OVS RG TM8 at 1000ft elevation

[Sparx]

Just had my sled out last night for my first low elevation ride running straight race 108 motor octane, 114 RON @ 10lbs boost. Sled ran great with very little tuning. Honestly for the area and conditions it was way too much sled. Ran pretty crisp overall. I'm sure I could push 12lbs at this elevation no problem.

What a difference though! Can feel the difference more on the altitude on this sled than my '07 M1000 by far... This is on a 2010 M8 with '09 head, Tial OVS setup. Didn't do much to the clutching but it was obviously revving pretty high around 8600rpm, but power wasn't much of an issue to need it dialed in.

Next, turn the boost down and try to run 5lbs boost on AV gas and work my way up till the DET kicks in. Definitetly need to upgrade to the quiet exhaust though, the noise off the tight trees makes you feel like you'll be death by the end of the ride!

 

[Mod800R]

hey fellow canuck,

am running a racegas setup at low elevation too...but a twisted kit on a 09...9 psi on 112, and 6 psi with Avfuel...

was debating back and forth between a RGT M8 or a full bolt on M 1000...i wasnt going to be running this sled every weekend, and i have a dedicated trail sled...so i opted for the turbo...but would love to see a n/a 1000 with 200 plus hp run compared to it...

 

[ondast]

Im running a cpc RG kit on my 09, and im at 15+psi boost on 1000feet, with 50/50 110 MON and premium pumpgas, no problem at all!

 

[TheBreeze]

What did you change in your setup to allow 15+ psi at low altitude running 50/50?

 

[m8lovin]

Ondast. What is the octane of your premium pump over there?

 

[ondast]

What did you change in your setup to allow 15+ psi at low altitude running 50/50?

Nothing more then lower the compression with a new head, and turn the boost up,

Our "premium" pumpgas is 98 RON, should be equal to your gas..?

 

[JasonAK]

What did you lower the CR to?

 

[ondast]

10.5-1

 

[JasonAK]

So what is the stock 2007-2009 M8 head? Anyone know?

 

[ondast]

I think it´s close to 12.0-1, but im not 100% sure on that..

 

[Sparx]

hey fellow canuck,

am running a racegas setup at low elevation too...but a twisted kit on a 09...9 psi on 112, and 6 psi with Avfuel...

was debating back and forth between a RGT M8 or a full bolt on M 1000...i wasnt going to be running this sled every weekend, and i have a dedicated trail sled...so i opted for the turbo...but would love to see a n/a 1000 with 200 plus hp run compared to it...

Good posts guys! Great to hear all the success of low elevation turbo riding. Gonna have to do the AV gas route for sure though, them $140 tanks are too expensive for my liking until I do propane next year!

I wouldn't waste your time comparing a Turbo sled to a N/A M1000 with everything you could do to it. I have a '07 M1000 with the SLP kit that claims 193HP & I wouldn't ever line it up with my sled. Don't think putting twin pipes on it and porting would change that decision either.... Bigbore 1200 would help, but you would never get the mileage I get on my Turbo 800 out of my M1000 even the way it's setup right now...

 

[JasonAK]

Just had my sled out last night for my first low elevation ride running straight race 108 motor octane, 114 RON @ 10lbs boost. Sled ran great with very little tuning. Honestly for the area and conditions it was way too much sled. Ran pretty crisp overall. I'm sure I could push 12lbs at this elevation no problem.

What a difference though! Can feel the difference more on the altitude on this sled than my '07 M1000 by far... This is on a 2010 M8 with '09 head, Tial OVS setup. Didn't do much to the clutching but it was obviously revving pretty high around 8600rpm, but power wasn't much of an issue to need it dialed in.

Next, turn the boost down and try to run 5lbs boost on AV gas and work my way up till the DET kicks in. Definitetly need to upgrade to the quiet exhaust though, the noise off the tight trees makes you feel like you'll be death by the end of the ride!

Have you been able to run 5-6 psi with 100ll yet?

 

[Sparx]

Nope not yet sorry, probably in the coming week... Work Sucks!

So far I've found the limits of 100LL at elevation as my wastegate was acting up and spiked to 15lbs boost and set off my DET sensor so I know I can't go to 15lbs at 7250ft or lower, but may be abled to get away with 12lbs quite likely since 10lbs it works great no problems. I had issues with not getting fuel at WOT due to possible frozen/damaged boost line to the fuel controller but I doubt that would change much for DET issues at 15lbs boost.

In the end it seems pointless to change the weights much on the primary running 10lbs at 6-7000ft, 75g of weight with 3 magnets in each middle hole seem to be the ticket for best throttle response. Haven't liked any other setup better than that so far. Quite possibly looking for an alternate setup on the secondary clutch however that will work better than the torsional setup in reverse.... More to come.

 

[Sparx]

Nothing more then lower the compression with a new head, and turn the boost up,

Our "premium" pumpgas is 98 RON, should be equal to your gas..?

Just to elaborate, I have been using 100LL with is a MON I believe, as well as Tracktek 114 & 111 RON race fuel with a MON of 108 & 106 respectively, 98 RON would probably be better than the best premium we can get in Canada let alone US at the pumps from what I seen.

Would be nice if we could start a sticky in the turbo section with success' at different altitudes with which levels of RON & MON fuels before hitting DET.... Anyone????

I'm real positive 5-6lbs won't be an issue at all locally for me at 1000ft elevation with 100LL if I can turn my wastegate down that much which I'm pretty sure I can from initial tuning at 6-7000ft starting out at 6lbs...

I love this trial and error stuff with the DET & A/F gauge, couldn't see anyother way around it. My plugs are corresponding right to what I'm seeing on the gauge so I know I'm safe. No lead buildup on the plugs yet, everything looks great with 300 miles and about a drum of AV gas burnt so far, love the stuff