zippy Posted April 17, 2007 Report Share Posted April 17, 2007 Recomendations: MP112 Radix kit for those looking for an emissions legal direct bolt on kit. This will get you into the 13's without any other mods. With mild modification you can get into the 12's and with a considerable amount of mods, time, money, and experience, 11's are achievable. It is highly recomended to buy the MP 122 kit if you are planning for modifications down the road. I highly recomend the MP112 and the MP112HH for 4.8L and 5.3L applications, but for the 6.0L and 6.7L, the MP122 should certainly be considered as the best option. If you own an 04' and newer with a Radix you will need bigger injectors if you have a blower pulley size of less than 3.0". Pulley size -Belt Size -Boost psi.(apx.) - Goodyear# - Gates# 2.75" Pulley = 111.0 " Belt = 9 to 10 psi. - P/N=4061110 - P/N=K061110 2.8" Pulley = 111.0 " Belt = 8.5 to 9 psi - P/N=4061110 - P/N=K061110 2.9" Pulley = 111.5 " Belt = 7.5 to 8 psi. - P/N=4061115 - P/N=K061115 3.0" Pulley = 111.5 " Belt = 7.0-7.5 psi. - P/N=4061115 - P/N=K061115 3.1" Pulley = 112.0 " Belt = ---6--- psi. - P/N=4061120 - P/N=K061120 3.3" Pulley = 112.0 " Belt = 5 to 6.5 psi. - P/N = 4061120 - P/N=K061120 Belt sizing info is only for trucks with all stock idler setups for Radix applications. Quote Link to comment Share on other sites More sharing options...
FastCrewCab Posted June 2, 2007 Report Share Posted June 2, 2007 Those #'s are very accurate. I have a 6.0L and have run a 3.4", 3.2" and now a 3.0" and those pressures are exactly right. ( Stock H/C with Headers) Quote Link to comment Share on other sites More sharing options...
eamonnschevy Posted July 12, 2007 Report Share Posted July 12, 2007 thanks for the info Zippy any idea what size injectors i need with a 2.9 pully? thanks in advance eamonn my truck is running a bit lean an bank 2 could this be the problem? eamonn Quote Link to comment Share on other sites More sharing options...
Vortec MAX Posted July 12, 2007 Report Share Posted July 12, 2007 That is good info! Sure beats the heck out of guessing. Thanks Zippy. I am getting closer to buying a Radix every day. I still can't decide which one to get. Has anyone had issues running a 122H on a stock engine? Mike Quote Link to comment Share on other sites More sharing options...
zippy Posted July 24, 2007 Author Report Share Posted July 24, 2007 That is good info! Sure beats the heck out of guessing. Thanks Zippy. I am getting closer to buying a Radix every day. I still can't decide which one to get. Has anyone had issues running a 122H on a stock engine? Mike Not that I know of, it certainly isn't too big for it though if you have a 6.0L. Quote Link to comment Share on other sites More sharing options...
SoCalSS Posted August 27, 2007 Report Share Posted August 27, 2007 Not that I know of, it certainly isn't too big for it though if you have a 6.0L. Zippy, I just installed my 111.5" belt on a 3.0 pulley. And it was tighter and harder to fit than a..., well you fill in the blank. Is there anything wrong with going 112.0" on a 3.0 pulley? Quote Link to comment Share on other sites More sharing options...
zippy Posted October 11, 2007 Author Report Share Posted October 11, 2007 TTT Quote Link to comment Share on other sites More sharing options...
zsamboki Posted October 13, 2007 Report Share Posted October 13, 2007 I am also interested in what injectors to run with a 3" and smaller Quote Link to comment Share on other sites More sharing options...
SlowSierraSS Posted October 13, 2007 Report Share Posted October 13, 2007 I bought my truck with the magna on it and was wondering if there was a quick way to tell which one it is. Sorry im new to the supercharger info I am used to turbos. Quote Link to comment Share on other sites More sharing options...
detjoe Posted October 14, 2007 Report Share Posted October 14, 2007 I bought my truck with the magna on it and was wondering if there was a quick way to tell which one it is. Sorry im new to the supercharger info I am used to turbos. you have a 112, the 122 were just released. Quote Link to comment Share on other sites More sharing options...
SSThunder Posted April 28, 2008 Report Share Posted April 28, 2008 bump to the top. Good info to know. Quote Link to comment Share on other sites More sharing options...
stroked out Posted April 28, 2008 Report Share Posted April 28, 2008 Zippy Im going a radix route. IM looking for a good streetable truck. My set up now cost to much to mentain and im not haveing to much fun. After reading alot of post here I think the radix is the way to go. First off thanks for the info, Secondly, the 122H you said its good for the 6.0L what power gains would result from using this charger comparied to the 112? How much boost is to be expected aswell? Quote Link to comment Share on other sites More sharing options...
Krambo Posted March 1, 2011 Report Share Posted March 1, 2011 Bump for someone needing the info in this thread Quote Link to comment Share on other sites More sharing options...
RockHead Posted March 2, 2011 Report Share Posted March 2, 2011 Bump for someone needing the info in this thread :cheers: Quote Link to comment Share on other sites More sharing options...
DGIEPSS Posted September 3, 2011 Report Share Posted September 3, 2011 good info here Quote Link to comment Share on other sites More sharing options...
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