Lower RS inlet on a 172 - is there an actual benefit?

[midge]

Is there an actual benefit to changing the lower inlet?

 

[R3k1355]

The RS inlet better matches the gasket, so it's thought it flows better and increases power.
The Phase 2 172 did come with an RS stamped lower inlet though

 

[Diagro]

Yes if it's not got one.
but if you haven't got one I would personally get some matched inlets as you will see a nice 10+ gain going from non rs inlets to matched.

 

[Djw John]

No you won't.

 

[.Stevo.C.]

Yes if it's not got one.
but if you haven't got one I would personally get some matched inlets as you will see a nice 10+ gain going from non rs inlets to matched.

No chance of that.

 

[Goodj]

You'll get to pull bits of your engine apart, put it back together and forever hope that disturbing it hasn't started the countdown to collapse.

You'll also make 0hp more than before

 

[Budgie]

Minimal.

Not worth the hassle.

 

[bloke]

Yes if it's not got one.
but if you haven't got one I would personally get some matched inlets as you will see a nice 10+ gain going from non rs inlets to matched.

10 what?

 

[coverman]

10 Pub Horsesh*tpower

 

[Goodj]

10lb/ft of McDrift trays

 

[marinemackay2003]

10 + cool points

 

[ADS_V6]

i will have jamsport matched inlets for sale in a few weeks,if anyone gets 10bhp from them it would be a miracle

 

[Diagro]

No you won't.

From NON rs to Matched you will see decent gains.

proven countless times on this forum so shut up the lot of you

 

[Goodj]

If you map the ECU to account for the new parts then maybe. Maybe.
But given how even a free-flow zorst wont give a 5hp gain on its own, how would a marginally improved inlet provide double?

Not saying impossible, but sounds more than unlikely, or iPhone app power-testing

 

[Djw John]

From NON rs to Matched you will see decent gains.

proven countless times on this forum so shut up the lot of you

I'm not saying you won't, I am saying you won't see 10bhp. Knock a zero off that and you're closer to the mark.

 

[ADS_V6]

No chance of 10bhp,1-2 in honesty Diagro

 

[Rob]

I'm not saying you won't, I am saying you won't see 10bhp. Knock a zero off that and you're closer to the mark.

But ktec's website says 10.. it must be true

 

[imprezaworks]

I have matched inlets, came with the car. Like most things with these cars, pay your money, placebo affect kicked in. But if it feels better then crack on.

 

[midge]

I guess if i find time i may swap it over.

 

[Budgie]

From NON rs to Matched you will see decent gains.

proven countless times on this forum so shut up the lot of you

 

[ADS_V6]

You try but you really cant help some people on here

 

[Diagro]

Well, As i have said before, Lots of people saying there is good gains and then just as many to say there are none.

Mine are on the way so will be able to say if there is any gains when i get it on a dyno to see.

 

[ADS_V6]

hi diagro can you link some threads mate to this where people say about the power increase even ALD said it does no good,you could have had mine cheap aswell

 

[ALD]

Not worth it. Get the head done if you want power.

Ok it's not a bolt on easy job for the everyday diyer

 

[ADS_V6]

Not worth it. Get the head done if you want power.

Ok it's not a bolt on easy job for the everyday diyer

Hi if forgot what is the cost of this and how much would it cost someone to take the head out of my car and replace

 

[R3k1355]

hi diagro can you link some threads mate to this where people say about the power increase even ALD said it does no good,you could have had mine cheap aswell

There were a bunch of threads several years ago when people were doing it, I can't remember any back to back comparisons on a rolling road tho?

 

[TarkMalbot]

Too many variables to know if comparing different cars so unless you do a back to back test on a dyno with your car it's hard to say. My 172 engine without RS stamped inlet felt much stronger than my 182 with RS stamped inlets. Both just had belts and dephaserand set up correctly.

 

[ALD]

Bigger isnt always better when it comes to these thing.

 

[Martin_172]

Of you already have it then definitely fit it, I wouldn't buy one for it tho. I had a good experience with matched inlets I'd like another set

 

[midge]

Ive sold it now, after reading the comments i decided it probably wasnt worth the time!

 

[Djw John]

Aye I for some reason have 2 ph1 ones which I should really get round to selling

 

[172mk1 lover]

Aye I for some reason have 2 ph1 ones which I should really get round to selling

Let me know if you sell!

 

[Djw John]

I'll be selling for sure, defo dont need 2!

 

[172mk1 lover]

Let me know if you sell!

How much bud?

 

[Djw John]

Er, @midge what did yours sell for?

 

[midge]

Phase 1 don't have a stamped rs lower inlet?

 

[Smiffyboy1990]

I always thought the 172 Cup's had the the stamped inlet.

 

[172mk1 lover]

Phase 1 don't have a stamped rs lower inlet?

So do they have them on anyway?

 

[midge]

@Djw John No RS stmaped lower inlets on a phase 1?