JoshM813

Just got back from practicing my launches at a 1/8th track and I feel like my car should be faster but idk...my mods are just H/E and pump

DA was 1249

74° and 91% humidity

Best time:
1.938 60ft
8.251 1/8th
86.88 mph

Is it just the humidity or should I check somethings?

RedBullJnky

You running street tires or DR's?

Bramage

8.2 for stock at a (probably) under prepped track seems very good.

When I was stock, I ran 8.5 - 9.0... If this is street tires, you are doing just fine!!

If you look at stock E55's on dragtimes, you will see times from 8.0 to 8.5. Tires and prep play a very big role. Your 60' times (if street tires) is good.. so start modding!!!

JoshM813

Yea street tires on 20"radenergie's and first time out...i think the humidity is affecting that trap though as ive raced cars that trap higher and have beat them.

I think the part that bothers me is that my 335i did 7.9@91mph on only 93 and bald tires.

AKnight55

Humidity is killing you.. Not bad at all considering the prep was probably ****

JoshM813

Yea there was hardly any sticky ****...i can usually hear it when driving over it.

But I was just practicing 60fts for this huge euro meet at the quarter mile track saturday in Bradenton FL...usually do a tournament.

lowprofile

I agree, you are doing well when looking at the big picture. Good luck at the meet next Saturday.

E55Bullet

Mine does 7.3 but is well modded for comparison with DRs

JoshM813

What do you consider well modded

E55Bullet

Pulley tune header couple ods and ends

JoshM813

Ok I just ordered a pulley not too long ago and that and the tune should be done next month sometime.

Another question...does weather conditions affect the E55 a lot? Because why do some stock E55s trap 117 stock and others 112?

E55Bullet

It completely effects it. Almost night and day. The DA and temp of the air/car are the most important things.

Vic55

20 inch Radenergies?? Those things are tanks. Thats part of your issue for sure.

JoshM813

Granted I know they are larger than stock but aren't they still lighter?

Vic55

ehhhhhhh probably not--- depends on the model you have. Even their forged versions are almost if not 30lbs and the increased rolling diameter/inertia has to play a role. Couple that with 20 inch low profile tires and you have a slower(feeling) car.

JoshM813

Thats what I was thinking...just from inertia...rotating weight is a ***** lol

regor60

Friction keeps the tire from slipping and also propels vehicle. While torque hasn't changed required friction force to prevent slip drops by the ratio of before and after diameter. Assuming 20" wheels versus 18" thus could mean a 10% reduction in force/ torque

ME63AMG07

Smaller dia wheels usually weigh less and do decrease the time it takes to accelerate to a given speed. Each 1in increase of diam (assum wieght is same) will rob you of a tenth of second or two in acceleration time. Top speed will rise though by. A couple of mph per inch dia increase . My E63 w18s got me to 156mph according to speedo. W 19s I now get to see 158mph on speedo. But I prob lose 0.1 second or so 0-60. I don't care tho as my new CLS63 PP rims look sOOoo much better IMO. Also the weight diff between my old rims and new forged rims will actuaLly negate the nomal tenth of a second or so loss that I would normally expect to have to live with during acceleration.For me it was a win-win then.

hbr

1/8 miles times are hard to find. Stock '05 on a cool night in SC, 62* and 71% humidity 19" HREs with street tires at 35#

4 in the lows 8s then let her set and did the sneaky ECU reset for my best of:

1.824
7.987
87.008

I want to go again when it's cold

Jakpro1

Honestly, more than ANY car I have ever owned. Mostly a heat and DA issue.

JoshM813

Thats pretty good...i got the new red tooth pulley installed just waiting to get tuned.

JoshM813

I completely agree...this car hates heat and humidity with a burning passion