if i was near my computer... id show you my big turbo/cosi/meth timing map... if i remember later i will post it

 

They usually end up looking the same as far as timing goes for the same level of boost on the same fuel. The most I have had to take out is 3-4* on standard pump fuel, but the rest of the map will look the same.

 

Let us say the car has a GT35R. That turbo would go into full spool up around 5000 rpm. So shouldn't the tuner run the least amount of timing at that peak spool-up point? With a stock trubo peak spool comes at 3500-3700 rpm and the least amount of timing advance is reflected in that rpm. Wouldn't a similar method apply to a big turbo?

 

I run 6* at peak boost ramping to 14* at 7500 on my map. In logging it shows that I will occosionallly only hit 13 and get a couple of counts above 7700.

Im running 24-25 lbs depending on how the MBC feels.

 

Thats why I said for the same boost and fuel not RPM

Yes where the timing is definitely changes, the amount seem to be about the same depending on how noisy the turbo is. Some kits seem to make enough harmonics that the engine picks it up as knock and why I mentioned the timing being lower from time to time.

2 VIII's we did-

On pumpgas for instance the ETS 61mm kit that we just did for Monty was 2* at peak boost and 10-11* out the top on 272s at 24psi.

I did a 57 trim 4 days after that and peak boost was 25 on pumpgas, stock cams, 92 octane 11.5:1 AFR, and I ran 2*-3* at peak boost and 13* out the top. On this car I probably could have pushed it more but the gas map is the "emergency" only map since the car is primarily an E85 car. On E85 the timing drops at peak boost (28psi) to 0-1* and then ramps pretty hard to about 18* out the top. In that trim it made 440whp.

 

I forgot i had this in my photobucket...

Here is my 35ish cosi cams meth all bolt ons

 

lol happy now? i removed my crappy novicely tuned maps.

 

Here is my latest.

RC1000cc (moving to E85 here soon)
FPgreen
29psi peak, 24psi up top
100oct
11.6-11.4 AFR
Cruise at 15.6 AFR

 

Curious to know how much timing do you guys run transiting between vacuum and 3 to 5 PSI of boost....

 

^Look at the load cells from 60 to about 120ish.... that is generally the the transition between vacuum and boost....

 

i need to learn
tunning class hehe

 

what does the differnt shades of colors mean

 

Just the color scheme of the tables. You can change the default colors in ecuflash. Nothing more than to make it look pretty.

 

??

 

Low timing and enough fuel, dialed in correctly for your configuration, can result in increased boost at the line and mid-shift (with NLTS), yes. The effect will generally be much more dramatic (and useful) at launch.

It also shoots flames.