Hi all I know this has been on before but it never gets any straight answers. I been looking at loads of different manifold because am wanting a new manifold as my now I can see it's not flowing as well as i would like. The main thing I'm look for is best flow and volume. What's people's thoughts on side feed to central feed?

 

Made a few changes to my engine this year.
Inlet manifold was one of them, it's must certainly work better as making similar power to before with a lot less boost

So a lot is to be said for free flowing and making everything work well together

Now using a mountune roller barrel set up that's been butchered to suit my jenveys

I would give crazy cage a shout. His inlets look like they are well up to the job

 

Must have some money you like Gus ha. I've spoken to Gary and he's never done a cvh one piece manifold but has done some that sit on the efi bottom witch I have atm. Got any sneaky pictures gus?

 

If you mean centre feed like an EFi manifold then that's a very poor design.
A nice bespoke manifold will always flow in from the side, the less bends from turbo to manifold the better and of course the internal design of the manifold makes a huge difference too.

 

Only one I got at the mo

 

I could make one but it wouldn't be a cheap inlet

 

Something like Christian's old side fed plenum...

https://www.gumtree.com/p/cars-vans-...num/1161926592

P.S. Sorry about the name... VERY old account!!

 

Yes similar to that

 

Wow looking good that mate looks big will it hit the bulkhead?

 

Gary will that style of inlet flow similar to what I have now? I want better flow and don't know if this style will be the answer.

This is what I have atm only thing is there's no trumpets in mine.

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And this is why I want to change it. Looks like the air flow is going in and straight to number one cylinder witch is what I was told happens when fitting a Swedish inlet on a cosworth number 4 runs lean.

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If it does the bulkhead will be gentle massaged with a big hammer


It's very similar in size to my old inlet

It's the throttle bodies that push it away from head

 

Gus looks really something special that looks like the best of everything. I've seen your car on here for years but never seen it for real. How long before its on?

 

on?

in the car?

cars having top to bottom resto. a lot of things changing fo the better
a lot Is done now so its all the details now so hopefully not too long now

 

You should make a restoration on it would be good to see something different with good ideas

 

New engine eh, Gus? Still sticking with a CVH? Be good to see what comes of this, the last one was mental enough.
I'm not sure what way to go with my next engine. I love the idea of putting a CVH back in mine but a mad spec CVH is out of my budget!

 

Not new just improved apon

I did start a resto thread on s1 site just never remember to update it
So it's more like a before and after

 

Get it up on here too mate👍

 

Jenvey inlet on jenvey inlet plate or area six cvh inlet , looks like the zetec one

 

The only area six Cvh inlet I've seen is just a plenum on top of the fiesta efi lower half

 

I've never seen one

 

Stndard inlet albeit ported to the head will do 350 bhp all day long.

I persoanlly like center feed, the old turbo ford inlets were good design. Im just increasing the size of the plenum chamber on mine and using efi bottoms. cossie throttle body up top and thats hopefully enough for 400 bhp.

What power will the new spec engine be Gus ?

 

Same power as before just with half bar less boost

So im happy with that

 

Is nms making your manifold? I know they use ported s1 manifolds and get good results but is this what they use to see 400bhp?

 

Sid had one on his zvh engine , doesn't look like it had the lower half of the cvh inlet as it sits very low in his engine bay , could be a custom made one.
Saying a ported inlet will be as good as a well fabricated one or the jenvey inlet is just not correct. Ford is designed as a mass produced engineered part and not a high end Motorsport part that can handle these sorts of figures people are chasing etc .
Gus has the correct idea in terms of tuning yes my parts are good enough for 400 bhp @30psi but if I uprate certain parts on my build I may be able to get 400 bhp @25/27psi making a more reliable engine all round , now not everyone can afford the parts or not everyone wants to spend on the parts but this silly sigma around oh we can use shitty cvh original parts ported is just silly compared to proper engineered parts designed to do the job better.

Lots of people can make them , choice is yours really

Cheers paul

 

Didn't Christian Major run a modified MFI CVH inlet at one point? No idea if it's any good or not, but I'm sure I remember it!

 

Mr c was the same

Always said that the stock inlet was good enough and could do the numbers

Til he changed

 

Everyone says that till they change same with the exhaust manifold

 

Sorry, I didn't explain myself very well there. I meant I'm sure he ran the inlet from an NA MFI CVH at one point, the XR3i/Orion 1.6i one.

 

Without a whole lot of fabrication yes, but a centre feed manifold will always distribute the air better than a side feed. Almost all side feeds that don't use an additional plenum to mimicking a centre feed have to restrict the air to get the airflow correct, most do this incorrectly as the OP has found out

 

Which manifold are you referring to? Both the MFi and EFI are a centre fed manifold unless I am missing something .


Always an interesting topic.

Here is one for you? If you were running around 220-240BHP would you bother about what manifold you have or just leave it? So far, my ZVH has an MFI manifold and is making 230BHP & 18PSi. IIRC it's running a Piper 285T cam and a Stage 3 head believe to be of PE origin.

 

Guess it all depends on how much you wanna spend


Personally I think if everything is working as efficiently as possible then that can only be a good thing


So why not

 

There would be gains to be had but they wouldn't add a vast amount of bhp because of the boost etc your running , a well designed manifold will give slight gains low boost but really come into its own at high boost pressures. The jenvey plenum which was originally design for the evo engine made 76 bhp just by adding it to the engine with a map to make sure the fuelling was correct no added boost etc. In the test in one of the ford mags they did a test on zetec turbo inlets running low boost 8 psi I think and the jenvey and area six inlet did very well. If you think Ł750 + for 20/30 bhp is value for money then go for it but try getting that much bhp anywhere else on a engine for less than a grand.
Plus it's not all about bhp like I said earlier I would much rather have my engine running 20 psi make 500 bhp than 30 psi make 500 bhp and it can also give you a lot better throttle response throughout the Rev range.

Gus i take it your just using the mounting plenum chamber and not the roller barrels mated with throttle bodies?

Cheers Paul

 

He certainly did. It made 350 BHP on his engine didn't it? It lives on my ZVH these days. I haven't had any numbers done, yet.

 

TBH, my Clio prior to me buying it came with a Ł200 remap. If it were me I would not have paid for it. But it dos vastly improve the experience ; it's no longer flat below 5krpm like the rest, it feels bigger than its size. I can see where you are coming from.

I'm debating going to EFI but am deciding what hardware to go with ; I already have a spare MFI manifold.

 

Roller barrels and throttle bodies !

Just the throttle bodies on mine

 

Shit iPad , what it was meant to say was using mountune plenum mated to jenvey throttle bodies and your not using original roller barrels lol.
Can I asked why you binned the rollers

 

Cos the fella selling only had the plenum


Would still like some but would need a spacer made up to match the head

No dramas really I guess

 

What size throttle bodies are they