CJBear

Just looking at Burton Power website for some bits and came across Titan roller barrel throttle bodies, how different from the usual throttle bodies listed like Omex and Weber?

_DAN_

They use rolllers don't they instead of the usual spindles?

CJBear

so which one is better than the other

Fudgey

iTrader: (4)

ive got a set of the titan r/b's

basically they offer smoother response and at full chat have no restrictions at all

CJBear

Keith B

What application were they for? Zetec?

richard_syko

Only better than butterfly at WOT

Keith B

I think alot of us here drive with WOT quite alot LOL!

Wardy257

The can stick at WOT too, not worth the extra cash unless you race for a living.

neilm

Eh ?

Who says they stick at Wide Open Throttle ?


Rather strange comments on a forum where everyone is looking for more power and they are about 15-20% more than the equivilant Weber Carbs or Throttle Bodies.

Not a big price to pay for more power, more torque and a lovely induction roar.


The extra airflow is like running an increased size, so say you had a 40mm carb or throttle body, because of the spindle and butterfly they are restricted to only flowing the same amount of air as say a 36-37mm open tube.

So a 40mm Roller Barrell is like a 43mm Carb/TB and a 45mm Roller Barrell is like a 48mm Carb or TB.


Titan do two sets, they do the direct to head RB's for Duratec or the Full Roller Barrell which is designed to go wherever a DCOE type carb will go as they have the same foot print so no need to change the inlet manifold.

Keith B

So can you get a set for a CVH then?

neilm

Yes mate, if you can get a pair of 40's on there then you can get the roller barrells in there.

The only downside is you have to run filters because Titan do the sexiest trumpets money can buy....


Talk to Troy at Northampton Motorsport as they are a reseller, he can give you some info how they compare to traditional throttle bodies on their rollers.

They did a pair on a Focus recently and I think the results were very good and the noise quite addictive

Wardy257

The effects of the airflow through the TB at WOT can make them stick.

An engine will only use as much air as it needs regardless of how it gets it.

A 43mm Carb is more like a 36mm TB to.

As long as the size of the TB is matched to your expected engine power (along with your injector size) your torque and bhp is dependent on the mapping. If your TBs are too big you can lose low down torque, gaining bhp.

BHP sells cars (and makes Chavs happy) and torque wins races.

Keith B

Oooooooooooooh! Handbags at dawn there!

CJBear

only wondered what the diff was

my common sense tells me why not just buy 45mm throttle bodies instead of a 40mm roller barrell surely they would perform the same plus save a few pennies

neilm

A 43mm carb is like a 36mm Throttle Body ?

I'll have what you are smokin as its obviously strong shit...


A 40mm throttle body will flow the same amount of air, with the same characteristics in flow as a 40mm carb.

The only difference between the two is how the fuel is mixed with the air and throttle bodies produce more power because the fuel is sprayed into the path of the air by an injector, it isnt drawn into the air stream by the flow of air as it is with a carb. Hence injected cars drive nicer at low revs than a car with a pair of 40's or 45's fitted

This aids with atomisation, which helps drivability at lower speeds when typically air speed through a carb is slow and the fuel drops out of the air fuel mix.


As for Roller Barrells they give a much smoother flow of the air/fuel mix when the throttle is held open as there it nothing to interupt the air flow therefore the can flow to the full potential of the 40mm tube.


This 'technology' has been used for ages, albeit on race cars with things like Slide Injection from days of the Lotus Twin Cam and BDA back in the very early 70's

However back then it was purely for race application becauce the ignition side of things wasnt matched with the fuel delivery so it all worked very well on full chat but lower down the rev range with only a small amount of throttle it didnt work so well.

However with modern management all those issues can be mapped out and Roller Barrells, along with Slide Injection can be set up to work very well on road cars.



Sticking throttle ? With the correct springing in the Roller Barrells this isnt an issue and the return springs are enough to overcome the pressure created by the air flowing at full throttle.

Sticking is more likely to occur if they have been used without filtration and particals of dust have coated the central barrell causing it to stick.

Wardy257

What? Are you ignoring the chokes and aux venturis etc?

Read this:

http://www.emeraldm3d.com/em_projects_carbs.html

Do think better jets would have seen this amount of gain?

TBs flow more air per mm than carbs, that is a fact.