Dynodaddy

I made it out to the 1/4 mile track last night and managed to pull in two runs. The first run went well up until 850' or so when the car goverened itself at 120mph for some odd reason. I figure the car would have ran a 10.50 @ 133-135 if I hadn't hit the governor. I will work on getting this resolved with Eurocharged this week.

This run was with 14psi and a soft 60'. Once I get the governor issue fixed I will be back out to shave off some more time. Maybe the third time at the 1/4 mile track will be the charm....

http://www.youtube.com/user/DynodaddyJr?feature=watch

shardul

iTrader: (1)

Great!

chawkins2001

Good gracious, that is moving. What are your mods?

Welwynnick

Nice driving. And you did that with only 14 psi boost? Do you know what your outputs are at that level?

BTW, what did you do to the S600 in your sig to get it to do 11.7?

Cheers, Nick

Dynodaddy

I can't remember what power it made at 14psi exactly. I know it made 865 or something at 22psi and 100 octane on a really hot run and easily pinned the dyno on torque.

The S600 has billet compressor wheels, chip, bigger intercoolers and exhaust. I am thinking about putting the big tires on that car this winter and dropping that 11.7 down a few more tenths. The car runs 12.2's with 18" street tires.

chawkins2001

Niceee! The CL only has 100 octane, and tune @ 22lbs?

RaceHorse

No, he has a totally custom turbo intercooler set up less ABC. check out older posts....

So you beefed up the tranny what about the rear anything done there? or just monster side wall tires absorbing some of the torque for now? Also what RPM do you launch? Keep up the good work and good luck!!!

Dynodaddy

Nothing done to the rear end. I launch at the highest possibe RPM that I can, these tires take everything I can give them.

I just recieved a new tune from eurocharged that will hopefully fix the speed limiter issue. Taking the car to the 1/8 mile Friday as long as it doesn't rain. I am going to turn the power up a little and see if I can get the car down to 6.4-6.5 @ 110+ range.

The 60's still seem high to me so I am going to add some additional bracking to the back frame rail and see if I can make it transfer weight abit better. Even though the car lifts the front tire I really think I should be cutting 1.4X.

chawkins2001

What tires are you running brotha?

Dynodaddy

Mickey Thompson 28 X 10.5's. The cage is the reason the tires are hooking up so well (and consistantly). W/O the cage (and a suspect tranny) the car pulled inconsistent 1.70-1.80's. With the cage it pulls consistent 1.52-1.54's. I added some extra bracing today, which I beleive will translate into better weight transfer and 1.4X short times. I didn't get the bumper back on the car so I didn't take the car to the track this afternoon. I took the wife to see ARGO instead...

The track is open on Sunday so I will drive over and do some testing then, weather permiting. I want to see a sub 6.55 @ 108-112 1/8 mile pass with 18-19psi and pump gas. That will que me up to bring the car to the 1/4 mile track and break into the 9's with pump gas as long as the ECU govern issue is corrected. From then I will need race gas, 22psi AND a good day at the track to surpass that SLR's record 9.68 run. Luckily November and December racing in Texas is about as perfect as you can get at the track.

Dynodaddy

Ok, I got to the track and the good news is that the bracing I added helped quite a bit. I cut a 1.461, 1.481 and a 1.476 tonight. The bad news is the rev limiter issue isn't fixed, but I think we have it narrowed down.

Best Run was:
60' 1.461
330 4.300
mph 78.99
1/8 6.676
mph 102.25

Dynodaddy

Here is the image of the timeslip, looks like the third quickest 1/8 on Dragtimes even with a horrible MPH.

RaceHorse

Nice 60 ft times, you are certainly showing your dyno numbers are for real for any of the non-believers. Whats your car's race weight at this point? Hopefully you get a chance to get things sorted before 2012 is over any upcoming track days planned? A long trip to MIR in November for the rental???

twingtx

Very nice 60! 1.4's is actually rediculous. I suppose the big tire helps, or...I have to suspect that you are running much lighter weight than the rest of us?

I'm on the chase to the 9's too. Although I'm in the early stages and just barely broke into the 10's last week. It will be a while.

I was happy to cut a 1.6 at all.

What I'm afraid of is the 102MPH trap speed at half track (a lot of cars seem to top out there). I've run it about 10 times now regardless of what I run for trap at the 1/4 and each time ET is 10.9X.

