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

Hi. I have a Mk4 Astra Coupe Turbo running 273bhp and 297lb.ft torque.

When I was on the rollers a few weeks back, we tried the car with and without WI (ERL 1s kit) and I lost around 25 to 30bhp at the top end of the revs. Lower revs seemed less effected, but as the revs rose, the losses increased.

I am running a single 0.5mm jet after the IC and I was running off standard washer fluid. The car over-boosts to 19.5psi and holds around 16psi.

If anyone can give me some advice on getting the most from the WI it would be much appreciated. Please note the car has not been mapped for WI and it is unlikely the I will do this in the future.

Here is the current power graph without WI. Cheers.
http://www.migweb.co.uk/gallery/data/516/medium/CS4.jpg

Hello Mike,

Thanks for posting your set up and hope that ywe can go forward from here and taking your car beyond 300 brakes.

I am not familiar with the Astra but as you are not too far away, I am willing to learn soemthineg from it and hope to be able help you tuning it.

I always hope a few Astra owners herecan chime in and help. Loosing 30 horses is no fun.

Richard

Thanks Richard. By the way, today I was visiting some Southern Water sites in Hampshire and I saw a couple of your ERL power supplier in some of the telemetry boxes. :)

I should be down lunchtime on Friday. If you could be around it would be great. I can't stay much more than half an hour though.

Thisis interesting, I didn;t realise we supply Power Supply Unit to Southern water authority.

Tell me the ETA on Friday so I make sure I am at the office to meet you.

Richard

Hi Richard. I'll be there for 12:15pm on Friday.

I took this photo of the power supply, it says ERL on it, so I assume it must be one of yours.
http://www.migweb.co.uk/temp/erl.jpg

Yes it is - Not using the un-interrupible function??? I will sue the company if my water is not pure during power cut periods.
:lol: :lol: :lol:

Anyone?

Hi Mike

I suspect that you might be injecting too much, too early.

You don't say at what boost pressure your WI is activated.
Also what do you inject? is it straight water?
Have you got a picture of the nozzle setup?

If your car is running rich while the WI operates, then it's normal to lose power, in my experience.

No photo, but it is mounted right after the IC and before a long straight section. The spary comes in at about 12 psi. I will be trying a 0.3mm jet soon.

One Friday, I see what I can do in 30 minutes to get to know the car a bit more.

I think timing and fuel adjustment is the key to your WI success. Just need to find a way to modify them without a special tool.

Possibly delve ino ther coolant sens0r and air temperture sensor and MAF sensor, the management is only as intelligent as the sensors.



Richard