Volkswagen Mark IV Forum banner
1 - 17 of 17 Posts

·
Registered
Joined
·
345 Posts
Discussion Starter · #1 ·
Hey guys,just need some adive on me maf. Just done the 3rd gear test using vag com. Got the following results.

Posted Image


My motor is a 1.8T, Revo'd, Forge DV, 76k miles, and a tiny bit down on power. Im guessing this is the problem!

Do i spend ?70 on a new one or is it worth tryin one from a breakers (cos im skint!)
 

·
Registered
Joined
·
345 Posts
Discussion Starter · #5 ·
Check this out. Imported the data i gathered from the VAG COM log into the format which the software we use in work to analyse the race car uses, then plotted a X/Y graph, same results but more detailed.

Posted Image


Interesting to note that peak is only 102 from a car which is suppose to be close to 180bhp. Thats a hell of a lot of power loss
 

·
Registered
Joined
·
7,208 Posts
I think you guys need to smooth your stock airboxes, run an 80mm intake feed and replace the filter with a Green Cotton panel filter!

Posted Image
 

·
Registered
Joined
·
287 Posts
Gary,

I've smoothed my air box and tried to run pipe last weekend, but there didn't seem to be room round the battery and downwards. And what looks like the horn is in the way by the airvent... Any ideas?
 

·
Registered
Joined
·
539 Posts
Using VAG-COM;

1. engine block

2. measuring block group 2 or 3

3. Log the data to a file

4. Go to a long flat straight bit of road.

5. I used 2nd gear, foot to the floor until you dare not rev it higher!

6. Graph it using Excel...

You may get better results using 4th gear, but you need a private runway and a lot of bottle to log this!!
 

·
Registered
Joined
·
7,208 Posts
Quote: posted by Malky on 11/03/2005 11:39:29

lol at Gary M,

What speed were you pulling at 7K in 4th Gear!!!

On a private runway of course!!

I have a 6sp box so its not as bad as you imagine [:D]
 

·
Registered
Joined
·
7,208 Posts
Quote: posted by Paul_Christy on 11/03/2005 16:27:13

Gary,

I've smoothed my air box and tried to run pipe last weekend, but there didn't seem to be room round the battery and downwards. And what looks like the horn is in the way by the airvent... Any ideas?

Did you remove everything from the old intake including the black plastic thing at the rear of the headlight?

I didnt have a problem getting an 80mm flexible pipe down behind it but it was tight.

To get to the airvent I had to bend and twist the brackets slightly for the horn.
 
1 - 17 of 17 Posts
Top