chez2165 0 Posted October 25, 2006 I recently bought a G60 from advice given on here I have checked the boost figures through the MFA and it gives a reading of 1800. The car has been fitted with a 68mm pulley,chip,induction kit and a ported head any advice regarding the figures that it is showing. Thanks Andrew Quote Share this post Link to post Share on other sites
swfblade 0 Posted October 25, 2006 For UK cars, you should now see 450-470 (warm engine) fluctuating with idle. Go run your car!!! 3rd and 4th gear to REDLINE. Carefully note the highest #'s you've got. A pullied charger should not make less than 11.6psi, and even so, thats weak. A Stock charger should make 11.6psi in perfect shape! USA EURO Hg(#'s of boost/vacuum) 15 200 -23.7 psi 55 400 -17.8 psi 90 600 -11.9 psi 127 800 -5.9 psi 148 1000 0 (Atmosphere- ala no boost, charger is bypassed) 172 1200 2.9 psi (Your charger is dead or big boost leak) 192 1400 5.8 psi (Your charger is about dead or big boost leak) 211 1600 8.7 psi (Your charger needs new apex strips or big boost leak) 228 1800 11.6 psi (Great for stock pulley, Probably needs new apex strips if 68mm pulley) 242 2000 14.5 psi (Great for 68mm pulley on stock charger, about right for 65mm pulley) 255 2200 17.4 psi (Great for 68/65mm pulley on heavily ported charger, hold on to your ass fast!!) 255 and up folks need to be careful with fueling, as the programming maps end at about 242 on the ecu Dynotuning, and air/fuel/egt gauge, and custom chip recommended. HTH Quote Share this post Link to post Share on other sites
flusted 0 Posted October 25, 2006 sounds ok. People forget that pressure is a measurement when theres resistance. You will see less boost with a flowed head as the engine is using the boost up. I didnt explain that well did i? Quote Share this post Link to post Share on other sites
Walesy 0 Posted October 25, 2006 Yeah, that's the same as mine was giving with a ported head,68mm pulley, and a freshly serviced charger. I was told it was perfectly fine mate :) Quote Share this post Link to post Share on other sites
chez2165 0 Posted October 26, 2006 Thanks For your help, thought I was gonna have to shell out for a charger rebuild. Quote Share this post Link to post Share on other sites
W3RKD 0 Posted October 26, 2006 A drop in boost is not always the only factor to consider in weather or not to get your charger serviced! Not trying to scarmonger anyone/you here but the top shaft bearigs (6002/6003) dont last as long when runnig a 68mm pulley. Quote Share this post Link to post Share on other sites
