will a stage 1 SC really have 10 lbs at 6000 feet?

[snowfix]

I've been reading forums from here and Snowest and now i'm concerned about what a stage I SC will do at higher elevations. The Dyno results from MPI say 240 hp at 10 PSI at sea level right? And that is the highest gear ratio/impeller speed the stage 1 SC can handle? It was posted that you lose 1/2 pound per 1000 feet so does that mean when that same supercharger gets to 6000 feet the boost will be down to 7 lbs?


I'm probably wrong (happens often) but before I spend my kids college fund I want to make sure i'm getting the best bang for their buck!

 

[Mud Nutts]

I've been reading forums from here and Snowest and now i'm concerned about what a stage I SC will do at higher elevations. The Dyno results from MPI say 240 hp at 10 PSI at sea level right? And that is the highest gear ratio/impeller speed the stage 1 SC can handle? It was posted that you lose 1/2 pound per 1000 feet so does that mean when that same supercharger gets to 6000 feet the boost will be down to 7 lbs?


I'm probably wrong (happens often) but before I spend my kids college fund I want to make sure i'm getting the best bang for their buck!

They dynoed this kit at 5000ft not sea level. My Stage one Kit will be in my hands this Wednesday. The kit is complete except for the ECU programming. I should have that in a couple of weeks. I guess they are putting the final touches on the EFI system. I am fully confident this kit will rock. I will keep you posted.

 

[Mud Nutts]

I've been reading forums from here and Snowest and now i'm concerned about what a stage I SC will do at higher elevations. The Dyno results from MPI say 240 hp at 10 PSI at sea level right? And that is the highest gear ratio/impeller speed the stage 1 SC can handle? It was posted that you lose 1/2 pound per 1000 feet so does that mean when that same supercharger gets to 6000 feet the boost will be down to 7 lbs?


I'm probably wrong (happens often) but before I spend my kids college fund I want to make sure i'm getting the best bang for their buck!

They dynoed this kit at 5000ft not sea level. My Stage one Kit will be in my hands this Wednesday. The kit is complete except for the ECU programming. I should have that in a couple of weeks. I guess they are putting the final touches on the EFI system. I am fully confident this kit will rock. I will keep you posted.

 

[snowfix]

Thanks Mud Nutts,


Now I feel better. For a minute there I thought I was going to have to throw a summers worth of research out the window. Are you going to the sled show in Edmonton? I think Speciality Sleds is an SC dealer and I was hoping to get a peak at one.

 

[KbxSrx]

no, they arent, but we will hopefully have 2 kits there, E&S and Alberta Cycle.

If anyone wants to meet up, I am working there Saturday for sure, maybe Friday evng, call me at 780-745-2006, I will have my cell there.
Ken

 

[HAMMER]

SUPERABE said they saw "9 to 9.5 at 9,000 feet" Stage-I but didn't give any details on setup, engine rpm, pulley ratios, initial boost setting, fuel, etc...

Results from my research:

Stage-I SC compressor specs

Internal drive multiplication is 12.7:1
Max input rpm 13,200
Max impeller speed is 167,600
Max flow 302 CFM @ 65% efficiency and 253 CFM @ 71% efficiency

Example: Stock RX-1 engine pulled 185 CFM at max hp (DynoTech)

Compressor maps indicate: (approximate)

BoonDockers GT25 (405 CFM @ 60%)
CPR GT25 (405 CFM @ 60%)
MCX TDH04-16T (435 CFM @ 65%)
MPI Stage-II (450 CFM @ 65%)
Bender Stage-II (450 CFM @ 65%)
GT28RS (495 CFM @ 60%)

If your primary focus is "big power" the Stage-I SC is not for you.

...........................................................................

 

[ken_climb]

[quote="Mud Nutts

My Stage one Kit will be in my hands this Wednesday. The kit is complete except for the ECU programming. I should have that in a couple of weeks. I guess they are putting the final touches on the EFI system. I am fully confident this kit will rock. I will keep you posted.[/quote]

That's the most important part of the kit on the new Apex.......Hmmmmmmmm.?

 

[chubby]

I think that is the biggest issue with the supercharger kits, or for the turbo kits as well, Fuel control. I think on that issue Mc express has the upper hand.

 

[HAMMER]

MPI's ad states:

"Mac (owner) is an Electrical Engineer with direct EFI experience for GM and National Semiconductor"

I was told it's not a matter of figuring out what the parameters need to be in the mapping, they got that part figured, and tested, it's a supplier issue.

Still, all these parts are pretty much useless with that one piece of the kit missing, honestly, makes me a little nervous even though I have at least 6-weeks till there is enough snow to really ride in.

 

[Srxspec]

From what I know they are missing the plug-in for the fuel controller to plug it directly into the stock wiring harness. Nothing with the actual mapping itself.

 

[Mud Nutts]

I was at a Yami shop today and The dealer was installing a new MCX rear mount turbo on a 06 Mnt Apex and was was shipped incomplete also. Guess what was missing?? Plug in fuel controller. Looks like everyone is in the same boat. I will have my MPI stageI kit installed on my sled by this Thrusday. I am sure the fuel controller will be also in my hands soon also.

 

[Turbo Tim]

I was at a Yami shop today and The dealer was installing a new MCX rear mount turbo on a 06 Mnt Apex and was was shipped incomplete also. Guess what was missing?? Plug in fuel controller. Looks like everyone is in the same boat. I will have my MPI stageI kit installed on my sled by this Thrusday. I am sure the fuel controller will be also in my hands soon also.

Mcexpress kits will be complete on thursday or friday. They offered to ship mine without the controller too , I figured I'd wait for the complete kit.