr
http://www.postimage.org/image.php?v=gx1NR2X9
Next BOV and then ignition... Stay tuned

Golde60 Fahrvergnugen

858 posts · joined Aug 2002 ·

#708726
looking good guys
...................( O \ l / O ).....................

Gracey Wolfsburg Wizard

511 posts · joined Feb 2003 ·

#709364
Looking good, I like the inlet manifold design.
Be interesting to see how it performs.

Turbo54 Veteran Volks Folk

2,220 posts · joined Jul 2004 ·

#710518
Looks good, I personally after having experience with blowers and pulleys would of run a toothed belt rather than a serpentine style. I found my old blown engine to slip at big revs and ended up snapping the bolt off in the snout of the blower.. These were brand new pulleys and belts so I changed it over to a gilmer style and could run a slack belt and never slip. It is worrying how much tension and load must be on the crank and bearings with the belt pulled so tight to one side. If you could, this is what I would do. Good luck T54
C'mon kids gather round,
there's a new sensation hitting town,
It's moving straight, low to the ground,
it'll pick you up when your feeling down.

aintgotitmusthaveit Officially Full-On Dubber

295 posts · joined Jun 2006 ·

#710906
HI guys just an update, Tensioner sorted and belt is on:

[img]https://www.postimage.org/aVXFJSJ.jpg[/img]

Here are the picts, still waiting on over pressure valve to arrive from US.
Still have not figured ou here to route accellerator cable,
After that is sorting out the remaping of the dizzy.

Here tis:

Joel Now containing 100\% E-Wang

9,368 posts · joined Feb 2006 ·

#710908
Nick i just ran a longer one with its own spring type conduit from a bike shop
fits inside the standard vw tube
let me know if u need details

cb john Wolfsburg Wizard

470 posts · joined Jun 2007 ·

#710910
This is very similar to what I did some time ago...

Joel Now containing 100\% E-Wang

9,368 posts · joined Feb 2006 ·

#711086
john have you got any pics of that one finished?
pretty much identical layout to mine