Astra Coupe Turbo 273bhp, but 25bhp less power with WI.

[Richard L]

Originally Posted by ashtal

Good luck with the R/R setup. Finally got the car mapped the other day. It hit 267bhp, theres some kind of restriction in the exhaust ! :sad:

With or without WI?

By thursday next week, I should learn a great deal more on the Astra. Hope I can gain some new power. The only tool I have a trimming the MAF. We shall see.

[Richard L]

Originally Posted by MikeWarner

Sounds good to me. I'll be leaving work at 12:00.

So far so good.

[ashtal]

Originally Posted by Richard L

With or without WI?

By thursday next week, I should learn a great deal more on the Astra. Hope I can gain some new power. The only tool I have a trimming the MAF. We shall see.

Without.

The WI is not fully installed yet. Had to hold my horses cause the cash spent on the R/R. But its ok now. will phone next week to order the rest of the parts needed and hopefully install it all next weekend.

[ashtal]

Originally Posted by Richard L

Mike,

I have asked for Wednesday week (15th) is set for 2pm. We should have some fun.
Would you like to meet me earlier at ERL and may be get a bite of sandwich before setting off.

Richard

Well ....... ?

Sorry, im a little inpatient to find out the result !

[MikeWarner]

Not good power wise, although Richard has some before and afters to work on.

Take a wild stab at which sensor caused me to loose 30bhp (this is nothing to do with the WI btw).

[ashtal]

Originally Posted by MikeWarner

Not good power wise, although Richard has some before and afters to work on.

Take a wild stab at which sensor caused me to loose 30bhp (this is nothing to do with the WI btw).

AMM ! or the o2 sensor. Think one of my o2 sensors is out.

[MikeWarner]

Yep -AFM.

[Richard L]

Here is today's dyno run. Didn't have a chance to try the MAF converter since the afr is quite lean already at certain places.

The first run -base:


Second run -with 50M/50W 0.5mm jet:


Third run - abandoned midway due to leaning after replacing another MAF sensor:

[ashtal]

Thats a shame. The AFR line look quite erattic ! Was bhp figure at the wheels or flywheel ?

Was thinking, would it be possible to moniter the AMM like the lambda sensor ?

[Richard L]

Although the last plt was abandoned midway, it still made respectable power running at extremely lean condition (WI was switched on).

Unfortunately the bottom scale is not in RPM but scaled in seconds.

I did my best to superimpose the lean run on top of the baseline. After loosing some power during acceleration, it appeared we have picked up some power -only just. Lean plot is the fainter one.