Originally Posted by
austinbarrylee
Ok I am ignorant to this supercharger situation. According to you, in order to double stack correctly with Code 3 and 178mm. I need to buy a new fuel pump and injections. Which I stated the prices. If I take off the Code 3 and just put 178mm system from Needswings it cost a little more. When double stacking don't I need to buy 178mm parts.
Changing out the crank pulley was the "original" way to increase performance before the various smaller supercharger pulleys started becoming available. "Stacking" or running "stacked" is using one of the larger crank pulleys (178mm, 181mm or 185mm) AND also using a smaller supercharger pulley.
I put in blue in the chart below what you're thinking of doing . . . you say you have the 178mm crank pulley and want to go stacked by installing a 65mm Code 3 supercharger pulley . . . That's pretty aggressive . . . You would definitely need the SL55 fuel pump, the adjustable fuel pressure regulator and
possibly the larger fuel injectors. I'm not an expert in this area . . . I know just enough to be dangerous. I would strongly suggest, however, that when getting to that level of engine mods you'll need to be able to monitor your AFR (among other engine stats) to be sure you don't run lean and damage your engine.
It took me a while to find this chart . . .
It's in post #268 by Billy22Bob in this thread
https://www.crossfireforum.org/forum...lable-now.html
-----pulleys----------rwhp-----air intake-----fuel-------fuel-----------fuel --------Cooling required---MAP*
------------------------------------cfm--------g/sec----cc/inj/min----lb/inj/min-----kBTU/hr----kW----- psi
Stock---74/155-------
290---------649--------30.4--------476---------45.3--------------37------11--- 13.4
DCAI ---74/155-------
297---------665--------31.2--------488--------46.5---------------42------12--- 14.1
ECStock-65/155------
316---------734--------34.5--------539---------51.3--------------61------18--- 17.1
62Stock-62/155------
326---------768--------36.1--------564---------53.7--------------71------21--- 18.5
62DCAI-62/155-------
337---------791--------37.2--------581---------55.3--------------78------23--- 19.5
65DCAI-ASP-65/178-359---------866--------40.7--------635---------60.5-------------102------30--- 22.7-----STACKED! 328kW (437hp) Crank - sub 11 sec 1/4mile car
62DCAI-ASP-62/185-
371---------907--------42.6--------665---------63.4-------------116------34----24.5-----STACKED..339kW (452hp) Crank -
Missile Status
Anyone more knowledgeable than I (that is likely almost everyone) should please chime in here . . .