I always thought the risk of bov on maf cars is that the air being let out is already measured and the dme calculates the fuel as if that air was included.

I thought that's why you end up rich.

 

That is why. I don't think letting the air out faster is a solution...

 

Good to hear. Let's look at a new log again. This will tell everything.

 

it is also possible your car is fine but you are suffering the automotive equivalent of "Münchausen syndrome" lol

 

And 20" wheels.......

 

No i can vouch on that my 18s and 19s spun way worst when i had just 16gs. Another to remember im already around in the range of 550whp at just 1.1 bars i dont know if Tony will let me go higher i will probably do injectors next so i can max these turbos out.

 

Not sure how since 18" & 19" tires will have more sidewall,
therefore,more rubber between the rim & the ground to flex before spinning. The larger the rims the smaller amount of tire sidewall the greater chance of spinning(e.g. 20" rims)

Or you have old tires which have hardened over time & are less effective.

 

I am sure your right at that. 20s just seem nicer lol I might get a set of 19s again.


For everyone helping thanks so much this was not easy just old vacuum hoses busting lol.

 

An 18" wheel with a larger diameter tire like a 305/35/18 (26.4") will provide optimum performance. A 19" with a 305/30/19 (26.3") is not quite as good but decent. 20" wheels will be worse due to the limited sidewall height and heavy wheel mass. Look at Cup cars. There is a reason they run 18s with relatively skinny but tall tires, even taller in the rear.

Out of curiosity, I had the car out today and while on the hwy I grabbed my iPhone and took a video of the tachometer to see where my turbos are boosting at relative to RPM. This is easy to do in 5th if you start at 2500 and just mash the gas. I let up at about 4000rpm which takes you to just a shade over 100mph to keep things safe. I looked at the video frame by frame on the iPhone and this is what I get on RUF K24s:

2600 0.2bar
2800 0.4bar
3000 0.6bar
3200 0.9bar
3500 1.3bar

Past 3500 it stays at 1.3 bar. Can you do this so we can get an idea of the performance of your K16? Like I said, do it in 5th. 3rd or 4th is useless as everything happens too fast and the gauge can't keep up.

 

i also noticed you're "rollin on 20's" ( lol sorry ) how's the wheel hop with those? i'd ask "why"? but you seem to know what youre doing ..and yeah..all of our cars are running better the last few weeks i would imagine. mine sure is


are you saying your car doesn't boost? at all.. or hit FULL boost until 3500 ?? /confused

 

Third gear fully boost right about there 4th is a little higher like 3900 and not really any wheel hop sometimes spin in second.

 

seems well within acceptable range(s). sounds like you've got it sussed!

 

I think so lol the power is unreal it hits so hard one little intake leak i need to take care of. I will do some more videos.

 

There you go:

http://www.youtube.com/watch?v=PKmsH...ature=youtu.be

I am boosting at 1.3bar at 3500 rpm in 5th gear with K24 hybrids. You say you are at 1.1bar full boost at 3900 in 4th gear with K16 billets? I would love to see a video of your car in 5th starting at 2500 rpm. I'd say something is not right. K16/hybrids/16g/billets/whatever should be boosting quicker than K24s unless you have restrictive intake piping, exhaust, or some other issue.

 

Topspeed said the car is running perfectly when they drove it and boosting exactly where its supposed too. Ill take a video maybe today its real cold out right now.