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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > 20+ PSI on 4th gear



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      09-23-2010, 10:01 AM   #1
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20+ PSI on 4th gear

This is a 3rd and 4th gear pull where the starting rpm is very low on 3rd and the boost climbs to 19 PSI. Directly when 4th gear is engaged the boost jumps to 20+ PSI. 4th gear is engaged far to early but the purpose is just to show how the Procede builds and hold boost quite well.

The fuel gauge is used as a boost gauge, where full tank represents 20 PSI (half tank is 10 PSI etc.).

Select HD video and turn up the volume

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      09-23-2010, 10:39 AM   #2
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nice but i dont really like the full tank gauge feature :/
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      09-23-2010, 10:43 AM   #3
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Quote:
Originally Posted by MusclezMarinara View Post
nice but i dont really like the full tank gauge feature :/
The turbos may agree with you but I honestly believe the are not working harder now with BigTom IC than at 18.5 PSI before with a restrictive IC.
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      09-23-2010, 10:52 AM   #4
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Im running 18-20 lbs with a AMS intercooler, muffler delete, and DCIs, so you should be good if im good on stock turbos
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      09-23-2010, 11:07 AM   #5
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Quote:
Originally Posted by MusclezMarinara View Post
Im running 18-20 lbs with a AMS intercooler, muffler delete, and DCIs, so you should be good if im good on stock turbos
Thanks, good to hear
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      09-23-2010, 12:05 PM   #6
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You go to Germany a lot
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      09-23-2010, 12:08 PM   #7
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You go to Germany a lot
Yes almost every day
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      09-23-2010, 12:13 PM   #8
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Quote:
Originally Posted by MusclezMarinara View Post
nice but i dont really like the full tank gauge feature :/
you know you can just turn it off if you dont like it. no ones forcing you to use it.
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      09-23-2010, 12:28 PM   #9
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I ran 20 psi at the race track. I probably wouldn't want to run that much boost for the long term.
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      09-23-2010, 03:04 PM   #10
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lower it before you blow anything! you need more support parts to help turbos
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      09-23-2010, 03:08 PM   #11
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lower it before you blow anything! you need more support parts to help turbos
Such as ?
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      09-23-2010, 03:28 PM   #12
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Here the thing I want to run boost like the upgraded turbos but IMO 20 psi is a bit extreme, yet I dont have the money to get the upgrade just yet, so in doing without upgraded turbos I opted to use nitrous and boost 13-14 psi while on the bottle making the same power if not more than an upgraded turbo, but with lower boost psi which IMO will be safe!
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      09-23-2010, 03:40 PM   #13
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Quote:
Originally Posted by cn555ic View Post
Here the thing I want to run boost like the upgraded turbos but IMO 20 psi is a bit extreme, yet I dont have the money to get the upgrade just yet, so in doing without upgraded turbos I opted to use nitrous and boost 13-14 psi while on the bottle making the same power if not more than an upgraded turbo, but with lower boost psi which IMO will be safe!
It will for sure be much better for the turbos and I'll do the same when N20 support is available. I'm a bit worried though for taking the step to 500+ horses with N20. The mechanical load on pistons crowns etc. will be very high compared to a 400+ level w/o N20 and there is very little (reported) long term experience for a 500+ level on the N54 engine. The best way to move further is to be conservative on N20 power.
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      09-23-2010, 06:00 PM   #14
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Quote:
Originally Posted by R1000K3 View Post
It will for sure be much better for the turbos and I'll do the same when N20 support is available. I'm a bit worried though for taking the step to 500+ horses with N20. The mechanical load on pistons crowns etc. will be very high compared to a 400+ level w/o N20 and there is very little (reported) long term experience for a 500+ level on the N54 engine. The best way to move further is to be conservative on N20 power.
Well nitrous is not for everyday...Its for once in a while! But with all the safety measure that Procede will implement before allowing spray, it should be safe on the motor especially since psi is not anywhere near 18-20 psi
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      09-23-2010, 07:06 PM   #15
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Ouffff, 20 psi. . .

