I was just reading Dynotune's instructions on their site and they state:

Ignition timing should be retarded approximately 2 degrees per 50 hp
above a 100hp increase. So at 150hp total increase use 2 degrees additional retard.

Huh? Only 2 degrees pulled for a 150 shot? And none for a 100?

It also says under their baseline tuning section of the instructions:

Using an octane booster may eliminate the need for timing retard at 150hp levels and higher. 125HP will not require any timing retard, just try and use 92-93 octane. LS engines use knock sensors so if it senses any pinging/detonation, the computer will retard the timing for you!

This doesn't seem to be the way to do things from what I have been reading on this site...

 

For 150 you should be pulling about 6 degrees. Octain booster is not a replacement for the need to pull timing. That is a statement alot of the nitrous companies make I completely disagree with.

Dave

 

WTF.... this is the first I have heard of this

 

Check section 3 and 5 of this manual.

Dynotune instructions

 

There's a reason for that.... All that s*!+ is completely wrong!

There is NO WAY you should only pull 2* for a 150 shot, or rely on the knock sensors to pull timing, or trust some octane booster as a replacement for proper timing retard.....

 

Agreed

 

Thanks ryar and chris. It is information like this that can have people who aren't too sure about nitrous (like me) to blow up an engine.

 

I wonder if the instructions are assuming you are on stock timing..

 

Hey sarge. I would definitely not follow any of that.

I would pull 7*'s out and see where the plugs are. If you need help looking at them you can always email me pics.

Btw. We were out of your size in the black shirts so it didnt get sent till today. Like that sig tho sir. Thanks for the support.

 

Fwiw I wouldn't follow it either, I just wonder what they are basing that info off of, I can not for the life of me imagine that it's based off of max performance n/a timing that's for SURE.

 

LOL!!! What they really meant is to spray the car, see what the KR is, and subtract that number +2deg from the base timing...

Crazy

 

Ugh. I'm glad I've never actually seen that.

 

The way I read what you bolded is, 2 per 50 PLUS 2 more over 100, so for a 150 shot you'd pull at least 8 degrees. 2 per 50 x 3 is 6, then 2 more for over 100 so a total of 8.

 

Nah.... Their instructions are saying you don't need to retard the timing AT ALL for anything less than 150....

Completely wrong.... Wow

 

Yeah I put this out there to draw attention the amount of wrong information being distributed. I would never run a 150 shot and only pull 2 degrees. Hell I would never run a 100 shot on a stock tune either.

Currently my WOT spark cells are 27-28 degrees. Pop goes the engine with 2 degrees pulled. I may start with pulling 7-8 and adjust up if plugs determine that to be the need.

 

100 shot on stock tune should be fine. Hell I never had any issues with a 100 shot on my car. I've got a 150 on mine and no timing or anything is pulled.

 

Just because it has worked for you and others doesn't mean it's the right way to approach nitrous tuning....

It's kind of like robbing banks as a source of income... Some people get away with it and make a fortune... It costs everyone else a lot to recover from!

 

What's a good address to email you pics at. I will most likely be using my camera phone to send the pics from the track.

Oh, never did get the shirt. Maybe UPS guy wanted it... He always says when he sees big *** tires on his truck he knows he's coming to my house...