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BruceH

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Apparently when you tighten the belt by using a smaller pulley it adds boost??

That too. No this is for real. I had a hell of a time making over 10-12psi. A few knowledgeble folks on this site suggested that prochargers really have to be tightened down past the factory guidelines. When I followed that advice boost jumped considerably. My boost gauge is mechanical so it wasn't datalogged but I saw it go over 16 at a quick glance. Blew the coupler right off too. Datalogged inferred map is 26 and the increase in pressure drop across the injectors was 20+ (almost 60 total) but I think the truth lies somewhere inbetween. At any rate I can no longer do a second gear pull past 5500-6000 rpm on the highway because the tires just boil once the boost builds. Third gear is just too dangerous.

You should talk Marc into having a dyno day in the near future.
 

Germeezy3

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That too. No this is for real. I had a hell of a time making over 10-12psi. A few knowledgeble folks on this site suggested that prochargers really have to be tightened down past the factory guidelines. When I followed that advice boost jumped considerably. My boost gauge is mechanical so it wasn't datalogged but I saw it go over 16 at a quick glance. Blew the coupler right off too. Datalogged inferred map is 26 and the increase in pressure drop across the injectors was 20+ (almost 60 total) but I think the truth lies somewhere inbetween. At any rate I can no longer do a second gear pull past 5500-6000 rpm on the highway because the tires just boil once the boost builds. Third gear is just too dangerous.

You should talk Marc into having a dyno day in the near future.

I am curious what my lead sled puts down, and I am quite jelly of your car because I miss freeway wheelspin!
 

Germeezy3

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A friend, and S197 member recently trapped 131 on a 100 hit with a 6R80 bolt ons S197 so now I am looking at 5.0's again.
 

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