Quote:
Originally Posted by Matt@Cosworth
if you're going SD ( speed density) then yes you can modify the inlet pipe to not include the stock airbox and MAF meter , if you need some support to achieve this then I'd be happy to help where I can
the minimum radius you can run is 25mm on a PK tooth belt so bear that in mind when designing your nose pulley and you'll need to run about a 3:1 ratio to get the boost into the sweet spot for the unit, so as the crank pulley is 137mm diameter ( I think from memory) then you will need to make the crank pulley bigger and possibly require 8 ribs not 6 to account for the extra power to drive it.
however one issue with extending the length of the pulley so its no longer overhung means that you will be canterlevering the bearings in the nose casting
now they will cope with a certain level of load but the overhang needs to be kept to a minimum and some kind of tensioner will be required as you need to try and achieve a minimum of 180 to 200 degrees of belt wrap on the charger pulley
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So are you suggesting that I remove the MAF sensor altogether and just use the MAP sensor in the inlet manifold? I was just going to be route the pipework but if you think this is feasible then perhaps it would be a better option. Thanks for offering to help.
I will look at fabricating a tensioner bracket to get the correct pulley wrap. How close are the bearings on the SC? I could always make up a front bearing bracket to take the load but then perhaps just changing the full pulley set would be easier after all...