505OUTLAWZWS6

iTrader: (13)

Like the title says, how much timing are you using down low to spool a large turbo?

green94z

iTrader: (6)

what kinda gas compression and cubes are we talking?

505OUTLAWZWS6

iTrader: (13)

Stock cube, stock compresssion.....E-85

green94z

iTrader: (6)

how big 88?

505OUTLAWZWS6

iTrader: (13)

Yup pt88, was fine at sea level, not so good at 7000da... I have my timing around 20-22 between 2000-3800, two step set at 4000

505OUTLAWZWS6

iTrader: (13)

What can I go up to safely or realistically?

onfire

iTrader: (17)

Which efi system? With BS3 you have a 2 step timing function...I have used 40 degrees in the past on the step without any problems at 4500Ft DA

505OUTLAWZWS6

iTrader: (13)

Stock computer with hp tuners, so I don't have that option. I do have the msd 2step. Just trying to figure out how much more timing I can throw at it and it is still a street car...

98Z28CobraKiller

iTrader: (17)

Are you able to get on the 2 step? Or are you having a problem stalling up to it with the converter?

505OUTLAWZWS6

iTrader: (13)

I am able to get on the 2step. It just takes about 1.5-2.0 seconds too long.

Phil99vette

iTrader: (11)

add timing until it stops spooling faster...upwards of 40 degrees.

505OUTLAWZWS6

iTrader: (13)

Will i have any issues driving it on the street with that much timing? In other words will it harm it or cause detonation?

Phil99vette

iTrader: (11)

I'd have a tuneup I use at the track only if you dont have an ECU that will work with a 2/3 step and higher timing values.

stock48

iTrader: (17)

Thats why I wa asking you about spool up a while back. Unless racing at altitude people are not going to understand the effect of 7000' DA let alone 10,000' DA has on spool up, and power. The difference between 4500~5500' is huge. My PT88/365'' takes 4~5 sec to hit 4K RPM, and 8psi on the foot brake no 2 step. I'm at 7000'/9500DA, 20*. What cam, and converter are you running?

tomz28

iTrader: (20)

you know i going to the shop right now to data log my car ont he 2-step and see what it is running for timimng. 2-step in the shop=kick ***

98Z28CobraKiller

iTrader: (17)

Let's say that you can get right up on the 2 step @ 4K RPM and it has a 50 RPM spread. So you are only "popping between 3-4 cells on your RPM axis. It's probably already at 1 or 2 PSI so that's 110-120 KPA and it climbs as the boost builds to lets say 155 KPA. So that's the block that you raise timing in. You will likely never hit any of those cells while driving or even racing on the street.

JAX04

iTrader: (17)

Good info in here guys!

Subscribing for more info!

slow67

iTrader: (2)

I've heard you can use the idle in drive timing table....be sure and set the min TPS to 100% throttle (and now only the speed determines idle or main spark table). Haven't tried it myself yet though.

Edit: If you have a T56 tune (since your a th400) you should be able to use the idle in park spark table. It will be the ONLY time your motor will be moving that much air at 0 mph.

tomz28

iTrader: (20)

im at about 20degs. but like killer said you will never be in that area of the timing table driving the car. im going to start adding timing in some places and see what happens

JAX04

iTrader: (17)

How did you do?? any improvements noteworthy?