Celtic Stage 2 Remap

F

Frankie169

Member
 North Somerset
I’m thinking about a stage 2 for my 20i from Celtic, they did my Brera and were very impressed with them

My Z has 76k on the clock and the cam chain is fine, question I have is with the mileage Is the remap like to cause any addition wear or have a detrimental affect to the engine, ie turbo etc bearing in mind the mileage???
 
Frankie169 said:
I’m thinking about a stage 2 for my 20i from Celtic, they did my Brera and were very impressed with them

My Z has 76k on the clock and the cam chain is fine, question I have is with the mileage Is the remap like to cause any addition wear or have a detrimental affect to the engine, ie turbo etc bearing in mind the mileage???
Click to expand...
You may want to chat to @B21 about Celtic tunes. He has quite a horror story about it.
If it's a rolling road one it's fine as you can see the results. But if it's a visit to your drive and just plug it in, I'm not sure you can guarantee a good result.
I took mine to a rolling road tuner who was previously a Celtic agent. He basically started with their generic map, but then took the time to tweak it to match my car. No two engines are quite the same and the difference in the graphs from generic to tweaked was quite significant.
 
  • Like
Reactions: B21
Appreciate that, also looking at PTorque, more concerned about the mileage and any affects on the componenets given the miles
 
I used a Celtic dealer for a remap on my Yeti and was very happy with it.

I guess with any remap there's always some risk of greater wear.
 
The two contradictory statements are..

If you re-map it to 28i power levels then that's what the factory did

If you overboost from there then you can expect accelerated turbo wear, greater stress on HPFP and plugs and coils.

But..the use of the overboost is infrequent and with a decent tune should be fine...

My bad experience was caused by a Celtic dealer flashing a map with no dyno....we never knew what had gone wrong
 
I've had 2 remaps without a dyno (one done at home myself, one done professioanlly) and one very expensive remap done on a dyno.

It's only the one on the dyno that caused any problems, havign to go back in a couple of weeks later to fix issues with the engine cutting out. Admittedly that was a more complex remap on an ECU they'd never seen before and increasing power by 65% whereas the other 2 were very modest gains so a lot less to go wrong.

Things can go wrong either way, but I guess the one done on a dyno will be easier to fix if there is a problem.
 
tiglon said:
Things can go wrong either way, but I guess the one done on a dyno will be easier to fix if there is a problem.
Click to expand...
The one done on the dyno should be fixed before you even move the car off it. The operator/tuner can see if there's an issue and fix it there and then.
If you simply get someone turning up, fiddling with a laptop then 'there you go mate, all done', apart from seat of your pants feeling, how do you have any idea what is happening to your engine?
 
Frankie169 said:
My Z has 76k on the clock and the cam chain is fine, question I have is with the mileage Is the remap like to cause any addition wear or have a detrimental affect to the engine, ie turbo etc bearing in mind the mileage???
Click to expand...
Any remap has a small risk attached, which is why noone will give an engine warranty.
However, if the engine has been well looked after all it's life; ie regular oil changes, air filter changes, etc I don't see why 76k miles should be any more of an issue than a lower mileage car.

When I had our 18i remapped (by superchips on the driveway) I did a full service on the engine just before. Oil and filter, air filter and plugs. It was purely so I knew the engine was in the best condition it could be for the increased power. Six years on and the car is still absolutely fine.

As said above, the N20 was designed to run at 245bhp and 350nm (i think), so something near that is going to be pretty safe.

Just check that the map can be run safely on 95 RON fuel. Some can't. I nearly bought an Audi S5 with a remap once. But at the last minute found out it could only run on 99 RON fuel which would be much more costly and very inconvenient.
 
enuff_zed said:
The one done on the dyno should be fixed before you even move the car off it. The operator/tuner can see if there's an issue and fix it there and then.
If you simply get someone turning up, fiddling with a laptop then 'there you go mate, all done', apart from seat of your pants feeling, how do you have any idea what is happening to your engine?
Click to expand...
Not always, you can't run through every possible situation in a few hours on a dyno, and a dyno can't remove the possibility of human error. As Pondy will tell you, no one gives a s**t these days ;)

To be fair, I doubt many who have it done on a dyno take the time to actually understand what is happening to their engine either.

How many dyno tunes actually are bespoke and not just slapped on with a dyno read out afterwards? I suspect the vast majority of tunes done with a dyno are just a template slapped on and fiddled with afterwards if an issue is obvious, but mostly just given a max power readout to make the punter happy.
 
Pondy said:
Just check that the map can be run safely on 95 RON fuel. Some can't. I nearly bought an Audi S5 with a remap once. But at the last minute found out it could only run on 99 RON fuel which would be much more costly and very inconvenient.
Click to expand...

If that was the supercharged S5 era you should have bought anyway, it's worth the hastle of constantly hunting for Tesco Momentum...
 
enuff_zed said:
I obviously need to be more precise.
With a rolling road tune, you can (if it's a decent place) observe the process, see the initial curves, where the issues are, if any, and then follow the steps to bring that curve into line properly.
A human error will show up (as it did in Peter's case) with a large discrepancy in the power and torque curves.
I accept that the majority of people getting a remap have no clue what it is achieving, or why, other than having a nice shiny max power printout to show to all and sundry from their bar stool.
My fault is that I apply my own mechanical understanding to other people instead of assuming the lowest common denominator. :rolleyes:
Click to expand...
Not sure that was necessary, but fair enough. Have a lovely afternoon.
 
tiglon said:
Not sure that was necessary, but fair enough. Have a lovely afternoon.
Click to expand...
Yeah it has already been pointed out and on a re-read it didn't come across as intended. It was meant as a generalisation of how I should word my theories, not aimed at you, or anyone else. Hence the reason it was already edited out before you posted.
My apologies for any offence taken.
 
Last edited:
  • Like
Reactions: B21
enuff_zed said:
Yeah it has already been pointed out and on a re-read it didn't come across as intended. It was meant as a generalisation of how I should word my theories, not aimed at you, or anyone else. Hence the reason it was already edited out before you posted.
My apologies for any offence taken.
Click to expand...
Sorry, I didn't see the edit until after I posted.

Don't worry about it, I was being over sensitive anyway!
 
  • Like
Reactions: B21
You must log in or register to reply here.
Back
Top Bottom