GTM Performance Engineering Stage 1 Turn key Supercharger kit In house Installation.

fstrnldr · 06-11-2010, 11:18 PM

Quote:

Originally Posted by Jordo!

Meaning no one can even tune the maps or they can edit the values but have no idea what they are doing...?

If the former, that's going to make FI a PITA to tune...

The cams aren't even controlled by the same ECU as the engine. VVEL has its very own "ECU" that gets a single can bus data line from the engine ECU, then makes the adjustments to the cam duration and lift based on that data. It makes things a bit more complicated that just some editing on the tuning program everyone is using.

Now for the real questions ... how many anniversaries does Shumby have ahead of him before his wife will finally let this go?

good luck on both accounts

shumby · 06-12-2010, 12:24 AM

^^^ lol

thanks for adding that info. Good to hear it from someone in the know.

Jordo! · 06-12-2010, 01:49 AM

Quote:

Originally Posted by fstrnldr

The cams aren't even controlled by the same ECU as the engine. VVEL has its very own "ECU" that gets a single can bus data line from the engine ECU, then makes the adjustments to the cam duration and lift based on that data. It makes things a bit more complicated that just some editing on the tuning program everyone is using.

Now for the real questions ... how many anniversaries does Shumby have ahead of him before his wife will finally let this go?

good luck on both accounts

Really??? Huh... I had no idea. Still learning...

MMC Racing · 06-12-2010, 10:43 AM

The GTM kit is untunable?

Q8y_drifter · 06-12-2010, 11:16 AM

Quote:

Originally Posted by MMC Racing

The GTM kit is untunable?

where did you come up with that idea?

NYBladeZ · 06-12-2010, 11:27 AM

Man this really sucks, sure you'll still make a lot of power with stock cats and headers but everything comes down to the tune. If the tuning is limited it will have a snowball effect. I applaud you guys for being the pioneer and still making good #'s, if anything its a prequel on what the Z is really capable of. However I'm going to hold off on any intake mods other than drop in filters or power adders until VVEL is cracked. Unfortunately many tuners/manufacturers are pre occupied with making $ through basic bolt ons and INITIAL F.I. kits, looks like the one who remains patient may have a lot to gain.

theDreamer · 06-12-2010, 11:28 AM

Quote:

Originally Posted by MMC Racing

The GTM kit is untunable?

Are you just writing random thoughts that come to your brain or are you logically thinking at all?

theDreamer · 06-12-2010, 11:30 AM

This is what I got from Uprev yesterday when I brought up VVEL again.

Quote:

From what we see on the earlier motors the cam phasing alone is just about perfect from the factory. You can adjust them all day and you gain 1-2hp. With the VVEL we have no less of an expectation. So realistically no one is moving forward on the development of the software because the potential gains will be very small, and the liability is huge. Also there are exactly ZERO hardware pieces in development in the aftermarket. So no replacement pieces or items that would require a change in the tuning itself.

Q8y_drifter · 06-12-2010, 11:51 AM

Their reply makes sense. I mean the VVEL allows for perfect and continuously variable cam timing all throughout the powerband so "cracking" it would be useless. If the LTH's are not allowing backpressure to be produced then I wouldn't really blame F.I or GTM for this issue. I'm willing to bet Stillen will run into the same issue if they attempt to tune their kit with LTH's and CBE pre-installed.

Maybe some catted LTH's would allow for some backpressure build up and thus retain pressure in the chamber? I guess someone will need to test this out and see if any gains are made versus stock headers and test pipes combo.

Valentino · 06-12-2010, 12:31 PM

Great info theDreamer +1 rep.

So now we need to knock on some cam manufactures door.

Shumby your in good hands. I'm sure you'll have a big smile on your trip back home.

Edit: Don't for get the DIAMOND ring

Zat_Zuma · 06-12-2010, 12:37 PM

If the GTM SC kit is having problems with a LTH with no cats and not building boost ......... is there going to be a problem with running stock headers and aftermarket HFC's and a larger diameter CBE? I do believe that Stillen and GTM have tested their SC kits on stock cats and a larger CBE and have shown good results. But I don't believe they have completed any tests with aftermarket HFC's.

This is going to be a interesting read on what the outcome is going to be for both GTM's and Stillen's SC kits. I hope that the final outcome isn't that we all have to have stock HFC's and stock headers to have a SC kit ..... that wouldn't be nice and in my mind it would prevent some serious gains with a free flowing exhaust and HFC's. Plus, with the extra fuel/air from the SC boosted intake flow, the stock cats would eventually burn out or worse; plug off from the extra exhaust gases. I basically don't have much faith or generally like the performance of a stock catalytic converter in a stock or forced induction situation.

GTM and Stillen have some serious testing to do answer those questions and I'm awaiting to see the results.

MMC Racing · 06-12-2010, 12:40 PM

Quote:

Originally Posted by theDreamer

Are you just writing random thoughts that come to your brain or are you logically thinking at all?

This forum is so on edge over these supercharger kits, it was meant to raise some blood pressures...

I know it isn't true.

