CHRISPY

Just curious what rpm you guys are starting to ramp in your timing? On my car I have the following setup

4000-5000rpm 28 degrees
5000-6000rpm 29 degrees
6000-7000rpm 30 degrees

My question is what are you guys doing from 2500-4000rpm in terms of WOT timing advance?

I am at ~10.8:1 compression with a 230/230 112LSA XE-R cam.

Cheers,
Chris

Visceral

iTrader: (1)

I think that larger ci cars traditionally cant take the advance that HCI cars can. I believe that Jayson's (MTI) tune for me peaks at 23 degrees for my 388.

As soon as I pick up LS1Edit for this car, I'll go mess with it and see what I can do.

chris

Pro Stock John

iTrader: (34)

My 422ci was at 25/26 degrees of timing at peak, I had around 12:1 compression.

ls1290

iTrader: (20)

27 degree for that interval.

CHRISPY

How are you guys ramping in your timing below 4000rpm?

ie what increments from:
2000-3000rpm
3000-4000rpm

I can really notice the timing ramp up in my car.

It is like a small shot when it hits 4000rpm. I am not sure what my timing is for the above increments.

I am thinking it must be pretty soft to notice such a big power hit at 4K rpm

BTW at the last dyno my car made over 400RWTQ from 3600rpm and up and over 400RWHP from 5200rpm and up. (It is making even more now with the stock 10 bolt and DS back in the car vs the 12 bolt and heavy DS)

I am trying to fatten up the curve even more adn wanted to play with 2000-4000rpm timing increments without causing any ping.

Cheers and thanks,
Chris

Jorday

My car prety much runs 31 all the time when it's at WOT. I think less RPMs it's high 20

JeremyF

iTrader: (23)

The more efficient and more cyl head pressure the less timing the vehicle will need. So by that the larger CID vehicles will need less timing in certain areas because they make more torque in places where a 346 doesnt make as much. The 98 vs the 02 fbodies have drastically different timing curves the 02's have much less timing but make a significant amount more power off the showroom floor. Take for example the Z06 which only has 22-23 deg WOT timing and look at the power it is making. With a 12:1 Z06 and a medium size cam I did not have to retard any timing past 5600 but from 3600-5600 I had to retard a few degrees because of much greater efficiency and inc torque throughout that range.

Jeremy Formato

Phil99vette

iTrader: (11)

I am running 28 degrees of timing from 4k - 7k in my 347cid H & C motor. With 12.2:1 you would think it would knock but no knock on 93 octane......:crazy: I am going to try adding some more timing for some more HP!
Phillip

T/A Medic

iTrader: (1)

"LS1 Edit Dump of Table -- High Octane, Open TPS, Spark Table, Aiflow in Gms/Cyl vs RPM

Filename = C:\Program Files\Ls1_edit\M6Corvus\9-13-03.LS1

Timing Table

this is my timing table... i have no KR except in 6th when i floor it... which i had on stock timing.

CA 91 Octane Fuel and 90 degree temps

CHRISPY

That seems like a lot of timing! What are you dynoing? What are your mods?

thanks,
Chris

Mike TexaSS

iTrader: (2)

Ditto! How are you running this much timing?