Alright so after 5 years of owning my camaro I did a motor swap for an l98 with an lt1 cam, I've got most of the kinks worked out and I now have about 3k on the motor, after the break in period I took it for a few hard drives and I've noticed that in the lower range of the rpm scale it is kind of hesitant, not to a hindering point but once it hits the 3k mark it takes off. I've been told by some you need a tune, others say no you don't. The "need" to me is it runs, but I know it can run better with a tune. I know people have done this before and I was wondering if there was a modified aujp bin floating around that's got the cam factored in. If not how would I go about tweaking the aujp to accomidate the cam? I have access to a moates setup for chip burning but my friend who has it was really only comfortable with throwing the aujp bin onto an eeprom for me lol neither of us have messed around with different parameters yet beyond deleting vats and messing with fan temps

I also wanted to note when I punch it and it hits the healthier part of the rpm range it blows smoke, and my afr goes overly rich so in hoping a tune will remedy this situation

Any info you can offer related to my questions would be greatly appreciated

 

Anybody? I've been messaged by a member on here saying the saujp would be a good starting point for me, I've searched and found quite a few fragmented threads on the subject, from what I can gather load the saujp, change the spark to the aujp values because the lack of aluminium heads? And timing as well, my question on that though is if I change the saujp timing to aujp couldnt I achieve the same goal by adjusting my timing to the saujp? The point of this thread is to get a starting point for myself and a push in the proper direction I can probably fill the blanks in myself

 

I would start with a datalog. It may tell you if fuel trim(BLM) is off. I suspect it is.

 

The LT1 cam is so close to the 350 L98 cam that no tuning should be required. It's natural for an engine to run 12:1 at WOT. My guess is that you have one or more devices not set correctly causing this poor running condition.
To start, what is the injector number, and what's the prssure read with vacuum disconnected?

 

First off, what Ecm and prom are you using right now? Your car was a TBI and you converted to TPI?

 

I realize the cam isn't much different, from what I've been told its comparable to using 1.6 rockers on a stock cam, being that I didn't have one and the lt1 was available it went in there lol the inectors are ford factory 24lb ones Idk if its helpful but they're green, I've got a bbk afpr on there running 45 psi currently. I ran a datalog last night with a bit of city driving and highway, my bond at idle were around 126, once I hit the highway they went 106-110 and turned yellow in tunerpro, and the rich/lean status was just blinking rich the entire time. I would like to become more competent with tuning I've read a ton of info but its all a mess right now in my head lol

 

7730 with a g1 adapter and a eeprom using a slightly modified aujp to account for my t5

 

Get a magnifying glass and pull the 280-15?-??? number from the injector. Is 45 psi with vacuum unplugged?

 

Iirc . The Ford 24 lb inj are blue and the 30 lb are green

 

According to the seller and ny internet research they're 24lb/hr injectors, ill have to pull the number off them for you in a bit, Mrwillys what do you mean by 45psi unplugged? Without the vacuum port to the afpr connected?

 

Let's say you're running a 280-150-947
http://www.witchhunter.com/flowdatapix/b0280150947.jpg
You would set the flowrate in the programming to 24.1 lbs, and set pressure with vacuum disconnected to 44, and the reconnect vacuum.

 

I think he means checking/setting fuel pressure with the AFPR hose disconnected from the plenum and plugged and also the plenum nipple plugged too. Car should be idling also.

 

Yes

 

+1

 

Hrrrmmmm... Looks like I need to dig out my gauge before getting deeper into this lol

 

Try this:
http://www.scotthansen.net/blufbdy.bin
It's set for 24.1 lbs using a AXCN BCC with a modified spark table.

 

Ok well ill have to do that today and get back to you with the results, when the afpr is disconnected I'm assuming I need to plug the hose, then set to 44psi and reconnect with the engine on the whole time correct?

 

No need to plug vacuum leak unless it makes you feel better. Were not tuning it, just setting pressure. Running, or watching it as key is turned on and pump cycles both work. You did update fuel pump from TBI?

 

Oh yeah 255lph walboro pump in the tank, just to clarify all this the l98 is bored out to a 355, stock heads lt1 cam, stock tpi no porting or anything, ford green injectors, 7730 ecm with g1 adapter, new fuel pump and the bbk afpr. With the exception of the afpr, lt1 cam and the bore this thing is stock so we burned an aujp to the eeprom, killed vats and egr, and hit the manual transmission flag but while I was researching the saujp I noticed that there's more to it than just hitting the flag Idk if that applies to aujp or not though

 

Yeah, there is, that why I gave you a AXCN file. No VATS, No EGR with a custom spark map for iron heads. As long as you have 24 lb injectors you should be good. I set fans for a 180 degree thermostat too.
I use TunerCat so it's much easier to work the bin.

 

Ok I've got a 195 Tstat in there right now but summer is coming soon so ill be putting a 180 in soon anyway, the charcoal canister is also gone so should that be accounted for in the bin? I forgot to ask that earlier

 

Okay, I modified the bin for a 195 thermostat. Charcoal canister will not set a code. You will have to re download the file.

 

So i just took the car for a spin with that tune, it reacted very well. I had to turn off the knock flag and change the cts differential because the memcal i have for backup, but thats a seperate issue altogether lol I need to check that fuel pressure tomorrow, it was raining pretty hard all day, and i also need to adjust my rocker arms, i can hear them ticking

so a couple mechanical issues to fix but that tune is an excellent start for me i really appreciate the help. Is there a resource besides the stickies to become more aquainted with tuning? The only parameters im capable of editing are either no brainers or ones ive had trouble with, i would like to be able to become fluent with the process so i can actually edit and fine tune

 

I built a page on tuning with Datamaster at http://www.scotthansen.net/data.html
You can download Datamaster and use it for 20 logs for free. I like it because it has a table that will give you BLM averages. This makes tuning much more accurate than guessing from a single cell at a given moment.

 

So i checked the fuel pressure today with the key on engine off I'm sitting at 41 psi to the rail, I had to swap back to my old tune, the one I got from you was great while driving until I needed to acceleratehard, it felt choked out, lacking I guess. The blm and int values stayed in the blue under all conditions however. It still read out rich though. I failed to mention I have no cat, is there an adjustment I need to make to account for that? I was thinking I could pretty much cross the two tunes and make a good all around would this be a good idea?

 

EGR needs to be removed from the tune if you are non EGR. Air pump cat con I dont believe is addressed in tune.

 

There is an 02 bias voltage for use when the air pump is in operation that needs to be ZERO'd out as well as a temperature constant to lower the threshold to enable EST timing advance. GM got the infinite wisdom to retard the timing with a cold engine and blow air into a rich air/fuel mixture. When the spark advance would go under EST control at 120*F coolant temperature my 7730 run TPI would feel like I was going to rear end the car in front of me. It would ALWAYS "KICK IN" while sitting at a light a couple of blocks from my house on cold mornings. He can also tighten up the 02 swings and lean out the midrange some without the cat. GM calibrations tend to dump too much fuel in PE mode to drown out the cat.

 

Would this be specific for 6E? I dont see in EBL. Tables nor constants. Possible EBL does not support air pump? What else might it be called? I searched TP for multiple words. I remove air pump/catcon years ago and never addressed in tune.

 

Never have seen it in the EBL, but I know for certain it is in the 8D and fairly certain it is in 6E and priors.