GTM Stage 1.5 Supercharger instruction manual
 

I'd like to view the GTM stage 1.5 supercharger installation manual but can not find a pdf online.
I have a stage 1 SC and would like to look at the component differences to look into upgrading my unit.
Thanks

I used the Stage 2 manual for my install. It is accurate on all but 1 or 2 minor steps. Gives you a better idea of the install because the intake/piping setup is the same as the stage 2. The only difference is that they used the smaller stage 1 compressor for the 1.5 kit.

https://www.dropbox.com/s/vy2u8u1dvv...tions.pdf?dl=0

Sounds like you already found it, but there it is just in case.

Thanks for sending me the info. I look forward to checking it out!!

No problem. Let me know if you have any questions. I did the install myself so I can probably help out.

Looks like the difference on the stage 1 to the stage 1.5 is the intake piping and the use of a motor mount.
I thought that I read that the Rotrex unit is the same for stage 1 and 1.5 .
Not sure where the difference in horse power comes from?
The intercooler piping and intercooler appears to be the same.
I don't know if there is a difference in the fuel pump or the injectors.?

my understanding is that the difference in HP actually came from using the stage 2 intake piping. The original design was too restrictive for the stage 1 SC to achieve maximum HP. someone more knowledgeable might correct me, but that was how i understood it when i was researching.

they also added the fuel pump voltage stabilizer kit (basically runs thicker wires directly to the fuel pump). this may have helped them tune for a bit more HP as well.

Naturally the stage 2 instructions do not show how the stage 2 intake piping is installed. Maybe I can find pics of the intake installation on a stage 1.5 or 2 build on this forum.
I also noticed the wiring difference to the fuel pump.
I did my build also and I was curious as to the differences between 1 and 1.5.
Seems fairly simple to upgrade if the intake and motor mount were found.

I am pretty sure this is what the stage 1 intake looks like with two smaller cones, and seems smaller diameter piping (edit: looking closer the piping diameter looks the same). Sounds like you currently have one so you can confirm if I am right. Looks like this
https://lh6.googleusercontent.com/-W...2017.34.23.jpg

Stage 1.5 and 2 look like this. the intake runs straight the supercharger. (also check out the rest of that album http://i313.photobucket.com/albums/l.../P11700481.jpg)
http://i313.photobucket.com/albums/l.../P11700481.jpg

looking at the photos of the stage 1 reminds me that the stage 1.5 & 2 vents the bypass valve to atmosphere as well. not sure what that does for power.

Stage 1.5 & 2 intake pipe to the Rotrex unit is now a Vband that bolts directly to the Rotrex unit. You basically need to sets of hands, one under the car and one above to guide it in nicely.

The major difference is that one intake piece, where the stage 1 had a piece with an over 90 degree bend which did not allow you to run anymore air into the Rotrex unit. I know this because I had the smallest pulley possible on my car and barely made over 8PSI, it was an airflow restriction. The piece of pipe in the lower left corner of this photo is the intake piece which takes the 2 intake filters into 1 and then bends around and into the Rotrex unit. Where with the Stage 1.5/2 you have a "straight" piece of pipe.

http://i120.photobucket.com/albums/o...0/fde44a69.jpg

Antivenom, yes my unit has the two intakes.
I was wondering if theDreamer would chime in, you were very helpful to me while doing the build .
So, if I were to look into trying to find the intake, would I also need a different fuel pump ( other than the wiring thing) or injectors?

Well, I'd like to do this upgrade but where would one find the components?
I checked with Vivid racing about the 1.5 upgrade and they sell it with a new SC... .. Not what i,m trying to accomplish.
I'm wondering why the current intake cant be reworked into a straight-on intake ( maybe matt would sell me his :) ) , which would eliminate the need for a new SC housing. I would also rework the MAF piping to go from 2.5" ~ 3". Seems like those mods are do able. I would need the motor mount and the Voltage thing for the fuel pump. I have 600cc injectors , wondering if I'd need to go to 650's. I assume the stage 1 fuel pump is the same as the stage 2's??

Kraftwerksusa.com carries the bigger c38-91
rotrex SC units on there site,plus rotrex fluid and optional pulley sizes,not sure if that helps at all,t hey also do custom piping I believe.

Anyone handy with welding intake pipes should be able to get you what you need in terms of the pipes. I can take photos of my intake piping next to a ruler. easy since they are currently out. I will also keep you in mind as i reinstall over the next couple of weeks and take pictures of the install as well.

I have considered bumping to the stage 2 supercharger (found it on Kraftwerks), but the GTM has a custom outlet port that redirects it forward. I haven't measured but I doubt the housing from the smaller unit will work.

Does Vivid carry actual GTM/Gamma made upgrades?

