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Project Supracharger


David P

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Strong tea with plenty of bromide and a cold shower for the lad with the funny car. :)

 

Playing with spanners doesn't quite float my trouser boat, :think: but the 'lingering' conversation(s) I had today with the gorgeous red-head who lives just over the road, does tempt a visit to the bathroom. ;)

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I'm not happy with the stiff operation of the throttle cable. :(

 

I was hoping not to have to tinker with the throttle ramps, those things are Chinese puzzles at the best of times, :think: but needs must.

 

So I have worked out a way to reverse and re-align the throttle cable ramp on the Lexus t.b. and use the OE N/A cable. :)

 

It looks like I'm back to making frackets again. :shrug:

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  • 1 month later...

Hi,

 

Still at it, :thumbs: yet recently I've been very busy and haven't had the time needed to keep nursing the project along. :(

 

I lost count of the number of failed attempts and number of weeks/months to eventually get a straight adaptor made.

 

This long awaited item has now been fitted to the car engine for several weeks in readiness for the TIG welding, however, I have been dicked about several times with this little job too.

 

As I have mentioned before, elements that require work of others, for reasons probably better not knowing, :think: have proven mostly to be a PITA. :shrug:

 

Here's a pic.

 

sc72 001.JPG

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  • 1 month later...

I have bought high tensile Allen bolts in the correct lengths and final fitted the re-engineered belt tensioner system.

 

A new MT6 arm plus 5kg extra from the gas strut is the first guess at belt tension.

 

The gas strut has been vented down to it's minimum in readiness for the first trials after the PAS support has been TIG welded.

 

 

attachment.php?attachmentid=143152&d=1324245562

sc80 007.JPG

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  • 2 weeks later...

I have been tinkering with Bob's lathe, with this PAS pulley wheel fitted with the Mk5 adaptor, the run-out is down to 2 thou.

With delicate shimming I aim to reduce this to 1 thou and then keep my fingers crossed the floating bearing is in the correct plane to allow the little wonk. :think:

 

attachment.php?attachmentid=143593&d=1325163707

pas 003.JPG

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Good news, Barneys pump has turned up and I have taken the PAS pulley to the local engineers for them to machine a true face. :)

 

Bad news, I have found that the Meziere water-pump idler pulley has worn loose on it's bearing. :(

 

I have had nothing but trouble with aluminium pulleys and think it prudent to have one made from steel. :shrug:

 

attachment.php?attachmentid=144091&d=1326161648

meziere pulley.jpg

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The slack in the pulley proved to be lateral movement in the bearing, which is good news and whilst it was off I had a 10mm larger idler cloned from steel, which is not as good news as I would like.

 

It's heavier than it need be, yet now the important machining has been done, I can machine some of the weight off and 'prettify' it.

 

Pics of fronts of; OE PAS pulley with true planed face - Meziere alloy pulley - bespoke steel idler

 

attachment.php?attachmentid=144378&d=1326498105

 

Pics of rears of; Meziere alloy pulley - bespoke steel idler.

 

attachment.php?attachmentid=144379&d=1326498105

pulleys 003.JPG

pulleys 004.JPG

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It's pleasing to make a small step forwards, but it would be nice if just once in a while someone did what they were paid for.

 

The w.p. idler pic is of the engineers 3rd attempt at a 'lightweight' steel pulley, yet it is still heavy enough to run tank tracks.

 

The fex plate will be with Nodalmighty on Monday (because i do what I am paid for ;)) Getting most engineering firms to come out of bridge building mode to make something light, well thought out and elegant is hard work unless you go to somewhere Motorsport or Aerospace specialised. Good luck David, hope this works, you know my thoughts on the PAS pump as an element in the drive belt train... At least it will allow you to test the setup even if it needs modding later on. I said suprcharger installs were many fold more hassle than a turbo ;)

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Cheers Chris, we need a few more like minded. :thumbs:

 

Good news is; the Mk3 PAS pulley runs the Mk5 adaptor straight and true :yahoo: and I declare it good enough for the support bracket to be fabricated. :)

 

More good news is; the Meziere bearing mount stub is nice and strong to mount the steel idler pulley.

 

attachment.php?attachmentid=144406&d=1326550589

pump pulley 001.JPG

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I have arranged for TIG Stig to weld the PAS support bracket components tomorrow, then I'll be ready for a test fit of the supercharger on the car engine.

 

I know that the Gatorback belt I have won't be quite long enough for the job, because of the additional idler between PAS & supercharger and a 10mm larger diameter idler on water-pump, but using the unfinished steel idler a final measurement can be made for the correct belt and whilst it's on, I'm hoping that I can reverse lay the belt I have on the air-con pulley to get it on and allow me to give the charger it's first twirl and check for run-out.

 

Nearly time to hear it's first 'Growl'. :)

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