Car must be damn quick, wonder if it'll be reliable in the long run
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      09-23-2010, 07:22 PM   #16
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Quote:
Originally Posted by cn555ic View Post
Well nitrous is not for everyday...Its for once in a while! But with all the safety measure that Procede will implement before allowing spray, it should be safe on the motor especially since psi is not anywhere near 18-20 psi
Boost or Juice, Making more power is going to be detrimental on the engine.

But thats not going to stop anyone from having fun.

High boost with cooling tuned safely.... vs
Nitrous with its excessive torque bump and extreme EGT's tuned safely?

I'm not ragging on nitrous, I had it in my last car, believe me I love it, but lets not kid ourselves and say its safer cause it uses less boost. Its still gobs of power and power kills engines (keep all things the same).

500WHP+ is still 500WHP to the engine (And yes I know there are differences internally and how each method effects what, but generally speaking).

Edit - I already know people are going to pick the bajesus out of this post... lets see whos bored here LOL

Last edited by Jeff@TopGearSolutions; 09-23-2010 at 09:21 PM..
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      09-23-2010, 08:22 PM   #17
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What are you using to read your boost? If you are using your fuel gauge, although its a cool idea and works great, i wouldnt trust it to really measure boost. Get a real gauge on there.
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      09-23-2010, 09:11 PM   #18
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Quote:
Originally Posted by TMR View Post
What are you using to read your boost? If you are using your fuel gauge, although its a cool idea and works great, i wouldnt trust it to really measure boost. Get a real gauge on there.
Its really not too far off it at all (at high boost).

Ive read the fuel (boost gauge) vs a real gauge mounted in the manifold.

The only difference is the real gauge was read in the manifold psi, and the fuel one uses the TMAP.

Under Full boost, they are both on par. Its when you have partial boost (under 5 PSI) they have different readings; this happens because the TMap is pre-throttle body and when the throttle blade isnt fully open there is turbulence in that area showing a false increase in pressure.

3-4 PSI on the fuel boost gauge is usually 0 vacuum in the manifold.
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      09-24-2010, 12:45 AM   #19
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The only load the engine is seeing is cylinder pressure and temperatures. It is (almost) no difference if 500 whp is made from the turbos or N20 (except for the poor turbo units). It is never safe to be within the first users that start to use a higher power level than the majority, and N20 is never safe on these levels where it adds 100 hp on top of an engine that already is used on a high level of tune.

The plan here is to use N20 at trackday events only and never for DD. Based on what I've seen in the past the outcome is that more engines start to fall apart when more N2O users enters the scene. The Procede will make it much safer than it would be to use a simple system, but the risks are always there with the high power levels that are created by N2O. So unless there is not a solid budget for failed engines it is wise to be conservative both on the power level and the use of N20.
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      09-24-2010, 06:51 AM   #20
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Quote:
Originally Posted by R1000K3 View Post
The only load the engine is seeing is cylinder pressure and temperatures. It is (almost) no difference if 500 whp is made from the turbos or N20 (except for the poor turbo units). It is never safe to be within the first users that start to use a higher power level than the majority, and N20 is never safe on these levels where it adds 100 hp on top of an engine that already is used on a high level of tune.

The plan here is to use N20 at trackday events only and never for DD. Based on what I've seen in the past the outcome is that more engines start to fall apart when more N2O users enters the scene. The Procede will make it much safer than it would be to use a simple system, but the risks are always there with the high power levels that are created by N2O. So unless there is not a solid budget for failed engines it is wise to be conservative both on the power level and the use of N20.
I am sure the consensus with everyone is nitrous should ONLY be used occasionally even though when it is used it will be safe compared to other methods of spray...Its not to be used as a daily driver power mod, plain and simple!
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