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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > FYI - High FLow Throttle Body now available?



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      10-29-2006, 11:07 PM   #1
ksfrogman
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Dinan High Flow Throttle Body

High Flow Throttle Body (330i, xi Sedans)

Part # D760-3700
Price: $399.00
Labor Hours: 1.10
Emission Status: 49 State Emission Legal. (Let me guess, not legal in California?)
Special Notes: Exchange Price: $325 Refundable Core Deposit Required.
Peak HP Gain: 5 @ 6500 rpm
Peak Torque Gain: 4 lbs-ft @ 6500 rpm


The stock throttle bodies are bored from 76mm to 79mm for an 8% increase in air flow area. The High Flow Throttle Body reduces intake restriction for improved breathing, particularly at wide open throttle, producing additional horsepower and torque.

Maximum HP Gain: 5 @ 6500 rpm
Maximum Torque Gain: 4 lb-ft @ 6500 rpm

EDIT 11-3-06: Okay, it just arrived yesterday, and will have it installed next week.

Top:


Bottom:


Valve open:


Which I hope will be a nice complement to other induction enhancers such as the GruppeM intake and small ram air modification.
Attached Images
  
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      10-29-2006, 11:37 PM   #2
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yea, i have this part on order so ill post my review on it soon hopefully
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      10-30-2006, 10:38 AM   #3
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Quote:
Many people seem to be under the false impression that the new Valvetronic engines don’t have a throttle body. This is clearly not the case however the throttle body for these applications functions as part of the traction control system, as well as a “safety valve” of sorts. Regardless of the function, the stock size of the hole still represents a restriction of intake air-flow, making the larger bore of the Dinan high flow versions enable the engine to breathe better for more horsepower and torque, most effetively in wide-open throttle scenarios.
Which explains how the car manages to cut out power or lug just when you feel the car should powerspin the wheels at low speed, high-throttle situations, especially when flooring it around corners with DSC/DTC on.
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      10-30-2006, 11:04 AM   #4
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That is interesting thanks for shedding light on this. I was starting to wonder about this since it wouldnt make sense for dinan to just produce a part that didnt have any function in a valvetronic engine.
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      10-30-2006, 11:08 AM   #5
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how will this improve/hinder (better or worse) gas mileage and why? Will it also void warranty? Is this DIY?

Wow, I can go from 255 ponies to 260 ponies
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      10-30-2006, 11:34 AM   #6
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Quote:
Will it also void warranty? Is this DIY?
From the looks of it, pretty easy DIY. A Dinan part will carry the remainder of the current BMW warranty, but I'm pretty sure it has to be installed by a certified Dinan bmw dealer. Which negates the DIY.

So you're looking at $399/$325 with core exchange? (or was it $399 for the part and an additional $325 core deposit?) and then another $150-$200 for install depending on what your dealer's hourly rate is.

Mine claims to be a Dinan dealer, as well as ACS, but every time I've talked to anybody there about either Dinan or ACS they instantly say I don't want to do it because it voids your warranty. Go figure. I'm sure it's an education issue and I just need to find the right person at the dealer.

For 5hp? Iffy.
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      10-30-2006, 11:47 AM   #7
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Dont forget that you will probably also have to Match-port the opening on the intake manifold where the throttle body mounts otherwise you'll have a step-lip protrusion which will actually reduce HP...
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      10-30-2006, 12:44 PM   #8
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Seriously, is obtaining a MAXIMUM, I repeat a MAXIMUM, of 5hp and 4 lbs-ft torque in that region of the power band even worth ($$) this mod. Additionally, where is this so called horse power increase seen? At the wheel or at the crank? Regardless of what people say, the throttle body in the current 3.0L valvetronic engines is not a high source of air restriction. As a matter of fact Dinan just proved exactly that. There was never really a question of whether these engines had a throttle body or not. The true question was aside from it being there for incase sh*t happens, does it really play any significant role in the performance characteristics of the valvetronic engine. Most said no based on prior attempts of these so called high flow throttle body on the V8 valvetronic engines as well as BMWs own literature which states the ineffectiveness of the throttle body. I guess Dinan felt otherwise. Hopefully this so called High Flow Throttle Body of theirs is part of a yet to be announced product that will require better air flow to generate the power I'm really looking for.

Yawn…… Somebody please wake me when these tuners finally stop coming at us with these placebo mods and have something on the table we can finally call a performance mod.
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      10-30-2006, 05:09 PM   #9
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the throttle body in my opinion is a good buy because when and if you are ever planning to use forced induction on your car, the gains will increase way more. the 5hp is not worth the money if your not planning to turbocharge ur car in my opinion
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      10-30-2006, 05:13 PM   #10
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does anyone know if dinan ships overseas?
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      10-30-2006, 06:04 PM   #11
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There is definitely a core charge for this.

