Used Superchargers

[Crazykent]

Have been planning on doing a supercharger for a long time now and always just thought i'd go a new harrop 1900 when i had the money but i keep seeing plenty up for sale sceond hand between 5-8000 dollars and just wondered what everyones thoughts were on whether it was a sensible thing to buy 2nd hand and if not why.

[white lie]

It's like anything second hand, always a bit of a gamble but I guess it can be worthwhile. I'd consider it like an engine, better to hear it running otherwise you don't know what sort of nick it's in. You also want to make sure you're getting all the bits.

All of that said, I only paid 7k for my Maggie new so don't see the value in them for that sort of coin.

[Crazykent]

It would be hard for me to find someone that knows what they're lookin at if i went an looked at one
But for the most part i just need to know what could be wrong with one if there was ever gonna be somthing wrong with it
i spose it would come down to km's it was on the car for which would also help determine the price too, you get what you pay for.

Thats a good point seeing it running though. How did you get ur maggie so cheap?

[Crazykent]

Just spent 7500 on cam package and lifters because a new charger plus built auto was gonna cost too much
Im glad i did cause after driving the car with the power its got now i reckon i'd want more if it just had a charger on it
now i get extra power and the cam sound, sounds tuff as fuk. But yeh wont have the money again till next winter

Im sure there will be one floating around then but just wanna spend this time justifying buying a second hand one.
Autotechnique was gonna put one on for me but for 12 grand kinda seems silly when i can just get a 2nd hand one
just need to know if its something i should be doing considering i like to do things sensibly.

[white lie]

How did you get ur maggie so cheap?

When they first came out, they were cheaper than they are now. I think the dollar was stronger. CAPA knocked a few hundred off for EOFY sale I think it was.

Bearings and seals are the main things to go in them, can't remember how much it costs to rebuild them but they're not exactly cheap.

[Crazykent]

When they first came out, they were cheaper than they are now. I think the dollar was stronger. CAPA knocked a few hundred off for EOFY sale I think it was.

Bearings and seals are the main things to go in them, can't remember how much it costs to rebuild them but they're not exactly cheap.

Ok so there's obviously a big risk involved. I think ill just go new, there's deffinately an element of enjoyment when buying
anything new plus warranty and reassurance that your getting what you pay for, plus i dont see me ever selling this car
as i dont like ve/vf's. It's a turismo blue VZ SS.

Relatively speaking White Lie do you think 500hp is enough of a thrill to get that push back in the seat feeling?

Im thinking of putting aftermarket heads on when i do the charger/built auto so i can save on another tune.
But then reliability will become more of an issue too wont it?

[XUV]

It's a turismo blue VZ SS.



5.7 or 6.0 ???

[Crazykent]

5.7 or 6.0 ???

5.7 litre..

[VNV8]

If you're doing the heads as well, it would be worth changing the cam to a 'blower' grind, and changing the lifters and springs if not already done.

[Crazykent]

If you're doing the heads as well, it would be worth changing the cam to a 'blower' grind, and changing the lifters and springs if not already done.

its got a vcm 6 blower cam and lifters and springs are done.

[white lie]

Mine makes a shade over 500 thru a big stalled auto. Has run 11.3 and my car would be close to 2T. Easily frys the tyres but very predictable because it makes so much torque.

Like always, you do get used to it and want a bit more but it's definitely a nice level for the street IMO. Much more and transmissions, diffs, drive/tail shafts etc all become weak links.

What you do depends on how deep the pockets are. If you can afford to do the heads then you may as well but it would cost more in labour for someone to pull the blower off and fit the heads later than touching up the tune. Other option is heads first, will give you a decent torque increase.

[Crazykent]

Mine makes a shade over 500 thru a big stalled auto. Has run 11.3 and my car would be close to 2T. Easily frys the tyres but very predictable because it makes so much torque.

Like always, you do get used to it and want a bit more but it's definitely a nice level for the street IMO. Much more and transmissions, diffs, drive/tail shafts etc all become weak links.

