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Group N timing and SM inlet



JP83

JP83

South Central-Oxfordshire
ClioSport Area Rep
I have yet to fit the SM inlet I purchased to my 172, but before I do I was wondering whether anyone was running one, with Group N timing?

Is anyone running just the SM inlet on standard timing, and running a standard(ish) 1*2 on Group N timing?

@bloke do you have any Dyno graphs for the above?

Basically wanting to know if one of those mods would cancel out the other if both were fitted.
 
Chambers_RS

Chambers_RS

ClioSport Club Member
  Clio 172 Cup&Leon K1
I’ve got an RS2 with GrpN timing but with a few other bits done too.

83C6FFB5-DE6A-41CC-A27B-243104B3D00E.jpeg


56E3BE9D-4268-4496-80B0-E4682780B7D4.jpeg


Might give similar results
 
B

bloke

  dan's cast offs.
nothing on gp n sorry. know a couple that have been done and they didn't give any noticeable gains over standard. can't remember if i was speaking to chris about the gp n timing on them and it possibly not working that well with the set up? could be wrong though as it was couple of years ago.
 
Gus

Gus

ClioSport Moderator
  182Turbo,DCi90
@bloke have you had any experience with SM inlet and 197 cams ? Just wondering if this is a good combination ?
 
B

bloke

  dan's cast offs.
with 197 cams they seem to do over 190bhp, couple been over 195bhp. the first inlet they did though seemed to give the best results, on same/similar spec the second one wasn't as good. only seen one on the latest one, can't remember the figures but was poor, think was only about 185bhp?

when they were £500 was good value for money but now i wouldn't bother with one, especially as the newer one hasn't proved itself yet.
 
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JP83

JP83

South Central-Oxfordshire
ClioSport Area Rep
bloke said:
nothing on gp n sorry. know a couple that have been done and they didn't give any noticeable gains over standard. can't remember if i was speaking to chris about the gp n timing on them and it possibly not working that well with the set up? could be wrong though as it was couple of years ago.
Click to expand...
No problem buddy.
I'm steering towards fitting the SM inlet and getting it mapped first anyway. Belts were only done last year so wouldn't fit cams now anyway; perhaps later on when the belts are due.
 
R3k1355

R3k1355

ClioSport Club Member
bloke said:
when they were £500 was good value for money but now i wouldn't bother with one, especially as the newer one hasn't proved itself yet.
Click to expand...

Can't help but think that with the amount of money you could spend, the power gains are pretty bad.
The F4R doesn't respond well to N/A tuning.
 
Tim.

Tim.

ClioSport Club Member
R3k1355 said:
Can't help but think that with the amount of money you could spend, the power gains are pretty bad.
The F4R doesn't respond well to N/A tuning.
Click to expand...
But with these inlets, especially the RS2, you can enjoy the benefits, potentially for years, then still sell it for a very healthy amount, and encounter almost no additional costs as a result.

It would be interesting to run a cost comparison against both a turbo and ITBs over say a five year period. What's the cost per bhp after resale.
 
B

bloke

  dan's cast offs.
think he cast them? saw some pics on his idiotbook page a while ago, can't check though as i got kicked off it, don't know why :innocent:
 
alexroberts0289

alexroberts0289

IMAG0715.jpg
For reference, my 182 is making 201.5bhp with the following: SM Inlet, 197 cams, ramair filter, RS192 exhaust, de-restricted CAT, Engine Dynamics custom remap.
The dyno graph shows 3 lines with basic supporting mods; Lowest run at 179bhp with supporting mods and rstuner map, middle run at 190bhp with previous + SM Inlet, Best run at 201.5bhp with previous and 197 cams.

Was pretty pleased with the outcome! Especially considering Andy at Engine Dynamics said it had originally been a little down on power with the mods and rstuner.
 
Last edited:
Gus

Gus

ClioSport Moderator
  182Turbo,DCi90
The machine work that goes in to these is pretty amazing. They are very well made and considering they are made out of a huge billet of aluminium is pretty cool. To have something like that made in the uk would cost thousands wouldnt it?
 
Gus

Gus

ClioSport Moderator
  182Turbo,DCi90
alexroberts0289 said:
View attachment 1355747 For reference, my 182 is making 201.5bhp with the following: SM Inlet, 197 cams, ramair filter, RS192 exhaust, de-restricted CAT, Engine Dynamics custom remap.
The dyno graph shows 3 lines with basic supporting mods; Lowest run at 179bhp with supporting mods and rstuner map, middle run at 190bhp with previous + SM Inlet, Best run at 201.5bhp with previous and 197 cams.

