Clio 2.0 tuning, with ecu and higher revs

[|sAs|]

Hey lads.

Anybody got experience with this kind for tuning, where the engine revs to 8000rpm, does the engine take damage because of this ?



Regards |sAs|

 

[Tom_16v]

Dont think you can rev it to 8K RPM with just a chip.

Id have thought youd need some wilder cams too, shouldnt do any damage as long as its fueling right at those kind of revs.

 

[jon_r]

aparently no damage so ive heard.

Why would wilder cams make any difference?

Yes the r-sport/hillpower ecu allows you to rev higher.

 

[Tom_16v]

To increase the fuelling so its safe to rev that high....

Didnt know a chip alone on the 172s would let you rev to 8K.

 

[Adams_16v]

iv read that the valver can safely rev to 8k!

 

[swelch]

my concern is if it is ballanced well enough for those revs. If not bye bye main bearings, big ends and the like !

 

[JAY172]

personally in the long term i think revving them to that speed will reduce the life span of the engine slightly.revving race car engines to them speeds is ok because they havent really got to last as long as the engine in your road car.

 

[edde]

Best asktony cart for details as he works with the cup racers.

9200 is the region for bent valves.

Running upto 8k shouldnt be any problem it will shorten engine life but if you use it only when the engine nice and warm I cannot see it shortening the engine life to much. The 172 engine is an evolution of the williams one and those are good for 300+k so even if you half the life then its no big deal.

EDD

 

[tonykart]

with the ecu you not only increase rpm but also fine adjust other parameters like fueling and mixture together with an octane level of at least 97 there will be more power and torque available. Don´t think that increasing the rpm´s till 8000 will do wonders. The drivability of your car will be noticable, the most sort of reaction you hear is ´my car feels more attached to the gas´ and thats what has been done by chiptuning. Don´t ask for wonders in power and torque on a NA engine, figures of +18 bhp on a RS is not true. A good chip, a nice exhaust system (decat or sportcat) and a good airfilter (K&N insert or Viper) will bring around this amount of power.

Question 2 enginetroubles till 8000 Rpm´s. To tell you the truth I think reving till 8000 Rpm constant will not be ok for the car, I even think that for normal ´road-use´ 7500 Rpm will do. In clioracing engine we rev. till 7500 Max. adn for the last 3 years no engine damage in three seasons of clioracing for 7 running cars !! but one of the most important thing with tuning is good race-oil which is warm very quick and will lube also on extreme hot circumstances.



cheers

 

[Rick_172]

tony, nice reply m8. good to hear from an expert.

one thing tho. its frequently mentioned about bhp increases from ECUs, exhausts and induction kits, and above it is said you can reasonably reach 18bhp increase.

What kind of lb/ft increase in torque are you likely to achieve from these modifications, considering the 172 peaks at 148 lb/ft?? (which is still more than a Civic Type R )

Cheers

 

[tonykart]

The drivabilty is often linked as torque which I think is true. The mayor thing in chiptuning is increasing the torqueband over a certain part of powerband.The drivability is better and responses are good over a larger band. The increase of torque is around 20 Nm. So you will be ending at almost 220 Nm of torque (lb/ft you have to calculate yourself)



Cheers

 

[Rick_172]

tony, cheers for that!!!

the conversion factor from Newton metres (Nm) to lb/ft is 1.36, giving you a rather respectable 161 lb/ft. Looks like its the Group N for me, to add to my viper and planned exhaust and decat, cos i aint that interested in bhp, its the torque I want.

And I suppose the Group N ECU has a different algorithm for interpreting the information recieved from the lambda sensor in order to get the fuelling right...

Just the answer I was looking for mate! Thanks!

 

[tonykart]

Well the crosstalk from the lambda isn´t that of an issue your TDC is more worrying I would say. (TDC-knock. sensor) Just ask the guys on what octane-level the chip is locked and make sure you always take that octane level. No problem if you once forget but the car will run NOT well. As the TDC will r****d the ignition (startproblems, idle and max.power will be NOK). It will not break the engine by the way but it just feels sh*tty....



Cheers and thanks for the conversion factor.....

 

[BenR]

I have had a 172 run 8000rpm or over a year no problems.....but you wont be making any power up there, its falls off cam quite rapidly the 172 and its far more useful for jsut holding a gear round a corner.

A chip will allow you to run 8000rpm and should provide the appropriate extra fueling.

 

[Fred@BTM]

Ben + Tony, just out of interest, what power do you think mr ROAMER would get if he fully balanced his engine and added a "BENR SPECIAL HEAD JOB"???

currently at 212bhp

 

[viceroy]

Does anyone know what cam the 172 uses? 260 degree?

Also how far can you go with a 172 cam before you start hitting problems

 

[tonykart]

FYI you dont wanna have different cams on a 172 ! runs sh*t idle anyways why bother in running even sh*ttier. (I tried but threw them out).



cheers

 

[BenR]

Wilder cams will run sh*t with the OE management principals and the plenham chanber....but junk it all and itll run fin with wilder cams, abiet with a higer RPM needed to sustain a smooth idle.

cams specs are.

inlet 234 degduration, but 1 lobe opens 4 deg after the other. phase advance is 16 deg.

Exhaust is 225 with the same 4 deg difference between each lobe.

lift is 10.998 inlet and 9.999 exhaust.

How far can you go with the cam?

i assume you mean how far can you go with the profile.....you can go as far as you want so long as you can keep the valves from flaoting and bouncing at the rpm needed to sustain a flow path.

Roamers engine will benefit from a balance as its so sh*t from std.

Gains in power from balancing, nill......but gains from spinning up and less reciprocating masses....a fair bit.

And with headwork on std cams...possibly another 10bhp, with the increase becomming non linear with supplement cam changes. i.e. when he reaches the limitations of the std port flow at whatever lift hes going to run.