Author Topic: supercharger differences  (Read 3949 times)

Offline djtez

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supercharger differences
« on: September 05, 2008, 10:35:24 pm »
how do i tell if my charger has been tinkered with
are there visible marking or bits i can see to tell if its been ported or stage 4 or anything really!!

pictures would be a gr8 help for a fumb duck like me lol

wat kind of power differences are there in different stages or portin and pulley sizes?
even a rough guess would be also gr8 help

thank you very very much.

Offline PeteG40

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Re: supercharger differences
« Reply #1 on: September 05, 2008, 10:53:29 pm »
porting you can see by looking at the outlet (give some indication) post some pics of it off the car.

porting flows air a bit better, you only really get any differences with a pulley and chip

Offline djtez

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Re: Re: supercharger differences
« Reply #2 on: September 07, 2008, 04:59:52 pm »
got either a 63mm or 65mm.. the differnce is so small i messured it with a measursing tape whilst still on the car...

wat kind of service intervals with i put onmyself having this pulley?

Offline PeteG40

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Re: Re: Re: supercharger differences
« Reply #3 on: September 07, 2008, 07:45:16 pm »
about 20-25k on a 65, i'd not use a 63mm andy france used to use one and blew seals all the time

Offline G-spot

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Re: Re: Re: Re: supercharger differences
« Reply #4 on: September 08, 2008, 11:17:41 am »
[quote pid=3914 author=djtez date=1220650524]pictures would be a gr8 help for a fumb duck like me lol[/quote]

My pleasure,

here are a few pics of the typical porting that you can identify on the G40.

First is lightly ported, note the thicker vane at oil supply intake, this vane is typical of all the vanes if no porting has taken lpace, though this charger has been lightly ported ion the other vanes,
Inside,

and Out

This charger once again still shows the thicket oil feed vane, but the other vanes have been pretty much maxed out as far as material removal go's.  

Once again inside

and Out


Beside this porting on the outlet vanes, chargers should be ported on the scoll pass through port/vanes, this is a lot more tricky due to the restricted access, and if too much material is removed then the scroll can be more prone to failure, plus the balance shaft will need to be tweeked to avoid vibration issues.

Offline PeteG40

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Re: Re: Re: Re: Re: supercharger differences
« Reply #5 on: September 08, 2008, 11:59:14 am »
not only porting on the outlet (btw g-spot you can take a little more out on the centre looking from the outside - but not much more and on the 'hex' bit of the seal - later psd ones are round there - even less material!) but its key inside on the inlet shallow channel.

Offline Raw

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Re: Re: Re: Re: Re: Re: supercharger differences
« Reply #6 on: September 08, 2008, 09:18:28 pm »
[quote pid=3988 author=peteg40 date=1220871554]not only porting on the outlet (btw g-spot you can take a little more out on the centre looking from the outside - but not much more and on the 'hex' bit of the seal - later psd ones are round there - even less material!) but its key inside on the inlet shallow channel.[/quote]

Pitstop "fullblend" exhaust porting:



Pitstop "fullblend" inlet channel porting:


Offline Alex

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Re: Re: Re: Re: Re: Re: Re: supercharger differences
« Reply #7 on: September 09, 2008, 02:30:22 am »
I wonder how many completely standard chargers are left now. Can't be many, surely.

Offline PeteG40

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Re: Re: Re: Re: Re: Re: Re: Re: supercharger differences
« Reply #8 on: September 09, 2008, 08:14:10 am »
i've got one on my g!

Offline djtez

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Re: Re: Re: Re: Re: Re: Re: Re: Re: supercharger differences
« Reply #9 on: September 09, 2008, 12:43:00 pm »
well im wondering because the g40 i bought was from i guy i previously got my gt from..

and he sold me a gt which had this crazy 300 degeree cam in it which he claimed he knew nothing about.. he sayed he knew it had summin done to it ..

same goes with the g40 i just came across a fast road piper cam and it already had a 65mm pulley on it.. wats to say the charger aint been touched.. he bought this g40 from england i think..

came in an old banger shell light blue or green.. and took the engine out it.

Offline Tav

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Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: supercharger differences
« Reply #10 on: September 09, 2008, 10:25:38 pm »
I've got a standard one sitting in my wardrobe...though I doubt it'll stay that way.
« Last Edit: September 09, 2008, 10:33:49 pm by Tav »