als777on Posted October 18, 2008 Report Share Posted October 18, 2008 Hi I'm thinking about upgrading to the mp122 but do not know if it would be the right move? Looking to see if anyone that has the mp122 on there truck now that can tell me Performance Differences. Horsepower and Torque and anything else would be helpful. Quote Link to comment Share on other sites More sharing options...
RICE EATER Posted October 21, 2008 Report Share Posted October 21, 2008 thought about this myself... im curious what the price is for the upgrade.. ive heard a few differnt things Quote Link to comment Share on other sites More sharing options...
eddieo818 Posted October 21, 2008 Report Share Posted October 21, 2008 i think the mp122 really pushes the 6.0 to its limits but it must be fun!! mp122 FTW!! Quote Link to comment Share on other sites More sharing options...
zippy Posted October 21, 2008 Report Share Posted October 21, 2008 There are a few on here running them. Expect about a 2psi gain in boost over what you have right now with the same pulley size. I've seen an LQ9 repeatedly handle over 20psi of boost with good valve springs. The MP122 isn't going to push it to the limit, but it will make alot of power with it. The MP122 is a good match with a 6.0L for a street/strip truck. Quote Link to comment Share on other sites More sharing options...
als777on Posted October 22, 2008 Author Report Share Posted October 22, 2008 There are a few on here running them. Expect about a 2psi gain in boost over what you have right now with the same pulley size. I've seen an LQ9 repeatedly handle over 20psi of boost with good valve springs. The MP122 isn't going to push it to the limit, but it will make alot of power with it. The MP122 is a good match with a 6.0L for a street/strip truck. OK zippy first off I'd like to thank you for all your help tune is great. So now on to this supercharger thing would it be better just to keep what I have and do a cam install. Was thanking about cam,fuel injectors and a 90mm Tb. The reason for thinking about the mp122 is my rpm gets maxed out and and the truck will shut down for a second or two. would like to get to 10psi I'm now at 6psi Quote Link to comment Share on other sites More sharing options...
rgp6373 Posted October 22, 2008 Report Share Posted October 22, 2008 (edited) i have a mp122h on my 403 and even with a 2.9 pulley it cant keep up only getting about 7psi for boost Edited October 22, 2008 by rgp6373 (see edit history) Quote Link to comment Share on other sites More sharing options...
als777on Posted October 22, 2008 Author Report Share Posted October 22, 2008 i have a mp122h on my 403 and even with a 2.9 pulley it cant keep up only getting about 7psi for boost Hi is the Performance same or is it dirfrent then the mp112? Quote Link to comment Share on other sites More sharing options...
rgp6373 Posted October 25, 2008 Report Share Posted October 25, 2008 the 122 does better than the 112 but does not push enough air for my motor alot more mid range from the 122 but like the 112 it runs out of breath on the top end Quote Link to comment Share on other sites More sharing options...
supersub Posted October 25, 2008 Report Share Posted October 25, 2008 (edited) I think the 122 in its original form has its limitations for higher horsepower applications. Now take that same blower and vert to the front inlet rear drive set-up,increase the boost moderatly you will have a considerable jumpin power all the way up. Well past your expectations of the current offering. see the sig its a 122hh on 7.0 @13psi and on only its second 1/4 mile pass pushed into the 12's and my rig ways 6500lbs. imagine what that would feel like on a 6.0 with 5300lbs??? Edited October 25, 2008 by supersub (see edit history) Quote Link to comment Share on other sites More sharing options...
als777on Posted October 25, 2008 Author Report Share Posted October 25, 2008 I think the 122 in its original form has its limitations for higher horsepower applications. Now take that same blower and vert to the front inlet rear drive set-up,increase the boost moderatly you will have a considerable jumpin power all the way up. Well past your expectations of the current offering. see the sig its a 122hh on 7.0 @13psi and on only its second 1/4 mile pass pushed into the 12's and my rig ways 6500lbs. imagine what that would feel like on a 6.0 with 5300lbs??? Great thanks for the input guys ! Quote Link to comment Share on other sites More sharing options...
moregrip Posted October 30, 2008 Report Share Posted October 30, 2008 I get 10psi out of my 122 rather quickly with an 8" crank pulley 3.0 blower pulley Quote Link to comment Share on other sites More sharing options...
most-hated Posted August 24, 2009 Report Share Posted August 24, 2009 where can i get a bigger crank pulley Quote Link to comment Share on other sites More sharing options...
JSTAL Posted August 25, 2009 Report Share Posted August 25, 2009 i have a mp122h on my 403 and even with a 2.9 pulley it cant keep up only getting about 7psi for boost well your cubes hurt that but its like sub said you cant spin that 122 fast enough unless you go jack shaft. the upgrade is like a grand i believe Quote Link to comment Share on other sites More sharing options...
sprayed99 Posted August 25, 2009 Report Share Posted August 25, 2009 well your cubes hurt that but its like sub said you cant spin that 122 fast enough unless you go jack shaft. the upgrade is like a grand i believe lol read the date there Jason. Quote Link to comment Share on other sites More sharing options...
caddy03pimpin Posted August 26, 2009 Report Share Posted August 26, 2009 sup man whats the comp on your 403 ??? Quote Link to comment Share on other sites More sharing options...
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