|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
Anyone seen the "big bore throttle body" by riot racing?
|
|
03-08-2018, 07:27 AM | #67 |
Old Geezer
364
Rep 1,193
Posts
Drives: 08 E92 N53B30
Join Date: Jul 2007
Location: Budweis
|
I have BBTB in the mail. I’m wondering if I should do something about the intake manifold opening. BBTB is 80 mm and the manifold opening is 79 mm.
__________________
|
Appreciate
0
|
03-08-2018, 08:22 AM | #68 |
Colonel
3768
Rep 2,738
Posts |
I don’t think so the BBTB is actually 79.5mm when I measured it. And it’s restricted somewhat by the butterfly also so likely still doesn’t flow better than that manifold opening at 78mm
|
Appreciate
0
|
03-08-2018, 11:15 AM | #69 |
Basic Bimmer
520
Rep 935
Posts
Drives: E92 328i 6MT ///M
Join Date: Sep 2017
Location: B'ham
|
Wouldn't the air hitting that "shelf" created by the smaller manifold orifice create undesirable turbulence? Maybe use a Dremel or other sanding rotary tool to create more of a "ramp" at the "corner" of the manifold opening so that the air can more smoothly funnel in?
|
Appreciate
0
|
03-08-2018, 11:25 AM | #70 | |
Colonel
3768
Rep 2,738
Posts |
Quote:
|
|
Appreciate
1
atmosphericM519.50 |
03-08-2018, 12:12 PM | #72 |
Old Geezer
364
Rep 1,193
Posts
Drives: 08 E92 N53B30
Join Date: Jul 2007
Location: Budweis
|
I will probably use dremel. I was just wondered if anybody did the same. N53 is probably more sensitive to TB than N52.
__________________
|
Appreciate
0
|
03-09-2018, 12:05 AM | #73 |
Major General
3975
Rep 7,215
Posts |
I dont think its neccesary at all. For all the time, effort and mess it will make - its unlikely to make any difference.
|
Appreciate
1
Eins Suchtig61.00 |
03-10-2018, 08:27 PM | #77 |
Apex Forged 19", AA headers, MILVs, 3IM, Euro Intake, Swift Spec-R
88
Rep 255
Posts
Drives: 2013 328i coupe
Join Date: May 2016
Location: Forest Hill, MD
|
Biginboca any update on the results? Do you think the initial slowdown you experienced was because of the throttle adaptations?
|
Appreciate
0
|
03-10-2018, 09:04 PM | #78 |
Colonel
3768
Rep 2,738
Posts |
Yes I do think the adaptations were an issue. From what I’m seeing now it seems BBTB is pulling comparable to the stock in the midrange and making more power up top.
|
03-11-2018, 10:20 AM | #79 |
Colonel
3768
Rep 2,738
Posts |
Also wanted to add the TB codes I had never came back after I reset adaptations. And I’ve been doing some hard pulls and a few quarter mile runs so that seems to be all fixed up as far as I can see.
|
Appreciate
0
|
03-11-2018, 10:45 AM | #80 |
Lieutenant General
2304
Rep 12,570
Posts
Drives: Z4 M, X5, GX460
Join Date: Apr 2008
Location: CT
iTrader: (99)
Garage List F15 X5 xDrive35i [8.75]
E86 Z4 M [10.00] F10 550i (Retired) [9.17] F25 X3 xDrive35i (R ... [9.43] E82 135is (Retired) [9.50] E85 Z4 M (Retired) [9.41] E90 328i xDrive (Re ... [9.25] E86 Z4 3.0si (Retired) [9.07] |
45 min if your first time. Afterwards can do in 30 mins... just be sure to get a new rubber o-ring
|
Appreciate
1
Noir883.00 |
03-11-2018, 11:47 AM | #81 |
Colonel
3768
Rep 2,738
Posts |
I just swapped the o-ring from my original TB. It’s not a part that sees any heat or fluids so I don’t see any reason not to reuse it. It was still soft and perfectly fine as far as I could tell.
|
Appreciate
0
|
03-11-2018, 01:02 PM | #82 |
Lieutenant General
2304
Rep 12,570
Posts
Drives: Z4 M, X5, GX460
Join Date: Apr 2008
Location: CT
iTrader: (99)
Garage List F15 X5 xDrive35i [8.75]
E86 Z4 M [10.00] F10 550i (Retired) [9.17] F25 X3 xDrive35i (R ... [9.43] E82 135is (Retired) [9.50] E85 Z4 M (Retired) [9.41] E90 328i xDrive (Re ... [9.25] E86 Z4 3.0si (Retired) [9.07] |
Depending on mileage the old one may not provide full seal. For $8 it’s cheap insurance.
|
07-19-2018, 05:14 PM | #84 |
Major
620
Rep 1,402
Posts |
I know a guy who knows a guy who has a buddy that knows a guy who can bore a TB with a drill press. Not really, ha.
I do have another machinist friend that I use and he bores my Jeep 4.0L throttle bodies from 55mm to 62mm. He bead blasts the housing and makes the blades and bores the bodies. I have 2 spare N52 throttle bodies now. I will ask him if he can do these also. He will just have to make another fixture for the lathe. Anybody else have any spare TBs laying around? Anybody else interested in a 80mm N52 TB for less than Riot's $350? |
Appreciate
0
|
07-19-2018, 06:16 PM | #85 | |
Colonel
3768
Rep 2,738
Posts |
Quote:
Since the throttle body is wide open all the time I feel that those mods might be worthwhile with yours also to increase flow. Also I’m pretty sure the N54 TB is an easy big bore swap if you can get one with the matching plug. My WCR Big Bore bolted right up to the N54 manifold so I see no reason a N54 TB would not fit a N52 manifold. I see my pics form earlier in the thread disappeared from the host. Here they are again, stock has the black plastic butterfly and WCR the aluminum one: Last edited by Biginboca; 07-19-2018 at 06:23 PM.. |
|
Appreciate
1
Noir883.00 |
07-22-2018, 06:00 AM | #86 |
Major
620
Rep 1,402
Posts |
Does anyone know what the diameter of the N54 TB is?
IDK if I missed it, is the plug different on the N54 vs N52? Last edited by CobraMarty; 07-22-2018 at 06:20 AM.. |
Appreciate
0
|
07-22-2018, 09:19 AM | #87 |
Banned
2470
Rep 9,004
Posts |
|
Appreciate
0
|
Bookmarks |
|
|