WOT 4th-6th.. Bad?

damonp335i · 10-07-2015, 04:19 PM

What's up guys. I was told to only run my car WOT for 2-3 gear pulls because "doing multi gear pulls up to high speeds puts extreme back pressure on the turbos even with downpipes"

I would like to know what everyone does when they wanna go past 110ish mph? Obviously you can just cruise over that but even if you run the car at the track you still have to be WOT in 4th maybe even 5th (never ran my car yet so idk)

Any solution to this?

C.Pop · 10-07-2015, 05:10 PM

You're a 6MT so redline in 3rd is what, about 115 or so? Redline in 4th is 146 I think.

In a general sense a more conservative tune (i.e. not on the ragged edge) will tolerate the much longer time under high load. Just make sure your FMIC is up to it and your fuel is good.

Jeff@TopGearSolutions · 10-07-2015, 05:12 PM

Any use of a machine will put more wear on it, especially with more load and heat. Whoever told you that is partially right except for the fact that it's an overly conservative blanket statement. It would only be an issue if you were doing it daily or exceptionally often.

How often do you find yourself in excess of 120MPH??

PS I've put this car and all my others past 150 on dozens and dozens of occasions. Still going strong. IMO don't worry about it.

damonp335i · 10-07-2015, 05:13 PM

Quote:

Originally Posted by C.Pop

You're a 6MT so redline in 3rd is what, about 115 or so? Redline in 4th is 146 I think.

In a general sense a more conservative tune (i.e. not on the ragged edge) will tolerate the much longer time under high load. Just make sure your FMIC is up to it and your fuel is good.

Oh I guess so I just always find myself in 4th 5th gear. My fuel pump is stock and seems to be holding up great on e50..

http://www.datazap.me/u/damonp335i/l...11-12-13-14-26

I just don't wanna blow the thing up. I had it up to 6000rpm in 6th if top of 4th is 146 I had to be going 170+.. Never figured it out

tc535i · 10-07-2015, 05:14 PM

6th puts the most load on the motor, combine that with the longest gearing and slowest accelerating gear and you can wind up with an expensive paperweight on your hands

and, like it's been said, there's never a reason to go full load in 6th for long anyways, downshift if you need to accelerate

damonp335i · 10-07-2015, 05:15 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

Any use of a machine will put more wear on it, especially with more load and heat. Whoever told you that is partially right except for the fact that it's an overly conservative blanket statement. It would only be an issue if you were doing it daily or exceptionally often.

How often do you find yourself in excess of 120MPH??

True. And not very often before I was running ethanol and now i can't seem to slow down.. Gonna get in trouble soon if I don't relax but I can't help it sometimes. Plus I've been taking logs pretty frequently trying to dial in the tune

LMB335IS · 10-07-2015, 05:16 PM

Never heard of that before. I hammer it for 1/2 mile events, three gear logs, and 1/4 mile simulations with my Vbox. I run a very aggressive setup on stock turbos and my logs are perfect. And if my stock snails pop, oh well, on to Hexons but I certainly don't worry about it.

Jeff@TopGearSolutions · 10-07-2015, 05:17 PM

Quote:

Originally Posted by damonp335i

True. And not very often before I was running ethanol and now i can't seem to slow down.. Gonna get in trouble soon if I don't relax but I can't help it sometimes. Plus I've been taking logs pretty frequently trying to dial in the tune

Enjoy your car. Whoever told you that is being overly conservative.

Just make sure your datalogs are good and the octane is sufficient.

I know guys with nitrous have the 15 second rule but that's because nitrous has insanely hot EGT and combustion temps. We are nowhere near those levels of heat.

damonp335i · 10-07-2015, 05:18 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

Quote:

Originally Posted by damonp335i

True. And not very often before I was running ethanol and now i can't seem to slow down.. Gonna get in trouble soon if I don't relax but I can't help it sometimes. Plus I've been taking logs pretty frequently trying to dial in the tune

Enjoy your car. Whoever told you that is being overly conservative.

Just make sure your datalogs are good and the octane is sufficient.

I know guys with nitrous have the 15 second rule but that's because nitrous has insanely hot EGT and combustion temps. We are nowhere near those levels of heat.

Okay cool. Thanks. And that makes sense about the nitrous.

Any rough idea of what 6k rpm in 6th gear is speed wise?

damonp335i · 10-07-2015, 05:19 PM

Quote:

Originally Posted by LMB335IS

Never heard of that before. I hammer it for 1/2 mile events, three gear logs, and 1/4 mile simulations with my Vbox. I run a very aggressive setup on stock turbos and my logs are perfect. And if my stock snails pop, oh well, on to Hexons but I certainly don't worry about it.

Hexon > RB ? Lol don't want to start one of these threads but I'm looking at new turbos in spring and got plenty of time for research..

Jeff@TopGearSolutions · 10-07-2015, 05:20 PM

Quote:

Originally Posted by damonp335i

Okay cool. Thanks. And that makes sense about the nitrous.