Was pretty pleased with the outcome! Especially considering Andy at Engine Dynamics said it had originally been a little down on power with the mods and rstuner.
Click to expand...
That is really impressive. The gains are well worth it in your case. How does it feel to drive compared to before you had the mods and remap done.

Also is there any issues with fitting the SM Inlet and driving around on it without having the remap done. I know you wont see any gains till the remap but will it have any adverse effects on the engine or anything?
 
vroomtshh

vroomtshh

ClioSport Club Member
  Seat Ibiza Cupra TDi
bloke said:
nope, you can get better custom fabricated for a lot less than you'd expect.
Click to expand...
I had a couple made on my last car and think I paid £500 for both. 2nd time included CFD modelling to improve over the first time
 
A

Aydon182

  182 Turbo
alexroberts0289 said:
View attachment 1355747 For reference, my 182 is making 201.5bhp with the following: SM Inlet, 197 cams, ramair filter, RS192 exhaust, de-restricted CAT, Engine Dynamics custom remap.
The dyno graph shows 3 lines with basic supporting mods; Lowest run at 179bhp with supporting mods and rstuner map, middle run at 190bhp with previous + SM Inlet, Best run at 201.5bhp with previous and 197 cams.

Was pretty pleased with the outcome! Especially considering Andy at Engine Dynamics said it had originally been a little down on power with the mods and rstuner.
Click to expand...
Great result, Engine dynamics rollers seem to be quite accurate aswell from my experience, no wild torque figures or anything. I knew this setup could crack 200 bhp, it did a long time ago on the 197 cams + RS2 inlet. Seems the RS2 / SM inlets dont seem to want to cooperate with 438 cams a bit like how ITB's never really liked the 438 cams either hence why 421's were a big trend with ITB's as they made the power.

I bet if you stuck arp rod bolts and raised the limiter to 8k rpm you could almost see 210 bhp on that setup.
 
B

bloke

  dan's cast offs.
JP83 said:
Hopefully that's the one I have! Lol.
Click to expand...


this was possibly the first one? it's the early type he did, the newest one is the third one. got a pic of yours? main difference on the first two is the inlet is slightly bigger on the second one.
 
JP83

JP83

South Central-Oxfordshire
ClioSport Area Rep
bloke said:
this was possibly the first one? it's the early type he did, the newest one is the third one. got a pic of yours? main difference on the first two is the inlet is slightly bigger on the second one.
Click to expand...
Will grab a pic tonight. I bought mine from @Bear Head and I believe he got it in the group buy?
 
alexroberts0289

alexroberts0289

Gus said:
That is really impressive. The gains are well worth it in your case. How does it feel to drive compared to before you had the mods and remap done.

Also is there any issues with fitting the SM Inlet and driving around on it without having the remap done. I know you wont see any gains till the remap but will it have any adverse effects on the engine or anything?
Click to expand...

Gus, apologies for my slow reply. Because I introduced one mod at a time, I phased the power in and so it wasn't such a large increase at once. However , each time I was surprised at what it did to the driving. When I first fitted the SM Inlet (the original group buy one) it was with the rstuner map and it drove fine, no running issues, but I got it mapped swiftly after to make the most of the increased airflow.

Low down power is as expected, not much difference, but the sound the inlet makes is quite different to the standard inlet, I love it.
High end, once above 4k rpm, it gets very exciting and pulls excitingly all the way to the limiter.
@Aydon182 I think you're right, and it would really benefit from the extra 500rpm, but engine longevity would be a worry at 8k rpm for me. Its on 102k miles at the moment. Should it go bang, then yes, I'll definitely be uprating bits!
 
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B

bloke

  dan's cast offs.
JP83 said:
I have yet to fit the SM inlet I purchased to my 172, but before I do I was wondering whether anyone was running one, with Group N timing?

Is anyone running just the SM inlet on standard timing, and running a standard(ish) 1*2 on Group N timing?

@bloke do you have any Dyno graphs for the above?

Basically wanting to know if one of those mods would cancel out the other if both were fitted.
Click to expand...


don't know if you've seen the thread but just had a 172 on normal inlets done on group n timing, before and after graph speaks for itself.
InkedBEFORE AFTER SMOOTH CROPPED_LI.jpg
 
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