Looking for Advice on a FBO Upgrade/Refresh (Single Turbo?)

Torgus

Captain
Nov 6, 2016
1,045
Boston
I am currently spraying 1000CC of 100% meth into my CP with two nozzles. To find out how much you need to spray for your application read:

100% methanol: 20-25% methanol/fuel ratio or 1.5-2cc per BHP. 600whp would be say ~700 BHP so aquamist says I should be running 1050cc - 1400cc of meth. I should probably run 3 smaller nozzles and aim for ~1300.

I have an aquamist full set up so it is a stand alone controller but works with the factory DME and actually sits right beside it in the box. There is a good deal of safety built in. If there is ever a disruption in flow it automatically opens the wastegates to save your engine. It's probably one of the best meth injection kits out there and the gauge and low fuel level sensor is nice. The one @Twisted Tuning offers is also good. AM has a ton of fail safes you can use and it is really advanced. The HS4 was designed for DI engines like the N54: http://www.aquamist-direct.com/806-065-hfs4-v3-1-system-for-di-engines-the-most-advanced-system-to-date/

I have had zero heat management issues with my top mount fwiw. Get whatever suits you best. For 5k I wanted to see my turbo in all it's glory.

It would be fun to make a sleeper build with a bottom mount and leave all the twins inlet pipes airbox etc. in tact as much as you could. Pop the hood it looks basically 100% stock. Recirc the dump pipes, stock exhaust with maybe a cutout on the DP. Probably need AWD so you could keep the stock rims and just get sticky tires. 07 E90 white with that shit tan interior and fugly rims should would do well. Maybe run a sneaky pete NOS shot from under the passenger seat. https://www.jegs.com/i/NOS/741/05029/10002/-1
 
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fmorelli

Colonel
Staff member
Aug 11, 2017
2,137
Virginia
I would go solid metal subframe bushings as said above no NVH. Should have come solid from the factory. I bought mine from Turner: https://www.turnermotorsport.com/p-1452-rear-subframe-bushingsmount-set-turner-solid-aluminum-e82-e9x/

I would also do solid diff bushings also but you will get gear whine. I don't mind the whine but some people may: https://www.turnermotorsport.com/p-1571-rear-differential-mounts-solid-aluminumdelrin-race-e82-e9x-f22-f3x/

Another good idea would be a diff lockdown kit:https://burgertuning.com/products/bms-differential-support-bracket-brace-for-e82-135i-and-e9x-335i
Great post all around, @Torgus. It seems to me, mostly pondering out loud, that one wants to do one or the other but not all, if NVH is a concern. If one keeps rubber in the subframe but locks down the diff mounts/bracket, then the NVH gets dealt with at the subframe bushings. If solid bushings on the subframe, then rubber handles NVH on the diff mount. But no rubber anywhere ... seems like that's where the NVH problem comes into play. Is that right? Or ... ?

While I have an E46 rear end on the Z4, we are discussing the approach on mine now ... since who runs 600whp on an E46? lol ... @[email protected] says he has another solution up his sleeve to prevent subframe movement on the E46 subframe. We'll see.

Filippo
 
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scrllock

Specialist
Dec 17, 2018
64
Great post all around, @Torgus. It seems to me, mostly pondering out loud, that one wants to do one or the other but not all, if NVH is a concern. If one keeps rubber in the subframe but locks down the diff mounts/bracket, then the NVH gets dealt with at the subframe bushings. If solid bushings on the subframe, then rubber handles NVH on the diff mount. But no rubber anywhere ... seems like that's where the NVH problem comes into play. Is that right?
Curious about this as well, anyone know if there's noticeable nvh with rubber RSFB and a diff brace? Sounds like with the brace going solid anywhere will rattle things up.
 

Torgus

Captain
Nov 6, 2016
1,045
Boston
Great post all around, @Torgus. It seems to me, mostly pondering out loud, that one wants to do one or the other but not all, if NVH is a concern. If one keeps rubber in the subframe but locks down the diff mounts/bracket, then the NVH gets dealt with at the subframe bushings. If solid bushings on the subframe, then rubber handles NVH on the diff mount. But no rubber anywhere ... seems like that's where the NVH problem comes into play. Is that right? Or ... ?

While I have an E46 rear end on the Z4, we are discussing the approach on mine now ... since who runs 600whp on an E46? lol ... @[email protected] says he has another solution up his sleeve to prevent subframe movement on the E46 subframe. We'll see.

Filippo
Not all of my posts are shit posts ;)

I think the best option is Solid Subframe bushings. I believe all of the newer BMWs come with solid from the factory. I think everyone should do this upgrade. The stock rubber bushings are trash. Parts are cheap it's the labor you pay to drop the sub frame and have them pressed in that is expensive. Probably more than the parts cost honestly even if you get an inexpensive shop. Again, if you do the subframe bushings do the SS brake lines while you are there. I would also suggest installing an upgraded rear sway bar if you ever plan on getting one as you have to drop the rear subframe to install that as well. Might as well knock out all 3 at once or be prepared to pay to drop the subframe more than once.

If you don't want to go solid for the diff because of noise(gear whine's pitch and loudness will vary by car) I think the M3 bushings and a diff lock down plate would be the best way to go. That way you get slightly stiffer bushings and a lockdown plate I think you should have zero gear whine. I installed both at once but I don't recall people complaining about gear whine with the lockdown plates, only when they have the solid diff bushings installed. I only notice the whine on the highway but with all the extra noises my car makes with the T51R turbo mod and slightly loud exhaust I barely notice it anymore unless I want to listen to it. Yes it is there, but there are other sounds it has to contend with to get my attention, if that makes sense.

FWIW if you want a rear diff lock down plate gent the ones that are press bended not welded. The welded ones can and have failed at the weld. I like the BMS plate: https://burgertuning.com/products/bms-differential-support-bracket-brace-for-e82-135i-and-e9x-335i
 
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Twisted Tuning

Lieutenant
Platinum Vendor
Oct 25, 2016
848
New York
Also note that @Twisted Tuning now offers a dme-integrated meth flow sensor that uses the n54 flex fuel logic if you're still looking at modern safety methods.
Thanks for the bushing advice and experience. When I get a chance it looks like I’ll need to start putting a spreadsheet together.

On the meth safety front, I got the kit way back when meth was new to the platform. It started as just cooling, so people weren’t running any safeties. Then people started relying on it for octane, then for fueling. This led to people starting to look into safeties, but if I remember correctly, Aquamist was the only Procede compatible option and it was constantly out of stock.

The Twisted Tuning kits look interesting. They seem to highly prefer the port injection method. I’m thinking if I go down the PI path I might as well use E85. The fact that you could use the DME/MHD to control it is really cool though. If I’m reading correctly, you’d have to pick between meth and running EXX via a flex fuel sensor though. I’m wondering if there is a option to do both.

For my flowguard setup, being that it uses the Flex fuel logic, you can only do one or the other currently. But if you're running meth over flex fuel, then the FG-1 setup can't be beat for DME integration. And if you happen to be using our Meth controller or torqbyte, then you have some added features and functionality you can tie into everything.

In terms of Direct Port Meth versus traditional Chargepipe or Throttle body setup. We offer both styles, but will always recommend jumping to Direct port. Why? less to no distribution issues into the intake manifold. You can fine tune the kit more. You can flow more meth without running into the issues of atomization of larger nozzle use.we've run our DP meth kits up to around 750-800whp without much issue at all other than reaching a point where nozzles needed to increase fueling.
 
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