vkapoormd

well, finally got my car back yesterday after they did the ECU / TT upgrade- it was a little wet down here in Socal, so i couldn't quite push it...nontheless when i got into some dry areas inland, i had some fun. Thus far, here are my observations - definitely feel that there is much less lag between takeoff's and gear shifts and also much smoother-it's amazing how much faster it feels like it gets to 60. Also, it seems effortless when i am on the freeway at 80, and i am at 100 in no time...much different than before (although it's not like it was a struggle before the upgrade). I need to do more driving to have a better idea of what it can do. The other thing is that previously, if i went between C and S modes, there was no manual mode, whereas after the upgrade, the M mode comes up as a separate one from C and S. So is that the best one to drive in?

RennTechV12

S; it's sport mode that starts in 1st gear and takes you all the way to redline at WOT. It's what I race in.

JackStraw

I'm sorry, but what does "WOT" mean?

RennTechV12

"wide open throttle"

100% accelerator

Foot all the way down on the gas pedal

vkapoormd

very nice; my gas mileage has plummetted!!!, but it's a thrill!!!! long live RENNTECH....

JackStraw

Thank you for the clarification. Two questions:

1) Does the car drive differently in comfort mode than it did before the modification?

2) Did the modification alter the throttle response? I find that in my unmodified car that the response to my input on the gas pedal is not linear, and if I put he pedal to the metal (WOT, I presume) something intervenes to keep me from taking off like a rocket. However, if I gradually increase pressure on the gas pedal, acceleration builds smoothly.

Jakpro1

Interesting...not even close to the HP you guys are putting down but went from 476 to around 585 and mileage has improved for me.

Around 23 highway.....was around 20 before. Maybe on the 5.4 it's due to them really leaning us out on the ECU.

Glad you like the Renntech....someday I am gonna try them out.

vkapoormd

well, on the freeway, i think am about the same (about 20 mpg, albeit driving much more agressively), but i think it has gone down in the city, because i am more concious of the upgrade and keep mashing on the throttle- however, the guy that did the upgrade did actually say that the Renntech upgrade makes the car more fuel efficient, but most owners don't gain it, because they just keep mashing the pedal.!!!! oh well....

vkapoormd

how do you like your LSD? has it made a big difference for you? thinking of adding it in my SL now....

vraa

It could be the ESP kicking in?

RadSteve

I was just as happy with my upgrade..60 to 100 is the most amazing thing to me.

vkapoormd

agreed.....

ano0oj

yah, its been a few days since my dad did the renntech upgrade on the Sl600 as well. you can certainly feel a HUGE difference during take off and pick up. RennTech reps. came to the dealership today because my dad said the car didn't have enough torque, so they came to check it out and to finally get our badge. I don't know the status, of the car.
but none the less, tear that thing apart!

spanky

Has anyone ever thought of or had a boost gauge installed on a SL600? I wonder what the boost of the car was before and after the upgrade.

Yellow Fever

Where did you get your Renntech Upgrades done? Is there a shop in So Cal?


Thanks

J

Auraraptor

Do 600s have limited slip stock? Has he installed one?

vkapoormd

Yeah, good shop here in West LA - called Meridian Automotive, number is 310 475-2788; ask for Gary - tell him Vishal referred you...he'll take care of you. Email me with any questions.

vkapoormd

i think it does have one stock; not planning on adding it at this time...