Pagina 7 van 38
Geplaatst: 15 mei 2008 20:15
door Herman
Deleted
Geplaatst: 16 mei 2008 6:07
door paulb
Herman,
Wie organiseert die dagen van Lotus on Track?
PaulB
Geplaatst: 16 mei 2008 8:23
door Elise
Geplaatst: 21 mei 2008 0:48
door rapidos
After driving at Spa on the 12th of may, the engine was not running 100% even if the car was quite fast. So I decided to check exaclty.
http://videos.streetfire.net/video/Pass ... 162266.htm
Basicaly, I have lost
63 bhp and 123 Nm somewhere !
It must not be a big deal, I just nee dto find out where is the problem and afterwards....

Geplaatst: 21 mei 2008 18:13
door alain
Hi Rapidos
2'52 with 245Hp what time will you do with 309HP ???
Do you know wich turbopressure you have?
I hope you'll find the problem soon,
Alain
Geplaatst: 21 mei 2008 18:44
door rapidos
Yep, I was quite surprised ! I still need to check the boost and the presure membrane of the dump valve.

Geplaatst: 21 mei 2008 19:43
door Herman
Deleted
Geplaatst: 23 mei 2008 11:23
door rapidos
As I am doing a lot of upgrades at the same time, I never know well the car when going on track. So it's quite uneasy to say if something is wrong. This time, I was faster by more than 4 sec per lap where I indeed have 22 bhp less... This preparation is "soft", it does not need any fuel modification. The turbo is still a OEM turbo (LEH). It seems it is a basic loss of air presure, somewhere. I just need to find it

The worst for me is losing time, as I need to go on my new light body...
Geplaatst: 26 mei 2008 5:45
door rapidos
Geplaatst: 04 jun 2008 20:51
door rapidos
Problem solved. It was ...the dump valve membrane...

Now it push well...

Geplaatst: 05 jun 2008 20:15
door Herman
Deleted
Geplaatst: 06 jun 2008 7:55
door rapidos
I will do it soon, but I can tell it push like never, so it works
What I found very strange is how a basic 2.0 GM without turbo and without Vtec can produce 245 BHP
Bon, c'est pas l'tout, mais maintenant qu'on a assez perdu de temps pour trouver pourquoi un vulgaire petit 2.0 GM non vtec et atmosphérique ne sortait que 245cv (il faudra qu'on m'explique...), on passe à la suite !
I am now going to install this turbo cooling system in order to decruise the engine bay temperature. This associated to the new CF body opended behind and without boot. But unfortunately, this is quite heavy...
I will weight it before fitting it:
After a full month of hard search, I found it !

I will fit it at the same time with the front CF body and I will clean of all the heavy stuff. Extra weight foreseen: - 4,68kg

Geplaatst: 06 jun 2008 9:45
door Exmantaa
rapidos schreef:
What I found very strange is how a basic 2.0 GM without turbo and without Vtec can produce 245 BHP
Bon, c'est pas l'tout, mais maintenant qu'on a assez perdu de temps pour trouver pourquoi un vulgaire petit 2.0 GM non vtec et atmosphérique ne sortait que 245cv (il faudra qu'on m'explique...), on passe à la suite !
Which GM engine with 245BHP do you mean? If you're talking about the "old" C20XE 2.0 16V engine, that is possible with extensive mods. (Tuned for throttle bodies etc.)
But in standard form it was 150BHP...
Geplaatst: 06 jun 2008 10:45
door rapidos
It's a standard 2.0 Z20LET (except balancing shafts removed) but without turbo !
Geplaatst: 06 jun 2008 12:31
door Exmantaa
Was a standard Z20LET engine, as found in the speedster turbo, not rated at 205BHP or something?
I think that without turbo this should be more like 145BHP then, but even that number is already very unlikely for the low compression Z20LET engine... (Balance shaft removal is said to bring 5-10 BHP)