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Author Topic: Changing cams on X25XE - change exhaust manifolds?  (Read 461 times)

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JimmyR

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Changing cams on X25XE - change exhaust manifolds?
« on: 14 November 2018, 21:06:07 »

This week or next I was planning to change the standard cams on my X25XE for four X30XE G cams that I've had in the garage for ages.

While I'm* under the bonnet and elbow-deep, would it be worth changing the exhaust manifolds for those from a Y26SE or Y32SE?
I've read here that they flow a little more freely and I can probably get some for this weekend/next. I'll be changing the cambelt, water pump and tensioner anyway

Opinions are gratefully received  :)

(and if anyone has any other pro tips for getting a little more power from an X25XE which is currently standard, I'm all ears :) )







*This may be someone with more mechanic skills than I have. We will see how it goes
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Doctor Gollum

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Re: Changing cams on X25XE - change exhaust manifolds?
« Reply #1 on: 14 November 2018, 21:44:28 »

Drop a complete 3.2 lump in and swap the sensors for your 2.5 ones... A 3.0 ecu and transponder chip set would finish it off ;)
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JimmyR

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Re: Changing cams on X25XE - change exhaust manifolds?
« Reply #2 on: 14 November 2018, 21:47:39 »

Drop a complete 3.2 lump in and swap the sensors for your 2.5 ones... A 3.0 ecu and transponder chip set would finish it off ;)

The other option would be the Z20LET that I have! That could be the longer term plan...

For now I'm keen to keep the 2.5 in there. Just using up the cams I have and checking if there's anything else simple that I should be doing
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Doctor Gollum

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Re: Changing cams on X25XE - change exhaust manifolds?
« Reply #3 on: 14 November 2018, 21:48:28 »

Waste of time and money  ;)
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Migv6 le Frog Fan

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Re: Changing cams on X25XE - change exhaust manifolds?
« Reply #4 on: 14 November 2018, 21:50:15 »

2.6/3.2 exhaust manifolds are a worthwhile upgrade.  :y
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JimmyR

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Re: Changing cams on X25XE - change exhaust manifolds?
« Reply #5 on: 14 November 2018, 21:53:22 »

Waste of time and money  ;)

I think that you're probably right....I just think that since the cams are there anyway and I want to change the belt and tensioner it's worth a go.

The 2.0 turbo has way more potential than the 3.2 for out and out power, so if I was doing an engine swap, that's what I'd do
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JimmyR

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Re: Changing cams on X25XE - change exhaust manifolds?
« Reply #6 on: 14 November 2018, 21:54:40 »

2.6/3.2 exhaust manifolds are a worthwhile upgrade.  :y

Thanks, how worthwhile are we talking? Best to put them in with the cams or can they wait?
Is there anything else that should be done along with them?
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Nick W

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Re: Changing cams on X25XE - change exhaust manifolds?
« Reply #7 on: 14 November 2018, 22:56:35 »

2.6/3.2 exhaust manifolds are a worthwhile upgrade.  :y

Thanks, how worthwhile are we talking? Best to put them in with the cams or can they wait?



On a 3.0l they allow the engine to rev slightly faster over about 4000rpm. If you regularly do that(and I never did), have a pair plus the gaskets and like awkward time consuming jobs, then fit them. I did mine because a pair came up cheap while I had the heads off; I wouldn't bother with them again.


Fitting the bigger engine is a better use of your time and money.
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