[rolorex]

Makes sense - thanks Marc. Any chance you might have the part number handy?

 

[Gouky]

Makes sense - thanks Marc. Any chance you might have the part number handy?

yeah, it's a lotus part number: A132E0102F should be about $160 to buy

 

[Gouky]

Looks *better than* OEM... OEM rarely bothers with anodizing, and in some cases not even with coating steel parts:surprise:

I sincerely appreciate this. honestly the only reason i'm able to take the time and expense to make these parts a higher quality is because you guys are actually buying them and i appreciate that. It also makes things take quite a bit more time sometimes and i appreciate everyone's patience.

I had fun taking the car out for a spin today, it's more or less a rocket ship at this point but it also gave me some time to think about the ECU solution and frankly i'm not thrilled with the fact that the current solution has a U0101 error code and requires an immobilizer. I've got some thoughts on this and i'm going to give them another night to brew but i'll post them up probably tomorrow in the ECU hacking thread.

 

[rolorex]

Great - Thanks as always Marc!

 

[Dr.Pete]

Makes sense - thanks Marc. Any chance you might have the part number handy?

See post #55 for a link to the service bulletin.
It shows the part number for the replacement kit and a breakdown of its contents.

Peter

 

[Gouky]

i wanted to spend some time in the shop today so i made a bracket to mock up the belt routing i'll be using for the rotrex system, figured you guys may like seeing it:

I did run across one major problem though. Pete pointed out that placing the throttle body in front of the supercharger voids the warranty on the supercharger. they make a comment about it sucking in the hoses and that makes sense but in this case there would be no flexible hoes of concern in this application.

I'm going to put some more thought about how to avoid that warranty issue. there is a solution i just don't know what it is yet.

also i did have to bring the supercharger up slightly. this may interfere with the rain gutter a bit but i'm fairly certain the engine lid will still fit.

 

[Dr.Pete]

Is that just a random drive pulley for mock up purposes?
It looks pretty big. Mine is only 85mm...

 

[Gouky]

Is that just a random drive pulley for mock up purposes?
It looks pretty big. Mine is only 85mm...

It's a 95mm pulley, i selected it as the largest one that someone could legitimately want to use on this application. most people will probably end up with a smaller pulley but i need to make sure this one fits.

let me give you guys a few more pictures. the shaft is just there to show where things would go, this isn't the actual drive system at this point:

from the top:

and here's what i mean about the throttle body issue, i was planning on getting a casting made that connected everything together right here:

with the idea being that you could also just clock the supercharger to make it go in a different direction in order to add a charge cooler if desired

Also, if i leave the throttle body after the supercharger i have to deal with the fact that the brake booster does not want to see boost, there's no easy throttled but not supercharged intake region. to tap into.

 

[merryfrankster]

This is great and I'd really like to see this come to fruition! Here's some thoughts in no particular order.

I don't know if all brake boosters are made equal, but my Spyder booster seems to handle a moderate level of boost (up to 12psi) without any problem.

I've done tests on only one Rotrex model, a C30-64 (tiny), and found that intake temps were going north of 200F even at low boost/big pulley (~5psi/105mm) which is to say that an intercooler seemed like a necessity to proceed any higher than that. Every compressor has different efficiency so I don't know what you'd get out of this one.

Are you planning a blow-off valve (or BPV)? The Rotrex literature does suggest it be used.

Can this plastic plenum and the variable runner system handle boost? The plastic 1zz plenum dividers are known to shatter under boost.

PS. What's that stuff all over your engine? Snow?

 

[Gouky]

This is great and I'd really like to see this come to fruition! Here's some thoughts in no particular order.

I don't know if all brake boosters are made equal, but my Spyder booster seems to handle a moderate level of boost (up to 12psi) without any problem.

I've done tests on only one Rotrex model, a C30-64 (tiny), and found that intake temps were going north of 200F even at low boost/big pulley (~5psi/105mm) which is to say that an intercooler seemed like a necessity to proceed any higher than that. Every compressor has different efficiency so I don't know what you'd get out of this one.

Are you planning a blow-off valve (or BPV)? The Rotrex literature does suggest it be used.

Can this plastic plenum and the variable runner system handle boost? The plastic 1zz plenum dividers are known to shatter under boost.

PS. What's that stuff all over your engine? Snow?

I'll run the math on the efficiency map it should be pretty decent though.

initially i wasn't planning a bypass valve (we can't use a BOV with a MAF tune) because the throttle plate in front of the supercharger removes the need but we may not have a choice if we have to put it after the supercharger. if i put one in it'll be a stock style recirculating unit.

the plenum should handle boost just fine. it's a pretty thick unit.

the engine is covered in talk powder, i was trying to get it to scan better for the 3d scanner. it wasn't very successful and i haven't bothered to clean it.

 

[duweeee]

From your old posts there was talk of a new intake manifold to fit regular short stem injectors is that still in the works?

 

[Alex W]

Brake booster sees boost on the stock MKII Turbo setup. I ran my boost gauge off of the brake booster line for years.

 

[Gouky]

From your old posts there was talk of a new intake manifold to fit regular short stem injectors is that still in the works?

i still have drawings for it but right now there are no production plans. they were just too expensive to make. now that i can get castings made this may change but it'll be after the rotrex stuff. I also need to figure out how to change the injector size in the ECU before i dig too deeply into that part.

Brake booster sees boost on the stock MKII Turbo setup. I ran my boost gauge off of the brake booster line for years.

oh! good point. i guess that's one less thing to worry about. Thanks!

 

[Gouky]

So i'm running the numbers and my concern on this is there's several parts before the full rotrex kit comes together. I'm probably going to get the stuff to mount the supercharger and get the upper belt routing stuff done and try to sell that first for the people that are a bit more DIY. Is there anyone that will have interest at that point or only when it's all put together and essentially bolt-on?

 

[Dr.Pete]

I'm interested as long as I can get it to work with my HKS supercharger.
I'm using your lower mount kit to drive it now, but it will require me to run without the engine lid since it mounts up so high.
So this would be a nice solution for me...

 

[monkeyra]

As I still haven't got my harrop yet (!!) if I revert to your rotrex I'll be waiting for the full kit, I need a bolt on solution.

Sent from my SM-G930F using Tapatalk

 

[slideoil]

I'd definitely be interested in buying a bit at a time. I think it would help me afford the kit, while at the same time keep a bit of cash going your way to support development.

Got the lower pulley kit in yesterday. As expected, it is a piece of art. Thanks for all the work you put in.

 

[donteatbugs]

Ill be waiting on all of it because I just bought a house. I would likely get a whole kit though.

 

[immorality]

I'd definitely be interested in buying a bit at a time. I think it would help me afford the kit, while at the same time keep a bit of cash going your way to support development.

I agree with this. I'm a bit strapped for cash right now, but a little here and there I can do.

 

[merryfrankster]

The heavy lifting for this kit is definitely the pulley set and the turbine mount. The rest - intercooler and intake, Rotrex oil cooler and reservoir, would be DIY'able for me. With that said I'm on the fence, still haven't made my decision whether to go SC, go turbo, or keep the car as is, simple and reliable.