Yes those are the easy ones to do..
How do you plan on taking care of short and long term fuel corrections, since you are in effect swapping one 'bank's' injector for the other 'bank's' injector?

You do follow what I have been saying here all along right?
If the swapped injectors were the same bank I don't see a problem... but they aren't?.. [4 and 7 are from different banks]
Say the left bank O2 senses 'lean' and richens injectors 2 4 6 8 you'd be richening one on the right bank.. [7, the one you swapped for 4.. This is going to upset the mixture in cyl 7, to 'too rich'] reverse would apply for 'rich condition [one cyl will be 'too lean', etc.]

As far as I know, each INJECTOR [pulse width] isn't controlled but each BANK is[someone correct me if this is wrong]
I suppose you could remain in 'open loop', but this would have to be addressed..

 

o2 sims my friend

 

I thought they are only for the rear O2's in 96-7's? Not 93-5 that have only 2 O2's..
You need O2 sensors to run the FI...
[that's why I suggested maybe you could force open loop and run off tables...]
Maybe a carb is the answer...

 

There isn't any real reason for one bank to run richer than the other, though. Optimally, the BLM's will stay at 128 on both banks all of the time.

When we screw around with the camshaft, the BLM's split, so the computer runs one bank richer than the other. Is the computer running one bank richer because the whole bank was lean? Or was 1 cylinder lean, so now you have 1 cylinder lean and 3 rich?

My point is that leaning or richening and entire bank is a shotgun approach anyway. So, one cylinder that gets the other banks correction isn't going to hurt anything.

Mike

 

the power gain can probably be attributed to the changes that it makes on the inake pulse tuning as well as some crank harmonics changing. as for the computer not being able to tune the swapped banks... speed density will work just fine... unless of course you have the money for fast. as for my input on the cam.. look in comps lobe catalog and read the .200 durations of the cams before you decide on some huge .050 duration cam ... then read about dcr... and then before you get too excited about every last bit of power look at the dynos and notice a lot of lt1 stuff seems to fall off not much past 6k some stuff makes 6500 but its getting rather large by then, 3" intake runners arent so hot for big cams. racing isnt about peak power its about avg power in the range you run down the track. theres a lot of info out there and a lot of ideas that need touched upon before you go looking into swapping the firing order if you want every last bit of power. but what do i know i'm just some guy from the middle of nowhere.

 

carbs are no challange

Hey look everyone he read the first page and know i am swaping the cam and not just playing with wires. Now where getting some where.

 

If you do this, you'll have to get a custom ground cam.

 

god #%^% read the first @#$ page .

 

Yes, so you definitely need to stay away from the high dollar Lunati "non-twist" forged cranks. . .

Mike

 

engineermike I think me and you are the only ones getting this.

 

I was just joking, I've been in this thread the whole time... but make sure you get a Lunati crank that is made last summer.

 

I agree 100% with WS6T3RROR. A well chosen cam with a proper DCR and quick ramp rates will net some significant gains over a "catalog cam". There's alot more to a cam than lift and duration. If you're trying to optimize the firing order, you should optimize other aspects also.

Believe it or not, I thought about doing this to my current 383/T-trim, but decided to concentrate on getting the machine work right, valve train set up properly, cam spec's right, fuel system, alot of cool boost, etc. . .

My cam is 224/236, 114 LSA, 0 adv, with .605"/.593" lift with 1.6/1.52 Pro Magnum rockers. I spent alot of time looking at advertised duration, duration at .050", duration at .200", and lift versus valve spring pressure.

And don't forget: you'll need a special cam for the 4/7 swap also.

Mike

 

that makes three people. Its a small world after all. I thought you were for really. I was starting to get pissed because people arent reading.

 

I don't get it.

 

this phrase is should be banned