What you do depends on how deep the pockets are. If you can afford to do the heads then you may as well but it would cost more in labour for someone to pull the blower off and fit the heads later than touching up the tune. Other option is heads first, will give you a decent torque increase.

You always give such great advice white lie you always tell me exactly what i need to know!, thankyou.

What does 2T mean?

Well for the sake of torque really i think ill put some different heads on too.

I guess my main goal here is to keep to total number of kw's low enough that im most likely
not going to start breaking things, maybe i should stick with the smaller pulley.

Torque is really all im after here! dont know that much about this stuff and i've spoken to autotechnice about it
but they say torque is a product of the power which im sure is true in one sense but in the sense that im looking for torque only
i just wish i knew what sort of setup gave the most torque? im guessing a bigger engine with the same mods.

ill be happy with 1000nm but im guessing ill max out at 900nm with my setup.

3.7 gears
1 7/8 headers
twin 2.5 inch cat back
vcm 6
OTR

then of course a harrop 1900 with, i dunno some kind of heads? ill have the money to do it all
next winter so why not, an i suppose if i break something ill just replace it with something heavy duty
to keep the fun going, i dont do burnouts by the way.

[IJ.]

2 tonne in weight

[v8fazz]

Torque is what will break things!

I ended up with over 1000nm with a Harrop 1900 on a LS1 - standard heads but with a boost friendly cam at 10psi (M6 and 3.9 diff)

And that was with a 3000km old second hand blower kit. As others have mentioned the bearings would be the main thing to look out for. Keep in mind that if you change from the standard pulley to increase the boost you will void the warranty anyway. BTW the factory pulley which I think is 85mm from memory will give you around 6psi. To increase the boost you go to a smaller pulley.

Im about to change from the 3.9's back to 3.46 so I can stretch 1st and 2nd gear out a bit more so I will loose a little bit of torque but it will give a longer 'pushed back in the seat' feeling, and my gearbox is definitely on its way out anyway!

[white lie]

You always give such great advice white lie you always tell me exactly what i need to know!, thankyou.

What does 2T mean?

Well for the sake of torque really i think ill put some different heads on too.

I guess my main goal here is to keep to total number of kw's low enough that im most likely
not going to start breaking things, maybe i should stick with the smaller pulley.

Torque is really all im after here! dont know that much about this stuff and i've spoken to autotechnice about it
but they say torque is a product of the power which im sure is true in one sense but in the sense that im looking for torque only
i just wish i knew what sort of setup gave the most torque? im guessing a bigger engine with the same mods.

ill be happy with 1000nm but im guessing ill max out at 900nm with my setup.

3.7 gears
1 7/8 headers
twin 2.5 inch cat back
vcm 6
OTR

then of course a harrop 1900 with, i dunno some kind of heads? ill have the money to do it all
next winter so why not, an i suppose if i break something ill just replace it with something heavy duty
to keep the fun going, i dont do burnouts by the way.

As IJ said, 2 tonne. I think the GTS was around 1700kg to begin with, I've got a heap of sound deadening and very large stereo so it's a bit on the heavy side... Will get it on the scales one day.

It's all luck of the draw man. Not sure what my torque ends up at but with the multiplication of the converter, short gears etc its getting up there. That said, I'm still running a standard 4L65e box, converter seems to be giving up the ghost before the box. Loads and loads of 11 second passes with hard launches (1.5 60 footers on 18" radials) and haven't broken anything yet where plenty of people seem to do driveshafts and gearboxes on a lot less power... Guess it comes down to driving like a nanna most of the time on the street.

And as said, smaller pulleys equate to more boost.

[Tre-Cool]

I run a very old HH122 on my brothers ve and it's done plenty of hard km's. I wouldn't shy away from a 2nd hand unit if you get a good price on one.

Just bare in mind that a HTV blower will be better than the HH122, which is better than the Eaton 112 blowers.

Im not sure how big the vcm6 cam is, but my brothers has a 228/234 and makes a consistent 630+rwhp on e85 with about 11psi.