Same though peer pressure works...
SM105K's Ownership/Performance/Maintenance Thread
- Thread starter SM105K
- Start date
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Zpak
Es Aich Oh!
I may be out on a limb here but I’m pretty sure drag strips operate year round in the desert.
SM105K
Streetlight Grand Prix Champ/ IG @fafomotorsports
They do. I plan on going once the car is 100% sorted out.
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SM105K
Streetlight Grand Prix Champ/ IG @fafomotorsports
I only drove the car a couple of hours before I took it back to Dyno Comp for a tune revision on Friday. However, the mid range really woke up. 845 ft lbs will do that. This is Dyno Comps first time tuning the Spool Pumps. They were only a PTG dealer, and they were willing to work with me. So I knew tune revisions would be on the docket because of a new product. The throttle tip in was pretty sensitive, and the car was long cranking. I guess some Spool pumps have a problem with pressure bleed off. Dyno Comp is in contact with Spool to figure out a solution.
Either way Dyno Comp will make it right. Also I am in the beginning of XC and Enduro season. I have a race every weekend from January 11 through Feb 8th. That is forcing me to drive the tow pig and throw my leg over a bike 5 days a week. So I have limited time to FAFO the Merc, so ironing out all of these issues is perfect timing.
Either way Dyno Comp will make it right. Also I am in the beginning of XC and Enduro season. I have a race every weekend from January 11 through Feb 8th. That is forcing me to drive the tow pig and throw my leg over a bike 5 days a week. So I have limited time to FAFO the Merc, so ironing out all of these issues is perfect timing.
SM105K
Streetlight Grand Prix Champ/ IG @fafomotorsports
Car is back. Dyno Comp was having an issue with fuel pressure bleed down. This was causing long cranking. Spool asked Dyno Comp to do a multitude of tests. I personally didn't realize that the fuel rails had to be removed and drilled ect. Even with great care, it seems that injector 8 got something stuck in it and hung it partially open. Dyno Comp replaced all of the injectors on that bank. The opposite side injectors seemed okay, but they still sent them out and had them professionally cleaned (even though they didn't have too). Dyno Comp has gone above and beyond with the tune, installation, and customer service. I 100% recommend them.
The Spool Pumps have seemed to be doing a great job. Fuel pressure is great across the board. I believe we have found the threshold of stock turbos coupled with 91 fuel at 720 hp and 846 tq to the tire. Not even mad about it.
Here are a couple more dragy pulls as the car sits currently.
Still struggling with the 0 to 60 times. The best I have gotten was 3.17. This one at 3.26 was in race mode, full stiff suspension, traction off, PS4's at recommended MB tire pressures. I did what @kponti said " I would activate racestart and launch the moment racestart flashes on the screen. Do not allow the car to build boost at all!!!" With almost 850 tq and 48 degree pavement this was the best I could get. I am sure that with more seat time, I will get this number down.
New PB from 60 to 130. 7.90 > 8.11. Believe this time is hampered by 91 octane fuel. I do have 5 gallons of 91 in the car right now, and I added 4 gallons of Sunoco 100 octane fuel. I will go out soon and rerun all of these tests to see if the car will pick up with the increase of octane like it seems the 93 octane cars do.
This is a PB for the car. Against the last 10.96 PB. Of course a 10.95 to a 10.96 doesn't seem like much. However the numbers are interesting.
10.96 sixty foot = 1.72 / 10.95 sixty foot = 1.83. This was .11 second slower. Every tenth off the sixty foot is roughly 2 tenths off the quarter. Following that pattern this pass could be a 10.7x if I can get the same sixty foot again.
10.96 330 ft = 4.64s / 10.95 330 ft = 4.72. Again .08 tenths slower.
10.96 1/8th mile = 7.08s @101.10 / 10.95 1/8th mile = 7.13 @ 102.40. Again .05 slower but 1.3 mph faster.
