whitstella
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| posted on 13/9/12 at 05:12 PM |
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best throttle bodies
hi
just wondering what would be the best throttle bodies to use on a 2l zetec?????
cheers steve
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cliftyhanger
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| posted on 13/9/12 at 05:29 PM |
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Difficult to better Jenvey's. Though there are some barrel and spindlesless ones about too
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Fatgadget
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| posted on 13/9/12 at 05:40 PM |
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A throttle body is just an orifice to let air into an engine surely!
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cliftyhanger
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| posted on 13/9/12 at 05:48 PM |
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Yep. Some are better than others though. Generally find the cars that the top racers are using, you can't go far wrong by following the winners.
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monck
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| posted on 13/9/12 at 06:17 PM |
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i have a set of gsxr 750 srad tbs ( less commonly used) ..
Dale at bailey performance was very impressed said they where better than the normal bike tb's he had and he said i most likely wouldn't
notice any difference going jennevy ..
I used gsxr 750tbs a st manifold and injectors
And for the price difference that's good enough for me 
[Edited on 13/9/12 by monck]
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RK
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| posted on 14/9/12 at 12:24 AM |
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I know the square root of you know what about it, but you can get 600 or 750 GXSR TB's for hardly anything, including injectors. Just in case
you hadn't been looking. From the US, they are less than $100 often.
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jeffw
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| posted on 14/9/12 at 07:09 AM |
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Cheapest isn't. normally, the best. Roller throttle bodies must be pretty close to being the best followed by direct to head.
something like this http://atpowershop.co.uk/catalog/ford-zetec-throttle-bodies-assembly-direct-head-p-143.html
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BaileyPerformance
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| posted on 14/9/12 at 08:36 AM |
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quote:
Originally posted by jeffw
Cheapest isn't. normally, the best. Roller throttle bodies must be pretty close to being the best followed by direct to head.
something like this http://atpowershop.co.uk/catalog/ford-zetec-throttle-bodies-assembly-direct-head-p-143.html
We mapped a 1800 zetec (Omex) that had been fitted with these, bit of a pain to balance at first and the TPS mounting seemed poor. Customer reported
back that they kept going out of balance??
Stick to Jenvey, just buy the parallel set of the DCOE style versions (cheaper ones) as the tapered (individual) versions are better but much more
expensive.
The tempered version only makes a difference on a full race highly developed engine so in most cases is not worth the extra money.
Cheers Dale.
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jeffw
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| posted on 14/9/12 at 08:47 AM |
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The DCOE spacing is almost perfect for the Zetec so there is little gain to be had with the others.
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mtechmatt
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| posted on 14/9/12 at 09:24 AM |
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We usually use Jenvey, but have started using AT Power with some of our engine packages.
A full engine managemnt system and Jenvey TB setup from us is £1350+VAT. With basemaps. Expect 170bhp on a 2.0 Blacktop
Matt
V4 Engine Management System | Online Shop |
Rolling Road Tuning | Motorsport
Preparation | Engine Packages | Throttle
Bodies
Check out what's happening in the workshop via our Facebook Page:
The Workshop
MEGASQUIRT ROLLING ROAD & BIKE CARB TUNING SPECIALISTS
www.mtechautomotive.co.uk
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emwmarine
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| posted on 14/9/12 at 02:51 PM |
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quote:
Originally posted by RK
I know the square root of you know what about it, but you can get 600 or 750 GXSR TB's for hardly anything, including injectors. Just in case
you hadn't been looking. From the US, they are less than $100 often.
Great tip!!!!!!!
ebay in the US is so much cheaper for bike throttle bodies than ebay UK. Just bought a set of zx6r throttle bodies from a 5000 mile bike for peanuts
compared to here!!!! Many thanks.
Building a Dax Rush.
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monck
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| posted on 14/9/12 at 06:34 PM |
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Thats what i did my tb's where about £70 from the US , shipping and other taxes on top of that but still good ..
On a 2.0 blacktop i would recommend 750cc or 1000cc tbs the 600 cc tb's are cheaper as theres less demand i found but ill leave that to you to
decide ..
