Cheap supercharger kit: Part II
09-04-2011, 11:16 AM
#1
Cheap supercharger kit: Part II Heres a project Ive been working on for quite a while
Eaton M122 off a 2009 Shelby GT500 on a LSx engine
Some of you may remember my last build using an older M90 on a 5.3 which netted about 60hp over stock. The instant torque was fun but it just needed a little more
Comparison
Basic fitment
Cutting a base plate from 1/4" steel
Designing a tight fitting balancer hub and stand off to use common parts. 6 rib accessory drive remains the same with a generic SBC 10 rib crank pulley as close to the block as possible
Rough model to gauge fitment. It was later amended to move the front plate up one bolt hole and add a second plate to hold and idler to clear the water pump bell. Tensioner is the standard that come with truck maggy kits that most guys upgrade. Its actually a diesel part. Pulley was swapped for a procharger smooth idler wide enough for my belt
Balancer hub came back from the machine shop. Hub is 4130 while the centering ring and stand off are aluminum
Building the brackets, keeping everything true
Rear brace. Those bolt holes in the cyl heads are sure handy
Building the collector hat. The tube running towards the rear connects the bypass butterfly to the charge pipe so the stock actuator can be used. The external unit for the M90 was a pain
Beginning the front plates checking belt alignment. From the last build I found that a serp belt can handle about .030" and .5* of misalignment before it will throw and/or chew a belt. Since this belt is about $60, thats a bit expensive to tweak afterwards. Had to be dead on from the start this time
How much room I have to work with
Plates finished and HD belt installed
Decent sized inlet
And its in there
Had to notch a plate for hood clearance, thats about 5/8"
Ford 8.8 conversion, calipers were painted later. Not sure whats up with the yellow
Fuel system
And thats about it
Rolling into the throttle from a stop. Long 1st and 2nd from the 80E. Boost comes in approx 40%
Hammering it from around 35
Eaton M122 off a 2009 Shelby GT500 on a LSx engine
Some of you may remember my last build using an older M90 on a 5.3 which netted about 60hp over stock. The instant torque was fun but it just needed a little more
Comparison
Basic fitment
Cutting a base plate from 1/4" steel
Designing a tight fitting balancer hub and stand off to use common parts. 6 rib accessory drive remains the same with a generic SBC 10 rib crank pulley as close to the block as possible
Rough model to gauge fitment. It was later amended to move the front plate up one bolt hole and add a second plate to hold and idler to clear the water pump bell. Tensioner is the standard that come with truck maggy kits that most guys upgrade. Its actually a diesel part. Pulley was swapped for a procharger smooth idler wide enough for my belt
Balancer hub came back from the machine shop. Hub is 4130 while the centering ring and stand off are aluminum
Building the brackets, keeping everything true
Rear brace. Those bolt holes in the cyl heads are sure handy
Building the collector hat. The tube running towards the rear connects the bypass butterfly to the charge pipe so the stock actuator can be used. The external unit for the M90 was a pain
Beginning the front plates checking belt alignment. From the last build I found that a serp belt can handle about .030" and .5* of misalignment before it will throw and/or chew a belt. Since this belt is about $60, thats a bit expensive to tweak afterwards. Had to be dead on from the start this time
How much room I have to work with
Plates finished and HD belt installed
Decent sized inlet
And its in there
Had to notch a plate for hood clearance, thats about 5/8"
Ford 8.8 conversion, calipers were painted later. Not sure whats up with the yellow
Fuel system
And thats about it
Rolling into the throttle from a stop. Long 1st and 2nd from the 80E. Boost comes in approx 40%
Hammering it from around 35
09-04-2011, 12:28 PM
#7
TECH Junkie
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that speedo is way off , and why does it sound like a fire horn , cobras dont sound like that when off throttle .
and sorry for those questions , awesome workmanship .
and sorry for those questions , awesome workmanship .
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09-04-2011, 01:31 PM
#12
Sick build man! I'm guessing you do engineering work?
that speedo is way off , and why does it sound like a fire horn , cobras dont sound like that when off throttle .
and sorry for those questions , awesome workmanship .
and sorry for those questions , awesome workmanship .
Whine is from the TB behind down stream from the blower. 99% of roots setups are at the inlet, so you almost never hear this until one is mounted remote like this. If I moved it to the inlet it'd sound just like a cobra
09-04-2011, 07:33 PM
#16
Nice work, but you have one problem with it and I even heard it in your vids. The belt tensioner is on the wrong side of the belt load. It should be on the slack side, not the tension side. So as you put a load on it, its pulling the belt strait and slacking the back side slipping the belt and then you let off the gas and you can hear the belt squeal as it speeds up the blower.
09-04-2011, 10:43 PM
#18
Nice work, but you have one problem with it and I even heard it in your vids. The belt tensioner is on the wrong side of the belt load. It should be on the slack side, not the tension side. So as you put a load on it, its pulling the belt strait and slacking the back side slipping the belt and then you let off the gas and you can hear the belt squeal as it speeds up the blower.