Any rough idea of what 6k rpm in 6th gear is speed wise?

Not sure at 6K but I thought this car topped out at about ~175MPH.

damonp335i · 10-07-2015, 05:22 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

Quote:

Originally Posted by damonp335i

Okay cool. Thanks. And that makes sense about the nitrous.

Any rough idea of what 6k rpm in 6th gear is speed wise?

Not sure at 6K but I thought this car topped out at about ~175MPH.

I have a log of that but I wasn't logging vehicle speed and I doubt I'll ever get that good of an opportunity to go that fast again to find out how fast I was going but had to be better then 165

Jeff@TopGearSolutions · 10-07-2015, 05:23 PM

Quote:

Originally Posted by damonp335i

I have a log of that but I wasn't logging vehicle speed and I doubt I'll ever get that good of an opportunity to go that fast again to find out how fast I was going but had to be better then 165

Actually I think mechanically it's about 182 MPH.

I leave those top speeds runs to my z06, it's a little more stable and has better brakes haha. The C6Z will do nearly 200 in 5th. I haven't gotten there yet.

LMB335IS · 10-07-2015, 05:25 PM

Quote:

Originally Posted by damonp335i

Quote:

Originally Posted by LMB335IS

Never heard of that before. I hammer it for 1/2 mile events, three gear logs, and 1/4 mile simulations with my Vbox. I run a very aggressive setup on stock turbos and my logs are perfect. And if my stock snails pop, oh well, on to Hexons but I certainly don't worry about it.

Hexon > RB ? Lol don't want to start one of these threads but I'm looking at new turbos in spring and got plenty of time for research..

Not gonna get into on here but I have my reasons and I'd be happy to share through PMs

damonp335i · 10-07-2015, 05:29 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

Quote:

Originally Posted by damonp335i

I have a log of that but I wasn't logging vehicle speed and I doubt I'll ever get that good of an opportunity to go that fast again to find out how fast I was going but had to be better then 165

Actually I think mechanically it's about 182 MPH.

I leave those top speeds runs to my z06, it's a little more stable and has better brakes haha. The C6Z will do nearly 200 in 5th. I haven't gotten there yet.

Yeah the brakes weren't happy at this speed haha. My friend has a heads/cam c6 and he pulled on my other friends gsxr750 the other night.. He said next plan is to boost the c6 and that the c6z doesn't respond as well to boost but I've heard those cars go 10s stock with DRs. Jealous.. But I'm happy with my 335

damonp335i · 10-07-2015, 05:31 PM

Quote:

Originally Posted by LMB335IS

Quote:

Originally Posted by damonp335i

Quote:

Originally Posted by LMB335IS

Never heard of that before. I hammer it for 1/2 mile events, three gear logs, and 1/4 mile simulations with my Vbox. I run a very aggressive setup on stock turbos and my logs are perfect. And if my stock snails pop, oh well, on to Hexons but I certainly don't worry about it.

Hexon > RB ? Lol don't want to start one of these threads but I'm looking at new turbos in spring and got plenty of time for research..

Not gonna get into on here but I have my reasons and I'd be happy to share through PMs

Okay cool

Jeff@TopGearSolutions · 10-07-2015, 05:45 PM

Quote:

Originally Posted by damonp335i

Yeah the brakes weren't happy at this speed haha. My friend has a heads/cam c6 and he pulled on my other friends gsxr750 the other night.. He said next plan is to boost the c6 and that the c6z doesn't respond as well to boost but I've heard those cars go 10s stock with DRs. Jealous.. But I'm happy with my 335

I have a GSXR 750 and after about 140 it's pretty slow. Takes forever to get to 170.

C6Z can go 10's stock on DR (as long as you can drive and have a good track/DA/conditions).

I went on street tires and cut 11.5 with a horrible 60 foot.

The Z06 does respond to boost and cam. I picked up 90WHP with a Cam only. The problem with the C6z is the Ls7 block is too thin. It cant handle as much boost or power as the LS3.

If you have a C6Z on stock block, you shouldn't go much past 620WHP or you are playing with fire. The block is just too thin.

I've been debating on putting a blower on it for a while but I think I'll leave it alone for now.

spxxx · 10-07-2015, 09:34 PM

Lol I was just trying to scare some sense into you to deter you from winding it out to Redline in 6th gear with a tune that isn't completed yet. That is how you blow things up... We're almost dialed in!

Hokie_BMW · 10-07-2015, 09:50 PM

I believe these cars are geared to 195 or so at redline in 6th gear. I was reading a thread on it a year or so ago on b-forum

Jeff@TopGearSolutions · 10-08-2015, 08:44 AM

Quote:

Originally Posted by spxxx

Lol I was just trying to scare some sense into you to deter you from winding it out to Redline in 6th gear with a tune that isn't completed yet. That is how you blow things up... We're almost dialed in!

csu87 · 10-08-2015, 08:51 AM

I would follow the advise from your tuner and not run to the internet for advice. But thats just me.

