Englishmaninwales Posted May 7, 2009 Share Posted May 7, 2009 What size Jenvey DTH is best for VHPD engines. The Jenvey website suggests 45 mm, what 's the experience amongst blatchatters? Malcolm Link to comment Share on other sites More sharing options...
John Howe Posted May 7, 2009 Share Posted May 7, 2009 45's JH Deliveries by Saffron, the yellow 230bhp Sausage delivery machine Link to comment Share on other sites More sharing options...
taffyracer Posted May 7, 2009 Share Posted May 7, 2009 I believe that 42mm were good for upto 250bhp, Link to comment Share on other sites More sharing options...
rj Posted May 7, 2009 Share Posted May 7, 2009 45's have recently been introduced. I have 42's on my car, and those are the most common. Unless your engine is extreme these will do. For my next generation engine... 😬 Link to comment Share on other sites More sharing options...
Englishmaninwales Posted May 7, 2009 Author Share Posted May 7, 2009 *thumbup*Thanks Link to comment Share on other sites More sharing options...
Rob Walker Posted May 8, 2009 Share Posted May 8, 2009 The 45`s need much less fettling to match to the ports and can flow more air. Link to comment Share on other sites More sharing options...
Englishmaninwales Posted May 8, 2009 Author Share Posted May 8, 2009 Thanks Rob. Malcolm Link to comment Share on other sites More sharing options...
Jason Plato Posted May 8, 2009 Share Posted May 8, 2009 are these new 45mm versions the ones that dont have sufficient clearance to fit a backplate and filter as the top diagonal gets in the way ? here is my Duratec R .... C7 TOP Taffia joint AO with Al Link to comment Share on other sites More sharing options...
rj Posted May 8, 2009 Share Posted May 8, 2009 Dave, I hope not 'cos then I'll soon get in trouble... Link to comment Share on other sites More sharing options...
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