I just built a new 355 with flat tops, 67cc Iron Eagle SS heads, and a CompCams 12-268-4. My static compression is 9.92:1 and quench is 0.045. I have headers with no cats, 3" Flowmaster exhaust, and a Holley Stealth Ram Injection with 30lb/hr injectors.I'm using painless wiring and a 730 ecm. I bought a Hypertech 121326 chip so I would have the knock board I need and a Moates adaptor to bypass the tuning on the chip and I need to know what would be a decent PROM to start tuning. I have a 5 speed manual. I haven't really seen a setup quite like this one while I was searching the posts.

 

doesnt stock 7730 memcals have knock boards in them from the factory? I robbed one of a Beretta last week.

 

NI don't think a 6cyl knock board is the same as a V8, and the fallback code isn't close. Also I don't buy used electronics unless they are 1/4 the price of new.

 

Start with a stock GM calibration. Since there isn't a 5.7l stick trans 3rd gen calibration then AXCN which is a 6-spd y-body calibration is a good start.

You could also use S_AUJP and set it up for stick tranny use. This is a modified version of AUJP with is a 3rd gen 5.7l auto trans calibration.

Note that these are both $8D maskid's.

RBob.

 

Would you suggest the axcn, or the s_aujp since I have iron heads. Would the timing for the Al headed L98 be too much for my iron heads, or will it work.

 

This is a bit of a tough choice. Getting s_aujp to work with the stick tranny may be a bit tricky. Has to do mostly with the IAC set up.

It is probably better to start off with AXCN and copy the stock AUJP (not S_AUJP) main and extended SA tables into it. This is real easy to do in TunerPro and won't take but a couple of minutes.

Set the injector flow for the 30#/hr injectors.

Also, on the higher speed VE table, extend the values higher into the RPM range. If you graph the stock table you will see the TPI hump. With the Stealth ram there won't be as much of a drop-off in VE as the RPM climbs higher. Better to start off rich then lean.

RBob.

 

It depends on what octane fuel you're running. 9.92:1 is awfully high for iron heads on most of today's pump gas. Running Corvette ignition timing (which is pretty agressive) is almost gauranteed to create knocking unless you're running ~100 octane fuel.

May actually be better starting point to copy in the VE and spark tables from an LT1 Camaro/Firebird into the S_AUJP. The shorter runners of the LT1's are probably a lot closer to the Stealth Ram's runners than the AXCN TPI's. The AE will probably need some work too. It requires the $DA3 mask to see those calibrations, but if you want, send me an e-mail to ultm8z@yahoo.com and I'll send over an excel file with those tables. You can copy/paste from Excel into your tuner.

 

Thank you very much. I sent that email.

 

Ok... I sent over the tables. They're from a 93 M6 Z28 Camaro. I included the PE tables as well.

Though, I still think you're going to run into problems with almost 10:1 compression with iron heads if you're running the crappy pump gas that's so typical these days. Keep in mind the LT1 timing curves are set up for engines with reverse flow cooling and aluminum heads to accomodate high compression.

 

I tried putting the timing, ve, ae, and pe from the lt1 into the AXCN.bin. It was pretty rich in lower RPM lower MAP areas, and a bit lean in the higher areas. With my limited knowledge I would think that means it's somwhat tunable. I assume that PE spark is added into the spark table so I put 0 in for all of the pe spark correction. Is that acceptable?

 

Yeah, you're definitely going to need to tweak the tables for your application. What I sent you was for a box-stock LT1 Camaro. But the overall shape of the curve is probably a lot closed to your HSR than the TPI tables.

I zeroed out me PE spark tables too. I just added the correct amount of timing that I wanted directly into the main spark tables.

 

Is PE spark defined in a table that isn't seen in tunerpro definitions for the LT1? I couldn't see anything referencing it in my xdf. Maybe there is a better one, but I haven't seen it. I did a couple data logs today and got my part throttle high vacuum areas a little closer. Cruise is a lot smoother now. Thanks to everyone here for their help. You guys have all the answers. I haven't done any tip in tuning or vacuum pulls yet, but I'll get to that when I get the VEs closer. The LT1 stuff does seem a lot closer than the TPI tables.

 

Unfortunately I use Tunercat to do my tuning, so I don't have a clue on this one. But in Tunercat, the tables are readily available. Can't imagine Tunerpro missed them...

This is under the $DA3 mask? If you're using the latter $EE mask, then I don't think it has PE tables. IIRC, the PE tables are baked into the WOT ARF tables.

 

I'm using DA3, but I'm not sure where the xdf came from. I thought it was tunerpro.net, but maybe I should go there and download another. They may have a better one.

 

BUMP it up. I can't find an xdf or ecu that has any PE spark or idle advance or retard for tunerpro in the $DA3

 

Just to clarify,
Do not use the $DA3 definition to edit the $8D bin.
Use it only to print the table so you can enter it into the 8D tables.

 

I'm not new to tuning my own program, just new to starting from part of a bin from another mask. My problem is the DA3 xdf that I have doen's have any PE spark correction, or any idle over and under spark correction defined. I'm looking for the rest of the logic that my xdf doesn't have so I can use that in my 8d bin.

 

If you want, e-mail me your $8D bin that you're running and I'll input the 93 M6 Camaro PE table values into it using Tunercat and send it back to you. That'll at least get you going on actually getting some road time with the updated PE while you address the xdf issue in parallel. Give me a couple days though once you send it...

 

Thanks. I'm in no hurry though. It runs decent. I don't know if I even need the PE Spark stuff. You could email me a txt of the settings and I can do the keyboard work if that would be easier. I don't know if tunercat will let you do that or not.

 

Not quite sure what you're getting at... You mean the values? I think I had e-mailed you those previously.

 

You did. I didn't have any problem with that. I was Looking for the PE Spark advance, and the spark advance/retard to help steady the idle. I'll look back at the documents you sent me and see if I see those things.

 

Oops my bad. Didn't realize you were after PE spark advance and the spark advance/retard for idle. Thought you were after the PE fueling.

Actually, as I look through the $DA3 mask, there is in fact no PE spark or idle spark advance/retard vs idle speed error.

 

I guess it doesn't have it then. I guess the PE spark is already in the main spark table so I'll just leave the PE advance at 0. I wonder how the idle logic works. I wish I had one I could datalog while it's idling so I could see what the actual total spark was doing. Thanks for looking again. Maybe I can find someone with a LT1 that I can datalog. Would the 94 have the same logic? I know it isn't batch fire, but does that affect the timing logic?