Supercharger query

[Sandy 0]

Hello Folks,

 

As I can re-condition my 'charger myself. I was thinking about

changing the size of my pulley to say a 65mm instead of the 70mm I

have at the moment would I need to change my AMD chip. If so has

anybody tried that SNS chip yet.

 

If I fit a 65mm pulley what will the rpm of the charger be and what

PSI would I expect from it.

 

Thanks for any help in advance

[LowG 0]

how are you going to recondition it yourself :shock: i think with a 65mm pulley youll be lookig at about 13000rpm

[W3RKD 0]

unless im mistaken the charger spins at 1 1/2 times engine speed on std pulley

[bazgreener 0]

I have an sns chip and am very pleased with it, dubcharged is your man, he runs a 65mm pulley

[Dubcharged 0]

Hi Sandy

 

With a 65, you should get around 15-16 psi depending on the condition of the charger and how well its been ported.

 

I'm getting 15psi with a cam (you'll get more without the cam) and using red top injectors to supply the necessary fuelling. I have a good set of maps for the red top injectors and 65/62mm pullies. I have the injectors too :D

[Sandy 0]

Hello Low G

 

Just got a full G60 kit on the net all bearings + seals + special coating and me and my girlfriends dad done the full thing in 5 hours. (which included taking the charger of then putting it back on) First time next time we do it we will be much faster as we know what to expect.

 

when I done my charger the seals where bust not the bearings they were perfect that was on 45,000 miles so I think the 'charger can quite easily take a 65mm pulley (bearings I installed are tested up to 15,000 rpm)

 

PS so anybody know if I need to change my chip if I change my pulley ??

[GazzaG60 0]

the question to ask your self is do you want yur hard work and high boost engine to go pop or to reach its potential

[bazgreener 0]

You will deffo have to change your chip and possibly your injectors to cope with the extra fuelling requirements of a 65mm pulley.