Running to redline in 6th with an incomplete tune on a stock LPFP on e50 is just asking for trouble unless the tune is dialed in.

Tangent · 10-08-2015, 12:00 PM

Quote:

Originally Posted by damonp335i

...

Any rough idea of what 6k rpm in 6th gear is speed wise?

Easy enough to figure out. Your daily drive should let you see your speed at 3k rpm in 6th gear. Just double that.

10-07-2015, 04:19 PM	#1
damonp335i Captain 75 Rep 731 Posts Drives: 2008 335i 6MT Join Date: Jul 2015 Location: Central Jersey iTrader: (8) Garage List 2008 BMW 335i [0.00]	What's up guys. I was told to only run my car WOT for 2-3 gear pulls because "doing multi gear pulls up to high speeds puts extreme back pressure on the turbos even with downpipes" I would like to know what everyone does when they wanna go past 110ish mph? Obviously you can just cruise over that but even if you run the car at the track you still have to be WOT in 4th maybe even 5th (never ran my car yet so idk) Any solution to this? __________________ 2008 335i Coupe / Alpine White / 6MT / Fully Built Motiv Closed-Deck Motor / Motiv ST Kit / XR 105/69S / Motiv Twin Disc / VRSF 7.5 FMIC / ActiveAutowerke Exhaust / EOS Intake Manifold w/ 1050cc injectors / TiaL BOV / External VTA PCV / Quaife LSD / DSS Axles / KW V3Coilovers
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10-07-2015, 05:10 PM	#2
C.Pop First Lieutenant 65 Rep 385 Posts Drives: 335i Join Date: May 2013 Location: AZ iTrader: (0)	You're a 6MT so redline in 3rd is what, about 115 or so? Redline in 4th is 146 I think. In a general sense a more conservative tune (i.e. not on the ragged edge) will tolerate the much longer time under high load. Just make sure your FMIC is up to it and your fuel is good. __________________ 2007 E90, 6MT, VRSF 7" FMIC, RR DP's, Vargas Stage 2+ (19t unclipped), CP-e Charge Pipe/Tial BOV, BMS DCI, Fuel-it! Stg 2 LPFP, E66, 118k+ miles Brentuned
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10-07-2015, 05:12 PM	#3
Jeff@TopGearSolutions 3441 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Any use of a machine will put more wear on it, especially with more load and heat. Whoever told you that is partially right except for the fact that it's an overly conservative blanket statement. It would only be an issue if you were doing it daily or exceptionally often. How often do you find yourself in excess of 120MPH?? PS I've put this car and all my others past 150 on dozens and dozens of occasions. Still going strong. IMO don't worry about it.
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10-07-2015, 05:14 PM	#5
tc535i Lieutenant Colonel 215 Rep 1,818 Posts Drives: 2007 335i, 2001 330i, 1995 M3 Join Date: Sep 2013 Location: West Los Angeles iTrader: (1)	6th puts the most load on the motor, combine that with the longest gearing and slowest accelerating gear and you can wind up with an expensive paperweight on your hands and, like it's been said, there's never a reason to go full load in 6th for long anyways, downshift if you need to accelerate
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10-07-2015, 05:16 PM	#7
LMB335IS Sua Sponte 1299 Rep 2,850 Posts Drives: 2013 LMB 335is Join Date: May 2008 Location: FOB FL iTrader: (21) Garage List 2013 BMW 335is [8.84]	Never heard of that before. I hammer it for 1/2 mile events, three gear logs, and 1/4 mile simulations with my Vbox. I run a very aggressive setup on stock turbos and my logs are perfect. And if my stock snails pop, oh well, on to Hexons but I certainly don't worry about it. __________________ 335is/DCT-M3 GTS software-M3 drivetrain-M3 GWS-KOMBI-DSC-SZL/MHD/BQ Tuning IG@ClustersandCoding
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10-07-2015, 09:34 PM	#18
spxxx Boost 1354 Rep 3,692 Posts Drives: 135i M-Sport Join Date: Feb 2014 Location: Valley of Silicon, CA - United States iTrader: (9)	Lol I was just trying to scare some sense into you to deter you from winding it out to Redline in 6th gear with a tune that isn't completed yet. That is how you blow things up... We're almost dialed in!
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10-07-2015, 09:50 PM	#19
Hokie_BMW Captain 59 Rep 661 Posts Drives: 2009 335i Sedan Join Date: Apr 2013 Location: NC iTrader: (0)	I believe these cars are geared to 195 or so at redline in 6th gear. I was reading a thread on it a year or so ago on b-forum
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10-08-2015, 08:51 AM	#21
csu87 Banned 2134 Rep 3,554 Posts Drives: 09 335xi Join Date: Nov 2013 Location: Northern Colorado iTrader: (0)	I would follow the advise from your tuner and not run to the internet for advice. But thats just me. Running to redline in 6th with an incomplete tune on a stock LPFP on e50 is just asking for trouble unless the tune is dialed in.
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