Zsteve · 06-12-2010, 12:55 PM

Ill take an extra 150 whp on stock headers and cats all day long with a SC.

shumby · 06-12-2010, 12:59 PM

me too at this point. however i do not think HFC will be an issues but RCZ will be the test pig on that one

shumby · 06-12-2010, 02:05 PM

ah much happier today. woot

06-12-2010, 12:24 AM	#167 (permalink)
shumby Captin Canuck Join Date: Dec 2008 Location: with your mom Age: 44 Posts: 6,288 Drives: your sister Rep Power: 236	^^^ lol thanks for adding that info. Good to hear it from someone in the know. __________________ Originally Posted by SAM@GTM Engine detonation is not normal and it should never never happen, and whoever told that need to do something else for living . Sam

06-12-2010, 11:27 AM	#171 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 20	Man this really sucks, sure you'll still make a lot of power with stock cats and headers but everything comes down to the tune. If the tuning is limited it will have a snowball effect. I applaud you guys for being the pioneer and still making good #'s, if anything its a prequel on what the Z is really capable of. However I'm going to hold off on any intake mods other than drop in filters or power adders until VVEL is cracked. Unfortunately many tuners/manufacturers are pre occupied with making $ through basic bolt ons and INITIAL F.I. kits, looks like the one who remains patient may have a lot to gain. __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

06-12-2010, 12:31 PM	#175 (permalink)
Valentino Enthusiast Member Join Date: Jan 2009 Location: RaceTrack Posts: 349 Drives: SOLD 09,370z,M6 Rep Power: 305	Great info theDreamer +1 rep. So now we need to knock on some cam manufactures door. Shumby your in good hands. I'm sure you'll have a big smile on your trip back home. Edit: Don't for get the DIAMOND ring __________________ Lou Fusz Nissan \| KW V3 \| SPL rear camber and toe bolt \| OS Giken LSD \| Nismo Diff cover \| Engine Oil cooler \| F.I. TDX Cat Back 18" Resonators \| F.I. Resonated Test Pipes \| Injen cold air intake \| COBB AccessPORT \| JWT Clutch Flywheel \| Last edited by Valentino; 06-12-2010 at 12:34 PM.

06-12-2010, 12:37 PM	#176 (permalink)
Zat_Zuma A True Z Fanatic Join Date: Nov 2008 Location: Edmonton, Alberta ...eh Posts: 1,171 Drives: 2017 Touring auto Rep Power: 19	If the GTM SC kit is having problems with a LTH with no cats and not building boost ......... is there going to be a problem with running stock headers and aftermarket HFC's and a larger diameter CBE? I do believe that Stillen and GTM have tested their SC kits on stock cats and a larger CBE and have shown good results. But I don't believe they have completed any tests with aftermarket HFC's. This is going to be a interesting read on what the outcome is going to be for both GTM's and Stillen's SC kits. I hope that the final outcome isn't that we all have to have stock HFC's and stock headers to have a SC kit ..... that wouldn't be nice and in my mind it would prevent some serious gains with a free flowing exhaust and HFC's. Plus, with the extra fuel/air from the SC boosted intake flow, the stock cats would eventually burn out or worse; plug off from the extra exhaust gases. I basically don't have much faith or generally like the performance of a stock catalytic converter in a stock or forced induction situation. GTM and Stillen have some serious testing to do answer those questions and I'm awaiting to see the results. __________________ [B]2009 & 2017 370Z Touring Sport Autos SOLD

06-12-2010, 12:55 PM	#178 (permalink)
Zsteve A True Z Fanatic Join Date: Sep 2009 Location: TX Posts: 3,298 Drives: the 2 balled club Rep Power: 22	Ill take an extra 150 whp on stock headers and cats all day long with a SC. __________________ 2010 LS3 C6 Silver coupe corvette

06-12-2010, 10:43 AM	#169 (permalink)
MMC Racing Track Member Join Date: Jun 2009 Location: San Diego Posts: 661 Drives: 2015 GT-R Rep Power: 17	The GTM kit is untunable?

06-12-2010, 11:51 AM	#174 (permalink)
Q8y_drifter Enthusiast Member Join Date: Mar 2010 Location: Kuwait Posts: 306 Drives: 08 Infiniti G35 5AT Rep Power: 15	Their reply makes sense. I mean the VVEL allows for perfect and continuously variable cam timing all throughout the powerband so "cracking" it would be useless. If the LTH's are not allowing backpressure to be produced then I wouldn't really blame F.I or GTM for this issue. I'm willing to bet Stillen will run into the same issue if they attempt to tune their kit with LTH's and CBE pre-installed. Maybe some catted LTH's would allow for some backpressure build up and thus retain pressure in the chamber? I guess someone will need to test this out and see if any gains are made versus stock headers and test pipes combo.

06-12-2010, 12:59 PM	#179 (permalink)
shumby Captin Canuck Join Date: Dec 2008 Location: with your mom Age: 44 Posts: 6,288 Drives: your sister Rep Power: 236	me too at this point. however i do not think HFC will be an issues but RCZ will be the test pig on that one __________________ Originally Posted by SAM@GTM Engine detonation is not normal and it should never never happen, and whoever told that need to do something else for living . Sam

06-12-2010, 02:05 PM	#180 (permalink)
shumby Captin Canuck Join Date: Dec 2008 Location: with your mom Age: 44 Posts: 6,288 Drives: your sister Rep Power: 236	ah much happier today. woot __________________ Originally Posted by SAM@GTM Engine detonation is not normal and it should never never happen, and whoever told that need to do something else for living . Sam

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