What is your reason for the low 1/4 mile trap? I've hit anywhere between 125 mph to 128 mph on the 10.9 runs.

Here are a couple of my slips.

twingtx

Nevermind. Saw your note about why it trapped 120mph. Can't wait to see your full 1/4 mile slip.

Dynodaddy

The car ran a 11.0@132 the first time I ran it at the 1/4 mile track 6 months ago. That is the run responsible for the complete failure of the stock tranny. Before that run I tested at the 1/8 mile track and trapped around 105 in the 1/8 with 14-15psi and 93 octane. I developed a limiter issue that was somehow created with the higher stall converter I put in the car with the new tranny. I just came back from Houston this afternoon to get the tranny computer reflashed which i hope resolves the issue. As soon as this issue is resolved the car will run a <6.5@108-112mph. Another issue may arise with the 1/4 trap speed but time will tell. Even if I coast through the 1/4 mile at 135 it will be enough for a high 9 second run.

The 1.4x short times are directly related to the 97lb full cage I had to put in the car to continue running at the track. the addition of another 7lbs of bracing in the rear of the cage dropped the 60' times from 1.52's to 1.46's.

Dynodaddy

I have taken weight out of the car but also added 100lbs of roll cage, 125lbs of intercoolers, piping, 40lbs of inter cooler water, etc. None of the tracks have scales that work so I don't know what race weight is. I can tell you for a fact that the race seats and 5pt harnesses weighted 108lbs less than the factory hardware, but are nowhere near as comfortable.

My dyno numbers are still fake because it is impossible for an individual to do what numerous companies failed to do with larger engines.

My schedule is so tight with work, prior commitments and planned vacations that I am only taking the car to local tracks this year. I literally have no spare time allotted until January.

mckinneathe

I compared it to another e55 there

Dynodaddy

Your pics are not displaying.

twingtx

Looking at your slips, I have no doubt that you're making serious power. Good luck on the chase for the 9's. I do think you will be in the 10's for a while at least until the turn of the year. From past experience, breaking into the 10's is easy. 9's a whole different story. Sometimes you're stuck in the low 10's for a very long time.

Making power on these big engines is a cakewalk if you've have some experience even with smaller turbo engines. Just bolting on bigger IC's alone was 50 WHP without even touching the tune. I'm just as encouraged as you are to go fast.

Man, I have to ask...are you really running "skinnies" up front? I thought people looked at me funny for driving to the track with Hoosier DR's on on the rears!

Again, best of luck and thanks for the inspiration man!

Dynodaddy

The programing isn't going to work. I am going to have face the facts and get tighter convertor to keep the engine from powering through up top. Working on getting the new convertor ASAP.

twingtx

So the engine is overpowering the converter (essentially slippage) and during the pass it makes it feel like it's governed? Interesting.

Hope you come up with a solution soon!

Dynodaddy

Update:

The new, bigger convertor FINALLY showed up and I put it in the car. I drove all the way to the 1/4 mile track Sat. made one run then it started raining. Looking back at the video the car jerked the front wheels off the ground 3-4" then smoked the tires after 20' and got sideways. I aborted the run.

Today I went to the 1/8 mile to get the new convertor dialed in, made two runs, cut a 1.65 then a 1.55. I came back to the pits to drop the tire pressure two more psi and ramp the launch boost pressure up a tad more. I left the line really hard and ended up damaging the rearend on this launch. Luckily I purchased a spare a while back just for this occasion and with any luck I'll be back at the track 2/23. I am not sold on this convertor yet and I have a felling that it will have to come out to be restalled. Maybe the fourth time will be the charm. I now have a $1500 9" convertor that is absolutly useless to me unless I want to run mid 10's.

RaceHorse

You must be pushing the limits on whatever stock MB parts still remain in the drivetrain. What rpms do you launch at? For me, with stock suspension and brakes anything more than 2200-2400 rpms and I was pushing through the brakes. Also I'm sure at that rpm I start getting close to peak torque so the motor mounts along with the rear can't be too happy. Then apply your numbers to the equation..... At this point does everything else seemed to be sorted out? I hope you find a tranny setup that works and aren't forced into a collection of paper weights. Keep at it and until then lets see some video. thanks!!!

greekviking

What stall rpm is this torque converter? It sounds like a 2500rpm.

I think if you install a 3000rpm stall speed, it might solve your problem.
The only 'down' side is that it might be favored for track use.

Try and find out if they could make a 2800rpm. This would be awesome for your beast.