10.96 1/4 mile = 10.96 @127.43 / 10.95 1/4 mile = 10.95 @ 129.29. Faster by .01 seconds but 1.86 mph faster.
The 10.96 run had 794 ft tq which yielded a faster 1/8 mile and 671 hp which yielded a slower big end. The 10.95 had 846 ft tq which yielded a slower 1/8 mile (mechanical grip challenged), but 720 hp which yielded a faster big end.
The Spool Pumps have seemed to be doing a great job. Fuel pressure is great across the board. I believe we have found the threshold of stock turbos coupled with 91 fuel at 720 hp and 846 tq to the tire. Not even mad about it.
Here are a couple more dragy pulls as the car sits currently.
Still struggling with the 0 to 60 times. The best I have gotten was 3.17. This one at 3.26 was in race mode, full stiff suspension, traction off, PS4's at recommended MB tire pressures. I did what @kponti said " I would activate racestart and launch the moment racestart flashes on the screen. Do not allow the car to build boost at all!!!" With almost 850 tq and 48 degree pavement this was the best I could get. I am sure that with more seat time, I will get this number down.
New PB from 60 to 130. 7.90 > 8.11. Believe this time is hampered by 91 octane fuel. I do have 5 gallons of 91 in the car right now, and I added 4 gallons of Sunoco 100 octane fuel. I will go out soon and rerun all of these tests to see if the car will pick up with the increase of octane like it seems the 93 octane cars do.
This is a PB for the car. Against the last 10.96 PB. Of course a 10.95 to a 10.96 doesn't seem like much. However the numbers are interesting.
10.96 sixty foot = 1.72 / 10.95 sixty foot = 1.83. This was .11 second slower. Every tenth off the sixty foot is roughly 2 tenths off the quarter. Following that pattern this pass could be a 10.7x if I can get the same sixty foot again.
10.96 330 ft = 4.64s / 10.95 330 ft = 4.72. Again .08 tenths slower.
10.96 1/8th mile = 7.08s @101.10 / 10.95 1/8th mile = 7.13 @ 102.40. Again .05 slower but 1.3 mph faster.
10.96 1/4 mile = 10.96 @127.43 / 10.95 1/4 mile = 10.95 @ 129.29. Faster by .01 seconds but 1.86 mph faster.
The 10.96 run had 794 ft tq which yielded a faster 1/8 mile and 671 hp which yielded a slower big end. The 10.95 had 846 ft tq which yielded a slower 1/8 mile (mechanical grip challenged), but 720 hp which yielded a faster big end.
amazing.... however bigger turbos.
SM105K
Streetlight Grand Prix Champ/ IG @fafomotorsports
Nope. It will get more octane first. Guys on 93 octane with the same mods are going similar 0 to 60 times, 7.20-7.40 second 60 to 130 runs, and running 10.60 to 10.70 quarter mile times @ 129-131 mph.
Then it will get a drag radial when I need new rear tires.
Then it will get a drag radial when I need new rear tires.
forget you folks on west coast get crapola 91
Zpak
Es Aich Oh!
Yeah that’s super lame. I have a few stations by me that get 110 with zero E in the summer.
I found a sunoco buy its like 20 miles away has racing fuel gt 260. However with 93 I would prefer ethanol mix at this point with the hpfp. That gt 260 would help you folks for sure.
SM105K
Streetlight Grand Prix Champ/ IG @fafomotorsports
Went back out with a bit more octane. I chipped it down again.
Bit by bit. Wheel spin wasn't as bad with a bit better throttle modulation.
I figured that it would pick up with more octane. Guess not.
Sixty foot was a little better, which lead to a better quarter mile since performance was roughly the same. Just goes to prove how important the sixty foot for ET.
Bit by bit. Wheel spin wasn't as bad with a bit better throttle modulation.
I figured that it would pick up with more octane. Guess not.
Sixty foot was a little better, which lead to a better quarter mile since performance was roughly the same. Just goes to prove how important the sixty foot for ET.
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