• Hi Guest, welcome to TCG 2.0. Please refer to the FAQ in User Support before you do anything else. It will make the transition MUCH easier.

    IF YOU ARE SEEING AN "OOPS" ERROR PAGE, IT IS LIKELY BECAUSE YOUR BROWSER HAS NOT UPDATED YOUR CACHE. YOU CAN EITHER CLICK FORUMS AT THE TOP LEFT OR VISIT THECHICAGOGARAGE.COM AND BOOKMARK THAT. - Love, Mook

ICCU and Timing on Scanner

J.E.T.

Well-known member
Joined
Nov 10, 2008
Messages
1,319
Reaction score
0
Quick question.

On the ICCU (race unit if that matters) feature on increasing timing - does the added timing show correctly in the ODBII scan? So lets say the PCM has a max WOT timing of 18deg and the ICCU is set to add +2deg. Will the real time OBDII screen scan show 20deg ?

In my old MAFT+ setup, the timing total does not correctly show on the scanner because of the way the signal is intercepted.

J.E.T.
 

J.E.T.

Well-known member
Joined
Nov 10, 2008
Messages
1,319
Reaction score
0
Excellent. Thank you both for the info.

Now, at what point in timing advance total at WOT is considered 'safe'? About 23deg? I don't want to keep adding timing (even though 0 KR) and end up with a pile of molten metal! What kind of timing are you guys running?

J.E.T.
 

J.E.T.

Well-known member
Joined
Nov 10, 2008
Messages
1,319
Reaction score
0
And whats with the dang avitar? I changed it days ago and it reverted back to the old - and it's all squished.
 

BumpinGTP

Well-known member
Joined
Jan 20, 2009
Messages
4,208
Reaction score
0
Location
South Suburbs
the max i have run is 24*, but i know of others that have run up to 28*, not sure if its safe, but it has been done, i do know that the 24* that i run is safe though
 
I

imported_snoop

Guest
Originally posted by BumpinGTP@Aug 17 2004, 12:36 AM
the max i have run is 24*, but i know of others that have run up to 28*, not sure if its safe, but it has been done, i do know that the 24* that i run is safe though
didnt you spin a bearing. so how is 23* safe. that sounds like too much timing right there to me.
 

J.E.T.

Well-known member
Joined
Nov 10, 2008
Messages
1,319
Reaction score
0
Right now I have peaked 20deg at WOT. This is with +6 4500RPM then gradually decreasing timing ending with +3 at 6000RPM. From my readings, it's common practice to bump up timing at the low RPMS then gradually tapper it at higher RPMS. Is this method a practice in our GTPs?

I have read at ClubGP having success with 28deg advance. I would be afraid.

J.E.T.
 
I

imported_Ron Vogel

Guest
I would never take a stock bottom end to anything more than 18-19 degrees max. Don't mean to rain on anyone's parade, but you just can't keep adding timing even if you have no knock, that's how stuff gets broke. I've had naturally asperated motors using much more timing, but in a heavy automatic car (especially a supercharged one) you're physically limited by the timing you can run. You may be able to run up a higher timing number by installing the cam a bit retarded, but you need gearing for that.
 

BumpinGTP

Well-known member
Joined
Jan 20, 2009
Messages
4,208
Reaction score
0
Location
South Suburbs
From my readings, it's common practice to bump up timing at the low RPMS then gradually tapper it at higher RPMS. Is this method a practice in our GTPs?
i usually add the same amount of timing across the board, except over 6500 rpm, where i drop it 2* below what i set everything else at, i do this because my shifts are at 6800 rpm.
 

CoolGTX

let sleeping dogs lie
Joined
Nov 17, 2008
Messages
3,241
Reaction score
0
Location
Hotel 4 Dogs
Ive only taken it to 18 twice, and not even for a whole pass. I will try some new things when I hit the track for GPG practice.. :ph34r:

what would be a safe max for say...cam, headers, 11-12 PSI, INTERCOOLED, 103 plugs, mini afc, 920 O2s.
 

J.E.T.

Well-known member
Joined
Nov 10, 2008
Messages
1,319
Reaction score
0
Excellent question CoolGTX. Add gearing to that list. You've got at least 3.29, dont you J/O?

I guess a national survey would be good to see how much timing is being added. Thats a good warning Ron, thanks.

J.E.T.
 

CoolGTX

let sleeping dogs lie
Joined
Nov 17, 2008
Messages
3,241
Reaction score
0
Location
Hotel 4 Dogs
Originally posted by J.E.T.@Aug 19 2004, 05:02 PM
Excellent question CoolGTX. Add gearing to that list. You've got at least 3.29, dont you J/O?

I guess a national survey would be good to see how much timing is being added. Thats a good warning Ron, thanks.

J.E.T.
yes, ive also got 329 gearing and 300 stall now to add.....didnt think it mattered ;)

shifting at 6K
 

iliveonnitro

Well-known member
Joined
Nov 11, 2008
Messages
1,036
Reaction score
0
Location
Schaumburg, IL
My timing averages about 28* and often hits in the 30-31 range. ICCU is set up at +4 up to 6000rpm, and +3 at 6500+. My shifts are a touch over 6500rpm.

I'm naturally aspirated with no knock.
 
I

imported_Ron Vogel

Guest
Naturally asperated you can run a lot more timing. 24-28 is the average range for a well tuned NA car. With vac advance (don't know what they call it on the computer cars) should be about 36 total. The rule of thumb is to set the timing back 1 degree with every lb of boost, but that was before a lot of the good electronics came out allowing a hotter spark.
 

Create an account or login to comment

You must be a member in order to leave a comment

Create account

Create an account on our community. It's easy!

Log in

Already have an account? Log in here.

Top Bottom