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Guest Daniels

Optimal Inlet On Head.

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Guest Daniels

I have a 205 in which I have a 2,2 block (a modified XU10J4R, 406 2,0 block to achieve the 2,2 liters) and a CatCam 274.

 

With this block I have mounted a XU10J2 head from a 306 XSI 8v which has been ported and modified.

 

I can see that many users use the XU9JA inlet from the 205 GTI but is that the most optimal?

In my case I have some problems with performance as if something is limiting the power to 144hk/186Nm.

 

I have searched the forum but have not found anything conclusive.

 

Which inlet is the best for a XU10J2 (306 XSI 8v) and what to do?

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carbers205

The port shape is quite different between the 205 and 306 heads and inlets, 205 is square and 306 is round so it wont be ideal putting the 205 inlet on the 306 head.

I take it from this you are opting for a standard inlet rather than throttle bodies though?

What management are you planning on using?

The tb is quite different between the 205 and 306 too with each of them having different sensors so that may have a bearing on your choice.

 

Andy

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Guest Daniels

I was figuring that the reason why so many uses the standard 205 GTI inlet is because of the difficulties with management with the 306 XSI 8v inlet...

 

I was hoping to use the standard Jetronic management even if I change the inlet to the 306 XSI 8v inlet - but is that possible to do without a massive reconstruction?

 

As I move forward with this project I have an idea of using a MegaSquirt management system but I would prefer to use the standard management because the MegaSquirt project will be quite expensive as I have to pay my way out of it. I am much more of a theoretical than practical car-enthusiast :)

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16v205

Ive just built a head a few months ago for a mate using a xu10 head and 1.9 205 manifold. I used carbide burrs to port match the head to the manifold and it seems to be working ok :) We have a before power run of 122bhp on the standard engine but were yet to get a comparison after the headwork.

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Guest Daniels

Would be nice to see some measurement before and after.

If it is worth the extra work modifying the XU9 intake or the XU10 just is better?

 

It seems that the general opinion is that the XU9 intake is the way to go and it should have a better flow - but still... I have not found any conclusive evidence for this conclusion.

 

Anyone with some XU9 and XU10 intake experience on XU10 head is welcome.

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whizzer71
Would be nice to see some measurement before and after.

If it is worth the extra work modifying the XU9 intake or the XU10 just is better?

 

It seems that the general opinion is that the XU9 intake is the way to go and it should have a better flow - but still... I have not found any conclusive evidence for this conclusion.

 

Anyone with some XU9 and XU10 intake experience on XU10 head is welcome.

 

 

What about 405 Sri / BX 8v Gti Inlet manifold

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Guest Daniels
What about 405 Sri / BX 8v Gti Inlet manifold

 

Any pics of the different inlets?

 

Is the 405 SRI inlet not the same as the 306 XSI 8v inlet?

Both are 2,0 and 8v engines from Peugeot/Citröen.

 

The BX 8v GTI isn't that a 1,9 inlet which is the same as the 205 1,9 GTI inlet?

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whizzer71

No the inlet ports are the same on both the 405 sri and BX Gti (1.9 8v GTi),They are the same as the XU10 8v inlet ports and share the same stud pattern,but different to the 205/309 1.6 & 1.9 Gti and Citroen ZX 1.9i which are the only cars that I know of that used the manifold with the square inlet ports

 

If you can understand what Im trying to say ?

 

:)

Edited by whizzer71

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Guest Daniels
No the inlet ports are the same on both the 405 sri and BX Gti (1.9 8v GTi),They are the same as the XU10 8v inlet ports and share the same stud pattern,but different to the 205/309 1.6 & 1.9 Gti and Citroen ZX 1.9i which are the only cars that I know of that used the manifold with the square inlet ports

 

If you can understand what Im trying to say ?

 

:blush:

 

I think I get it now :o

 

That sounds as if the inlet of the 405 SRI/BX GTI (1,9 8v) actually fits quite good on the XU10 8v head since the stud pattern is round.

 

I have been wondering if it would not be a limiting thing when using the square inlet stud patterns of the 205/309 1,9 GTI inlets on a round stud pattern head of the XU10 8v...

(Did I get it right? :) )

 

But it is propably not an easy thing making one of those 405 SRI/BX GTI (1,9 8v) inlets fit on my 205's engine management system?

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jackherer
No the inlet ports are the same on both the 405 sri and BX Gti (1.9 8v GTi),They are the same as the XU10 8v inlet ports and share the same stud pattern,but different to the 205/309 1.6 & 1.9 Gti and Citroen ZX 1.9i which are the only cars that I know of that used the manifold with the square inlet ports

 

If you can understand what Im trying to say ?

 

:blush:

 

Thats nearly correct, you omitted the Citroen Visa GTi from the list :)

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Baz

The SRi/BX inlet also uses and Mi16 type twin butterfly TB.

 

I have one outside, i'll get some pics in a bit.

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jackherer
The SRi/BX inlet also uses and Mi16 type twin butterfly TB.

 

I have one outside, i'll get some pics in a bit.

 

Slightly smaller bore though, they are useful for fitting on your friends Mi16s if you anticipate any competition :)

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whizzer71
Thats nearly correct, you omitted the Citroen Visa GTi from the list :blush:

 

Yeah should have remembered that I used to work on them,Was a hell of a long time ago !,Like nissen huts on wheels :)

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whizzer71
The SRi/BX inlet also uses and Mi16 type twin butterfly TB.

 

I have one outside, i'll get some pics in a bit.

 

Im still after a manifold+fuel rail etc If you have one Baz

 

:)

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