fentuz Posted January 11, 2014 Share Posted January 11, 2014 From memory, the vhpds were fitted with the titan kit. Caterham is still using them on their ford powered cars. What are the pros and cons? Cheers Bill Link to comment Share on other sites More sharing options...
John FISH Curtis Posted January 11, 2014 Share Posted January 11, 2014 I believe the roller barrel's are more unreliable, in sure Dave Andrews mentions it. I've had Jenvey DTH TB's fitted to a K before with great success. Link to comment Share on other sites More sharing options...
Martin R Posted January 11, 2014 Share Posted January 11, 2014 Titans, on the S1 Exige and 340R can be a bit temperamental. I have heard tales of them sticking open. The Jenveys on the S2 Sport 190,s have a better reliability record apparently.. Link to comment Share on other sites More sharing options...
chorton_1 Posted January 14, 2014 Share Posted January 14, 2014 I have Titan barrels, but Duratec fitment, on my Elise. Pros of barrels *) Better performance (no interruption of airflow at all, but the gains against well designed butterflies are small) *) More linear opening / torque response with pedal movement (barrels allow a small air gap, slowly getting bigger with rotation whereas butterflies open more on the circumference first, allowing a lot more air in with smaller rotation). This effect can be altered with the throttle linkage geometry, especially if there is a cam in the system. Cons of barrels *) The whole barrel rotates in the housing. Therefore the surface area of the 'sliding' surfaces is far greater, and it's away from the pivot access. The upshot is that they are a lot more susceptible to getting sticky with dirt ingress. In comparison butterflies have a small spindle, well shrouded from dirt. *) Barrels can suffer from fuel pooling behind the barrel, that can suddenly be ingested when opening to fuel throttle. This can cause a hesitation on rapid throttle opening. Calibration can reduce this to an extent. *) Barrels are usually more expensive It is often mentioned that road cars, with higher dirt and less servicing, are well served with butterflies. Race cars are usually barrels. My barrels have been on for 8 years and are only just being stripped, and have been fine. Titan have now launched a range of butterfly throttles to compliment their barrels. Link to comment Share on other sites More sharing options...
fentuz Posted January 14, 2014 Author Share Posted January 14, 2014 eliseparts has a few for sale hence the question. Link to comment Share on other sites More sharing options...
chorton_1 Posted January 14, 2014 Share Posted January 14, 2014 Well I definitely have no complaints about the Titan barrels on mine - they've worked well. Link to comment Share on other sites More sharing options...
KurtB Posted January 26, 2014 Share Posted January 26, 2014 I replaced my Titans with Jenveys. Titans stuck at wide open throttle twice on separate track days. That made for an interesting time! Link to comment Share on other sites More sharing options...
Steve J Posted January 26, 2014 Share Posted January 26, 2014 Mine stuck when owned by Brendan. Dealer sorted and no problems after though not got the vhpd anymore. Link to comment Share on other sites More sharing options...
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