Anyone running a RMS S/C on a swap car?

[rneedham1979]

PM'ed.

I had to have my upper radiator hose modified as it was rubbing the supercharger tensioner. Not sure about the heat exchanger, I know there are a few guys running large intercoolers without any issues so you may be able to squeeze the RMS heat exchanger in there. My car does NOT have ABS but I am planning on reinstalling it when I get a chance. The intake tube fits nicely and looks stock. I am not sure how it fits in the E36 but the tube goes from the blower to the maf and then to the filter. It sits just behind the fog light.

You will have to play with the aftercooler, mine was barley rubbing the master cylinder, which resulted in a very annoying rattle. Just moved the aftercooler out 2mm or so and the rattle was gone.

When are you planning the install?

If you run into any issues I can send you pics of my set up etc.

good luck!

Its OBD1 S52
RMS stg 2 V2 t trim obviosly w/ the rms heat exchanger (may have to go to cobra or lightning for space issues)
42lb inj
Porsche maf
6" crank
3.12 or 3.33 sc pulley cant remember.
PM me on that Nick G tune, maybe it will match up.
The only things I am worried about are the coolant overflow (may have to relocate), ABS pump and the top radiator hose and overflow. All workable to get around but hoping I can play around with the intake and maybe even route it under the blwer instead of over, we shall see.

[sharky]

Its OBD1 S52
RMS stg 2 V2 t trim obviosly w/ the rms heat exchanger (may have to go to cobra or lightning for space issues)
42lb inj
Porsche maf
6" crank
3.12 or 3.33 sc pulley cant remember.
PM me on that Nick G tune, maybe it will match up.
The only things I am worried about are the coolant overflow (may have to relocate), ABS pump and the top radiator hose and overflow. All workable to get around but hoping I can play around with the intake and maybe even route it under the blwer instead of over, we shall see.

[rneedham1979]

Hey man,

When are you doing the install? Are you OBDII? I can take pictures and send you info if you need it. My heat exchanger is different so I am not sure what you will have to do to make it fit. You shouldn't have any issues making well over 450whp. If you decide to run less boost, let me know as I have 4-5 blower pulleys.

What do you have in addition to Dave's kit?

If you want to keep it around 400whp and plan on running OBDI, I have a Nick G tune.

You will love it man, the car is really fun with 400whp+

No this was M3Jaspers personal kit on the car with threads on BFC documenting. He sold it a while ago (2years) to the guy I bought it from that had never installed as he blew the motor before install (money shift) There were a couple additions with his 500whp kit but this was the base kit. I was hoping to get more info instead of a pissing match but oh well.

[sharky]

No this was M3Jaspers personal kit on the car with threads on BFC documenting. He sold it a while ago (2years) to the guy I bought it from that had never installed as he blew the motor before install (money shift) There were a couple additions with his 500whp kit but this was the base kit. I was hoping to get more info instead of a pissing match but oh well.

[matt]

Dave (M3Jasper) runs a shop so I wouldn't be surprised if he's sold a lot of SC kits over the years. :)

[rneedham1979]

M3Jasper actually sold his stuff a long, long time ago hence my question. I asked because i did not know there was another guy who had broke the 500whp with the CF. Awesome post though, you continue to impress.

OP good luck with your decision, there is far to much misinformation on the thread to make a educated choice. I highly recommend you do a search for TS on BFC and read through the 10-15 threads discussing the twin screw there is a bunch of good info discussing pros and cons. Good luck!


E30polak- Good stuff.

Dude, youre on bfc.FI all the time. I only know cause I see you starting the same lame threads over there as you do here. How did you miss M3Jasper's quest and successful achievement of +500rwhp on a CF setup? For someone trying to achieve the same thing you think you would know all about his setup.

[triggrhaapi]

Um....matt works for/ownes/tunes for TRM. I think he knows how to tune these better than you would, no offense.

I don't take any offense. Having once built a 427whp Supra TT on stock turbos, I would think I'm at least qualified to be in the discussion here. You don't know me from adam.

[triggrhaapi]

Seems like... maybe. But it isn't. Controlling the turbocharger is all mechanical, or done by an electronic boost controller. All the tune has to do is deal with the turbocharger's consequences.

Right, but with a turbo, there is MASSIVE variance in pressure. A turbo has to spool when you're off boost, so the computer has way more on it's plate in terms of partial throttle than a supered car or n/a car. The hard part of a turbo car is NOT the WOT tuning, it's the partial throttle stuff.

