total Timing
Thread Starter
Melting Slicks
Joined: Oct 2005
Posts: 2,877
Likes: 9
From: Ottawa Ontario
total Timing
Hey guys
What are you blower guys running for total timing in the car. I have HP Tuners Software and am going to the dyno next Thursday and am looking for some ranges and whatnot.
thanks
What are you blower guys running for total timing in the car. I have HP Tuners Software and am going to the dyno next Thursday and am looking for some ranges and whatnot.
thanks
Melting Slicks
Joined: Mar 2002
Posts: 2,931
Likes: 2
From: Tx
Originally Posted by MotleyDrew
Hey guys
What are you blower guys running for total timing in the car. I have HP Tuners Software and am going to the dyno next Thursday and am looking for some ranges and whatnot.
thanks
What are you blower guys running for total timing in the car. I have HP Tuners Software and am going to the dyno next Thursday and am looking for some ranges and whatnot.
thanks
Thread Starter
Melting Slicks
Joined: Oct 2005
Posts: 2,877
Likes: 9
From: Ottawa Ontario
Originally Posted by QuickSilver2002
The tools work in terms of advance (not total). Anyway, 14-22 is the range most people run. 17 is probably the norm. You just have to see what it likes.
Cool. I was a mustang guy so we dealt alot in total timing numbers because the factory computer added 16 degree to your base timing in those cars.
So a blower running 5.5 -6.5 lbs of boost on a stock LS6 motor with headers should be in the 14 - 18 degrees advanced range?
thanks
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
I am at 13 degrees. Nice and safe. Anything more than 14 is pushing it IMO. You may not be getting any KR on the dyno or on a mild day but when the weather gets hot and muggy or nice and cold you would be more prone to knock.
Melting Slicks
Joined: Mar 2005
Posts: 2,252
Likes: 181
From: NE OH
It's going to depend allot on your dynamic compression, boost and IATs. If you are running tuners, I'd start by zero'ing out the IAT advance table that way you are dealing with only one variable. Shoot for a fat AFR to start with, say low 11's. Copy the high octane table to the low, and then start easy, say 13* or so. Go up in increments of 2* until you get KR. At this point you can either back off the timing or increase the AFR to see if there are any gains to be had. Don't forget to add the IAT timing back in at the end, for safety's sake.
I recently dyno'd my ride to test out some LS6 heads (10.5:1 CR). I was able to run 18* of timing @~5PSI of boost without KR. My AFR at this point was 11.00. Keeping the same timing and increasing the AFR to 11.75 resulted in ~2* of KR, a little more torque, but no significant HP increase.
I recently dyno'd my ride to test out some LS6 heads (10.5:1 CR). I was able to run 18* of timing @~5PSI of boost without KR. My AFR at this point was 11.00. Keeping the same timing and increasing the AFR to 11.75 resulted in ~2* of KR, a little more torque, but no significant HP increase.
Safety Car
Joined: Jul 2005
Posts: 4,275
Likes: 4
From: Vancouver WA
Originally Posted by muncie21
It's going to depend allot on your dynamic compression, boost and IATs. If you are running tuners, I'd start by zero'ing out the IAT advance table that way you are dealing with only one variable. Shoot for a fat AFR to start with, say low 11's. Copy the high octane table to the low, and then start easy, say 13* or so. Go up in increments of 2* until you get KR. At this point you can either back off the timing or increase the AFR to see if there are any gains to be had. Don't forget to add the IAT timing back in at the end, for safety's sake.
I recently dyno'd my ride to test out some LS6 heads (10.5:1 CR). I was able to run 18* of timing @~5PSI of boost without KR. My AFR at this point was 11.00. Keeping the same timing and increasing the AFR to 11.75 resulted in ~2* of KR, a little more torque, but no significant HP increase.
I recently dyno'd my ride to test out some LS6 heads (10.5:1 CR). I was able to run 18* of timing @~5PSI of boost without KR. My AFR at this point was 11.00. Keeping the same timing and increasing the AFR to 11.75 resulted in ~2* of KR, a little more torque, but no significant HP increase.
Good example. 
Your timing should be set to where it makes maximum HP. But with pump gas, you will probably experience knock before you reach that point though. So if Joe Bob is running his at 18 degrees advance, I WOULD NOT set mine to 18 just because he can run it. Too many varibles to determine what the engine can run. Fuel and compression is the biggest factor. So you will have to start low, and work your way up and monitor your readings. Good luck. 
Burning Brakes
Joined: Feb 2004
Posts: 1,069
Likes: 8
From: Sanford NC
On mine as soon as it hits boost the timing is reduced to 17* then scaled back to 15* by 6,000. We have tried up to 17* but the car didn't pick up any thing. Mabey a couple lbs of tq. So we just backed it off untill it started to loose power. This held true at 6psi and 10psi. The funny thing is that the scanner only sees 14.5*. But like others have said, once the IAT table kicks in the timing takes a crap along with your power. I guess Meth is the only answer for that.
My question is, do you guys scale your timing back as boost increases? Or do you set it at a certin amount when boost hit's and leave it there? It seems to me that you could just decrease it 1* for every lb of boost from N/A and be all right.
Brett
My question is, do you guys scale your timing back as boost increases? Or do you set it at a certin amount when boost hit's and leave it there? It seems to me that you could just decrease it 1* for every lb of boost from N/A and be all right.
Brett
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Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Can anyone e-mail me a HPtuners file for a supercharged car. Just like to see what the curve looks like thanks
Detentionizover@yahoo.com
Detentionizover@yahoo.com
Thread Starter
Melting Slicks
Joined: Oct 2005
Posts: 2,877
Likes: 9
From: Ottawa Ontario
Originally Posted by SpinMonster
Can anyone e-mail me a HPtuners file for a supercharged car. Just like to see what the curve looks like thanks
Detentionizover@yahoo.com
Detentionizover@yahoo.com
I will take one too ! My motor is stock with a Vortech Blower and full exhaust.
drewcameron@rogers.com
thanks
Melting Slicks
Joined: Mar 2005
Posts: 2,252
Likes: 181
From: NE OH