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BaileyPerformance
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| posted on 14/9/12 at 06:48 PM |
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quote:
Originally posted by monck
Thats what i did my tb's where about £70 from the US , shipping and other taxes on top of that but still good ..
On a 2.0 blacktop i would recommend 750cc or 1000cc tbs the 600 cc tb's are cheaper as theres less demand i found but ill leave that to you to
decide ..
A 2.0L Zetec must have at least 45mm bore throttle bodies, not sure what size the bike ones are? as you say the 750cc or 1000cc will prob be 45mm.
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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emwmarine
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| posted on 14/9/12 at 07:04 PM |
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quote:
Originally posted by BaileyPerformance
quote:
Originally posted by monck
Thats what i did my tb's where about £70 from the US , shipping and other taxes on top of that but still good ..
On a 2.0 blacktop i would recommend 750cc or 1000cc tbs the 600 cc tb's are cheaper as theres less demand i found but ill leave that to you to
decide ..
A 2.0L Zetec must have at least 45mm bore throttle bodies, not sure what size the bike ones are? as you say the 750cc or 1000cc will prob be 45mm.
oops. The zx6r has 38mm according to google. Although google also suggests that people have been using them for zetec blacktops successfully.
Building a Dax Rush.
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monck
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| posted on 14/9/12 at 07:55 PM |
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Sorry i was talking about Gsxr ones ..
Well not sure on that but mine are 44mm if i remember
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BaileyPerformance
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| posted on 14/9/12 at 08:18 PM |
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quote:
Originally posted by emwmarine
quote:
Originally posted by BaileyPerformance
quote:
Originally posted by monck
Thats what i did my tb's where about £70 from the US , shipping and other taxes on top of that but still good ..
On a 2.0 blacktop i would recommend 750cc or 1000cc tbs the 600 cc tb's are cheaper as theres less demand i found but ill leave that to you to
decide ..
A 2.0L Zetec must have at least 45mm bore throttle bodies, not sure what size the bike ones are? as you say the 750cc or 1000cc will prob be 45mm.
oops. The zx6r has 38mm according to google. Although google also suggests that people have been using them for zetec blacktops successfully.
I'm sure smaller throttle bodies would work, but power will be down. It always been known 2.0L ford engine requires 45mm, a good well tuned
Pinto will make use of 48's, a cosworth YB NA will benefit from 50's if the engine is built for high RPM.
I think bike throttle bodies are not the way to go, pukka Jenveys are not that expensive when you consider the messing about involved making a (poor)
manifold for use with bike bodies.
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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monck
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| posted on 14/9/12 at 08:24 PM |
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Seems Dale has cleared it up ...
Although i was happy with the result i got and unless they give me any grief ill stick with them ..
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mtechmatt
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| posted on 15/9/12 at 09:45 AM |
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quote:
Originally posted by BaileyPerformance
quote:
Originally posted by monck
Thats what i did my tb's where about £70 from the US , shipping and other taxes on top of that but still good ..
On a 2.0 blacktop i would recommend 750cc or 1000cc tbs the 600 cc tb's are cheaper as theres less demand i found but ill leave that to you to
decide ..
A 2.0L Zetec must have at least 45mm bore throttle bodies, not sure what size the bike ones are? as you say the 750cc or 1000cc will prob be 45mm.
Dale,
Cant really agree with this, I have had 167bhp on 38s...
That was on CV type bike carbs (not injection)...
The ports are smaller than 45mm...
Just my opinion
Matt
V4 Engine Management System | Online Shop |
Rolling Road Tuning | Motorsport
Preparation | Engine Packages | Throttle
Bodies
Check out what's happening in the workshop via our Facebook Page:
The Workshop
MEGASQUIRT ROLLING ROAD & BIKE CARB TUNING SPECIALISTS
www.mtechautomotive.co.uk
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cliftyhanger
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| posted on 15/9/12 at 10:10 AM |
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Don't carbs work very differently to TB's?
