Adjusting PE for high volume intake(flow)?
Thread Starter
Teching In
Joined: May 2005
Posts: 16
Likes: 0
From: Los Angeles, cali
Adjusting PE for high volume intake(flow)? This is the situation, 427 large cam 236 240 blower 6-8lbs boost. VE tables are set up for NA without boost. PE table is set up for a rich AFR 10.3-11.0 from 4500 rpm to 6500 rpm.
If WOT enable is set a TPS 23% at 4800 rpm when the car is in N/Park at 4800 rpms actual TPS is 27-33% which leads to AFR <9.0 and the spark gets blown out. Drop the rpm a tad and the engine is reborn.
Now change the TPS enable WOT to 35% above 4800rpm and the engine revs fine without a mis.
This is on a 98 vette A4 3400stall making 750-800 at the fly wheel at 6500rpm.
The prim VE table has two rows 100 and 105 kpa which are less than 100% throughout the rpm range.
???
Can you increase the VE to levels greater than 100% at 105kpa say above 3800 rpm and in turn decrease the PE values so that in PE mode under light throttle the engine does not flood???
If WOT enable is set a TPS 23% at 4800 rpm when the car is in N/Park at 4800 rpms actual TPS is 27-33% which leads to AFR <9.0 and the spark gets blown out. Drop the rpm a tad and the engine is reborn.
Now change the TPS enable WOT to 35% above 4800rpm and the engine revs fine without a mis.
This is on a 98 vette A4 3400stall making 750-800 at the fly wheel at 6500rpm.
The prim VE table has two rows 100 and 105 kpa which are less than 100% throughout the rpm range.
???
Can you increase the VE to levels greater than 100% at 105kpa say above 3800 rpm and in turn decrease the PE values so that in PE mode under light throttle the engine does not flood???
Thread Starter
Teching In
Joined: May 2005
Posts: 16
Likes: 0
From: Los Angeles, cali
Another way of asking the question is, If the VE table changes the amount of fueling during PE mode once the MAF is max'ed out????
IE, ve 5000 rpm 105 line = 100% vs 120% leading to PE at 5000rpm going from 1.224 to 1.105??? and still have the same AFR 12.0.
IE, ve 5000 rpm 105 line = 100% vs 120% leading to PE at 5000rpm going from 1.224 to 1.105??? and still have the same AFR 12.0.
