Versus_Creations

iTrader: (1)

Is there such an item?

I know the obvious one like the Mountune 4 Port barrel plenum



But is there any type of throttle body that has no butterfly that can be used with a single port manifold/plenum??

How about a Zetec head with barrel plenum?

Any info would be great

Ryan

Jano there was a WRC Zetec inlet on Ebay last week

didnt sell, but was @ £1500

Think Jamsport have one going on there blue Escort aswell

Versus_Creations

iTrader: (1)

any links for the one on ebay?

Ryan

didnt save the link have a quick search on there and cant find it.

obviously hasnt been relisted.

sorry

GARETH T

i wouldnt bother wasteing you money on a roller barrel throttle,,,, ive read a few reports and thet all say that the throttle plate becomes invisible at high flow rates (aslong as the body is big enough)

Versus_Creations

iTrader: (1)

IMO A butterfly that is in the middle of a Throttle body will cause restrictions and disturb the air flow charateristics. Regardless of the size of the throttle body.

Even @ full throttle there is not a 100% open port with butterfly.

With roller barrel you will have 100% air flow, if it is a decent design manifold the air flow will be alot more effective. Obviously raising the amount of air a manifold/throttle body can supply.

GARETH T,
What reports have you been reading? Any links?

ian sibbert

http://cgi.ebay.co.uk/ws/eBayISAPI.d...MEWA%3AIT&rd=1

That's the inlet manifold off e-bay...

Regards

Ian

big_wig_074

you could profile the butterfly to a point at either end to reduce the restriction,i know someone who did this,but he was hell bent on just doing things because he could,but the theory is sound!

Ryan

Cheers Ian, thought you might have been watching that

essexrsturbo

that plenums the daddy

Versus_Creations

iTrader: (1)

Thanks Ian,

I have worked on the type of maifold on ebay before, if it is the same as the one i have seen, it is not a roller barrel type and has four butterfly's controled by one shaft. This creates even flow to each cylinder. But still has a restriction/distrubance at full throttle (very low tho due to design)

Regards

Combi_Chris

jano , can you ring me ? i cant get through cos all the mobile networks are dead

01279320657

ian sibbert

Jano,

I thought the Focus WRC still retained the butterfly....

I seem to remember seeing an auto cross or grasstrack car never took a lot of notice but it had a XE engine and some form of single almost ball valve type throttle arrangement.....your theory has creadance we monitor fluid and air flow and using a full bore ball valve compared to a butterfly or seat and plug does make massive difference, can't just find any data that would support it, are you looking at a single body say 80mm feeding 4 cylinders?

Regards

Ian

GARETH T

im sure dave walker ( ) is the people who wrote the stuff i have read,,, just cant remember where!

the only production engine i know of which runs roller barrel throttles is the minister built caterham (and i think they are using the same inlet on there zetec cosworths) and thats it! i always look at the top, ferrari dont use it,,, mclaren dont use it, gareth dont use it

Versus_Creations

iTrader: (1)

It does This is what i said about the WRC one on ebay:-
Maybe not that big, as the air required (at a guess) would not be needed to have a throttle/barrel that big.

What i imagine is 4 equal ports, direct to the head, leading from one main larger port with a single barrel. (If you were to look into the port through the barrel you would see four circules where the ports would join each other to look like a four leaf clover) Nothing over the top just simple and equal with the least amount of bends.

Regards
Jano


GARETH T,

No offence but a Ferrari or Mclaren is not anything like a Ford

IMO you should base your comparison on a better example Maybe a WRC Cos which uses roller plenum

Versus_Creations

iTrader: (1)

OMG is that the time check for spelling quick

ian sibbert

Never tried a barrel throttle myself, but I know of at least 1 guy (kevin Procter) who runs a Puma 4 x 4 using esc cos WRC running gear and engine who has tried both a barrel throttle body and went back to a conventional butterfly type siting throttle reponse with the ALS turned on as the reason....never had an indepth conversation about the why's with him yet!! I like the idea and I if I was desgning a system incorporating a barrel i'd go for multiples rather than 1 large body...it may be the resitance offered by a barrel(s) that prevents smooth throttle response and that's why people have tested then rejected these types of throttles....this aint a new idea we played with slide injection on N/A engines with a major degree of sucess a long time ago.

Versus_Creations

iTrader: (1)

I have also used the slide type manifolds before. Like you say it is nothing new. But used in different places and situations could benifit some of the work i do.

Thanks for your replies
Regards
Jano

GARETH T

an engine is an engine,,, be it making 10hp or 1000 hp,,, the big boys i talked about have even bigger budgets i think i know who too be lead by

havent ford now binned the barrel inlet on the focus??