In terms of a supered car versus a turbo car, partial throttle on a supered car is much more like an n/a car becuase there is no pressure variance, the super is working EXACTLY as hard regardless of what your foot is doing. Supers don't take breaks.

Sure, in terms of WOT maps a supered car is more like a turbo car than not. WOT maps are the easy (er) part of tuning. Having built a Supra TT back in the day, I know all about that. I'm not an expert and I don't do it for a living, but I know more than nothing by a significant margin.

This is mostly correct, but exactly UNLIKE an NA car.

The only difference between a supered and n/a car is pressure instead of vacuum. All other things are identical. Cam timing is a different game, ignition timing is a different game. All of the similarities, as I said, between turbo and super have to do with WOT tuning, which is, as I said, the easy part.

You could, but a MAF is better.

But you can't do that with a turbo car can you? As you think about what I meant when I said what I did to initiate this discussion, think about why you can't very well Alpha N a turbo car.

I'm not trying to knock on you at all, nor am I trying to start a pissing contest. I'm also not an idiot. I honestly respect you, I just think you misunderstood my meaning, and got a bit ahead of yourself.

[matt]

In terms of tuning, it seems like it would be more like an N/A motor than like a turbo motor. There's no wastegate control for one, there's no boost targeting, none of that. All of what makes turbo tuning complicated is related to controlling the turbocharger and how it produces boost.

Seems like... maybe. But it isn't. Controlling the turbocharger is all mechanical, or done by an electronic boost controller. All the tune has to do is deal with the turbocharger's consequences.

With a supercharger, at any given RPM, it's going to have the same amount of air being displaced every time, with the only intake variations being air density as metered by MAF and the throttle position.

This is mostly correct, but exactly UNLIKE an NA car.

Hell, I'll bet you that with a P/D, you could Alpha N tune a supered car if you were clever enough.

You could, but a MAF is better.

Yeah I think Matt and TRM know abit more than anyone on here about the tuning, thats why I am picking them for my tune, that and they are good to deal with and I like my NA tune from them.

Thanks!

[sharky]

Yeah I think Matt and TRM know abit more than anyone on here about the tuning, thats why I am picking them for my tune, that and they are good to deal with and I like my NA tune from them.

[Bimmerman325i]

In terms of tuning, it seems like it would be more like an N/A motor than like a turbo motor. There's no wastegate control for one, there's no boost targeting, none of that. All of what makes turbo tuning complicated is related to controlling the turbocharger and how it produces boost.

With a supercharger, at any given RPM, it's going to have the same amount of air being displaced every time, with the only intake variations being air density as metered by MAF and the throttle position.

Hell, I'll bet you that with a P/D, you could Alpha N tune a supered car if you were clever enough.

Um....matt works for/ownes/tunes for TRM. I think he knows how to tune these better than you would, no offense.

[triggrhaapi]

Right, but it's not that simple. Not by a million miles.

NOTHING like an NA motor.

In terms of tuning, it seems like it would be more like an N/A motor than like a turbo motor. There's no wastegate control for one, there's no boost targeting, none of that. All of what makes turbo tuning complicated is related to controlling the turbocharger and how it produces boost.

With a supercharger, at any given RPM, it's going to have the same amount of air being displaced every time, with the only intake variations being air density as metered by MAF and the throttle position.

Hell, I'll bet you that with a P/D, you could Alpha N tune a supered car if you were clever enough.

[e30polak]

You mean water/methanol right? I'm pretty sure that methamphetamine won't cool your car.

BTW, straight methanol injection will make your combustion temps higher in my experience. You want at least some water in there to cool the intake charge and scavenge some kinetic energy from that heat.

I'll do whatever Osh recommends.

[matt]

It IS true with a twin screw, it is NOT true with a centrifugal. Well, at least if it's directly driven. If you use a viscous transmission, then it's PSI based and the super doesn't make the same number of revolutions per engine revolution at any given RPM.

However, a twin screw WILL displace a specific amount of air per S/C rev. That's why their size is measured in liters.

Right, but it's not that simple. Not by a million miles.

NOTHING like an NA motor.

[triggrhaapi]

You mean water/methanol right? I'm pretty sure that methamphetamine won't cool your car.

BTW, straight methanol injection will make your combustion temps higher in my experience. You want at least some water in there to cool the intake charge and scavenge some kinetic energy from that heat.