How to get a bit more torque out of my 172??

[Big Spence]

wondering if any one could give me a bit of help/advice on getting a bit more torque outta the 172, im getting a new cat back exhaust, havent decided which yet though and an modified inlet, just wondered if theres anything else i could do thats not mega bucks??

 

[Chi]

RS Tuner Remap cams.

 

[Big Spence]

i was supposed to put apart from mapping, sorry, ive been looking at an RS tuner is it difficult to do yourself, not very good with CPUs ha,
is it a big job to put new cams in??

 

[Chi]

Cams is a big job unless your needing to do belts anyway. . RSTuner is easy and there's a guide

 

[Liam B]

i was supposed to put apart from mapping, sorry, ive been looking at an RS tuner is it difficult to do yourself, not very good with CPUs ha,
is it a big job to put new cams in??

If I can do the RStuner myself, you can do it (I'm useless with computers). You just need a laptop and a battery charger. It also comes with full instructions on how to do it and it transforms the mid-range torque.

 

[Big Spence]

RS tuner it is then, cheers guys im pretty new to engine mods, its always just been suspension, brakes, alloys and induction, one more thing do you know of a reasonably quiet aftermarket exhaust? i do about 80 miles a day so dont want the drone on the motorways

 

[l33th3tr33]

RS tuner it is then, cheers guys im pretty new to engine mods, its always just been suspension, brakes, alloys and induction, one more thing do you know of a reasonably quiet aftermarket exhaust? i do about 80 miles a day so dont want the drone on the motorways

Oreca group N is supposed to be quite good. Youtube it.

 

[Chi]

I've got an rstuner I'm finished with. £120 collected

 

[Chip-mk1]

RS Tuner will give you a moderate increase in a small part of the rev range.
Exhaust / filter etc wont do anything you notice other than more noise really.

Cams do make a difference but its still only going to be 10% or so and cost the value of your car including fitting and mapping.


Unless you are prepared to spend big for small increases, just enjoy the way the car handles instead, thats what they are for not top speed runs.

 

[Dan@SJM]

Oreca group N is supposed to be quite good. Youtube it.

What? Do you value your hearing???

 

[l33th3tr33]

What? Do you value your hearing???

Somewhat, I was only jesting though.

 

[Big Spence]

that does sound good but its definitely not quiet haha

 

[Big Spence]

yeah i understand that mate, just after a bit more pull really, a steady constant pull would be nice, would an exhaust not make a difference? ive always thought they did when ive put them on other cars suppose that could be more of a placebo thing with the noise though :/

 

[Big Spence]

I've got an rstuner I'm finished with. £120 collected

Cheshire is a trek from where iam pal

 

[l33th3tr33]

There's quite a lot of threads covering this already and the short story is if you want more power/torque then your wallet best be deep. Air filter/exhaust/remap won't add much, if anything, but a decent map can make the car a lot more drivable.

 

[imprezaworks]

Ask chi to post the tuner?

 

[Big Spence]

Yeah I've spoke to Chi mate, cheers though, surely though if I get a decent cat back and matched inlet manifold, then map it, it should make some difference, please correct me if im wrong, like I said im new to 'tuning'

 

[imprezaworks]

It won't, be minimal. Although with out lay of cost etc will make you think its super fast. With these cars concentrate on grip, brakes etc. unless you spend big money your not going to get big gains.

but, it will be nicer to drive with the bits your thinking of doing.

 

[ed55j]

182 manifold, exhaust, matched inlets and rs tuner should give it a bit more poke

 

[Big Spence]

Thanks alot for your help mate, probs just get the manifold and the tuner for the time being then, already got an eibach pro kit waiting to be fitted and full set of Yoko S drives on it new discs and pads, so I think that'll do unless someone gives me a few grand for throttle bodies haha

 

[Chi]

I've got a 182 manifold too

 

[Big Spence]

What's the benefit of a 182 manifold?

 

[Mr R.]

Better flow, its 4 into 2 into 1.


Its not an easy fit though, if you can do it yourself then its worth it.
If you have to pay someone then its not.

