back story: I bought my car years ago stock, with an exhaust. Added a few things to it, like a 2.65 motoblue upper, accufab SBTB and plenum, bassani 5 piece X. changed out the borla Stingers to bassani. changed out some ghetto cold air when I didn't know any better to a jlt. Car made 474/495 on a DJ in 2008. car ran 11.80's consistent at 117.5-118.5 on 18" kdw2's. eventually got it down to 11.66@ 119. highest mph was 120.6. that is a full weight 03 vert, 6 speed and IRS. Never launched on good tires or above 1600rpm due to the IRS not being built. It was a street cruiser, nothing special when everyone was running 10's at the time. Blower had never been off the car and it only ever had an upper only on it.
I bought a polished used steg mystery port. someone ran it without oil and chewed the gears up. bought another blower and installed new rotors in it. never had the car dyno'd at this point, but had a mail order tune (circa 2009) car lost tq and mph was 124ish... pulled the blower off to send to posi, but he didn't want to waste a race port on the hacked stag blower. the outlet was so huge it wasn't worth messing with. I put things on hold for a few years as life happened and it got put on hold. I almost sold the car a couple of times to help pay for a house down payment........when I finally got back into it, posi was done and some people were stealing his work and all those awesome helpful DIY pics were pulled down.. I talked with Brian numerous times about DIY porting and this lead me to do my own.....
Anyways, I had a couple blowers, a buddy had a screwed up case and I just started playing with it and toying with the idea of welding some here and there to make use of the blowers I had. I used the junk case as a test mule to see where the limits of the case were and started welding with archaic aluminum stick rod. it works, but it is not pretty and quite the pain in the ass to work with. you have to grind the flux off after each weld..
now, since posi had been around, the dragon TB was the only one to use in many peoples eyes... there was two reasons for this. the TB was the same width as the accufab tb, but the height was taller. it looked like a football compared to a oval. the biggest restriction with the reason the accfufab didn't make much more power than the ported stock tb was due to the plenum. the stock and accufab plenum ended at the edge of the bolt holes in the case and there wasn't enough material to flow what the blower needs. the dragon plenum goes to the edge of the blower case. side by side, the accufab flows 3-5 cfm less than the dragon without a plenum attached... with the plenum attached, the flow decreased on the accufab by almost 50cfm... that's why the dragon was always the highest producing tb out there...
My goal is to make big power with an eaton and using an accufab tb... I could have just done a H122 swap, but didn't want the look of the passenger side blower, also didn't want to buy a stupid expensive adapter plate (8-900 at the time) to run it. And I'm just stubborn and don't think anyone has completely tested the limits of the m112, plus it was a long time goal to make more power than the pathetic steg port.
so here goes, there will be lots of pics.
first was some outlines. The dragon is not marked in this picture but the dragon plenum edge extends the the edge of the blower case. the dragon inlet is the size of the posi outline. (thats how it was traced off of a posi ported dragon)
I welded a chunk of aluminum to the right side of the inlet.. in this pic steg mystery port on left (stage 2 or stg3) compared to my hack job. I wasn't worried about the appearance of the weld as it would be ground down to resemble stock when it was all said an done..
after lots of cutting, I popped through a couple places, so some weld was added to the outside of the long turn radius
I also popped though the bottom, trying to cut the lead in as deep as possible... a little weld was added...
at this point, with is a rough outline of where I was at
or in a better perspective.... accufab gasket:
I knew I'd have to modify a plenum, I just didn't know what I wanted to proceed with. I bought another accufab plenum, a vmp plenum and a H122 (gt500 commonly called m122) plenum..
VMP mysteriously fits the same pattern and profile.... hmmmm
I also picked up a h122 blower, so I now had the m112 inlet, h122 inlet and vmp to play with..
I bought a polished used steg mystery port. someone ran it without oil and chewed the gears up. bought another blower and installed new rotors in it. never had the car dyno'd at this point, but had a mail order tune (circa 2009) car lost tq and mph was 124ish... pulled the blower off to send to posi, but he didn't want to waste a race port on the hacked stag blower. the outlet was so huge it wasn't worth messing with. I put things on hold for a few years as life happened and it got put on hold. I almost sold the car a couple of times to help pay for a house down payment........when I finally got back into it, posi was done and some people were stealing his work and all those awesome helpful DIY pics were pulled down.. I talked with Brian numerous times about DIY porting and this lead me to do my own.....
Anyways, I had a couple blowers, a buddy had a screwed up case and I just started playing with it and toying with the idea of welding some here and there to make use of the blowers I had. I used the junk case as a test mule to see where the limits of the case were and started welding with archaic aluminum stick rod. it works, but it is not pretty and quite the pain in the ass to work with. you have to grind the flux off after each weld..
now, since posi had been around, the dragon TB was the only one to use in many peoples eyes... there was two reasons for this. the TB was the same width as the accufab tb, but the height was taller. it looked like a football compared to a oval. the biggest restriction with the reason the accfufab didn't make much more power than the ported stock tb was due to the plenum. the stock and accufab plenum ended at the edge of the bolt holes in the case and there wasn't enough material to flow what the blower needs. the dragon plenum goes to the edge of the blower case. side by side, the accufab flows 3-5 cfm less than the dragon without a plenum attached... with the plenum attached, the flow decreased on the accufab by almost 50cfm... that's why the dragon was always the highest producing tb out there...
My goal is to make big power with an eaton and using an accufab tb... I could have just done a H122 swap, but didn't want the look of the passenger side blower, also didn't want to buy a stupid expensive adapter plate (8-900 at the time) to run it. And I'm just stubborn and don't think anyone has completely tested the limits of the m112, plus it was a long time goal to make more power than the pathetic steg port.
so here goes, there will be lots of pics.
first was some outlines. The dragon is not marked in this picture but the dragon plenum edge extends the the edge of the blower case. the dragon inlet is the size of the posi outline. (thats how it was traced off of a posi ported dragon)
I welded a chunk of aluminum to the right side of the inlet.. in this pic steg mystery port on left (stage 2 or stg3) compared to my hack job. I wasn't worried about the appearance of the weld as it would be ground down to resemble stock when it was all said an done..
after lots of cutting, I popped through a couple places, so some weld was added to the outside of the long turn radius
I also popped though the bottom, trying to cut the lead in as deep as possible... a little weld was added...
at this point, with is a rough outline of where I was at
or in a better perspective.... accufab gasket:
I knew I'd have to modify a plenum, I just didn't know what I wanted to proceed with. I bought another accufab plenum, a vmp plenum and a H122 (gt500 commonly called m122) plenum..
VMP mysteriously fits the same pattern and profile.... hmmmm
I also picked up a h122 blower, so I now had the m112 inlet, h122 inlet and vmp to play with..
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