I emailed both gamma and vivid. They have a 1.5 upgrade that includes the piping and a bigger compressor. $3500.00. I'm just looking to do the piping upgrade. If I can use my intake pipe (or aquire another one preferably), I think it could be cut and retrofitted to make it a straight pipe. Similar to the stage 2 intake . The motor mount is the item that I would need to aquire. I'd rather aquire the whole set up if I can find it minus the compressor. Sounds like a shot in the dark there.

AntiVenom,
If you could send pics, that would be appreciated!
Do you have stage 1.5 or 2?
What size injectors are you using?
Can you get a pic of the relay so maybe I can source that also?
Thank you ,
Kent

Not sure if this helpful .. but I have the stage 2 kit with 650cc injectors smaller pulley (85mm) from kraftwerks ... I didn't bother with the stabilizer I upgraded to return fuel system ...... I thought the piping was the same except the inlet pipe...and the motor mount will be hard to find other than a used kit or gamma ....you would prolly be better with the smaller unit converted to the 1.5 than buying the larger unit I max my stage 2 unit out at 12.5lbs and I think you can get 11lbs with the smaller unit ...if I remember correctly

Kentmo, I can take some pics this weekend next to a ruler, vernier caliper, etc

I have the 1.5 and it runs the 650cc injectors, just like the stage 2

Kentmo did you ever price the cost of just the upgraded GTM SC unit from them?

I've wanted to upgrade to a larger unit. I know the generic Rotrex unit runs about 2-2.5k.

Well. I have been emailing with Amin @ Gamma.
The stage 1.5 includes the piping and a c3 92 unit. $3500.00
He said he could sell the kit minus the s.c. for $2000.00. But that may not hook up to my sc unit without a new s.c. housing to accommodate the intake pipe. .. 2k is too much. If it were 13 or 14 hundred I would pull the trigger if the housing came with the kit. Finding the motor mount is the biggest issue. Maybe they will sell just that. I can fabricate piping.

I guess you would be getting
Intake pipes
turbo smart Bypass valve
Injectors
Fuel Stabilizer Kit
motor mount

the injectors alone are going to be $500-600, IIRC, and the bypass valve $270 or so. no idea what they'd want for the motor mount.

do you happen to know if $3500 is the same price to go to stage 2?

Well,
I bit the bullet and purchased the Gamma Stage 1 to 1.5 upgrade kit.
Included is the inlet housing & piping, inlet filter, 3" maf piping, Motor mount , 92mm pulley.
I'll have my pulley for sale. It reads 84 so I assume it's an 84mm pulley.
I'll measure that to double check.
Belt and sc traction oil.
Will update when it all happens.

Nice! Good luck. Should be straight forward.

Hopefully I can swap the SC housing out without a major tear down involved...
Waiting for Gamma to send me the installation instructions.

It's doable but the motor has to be lifted for removing the stage 1 intake.
Otherwise remove the Rotrex S/C and swap out the intakes. Third option in removing the Stage 1 air intake involves cutting it in half to provide clearance to remove it from the S/C.

A lift will make things easier to work on.

Keep the 84 mm pulley, as you may want to use it later for more boost.

I know I have to pull the exhaust manifold and motor mount, maybe that will give me some room to pull the housing ???..
I'm always up for an adventure...

Nope, the front motor cradle frame is in the way. Been there and done that.

lol... naturally

I always wished i would have bit the bullet and did the 1.5 upgrade years ago before the GTM fiasco. If I remember correctly it was a lot cheaper back then too.

Curious to see how the install goes.

i bought the stage 3 upgrade for my stage 2 kit.
2600.00
and i got nothing

z

Yeah, GTM time it was about $1,800 I think originally, wish I bought it back then also.

I'll keep everyone posted as to when it ships etc. I'm just waiting on the motor mount before it ships...
Amin and Omar from Gamma have been in communication , so I "expect" a normal transaction. Fingers crossed

thread from the dead, but did you ever receive your parts, or the install manual for the 1.5 upgrade?

Sorry to dig this up again but the dropbox file doesn't work anymore, does anyone happen to have a pdf of the installation manual for gtm sc kits?

I don’t have it in PDF form but I still have it printed out on paper in a binder if there’s something specific you need me to look up/take a pic of etc, my kits the stage 2 and is coming off my car soon and going for sale as well.

Ssfirehawk is selling his kit.

I do not remember which version I have but here is a copy: https://www.dropbox.com/s/i662tk3jkp...tions.pdf?dl=0

Thanks y'all I appreciate the help! Fyi dreamer those are the instructions for the stage 1 kit, it works for what I needed though since the only difference is the intake. I'm just trying to get that power steering fitting to stop leaking lol