Gregs79 Posted March 27, 2015 Share Posted March 27, 2015 A question for those of you with one of the above.Why did you go for the type you have? Caterham offer Roller Barrels, but a lot of others are offering Direct to Head!Let the debate begin! ;-) Link to comment Share on other sites More sharing options...
Area Representative Paul Richards Posted March 27, 2015 Area Representative Share Posted March 27, 2015 And I thought roller barrels were direct to head throttle bodies. Link to comment Share on other sites More sharing options...
TomB Posted March 27, 2015 Share Posted March 27, 2015 I thought the main point of the RBTB was that there was no butterfly to interfere with airflow, thus maximising performance, but with a reputation for poorer driving manners at part throttle. Link to comment Share on other sites More sharing options...
Gary Stone Posted March 27, 2015 Share Posted March 27, 2015 As TomB says. Throttle bodies have a butterfly in the middle.Roller barrels do not. Good for full throttle but not so good for normal driving. Link to comment Share on other sites More sharing options...
solstice Posted March 27, 2015 Share Posted March 27, 2015 Guys, a slight deviation, would throttle bodies give more bonnet clearance than a VVC inlet manifold? I've had to cant the engine over to fit the VVC manifold which compromises sump clearance. Throttle bodies might be a solution.ThanksGareth Link to comment Share on other sites More sharing options...
oilyhands Posted March 27, 2015 Share Posted March 27, 2015 TBs give more clearance than a VVC plenum.Oily Link to comment Share on other sites More sharing options...
Mankee Posted March 27, 2015 Share Posted March 27, 2015 I went with Jenvey DTHs simply because they came with my car. I personally don't think rollers are worth the extra expense. I do want to go from 42mm to 45mm bodies though. Link to comment Share on other sites More sharing options...
Gregs79 Posted March 27, 2015 Author Share Posted March 27, 2015 Thanks for the feedback. Most of my time will be spent on the road so I am looking for driveablilty! I think it will be the Jenvey DTHs route for me. Link to comment Share on other sites More sharing options...
oilyhands Posted March 28, 2015 Share Posted March 28, 2015 Mankee, the 42s have shown to be good for over 240BHP so I don't really know what you would gain other than a void where your wallet used to be :).Oily Link to comment Share on other sites More sharing options...
John Vine Posted March 28, 2015 Share Posted March 28, 2015 IME, RBs do not necessarily mean poor low-speed driveability. My old SS-R has RBs as does my current R400D, and both cars drive smoothly and without snatch at low engine speeds. I think the secret of good road manners lies in getting the RBs set up and balanced correctly. But I couldn't say whether this needs to be done more frequently than with, say, Jenveys.JV Link to comment Share on other sites More sharing options...
Mankee Posted March 28, 2015 Share Posted March 28, 2015 Hi Dave. I know you're right; I should be happy with 240bhp, especially as that last few bhp is just for pub bragging rights and will cost me an absolute fortune. Nice fat mid-range is what I should be after. For the time being though, 200bhp/160lbft is still enough to give me a fright, so engine work will wait until it blows up. Link to comment Share on other sites More sharing options...
21jigsaw Posted March 28, 2015 Share Posted March 28, 2015 http://www.lotus7.club/comment/2099472#comment-2099472 Link to comment Share on other sites More sharing options...
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