I had one in my E46 330. If it made a difference, I didnt notice it.
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      10-31-2006, 02:19 AM   #12
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Quote:
Originally Posted by shadye90
Dont forget that you will probably also have to Match-port the opening on the intake manifold where the throttle body mounts otherwise you'll have a step-lip protrusion which will actually reduce HP...
That's an interesting thought. I'd want to install this myself just to see how they match up. On my Kawasaki ZXi, I used Buckshot Carbs, which were actually bored-out Mikunis, then port matched them to the intake with a considerable amount of sanding (via flapper wheels + air compressor). A pipe wasn't available, so we smoothed out the aluminum casting. Every little bit counted and we were able to squeeze out an extra 25hp from that 2-stroke motor. Every little bit counted. In the end, each modification added little improvement, but collectively made a big difference in the outcome.
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      10-31-2006, 10:42 AM   #13
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Ill measure up the 330 manifold I have sitting in my garage (someone buy it!) and see how big the opening is where the throttle connects.
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      10-31-2006, 04:18 PM   #14
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Quote:
Originally Posted by RichP
Ill measure up the 330 manifold I have sitting in my garage (someone buy it!) and see how big the opening is where the throttle connects.
Thanks Rich. I just confirmed with the local Dinan rep that this item was just released yesterday.

I placed an order with Long Beach BMW that also confirmed the part is in stock. It should arrive by the end of the week, and will be installed next Thursday. Price of install is about $120, which to save the hassle of taking the piece home, paying a core charge, bringing the old part back, etc., is worth it to me for the added warranty coverage.

It is my understanding that the ports will match up exactly like the original OEM one. The difference is with the inner diameter where the throttle body flap is. I will attempt some comparison photographs next week. I realize this is a little bit of bang for a lot of buck, but this should pair up nicely with the GruppeM and a possible ram air modification. I'll do a post-install dyno when time permits. Let the gas guzzling begin!
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      10-31-2006, 04:58 PM   #15
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ha!

Yeah, it matches up fine. They take stock throttle bodies (hence your core charge) Bore them out and use a bigger plate (that is engraved with "D" on it)

I agree, its worth $120 for the install for not dealing with the core charge. Based on manifold swapping, I would say it would take someone who is decent with car stuff about 45 minutes-1 hour to swap.
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      11-01-2006, 12:53 PM   #16
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Could one of you explain how much the Throttle Body costs in the end, minus labor, if you include the core exchange? Is it $399 + $325 =$725 then ends up being $399 in the end after exchange. Sorry if this is a stupid question, but I'm just a bit confused.
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      11-02-2006, 03:20 AM   #17
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Quote:
Originally Posted by Ghunger
Could one of you explain how much the Throttle Body costs in the end, minus labor, if you include the core exchange? Is it $399 + $325 =$725 then ends up being $399 in the end after exchange. Sorry if this is a stupid question, but I'm just a bit confused.
The core charge is refundable when you bring back the OEM throttle body.

Of course, if you have it installed by your local BMW dealership, there would be no core charge to begin with. So this means $399 + $120 = $519 + tax.
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      11-04-2006, 01:36 AM   #18
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Okay, thread updated. By this time next week, I'll have photos of the OEM throttle body for comparison. Install seems fairly straightforward, but would be nice to have warranty coverage.
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      11-04-2006, 01:59 AM   #19
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hmm im hoping to hear something good.
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      11-04-2006, 02:10 AM   #20
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i would be scared shitless to make that secondary intake duct... what exactly prevents leaves n' debri from entering that intake duct? is it just the filter?

n' i think you need to redyno after u install ur new items... then maybe make a new page on your progress mod after mod
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      11-04-2006, 02:17 AM   #21
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Quote:
Originally Posted by just4kickz
i would be scared shitless to make that secondary intake duct... what exactly prevents leaves n' debri from entering that intake duct? is it just the filter?

n' i think you need to redyno after u install ur new items... then maybe make a new page on your progress mod after mod
I hear you, and I have given the debris problem some thought. Well, big leaves wouldn't fit through the grille, but flies, and other small items certainly could flow upward. I was also thinking about using a HEPA filter that I would periodically change as well. I would like to look at an E46 M3 CSL setup.

As for the dyno, I do intend to do that again. I would think this should work synergistically with the intake + cold air. I guess we'll soon find out. I'm not expecting any tremendous gains, but I love the mechanical aesthetics of it all.

InXcel is right. This is somewhat of a token gesture of a mod if you want to call it one, but a small improvement is an improvement nonetheless.
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      11-04-2006, 12:44 PM   #22
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im hoping for the best, as i plan on doing this too
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