i have a set of jenvey tb is it worth putting them on a zetec turbo and having a manifold made to fit, ive already got a area 6 8injector manifold, i was just wandering if anyone has had experiance with this and if it would make alot of difference and wat trumpet size to use ?

 

cant say iv heard of this

 

i think martin at reyland uses throttle bodies on his escort cossie he may be the man to ring and i mean ring as he will not answer emails or pm usually lol!

 

Are they single throttle bodies or the twin ones , they will offer better mid range response , but ive heard that they can be a little tricky to set up and map , plus £1000 just for a little extra response was a little to expensive . If you cut the area six inlet up then design it so you can have adjustable lenght runners as this is the area in which the zetec responses too very well, the longer the better and longer = higher torque

cheers paul

 

not really higher torque, it just moves the power band to the left.

 

You cannot use them. The TB used on turbochargred applications are a lot stronger. Any decent level of boost will damage the butterfly's and shaft's.

John

 

will gallops rallycross zetec turbo engine produced around 50 ftlbs more than his old inlet and he told me the only mod was making the inlet runners longer , to around 10 ", austen w helped with the jenvey turbo plenum and did a lot of dyno testing of different lenght runners and they found that 16 " in lenght where the optimun at 15.5 degrees if i remember right , of course the only problem is fitting them in your engine bay

cheers paul

 

does it matter if its single throttle bodies or the twin ones? i have been offered a cheap set
of my mate and are they harder to map ive got quite abit of space for longer trumpets aswell

 

I find it very hard to agree with that

Mark

 

yes it does matter as jenvey do 2 different types of tb , the ones you need are the single tb as ian uses the jenvey inlet section that these bolt to , i think its called the sf range then theres a different inlet section for the twin setup.

cheers paul

 

Lee from Devil Devlopments is the man for zetec turbos give him a buzz.

 

so would the twin ones be no good ?

 

not really got any decent pics of mine

but here you go



not sure with what difference they made as i had a lod of stuff done all at once. so cant tell how they work on their own

mine are the twin ones, i know tommy and jenvey discussed which would be best suited for my engine (within my budget also lol)

 

hi mate yes twin would be fine , but you would need to buy the twin tb lower inlet manifold section to fit them and i dont know if the twin setup would have exactly the same inlet width so you might need to redesign the inlet box so basically a brand new inlet.
the twin range is called tb

hes a picture of the lower inlet section totally different mountings for the tb version



and heres a picture of the twin set up notice the the bolt holes



here are the sf range of tb that use a single tb for each port , notice the flat plate with the 4 bolt hole pattern , now this is what ian uses on his zetec turbo inlet manifolds .



here are the single tb which also have the flat plate with the 4 bolt pattern.



now as long as the twin tb are the same width etc which i guess they would be then you can either cut your inlet off at the box section and buy a new tb version inlet section and simple bolt it on with slight mods to mount it to the box section or you could weld it up ( which i would not reccomend) incase one ever breaks etc as you would need to cut everything up again.

i would buy the new inlet section which is a bolt up jobbie for around £200+vat then get a the inlet manifold face machined flat where you have cut the tubes off your existing manifold then simply drill and tap to match you twin throttle bodies
and job done , my only concern would be if your running high boost (30psi +)then i would not use gaskets i would have everything o ring which jenvey charged me £50 for 4 and you you would need 8 , so you can see where the cost start added up quickly


hope this helps mate

cheers paul