I have started to build a twin kit (S300 & S400) for my truck and now don't think I will have enough fuel. What are some good comp. to get a pump moded or what are some other options.

 

well you could have it calibrated. but i think your best bet would be either buying a 215 cam to have installed in that pump, or I think you can buy a regrind cam from piers and then have your pump shop install it and calibrate your pump for max fuel. (should be able to squeeze 600 cc's)

 

What do the pumps usally run for cc's? Will the 600 make it undrivable on the street?

 

I think a stock 913 (215hp) makes 260-280 cc's? not to sure exactly. mine made 465cc's with a 10 plate laser cut dv's and it was tuned and flowed on a bench with 17mm of rack travel. it will make more without a plate but it will retard timing internally (only 180's and 215's do this) 600 would probably be more than you would want on the street, butwith a valet it would be driveable however not exactly towable. but from the looks of your sig you already have it running 12's so i take it you probably aren't towing much?

 

Nope not towing just racing. I talked to Piers and quetioned them about there pumps but they said that I need a 913 pump before they will work on it. They don't want a 160hp pump as a core

I think that I will try to give schieds a call