DCOE VS Throttle Body DCOE VS Adapted Bike Throttle Bodies

Ok.. I know this is a bit of a rehash..

But generally, not rally specific. What would you prefer and why?

The way I see it:

Weber DCOEs

+ Generally agreed to be the best carburator out there
+ No Electronics
- It's a carburator.. they are finicky by nature.. sure you can get it good enough
- They're not exactly cheap, and all the tuning bits and bobs aren't free!

Throttle Bodies with DCOE pattern:

+ Least amount of f'in about for good fuel injection
- Expensive as F

Adapted Bike Throttle Bodies

+ Cheapest way to get ITBS that I know of
- The most f'in about

Am I missing something?


Does anyone know of a Cheap supplier for DCOE patterned ITBs? They're pretty flipping simple to make.. there's obviously a LOT of mark up in TWMs price. I know of Jenvey and Extrudabody.

Cheers,

Andrew

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Andrew M
Onterrible
30ish

I guess I left out where I'm leaning.. I implied it though.

I think that the DCOE style ITBs are the best choice.. because I really don't think you can make an argument for carburation in the over all picture.. it's simply not as good as a properly setup and tuned fuel injection system period. It's simpler, sure, but that's about it. I lean towards them because if you're a hawk on Ebay you can snag a pair for $400 - 600 bucks. The all in costs are more? Not quite sure.. I guess it depends on how quickly you zero in on your tune and if you need to do a complete over haul of the carbs. At any rate, one day I imagine I'll take em off to go to fuel injection anyways.

The reason I'm against rigging up bike ITBs is that no matter what it's going to take a fair chunk of time.. and time is a hot commodity. Sure I haven't set them up, but it's gotta take a wack of time and if you factor your time at say 10 bucks an hour.. they'll probably be more $$, time factored in than the "bolt on" solution.

What do you guys think?

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Andrew M
Onterrible
30ish

Tweakit in Australia.

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Grant Hughes

hudson Wrote:
-------------------------------------------------------
> At any rate, one day I imagine I'll take
> em off to go to fuel injection anyways.

In the preceeding paragraph, you are talking mostly about DCOE-pattern ITBs. I hope you understand that "throttle bodies" are a subcomponent of a fuel injection system. You install throttle bodies at the same time as EFI (unless you already have EFI).
Maybe I'm just getting confused with all the pronouns.

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Monika Hawkinson
Seattle, WA



Edited 1 time(s). Last edit at 04/15/2009 08:40PM by Sofa King.

Sofa King Wrote:
-------------------------------------------------------
> In the preceeding paragraph, you are talking
> mostly about DCOE-pattern ITBs. I hope you
> understand that "throttle bodies" are a
> subcomponent of a fuel injection system. You
> install throttle bodies at the same time as EFI
> (unless you already have EFI).
> Maybe I'm just getting confused with all the
> pronouns.

Yeah, I didn't really get my point across well. I understand the difference.

1960s 4 banger. Stock pretty crappy carb setup.

I guess, my basic question is.. what's the best upgrade given there's, like every other engine, DCOE intake manifolds.

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Andrew M
Onterrible
30ish

NoCoast Wrote:
-------------------------------------------------------
> Tweakit in Australia.
>
> Grant Hughes
> www.nocoastmotorsports.net
> Denver, CO


That doesn't seem to be a bargain.

This extrudabody kit has 1/3 more than I need.

http://cgi.ebay.com/ebaymotors/Weber-DCOE-IDF-45mm-1-75-Throttle-Bodies-Replacement_W0QQitemZ160328611363QQcmdZViewItemQQptZMotors_Car_Truck_Parts_Accessories?hash=item160328611363&_trksid=p4506.c0.m245&_trkparms=72%3A1171%7C65%3A12%7C39%3A1%7C240%3A1318

Seems to be similarily priced (it's 3 x 45 ITB DCOE pattern for 1.4k c/w manifold and etc).

It doesn't look as high performance.. but it also doesn't require fab.

Maybe I'm missing something?

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Andrew M
Onterrible
30ish

I have seen bmw guys use GSXR 1000 trottle bodies when they are going megasquirt. If your on a budget you can do a search on www.2002faq.com or the E30 forums.

I worked on a sand rail last year with a pro-built 2.3 Ford. It had 4 Mikunis off of some bike. They were mounted with rubber hose to a home made intake, stub pipes on a flange. Started easily and ran like a scalded dog.

Well - I think you have the pro's and con's up there pretty good, so it's mostly up to you to figure out which of the reasons that are more important to YOU.

I would add one extra con though: Bike TB's mounted with rubber hose to stubs on manifold, are not the most flow friendly thing in the world. You need to get it JUST right.

For me, DCOE TB's aren't worth the cost - but then: I'm a cheap bastard.
I haven't gone any of those routes though - I have a set of Toyota Corolla 20V TB's on my Golf. They are flange mounted, so I had to fab up a manifold - big hassle... but that was just about the tinkering and mucking about that I had with it.

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Brgrds
Brian





Edited 1 time(s). Last edit at 04/16/2009 12:57AM by wildert.

I seem to remember a discussion on a different forum on adapting motorcycle intake to automotive.

Not 100% sure but I think the discussion involved Charlie North from First Function Motorsport.

Perhaps give him a shout, he seems very knowledgable :

http://www.ffmsd.com/

heymagic Wrote:
-------------------------------------------------------
> I worked on a sand rail last year with a pro-built
> 2.3 Ford. It had 4 Mikunis off of some bike. They
> were mounted with rubber hose to a home made
> intake, stub pipes on a flange. Started easily and
> ran like a scalded dog.

That's the Esslinger Racing Mikuni set-up. The Mikunis are off some snowmobile application. http://www.esslingeracing.com/catalog/page16.pdf

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www.performanceoptions.net

Those flatslide bike carbs arnt going to be any cheaper than a set of webers.

OK I'm right at this point on Ian Topping's Volvo Group2 project and this seems to be a pretty good deal:
Twin Bodies DCOE short 30mm REF.
PRICE
Twin body 40mm STB40 360€


Twin body 45mm STB45 360€
Twin body 48mm STB48 360€

Twin body pair 40mm STB40P 645€
Twin body pair 45mm STB45P 645€
Twin body pair 48mm STB48P 645€
Twin body pair 50mm STB50P 660€
Twin Bodies DCOE long 91mm REF. PRICE
Twin body 40/42/45/48mm THS? 375€
Twin body 50/52/55mm THS? 395€

Twin body pair 40/42/45/48mm THP? 675€
Twin body pair 50/52/55mm THP? 715€

That's all with DCOE bodies.
If you can divorce yourself from DCOE then there are modular single bodies for starting at 120 Euro

Chadil.be

Twin Bodies DCOE long 118mm REF. PRICE
Twin body 40/42/45mm TBS? 375€
Twin body 48/50mm TBS? 395€

Twin body pair 40/42/45mm TBP? 675€
Twin body pair 48/50mm TBP? 715€

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John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.

I got a set of GSXR 750 bike throttle bodies, the round style that's held on by the hoses. I got them for something like 65 bucks plus shipping and am still halfway planning on using them. It all depends on how ambitious I want to get on making a manifold, as my ports are pill shaped, and the throttle bodies are round... However, with the ECM I've got, its easy to hook them up, efi wise.

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Welcome to the cult of JVL drink the koolaid or be banned.

It looks like they are reselling Jenveys.

www.jenvey.com

They work out cheaper to Canada anyways.

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Andrew M
Onterrible
30ish