Well guys I got a little excited tonight, I've had my 350 laying around for a while because the mechanic that was going to put it in has been jerkin' me around but I think I have a new guy now that will be willing to put it in soon.

So...here's my question. The 350 is a stock iron headed L98 with everything in my sig. For the timing tables would I be best to just modify my stock tables or the ANLU tables or do you guys think it would be wise to use say an ANLU bin but throw in the timing table from a stock L98's bin?

This idea just came to mind but I'm not sure how the two ecm's even relate and if this is possible or if the TPI would give that bin much different tables than a TBI car. I also think the TPI tables would be quite a bit more aggressive than the caprice table. Throw some ideas out here.

 

If the cam is like the l98 roller then go for it. Also try and minimize the other tables and set everything up identical or as close as possible. That would be a good start.
You might also want to turn off EGR when you start tuning so as not to mess up your VE tables. Without EGR you'll have an easier time.

 

I used the tpi tables as a base for my present timing, mainly because they have a good ammount of timing at the lower map values, which really helps with a low compression 350. One thing thats different with the tpi's is the fact that the tuned port system's timing requirements are a bit different. It has quite a bit of timing at the mid portions of the table and because the tuned port intake helps to generate alot of cylinder pressure at WOT in the midrange rpms, there isnt all that much WOT timing. One thing that i found is that the portion that I used had a bit too much timing at p/t cruise and id get a fair ammount of knock counts. At wot there wasnt enough timing and the engine would bog down. Just a few things to take into consideration if you try to use a section of the tpi timing curve in your bin.

As for entering the timing table, youll need to do it manually in an editor. The tpi timing curve extends a bit further then ours so youll only be able to use the lower portion of it. I have the curve saved somewhere and later Ill post it if youd like.

 

Thanks for the replies, the cam is the stock L98 roller cam I'm going to keep it stock for now and get it all tuned up then later on maybe swap cams. I'll be sure to turn off EGR now too.

Dimented, do you think the tables were different enough that it would be better to use the stock tables for my car and add some timing rather than having to rework the whole curve, or will I be doing that either way?

Also, what about changing pump shot, will I have to up that as well now with this new engine, I always hear that it has to be changed quite a bit with an engine swap or cam swap? If so what exactly would that be called in TunerPro?

 

Either way youll probably need to work with the timing tables. Give the tpi one a try, though and see how it works. As for the pump shot, it will probably benifit from more, especially if the intake your using has more plenum volume then the stock one.

 

Sounds good I'll give the TPI tables a try then. What about the VE tables, do you think I should start off with the ANLU ones since its the same cam as this engine just different heads?

 

Yes. Those tables would be the ones to start off with.. Jsut make sure to set the base pulse width constant to that of the injectors your using.

 

Ok, I still haven't gotten the injectors yet. I'm trying to find some nice 65pph ones but they're hard to come by for cheap. I may have to settle with some 55pph truck injectors but I can't find many of them either right now.

 

If it's an L98 and not an L05 then go with the L98 VE tables from the tpi calibrations. They WILL be off but they will be closer than the ANLU calibration. VE can be tuned pretty quick just looking at the BLMs if nothing else. Also change your PE AFRs to 12.5 , again, off road use only .

 

good info, thanks Jon