I am tagging along with a renault sport rolling road day this coming saturday, 2nd May. The location is Rs tuning in Leeds. The price is 35 pounds and will include a boost and afr trace, so i have been reliably informed. Any interest?

Maybe, depends on work! Do you need a definate answer?

Assume your talking power runs too.

no don't need a definate answer, doesn't matter either way. Will be power runs yeah

I'm a probably then.

What kind of times? I guess with a not so definate answer I may have to wait my turn.

i think they'll just peg us on at the end phil. Probably want to be down there about 10 ish i reckon.

I shall let you know nearer the time.

Website for RS tuning; http://www.rstuning.co.uk/index.php

Anyone coming?

I'm a probably.

Still 10ish? Seems a bit early if i'm slotting in at the end.

Do you want to pm me your mobile number I can drop you a text or something.

Also, how can i best test for a slipping clutch? I guess boot it in a high gear off boost, and wait till boost comes in.
I'm sure I had it slip a few weeks back, not had it since. But guessit's not worth while getting rolling roaded if its still slipping.

Cheers
Phl

Not sure how many cars are going Phil, if there isn't too many it may finish early which would mean you might turn up and there'd be nobody there. I would think 11o'clock would be ok though.

I tested my clutch by going uphill, putting it in 4th at low revs then flooring it, this puts loads of load on it and made mine slip when it was knackered.

Also, i think u can try having the car at a standstill, put the handbrake on, put it in 3rd, rev to about 1800rpm,and slowly lift clutch up. That would make it slip if it was on way out.

The RR wont put as much load on as road driving so you should be ok to run, even if you are getting the 1st signs of slippage

If your not about is it the fella with the chunk out of his arm with the clio that'll be about?

Hoping to make it.

Yeah thats him, he's got a megane now though. I'll be there with him all day.

He wants you to come because Renaults never make there stated power, and i said that a 10yr old fiat will have more power than his 3 yr old "225bhp" megane.

I'll PM you my mob

Fingers crossed my new one is good as my last then!

Green one was 226 with just a greddy and panel filter.

New one has panel filter and exhaust but for some reason feels much quicker.

Cheers

Good-ish results for me and Phil today.

Here are my graphs;



As can be seen, there is a dip in power around 5600rpm. Possibly a bit mre advance needed at that point?
It also seemed to run richer as the runs progressed, i don't know why?
Maybe the boost could do with a tweak at around 4600rpm?

Interested to hear peoples thoughts on these results as i cant help but feel my spec should be getting a higher power output (GT28R, FMIC, SIP, Aquamist, Apexi AVC-R, 3" DP), what do you reckon?

was this organised by cliosport.net? i still use that forum now! banter is second to none!

It was the renaultsport forum. Good turn out actually. The clio 197's are pretty pathetic though. They never make anywhere near claimed power-around 175bhp seemed usual

they done that rr in 4th i thought it was 3rd gear was the right gear for rr in coupe,might be wrong

No 4th is the daddy. Its closest to a 1:1 ratio

just going to find mine now ill be back in a mo

All the dyno demon ones were done in 3rd, and a lot of other rollers run in 3rd but 4th is a better gear to run in. I don't think it will make a massive difference to be honest

i new mine was in 3rd
http://i53.photobucket.com/albums/g45/cowboykarl/patsphotos020-7.jpg

it doesn't make a big difference. When we were at Racing Line in halifax mine was ran in 3rd and 4th. The differences were minimal!

Like you say, the results are pretty good with 287bhp and 283lbs/ft, the car is nice and torquey in the midrange

The reason peak power is not quite where it should be is due to the torque dropping off quite sharply for a GT28R. Given that it is boosting well i.e. 1.4bar holding 1.2bar at 7000rpm, it could be the engine is being strangled at the top end with too much back pressure. Then again the turbo may be a little tired as it's done a far few miles or perhaps charge temps are a little elevated.

Don't change the boost profile, the little dip at 4600rpm is only 0.03bar! It's actually very smooth and holding it perfectly.

All in the car appears to be running well with good fueling and boost. As long as it feels great on the road like you mentioned last week then I would just enjoy On another dyno you might make an extra 10-15bhp, but as you know it won't change anything in reality.

And mine here. With k+n panel filter and cat back scorpion.

link

Was as I expected, pretty chuffed that a new mapped clio 197 was only running at 180bhp where as my 10 year old rusty fiat was as it should be.

Cheers Leighton, just what i wanted to hear. I think you've done a cracking job anyway and it does drive lovely so can't say better than that.

E46 M3 *only* ran 322bhp as well.

Good day for rusty old fiats!

are you not running a tad lean phil as you come on boost ? on your graphs its only at 5500 rpm you get to sort of where you want to be 11.5 - 12afr

Haven't a clue, was told it was ok.

You say a tad lean, remember i'm not really running any mods.

i know your standard , not trying to worry you !

it may just be the scale of the graph, have a look at mine for comparsion i have same mods as you.

[IMG]http://i45.photobucket.com/albums/f69/fiatcoupe20vt/th_IMG2.jpg[/IMG]
[IMG]http://i45.photobucket.com/albums/f69/fiatcoupe20vt/th_IMG.jpg[/IMG]

Just been thinking about my results and comparing to some old results i had.

Before my car was mapped i ran 299.2 bhp at fly and 236.2 at the wheels, on a dyno dynamics rolling road at Racing Line Halifax. If we use a calculation of 20% transmission losses, then 20% of 299 = 59.8
299 - 59.8 = 239.2 which is pretty much bang on the money.

The latest results state that i got 242bhp at wheels but only 287 at fly. Using the same calculations this means that with this wheel horse power, i should in fact have around 304bhp at fly.

Because using the RS tuning calculations i am only losing 45bhp through transmission which is approx 15.6%.

Anyone any ideas on what is the correct transmission losses?
Has he used an incorrect setup, or is it 15%, does anyone really know!?

Cheers

The only accurate way is an engine out job isnt it?