So I have a older AX1600 on my truck, the new motor I built is made for 10-13 lbs of boost but I can only get 3-4 lbs out of the whipple and that is using a 2.75 " pulley, I am leaving alot of HP on the table not having enough boost. I am wondering if I can just get a bigger commpresor ? like a 2.2L

thanks for the help

Is this a 88-95 TBI SBC with the supercharger on top or is it a 96-00 Vortec SBC with the supercharger on on the driver side? (I think your truck is a 93 but not sure)

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"James B." '99LT_Tahoe4Dr2WD, Tuned L29 Vortec 454, 62#Injectors, Cutouts, 4L80-E 10.5"14bolt ,EatonPosi-4.56:1, Gear_Vendors, HydroBoost, (NEXT: Brodix heads, 230/240 cam, SS roller rockers, longtubes, THEN: Intercooled W200R-8psi in the future...)

It is the 88-95 TBI SC, The motor is a fully forged 383 with afr 180 heads 8:8:1 comp

I bet you can change the compressor. Only 3lbs sounds like there is something else amiss. I know its just a 1.6 but i have had 1.6 compressors pull very good power. remember the magnacharger 112 is 1.5 liters i think and have seen guys put hige power to the ground with nitrous of course aiding but still the 1.6 lysholm is a better unit hands down. Look elsewhere but 383 cubes eats alot of the air up. I bet you are seeing belt slippage somewhere. Did you get a new tensioner for the charger? experiment with bigger tensioners.

tried everything and no belt slippage, I have all new parts tensioner pully's the works.