New build coming need to learn the $6E mask

[96lt4c4]

I am going to be building a stout 408 SBC, roller cam, 190cc aluminum heads, Holley Stealth Ram, going into a 89 IROC with the stock 305 in it. The car should be running the $6E mask which I am not very familer with. Just taking a quick glance through the stock 350 TPI bin I do not see any VE tables. So, does the MAF do all the fueling for this mask? I downloaded the extended spark .xdf. I did a little reasearch on LV8 and think I sort of understand that. I know that the conversion to $0D started over at Thirdgen.org. I really do not want to do that unless I have to. I would like to learn this mask if I can.

I do have some experience with the 91-92 Camaro speed density stuff If that would be easier.

[RobertISaar]

if you know 8D and like 8D, expect to use 8D, at least eventually if you get fed up with 6E.

6E is all MAF.

[dave w]

if you know 8D and like 8D, expect to use 8D, at least eventually if you get fed up with 6E.

6E is all MAF.

What he said x2

A few wire changes to the ECM connectors and a few wire changes under the hood, and $8D can easily be done.

dave w

[96lt4c4]

Ok, thanks. I was reading about the swap over at thirdgen, and saw an issue about the VSS. But, I also saw the fix for it, the VSS flag that needs to be turned off.

What about the VE and Spark tables only going to 5600 RPM? This engine should see 6000 for the cut off. Does the fueling and timing stay the same from 5600 up to 6000?

[dave w]

Ok, thanks. I was reading about the swap over at thirdgen, and saw an issue about the VSS. But, I also saw the fix for it, the VSS flag that needs to be turned off.

What about the VE and Spark tables only going to 5600 RPM? This engine should see 6000 for the cut off. Does the fueling and timing stay the same from 5600 up to 6000?

I'm thinking the attached .xdf will allow 6400 RPM.

dave w

[96lt4c4]

I'm thinking the attached .xdf will allow 6400 RPM.

dave w

Just took a glance, does not look like it. I will look through the hack if I can find it.

[96lt4c4]

Just looked at the hack, only goes to 5600

[dave w]

Maybe this attached .ecu file?

dave w

[96lt4c4]

Nope, looks like 5600 is all it goes too.

[dave w]

Nope, looks like 5600 is all it goes too.

Ok, I'm thinking VE is 6400, your posting SA to 5600.

dave w

[EagleMark]

S_AUJP goes to 6400 RPM...

[dave w]

S_AUJP goes to 6400 RPM...

Is the attached .xdf the S_AUJP to 6400 RPM?

dave w

[96lt4c4]

Spark advance still only goes to 5600, VE does go to 6400.

[EagleMark]

Hope your not trying to add spark at that point...

[RobertISaar]

it's possible to make the SA table go to 6400 as well..... but i really don't see much benefit from it.

[96lt4c4]

Hope your not trying to add spark at that point...

No, I am not. Just wondering what happens when the engine goes beyond 5600 RPM, say to 6000.

The engine will have reached total timing before 5600, my question is will it hold it to 6000?

[RobertISaar]

when you hit 5601 RPM, the engine will explode. :D

no, what will happen is that when you exceed the table's value in either MAP or RPM(though you won't be exceeding MAP, just for example), what will hapen is that the lookup routine will apply the highest value(5600 in this case) at whatever MAP is appropriate(let's say you see 95kPa at 6000), and you'll end up with the advance that you see at 5600RPM, 95kPa.

[96lt4c4]

when you hit 5601 RPM, the engine will explode. :D

no, what will happen is that when you exceed the table's value in either MAP or RPM(though you won't be exceeding MAP, just for example), what will hapen is that the lookup routine will apply the highest value(5600 in this case) at whatever MAP is appropriate(let's say you see 95kPa at 6000), and you'll end up with the advance that you see at 5600RPM, 95kPa.

Thanks, thats what I was wanting to know. I have not had this issue come up yet so I was just wondering.

Looks like the guy may be going LT1 swap anyway, so none of this may even matter. He changes his mind every day on what he wants to do to repower the car.

[93chevytbi]

He changes his mind every day on what he wants to do to repower the car.

this sounds familiar, hmmmmmm

[Dewayne_S]

Don't worry about 6E or the MAF. I have seen so many people switch to SD because of the flow limit of the MAF. I took the actual sensor out of the plastic housing and mounted it into a piece of 4" aluminum thin wall pipe. I also run a Stealth Ram but only have 383ci. engine. As for RPMs, just because the tables run out of numbers doesn't mean the the engine will stop gaining. I have turned 6500+ with other smaller ci engines, My current engine struggles to get past 6000 due to my injectors are too small.

[96lt4c4]

Don't worry about 6E or the MAF. I have seen so many people switch to SD because of the flow limit of the MAF. I took the actual sensor out of the plastic housing and mounted it into a piece of 4" aluminum thin wall pipe. I also run a Stealth Ram but only have 383ci. engine. As for RPMs, just because the tables run out of numbers doesn't mean the the engine will stop gaining. I have turned 6500+ with other smaller ci engines, My current engine struggles to get past 6000 due to my injectors are too small.

Cool thanks, I will keep that in mind. Still trying to figure out what we are going to put in the car. I am trying to talk him into a 5.3 LS now.....