When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I figured I'd post here to get some feed back on my times and see what the "internet professionals" think about my times and experience.
This was the first time at the track with my 2005 E55 and my best time was a 12.428 at 112.65 mph. On Wednesday nights it's bracket style racing and I took home first place out of about 300 cars!!!
It was about 85 - 90 degrees out and the density altitude at sac raceway was 1668.74 ft.
The vehicle is on 19" federal street tires. It has a 77mm pulley, belt wrap kit, Carbonio carbon air box with tubes, split cooling system with BMW style res., PLM heat exchanger, Bosch 010 pump, Euro-charged ECU and TCU tune and 1 step colder NGK plugs.
Based off times I've seen online I feel this is slow. I was really hoping for high 11's. Is that un-realistic with my set up? I know I have a variety of factors working against me here (first time at the track in the E55, ****ty street tires, heat soak and restrictive exhaust)
What do you guys think? Should I have been faster? I think with an under the hood ice tank, cooler outside temps, more practice, better tires and long tube headers I should get into the 11's....
All constructive criticism is highly appreciated. Thanks and enjoy.
Winners Circle
Winning slip and fastest time. I ran 12.5 multiple times last night and my mph were 114.63. Thought it was weird I only trapped 112 on my fastest run.
My girlfriend and her friend. Little eye candy for you all.
You really need some headers, youve upped the air going in but left the huge bottle neck (eben for stock power) going out. Longtubes or mids should make a big improvement.
You really need some headers, youve upped the air going in but left the huge bottle neck (eben for stock power) going out. Longtubes or mids should make a big improvement.
I completely agree. Dam you California emissions!!!!
I have 77mm pulley, BWK, heat exchanger and bosh pump with an Anthony Lawshee tune. Ran 11.74 @ 119 on 19” rims my only time at the track.
Wow. That's impressive. I must be a horrible driver then. It's hard to believe just a different tune is cutting almost a full second off the quarter mile.
Your 60' times are good for street tires. I would start looking into finding an issue. Are you logging/monitoring boost, iat, afr?
That's what I thought.... I don't think I have any issues mechanically. The car pulls like a freight train and even breaks traction on the hwy at about 50 mph (when it's ice cold out that is)
You are correct though, I really need to be monitoring AFR's, IAT's, etc.
In fact, I just ordered a mass air flow sensor and data logger from VRP!!!
Yeah I was really surprised I ran that fast. It was my third pass, hot lapping it with no split cooling. I don’t know how to attach the pic of the time slip.
Sac is all about traction. Get yourself a set of clk wheels and a set of Hoosiers and you’ll knock off 3-4;tenths. Don’t underestimate what heat does to your performance. When I use to race at Sac I only did runs late September through mid April. I’m here to help if you need it.
Sac is all about traction. Get yourself a set of clk wheels and a set of Hoosiers and you’ll knock off 3-4;tenths. Don’t underestimate what heat does to your performance. When I use to race at Sac I only did runs late September through mid April. I’m here to help if you need it.
Thank you. After more consideration I think it was the heat and bottle necked exhaust that was preventing me from getting into the 11's. My first step will be to install this data logger and wide band o2 so I can monitor AFR's and IAT's.
Then i will buy an under the hood ice tank (I don't like the idea of running a second pump or lines all the way to the trunk) and headers. Hopefully I will have this done buy late September so I can test again with cooler outside temps.
Not too bad. I would say your IAT's are probably high. 1.9 60' is not bad on street tires but the MPH is down from what i would expect. DA wasnt helping you so in conclusion id say you ran pretty close to what i would expect maybe a couple tenths higher. Get a good logger and start seeing what the IAT's do.
Not too bad. I would say your IAT's are probably high. 1.9 60' is not bad on street tires but the MPH is down from what i would expect. DA wasnt helping you so in conclusion id say you ran pretty close to what i would expect maybe a couple tenths higher. Get a good logger and start seeing what the IAT's do.
Thanks for all the feedback fellas!! I'm 90% sure it was the temp outside and ultimately my IAT's that killed me out there. That also explains why my fastest run was my last run.... Finally started to cool down outside.
My plan is to install this data logger to get an idea on IAT's, buy and install and under the hood ice tank and re test mid to late September when it starts to cool down outside.
From what I've researched, with my mods, I should have been in the high 11's with around 117 trap speed....
How are you guys tracking these things? Comfort mode or Sport mode? Burn out or no burn out? What suspension setting? Etc.
Thanks for all the feedback fellas!! I'm 90% sure it was the temp outside and ultimately my IAT's that killed me out there. That also explains why my fastest run was my last run.... Finally started to cool down outside.
My plan is to install this data logger to get an idea on IAT's, buy and install and under the hood ice tank and re test mid to late September when it starts to cool down outside.
From what I've researched, with my mods, I should have been in the high 11's with around 117 trap speed....
How are you guys tracking these things? Comfort mode or Sport mode? Burn out or no burn out? What suspension setting? Etc.
Sport mode, raised suspension, take the slack out of the power train and launch off idle. I went 11.701 stock on drag radials at Sac. The difference between my 57lb 19” low profile tires and my old 48lb 17”drag radials for me was worth 3 tenths.
Last edited by Hammer Down; Jul 6, 2018 at 01:30 PM.
Sport mode, raised suspension, take the slack out of the valve train and launch off idle. I went 11.701 stock on drag radials at Sac. The difference between my 57lb 19” low profile tires and my old 48lb 17”drag radials for me was worth 3 tenths.
Wow. 3 tenths is impressive. What is the reasoning for raising the suspension? Better weight transfer to rear tires maybe...? Also, what do you mean by taking the slack out of the valve train? Did you mean power train? Finally, are you leaving traction control on or off?
Yes he means the drivetrain. Ive always struggled to brake load the car and launch but some people prefer 1200-2000 revs with brake then go.. Traction control off of course, tc cuts fuel and applies brakes its not good for speed but good if your new to the car. Some people start in manual mode and flick it to sport before 1st gear shift occurs. In sport mode the clutch engages and can cause the engine to gain power before it transfers it to rhe wheels resulting in loss of traction on high hp m113ks in my exp. Raised is so weight goes back like you said.
Wow. 3 tenths is impressive. What is the reasoning for raising the suspension? Better weight transfer to rear tires maybe...? Also, what do you mean by taking the slack out of the valve train? Did you mean power train? Finally, are you leaving traction control on or off?
oops yes, power train, if you hook it doesn’t matter esc on or off. I’ve always launched with it on.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