Sub frame off to fit or engine out.

 

[Chip-mk1]

182 manifold does make a difference if you are actually looking on a rolling road graph or at an AFR plot etc, but nothing you would ever notice when driving IME, having a half or a full tank of fuel will make more difference to your cars performance!

 

[Big Spence]

Would CNC'd 172 one not be better? And I have a friend who's a mechanic, who'd pretty much do it for nothing anyway.

 

[Chip-mk1]

Would CNC'd 172 one not be better? And I have a friend who's a mechanic, who'd pretty much do it for nothing anyway.

People were talking about the exhaust one mate.

On the inlet side, yes a matched one is *slightly* better than a standard one.


But all the mods mentioned in this thread added up wont make as much difference as you will have lost if your cam timing isnt spot on.

 

[Big Spence]

Ah right haha I did mention it was an inlet manifold before, easy mistake and thanks for your words of wisdom

 

[Timmsy]

Cheshire is a trek from where iam pal

An hour drive? not that far surely? lol. I did a 5 hour round trip to get an exhaust the other day

As Chip says though make sure your timing is spot on o its all pointless, saw a few at the Surrey RR day with this issue

 

[Big Spence]

Yeah I thought it was further than tbh mate, had a look last night, depends on what will be cheaper petrol/postage, and could anyone recommend a good place to get it checked in northwest?

 

[imprezaworks]

Birchdown

 

[Silent_Scone]

Depends on how realistic you're being when you say you want more torque. forced induction is basically your only route

 

[Chi]

Contrary to popular belief torque is not cheap!

 

[imprezaworks]

I see what you did there

 

[Big Spence]

Depends on how realistic you're being when you say you want more torque. forced induction is basically your only route

im not after silly gains just a bit more pull low down, well as far through the range as i could, but from what everyones said thats not really possible without turbo/throttle bodies etc, im gonna do a few basic mods and see about 6-9 months down the line and may get throttle bodies, if i can convince the missus

 

[Kneesparks]

Put the car on a diet. Less weight makes the car faster and handle better.

 

[Russ_16v]

im not after silly gains just a bit more pull low down, well as far through the range as i could, but from what everyones said thats not really possible without turbo/throttle bodies etc, im gonna do a few basic mods and see about 6-9 months down the line and may get throttle bodies, if i can convince the missus

as pretty much everyone has said, getting power out of these engines is not too easy (bear in mind they are based on the 138bhp unit out of the Espace/Laguna, so they are already 'tuned' as it were) but what does make a difference is a remap - the standard cars have the '5k kick' - decent maps smooth this out and gives a better power delivery

 

[WilkyWay]

im not after silly gains just a bit more pull low down, well as far through the range as i could, but from what everyones said thats not really possible without turbo/throttle bodies etc, im gonna do a few basic mods and see about 6-9 months down the line and may get throttle bodies, if i can convince the missus

If you want more pull low down you need forced induction. The F4r is designed to be revved, not to give you decent mid range. TBH the standard engine has more than enough power for you to have a lot of fun on twisty roads, not the fastest thing in a stright line but good on b-roads if you keep the revs high.

 

[Chip-mk1]

If you want more pull low down you need forced induction. The F4r is designed to be revved, not to give you decent mid range. TBH the standard engine has more than enough power for you to have a lot of fun on twisty roads, not the fastest thing in a stright line but good on b-roads if you keep the revs high.

Trouble is the F4R actually ISNT "designed to be revved", its designed to be moderately torquey in the midrange if you look at things like the bore and stroke and rod ratio of the bottom end, but then renault tuned it to rev, which means its a massive compromise, you have an engine that doesnt naturally want to rev, being used out of its comfort zone geometry wise just because its got fairly hot cams.
What an F4R design really lends itself well to is 5Krpm and a bar of boost!

 

[Alex_X93]

Dont bother with cat back imo go for caf ducting into a ph1 airbox itg panel filter, remap, matched inlets in that order then if flush maybe a sports cat and possibly larger tb.

 

[Dan@SJM]

Absolutely no point in getting a larger throttle body.

Why would you map it then change the spec?