924_nick

How are you keeping belts on that thing... it looks like you mounted the m62 to the unibody. Doesn't the motorflex under acceleration cause misalignment issues? It's hard enough to keep belts on when a supercharger is mounted to the motor! Anyway, awesome to see someone get a mercedes kompressor to work on a car that's actually affordable. Those blowers go for ~$300 on ebay - a great deal if you ask me. Do you have the elictronic clutch hooked up to your TPS? Hope you get the fuel situation sorted.
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N1ghtM0nkey

I thought about doing this to an Accord but the obsticle that ended up ruining the whole idea is when I actually looked at the crank pulley and measured, crunched some numbers and even with the smallest S/C pulley I could find on eBay it still probably wouldn't spin fast enough to make any kind of difference.

However if I could get ahold of a custom crank pulley, it would probably be possible. I would call around and ask companies if they could do it but I don't have any money right now

reddevil

The M62 moves .75 liter of air per revolution. The m45 is .5 liter, the M90 is 1 liter and the M112 is 1.25 liter.

The SC is mounted to an aluminium plate which is bolted the the top of the head. Subaru heads are milled flat on top with extra mounting/bolt holes. The I use two idler bearing for tension, max belt wrap, and to keep the belt from flopping/vibration. It does have an electronic clutch, which turns on when vacumn nears atmosperic. For now, I have installed the Vortech without the vacumn line, and reinstalled the old MSD 1-1 regulator in addition. This bumped my base pressure up to about 42-45 and on boost get about 62-65, which is actually about perfect.


I purchased an underdrive pulley off ebay for $60 then took it to a machine shop that specialized in alumium and had them turn a larger pulley and mount it to the existing smaller pulley. Total cost was about $325 OUCH!

Currently I am running a 2-1 pulley ratio, the crank pulley is 7.25 and the SC pulley is 3.625 diameter. Optimal/max pulley ratio is 2.5-1 which means I would have to get an almost 9.25 diameter crank pulley! This would give me about 12-14 psi max.

ososlohatch

i like the duct tape on the intake ....mad hmt style

TorganFM

Thanks reddevil, I knew that. But that doesn't answer my question if there are any other very compact screw chargers like that M63.

reddevil

Yes there are more compact/more efficient superchargers. Lysholm is the main maker of them. But I don't have any photos or links to support this. But.......They are almost ALWAYS way exspensive. They aren't common at all, so they remain pricey, even used.

Whipple uses the Lysholm technology but they are pricy even used,

reddevil

Dynoed today at TorqueFreaks...


Well, I was happy my motor stayed together, but not so happy with the hp improvement.

155 hp and 175 torque on a DynoJet.

I expected a much bigger hp increase due to the extra 3 psi I now pushing, but only gained 3 hp. I did gain 15 torque though.

The torque graph was pretty amazing. 170 torque at 2700 rpm and stayed there until it started dropping at about 5000 rpm. The hp at 2700 was 90 and peaked at 155 at 5500 rpm.

At about 5700 rpm I would either max out the MAF or max out the injectors (or both) and would go dangerously lean. But since I shift right about there anyway and thats where the hp peaks, I am pretty happy.

I suspect I didnt gain as much hp as expected because the motor is lower compression than my first. I don't know how much, but since its not knocking at all at these levels of boost, it must be significanly lower. But then again, I suffer in percentage of hp increase per psi.

Now to just get some more boost.........

saxxu

great job doug!, im sure the c.r. had to do with your hp loss, but in the other hand lower c.r. will be more boost friendly enviroment find a way to make that thing spin harder or just find another SC did you ever considered the SC out of 89-95 supercoupes?

reddevil

Thats an M90, and would give me a 25% increase in boost. Only problem is that I have not comfirmed that the snout of the M62 can bolt to the snout of the M90. The M90 uses a bypass throttle as the SC is spinning 100% of the time, where as mine is only spinning when I want. ie pedal to the metal.

Hey, we rented the dyno there for $400 for 5 hours. I paid $40 for three pulls. I could have paid less but didnt want to screw the guy who was setting it up. If you can get enough people together, its a great deal and a good time.

HMT-Admin

Any other problems with the MAF? I noticed the intake tube was shapped alot differnet than stock? We had alot of problems doing my brothers EJ20T/Vanagon swap when we modified the MAF tube.