I thought carb size was way more important on carbs, too large being very detrimental. But tb's can tune it out (largely)
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mtechmatt
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| posted on 15/9/12 at 10:24 AM |
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They do,m well CV ones do anyway, but the bore size ultimately determines air flow maxima, and thefore power. Overlly large TBs are no benfit. Indeed
we always fit 45mm Jenveys to most 2.0Ls anyway, just an insteresting side note from me that power wise, down to 38s I have seen no overall loss...
Matt
V4 Engine Management System | Online Shop |
Rolling Road Tuning | Motorsport
Preparation | Engine Packages | Throttle
Bodies
Check out what's happening in the workshop via our Facebook Page:
The Workshop
MEGASQUIRT ROLLING ROAD & BIKE CARB TUNING SPECIALISTS
www.mtechautomotive.co.uk
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will121
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| posted on 15/9/12 at 01:06 PM |
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I did have gsxr 600 throttle bodies with standard zetec ecu and ran fine at 150 bhp now have gsxr750 ones fitted with a home made manifold total cost
me £100. Now Running with emerald ecu when mapped dave walker did say didn't really like bike bodies but he mapped it all fine and easy with no
issues at all, I will admit proper bodies will no doubt be better and possibly more power with better air flow but cost 6 times as much or the the
price of a set of performance cams!
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jeffw
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| posted on 15/9/12 at 02:05 PM |
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There will be very little difference on WOT between any of the types of throttle body (Bike/Jenvey/ATPower etc) the difference comes on part throttle,
especially just off idle.
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loggyboy
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| posted on 15/9/12 at 02:25 PM |
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The Weber Alpha kits look good, despite the lack of personal customisation (needs to be dealer tuned for anything other than a standard lump).
I picked mine up cheap and yet to run them due to lack of overal build progress, but the pack is very comprehensive and apart from a fuel pump, I
shouldnt need to buy anything else at all.
Its premapped for a standard lump, so apart from being balanced up which anyone can do pretty much it should see 170hp out the box
Mistral Motorsport
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BaileyPerformance
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| posted on 16/9/12 at 04:51 PM |
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quote:
Originally posted by mtechmatt
quote:
Originally posted by BaileyPerformance
quote:
Originally posted by monck
Thats what i did my tb's where about £70 from the US , shipping and other taxes on top of that but still good ..
On a 2.0 blacktop i would recommend 750cc or 1000cc tbs the 600 cc tb's are cheaper as theres less demand i found but ill leave that to you to
decide ..
A 2.0L Zetec must have at least 45mm bore throttle bodies, not sure what size the bike ones are? as you say the 750cc or 1000cc will prob be 45mm.
Dale,
Cant really agree with this, I have had 167bhp on 38s...
That was on CV type bike carbs (not injection)...
The ports are smaller than 45mm...
Just my opinion
Matt
Hi Matt,
The zetec inlet ports are not massive, but overall size is close to the flow rate of a 45mm throttle (oval shaped port, about 22mm each valve
inlet)
On jenvey 45s you should see no less than 170BHP (we have seen 177BHP) on an otherwise stock blacktop, 190BHP with cams. A decent exhaust manifold and
system makes a big difference too.
It would be interesting to do a back to back with 40's verses 45's, but as there is no disadvantage to using 45's on a 2.0L there
seems little point in using 40's. On a 1.6 or 1.8 40's mite be better due to better throttle response (air speed would drop with
45's i suspect)
We have seen recently a slight drop in power when we converted a redtop from weber 45's to megasquirt and direct to head jenvey's. Better
throttle response with the jenvey's but we lost 5BHP top end. We put this down to the position of the injectors - we know from previous dyno
testing most engines respond better if the injectors are further down the inlet tract, and often mounted under the throttle bodies (upside down) also
helps power. With the carbs the fuel in introduced to the air stream roughly in the center of the carb body, unlike the jenveys we used that had the
injectors in "factory" locations very close to the engine.
Dale.
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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jeffw
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| posted on 16/9/12 at 05:45 PM |
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Interesting stuff. Was that 5BHP loss across the board or just at peak?
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