Originally Posted by
05srtsix
Super fast reply from Eurocharged.
"Yes sir! We have them in stock. Pulley/tune on a SRT6 is about a 50 wheel gain.
Just FYI, we strongly recommend injectors with the 62mm pulley. It tends to run out of injector in the last 1000 RPM."
So to answer my question, fuel mods will be necessary (IMO) to run the 62 mm.
The Dyno charts on their websites show a gain about 46 whp, so does that mean going from 65mm to 62 is only good for about 5 whp? I sent them another email as well.
Anyone who ups the boost should add a wideband O2 sensor and gauge, THAT will tell you when to add fuel upgrades. I am using 550cc injectors and it can go a little leaner than I like in the high rpm range in 3rd gear. I shoot for an 11.5:1 AFR for somewhat of a safety factor as I am running a tune for 450cc injectors with some extra timing.
I might try 67mm on the stock SC wheel. $90. for a stock STEEL pulley against an aluminum pulley(65mm) at $650. with tune and OBDII cable makes great sense. research and make a decision based upon fact as all motors are a bit different and of course we are at different climates/altitudes etc.
The injectors were on ebay and billy22bob got a set for 185. on a best offer sale. I paid the $210. or so. between the injectors and exhaust my idle is very smooth without a miss. Good luck!