Help with tuning new motor, please
Thread Starter
Joined: Jan 2002
Posts: 4,069
Likes: 74
From: Casselberry FL
Help with tuning new motor, please I've gotten insufficient assistance on HPTuners forum, so I'll try here. And if that doesn't help, then I guess I'm off to see what the EFILive forum has to say.
HPT Thread
I re-used the old connecting rods, but other than that the short block has all different components than the last block. Idle has a very minor rolling that I can hear but not very well see on the log. My base running airflow is tuned, and my VE is typically within 4% below 4000RPM. My spark table wasn't the greatest on the old motor, and it's only gotten worse with this motor. I'd like a good smoothed table to begin with for knock tuning, as I think the transitions between cells and/or main/low/idle tables are the prime source of my grief. I'm using an OLSD tune.
SCR is ~11.1, DCR is ~8.9. Cam is a 227/235 110+2.
My biggest complaints at this time are:
1) Severe bucking below say 2000RPM. Even minor throttle changes will send it into a grand mal seizure.
2) If I don't give it enough throttle from a stop (almost 1500RPM), it'll fall on it's face and die.
Thanks in advance!
HPT Thread
I re-used the old connecting rods, but other than that the short block has all different components than the last block. Idle has a very minor rolling that I can hear but not very well see on the log. My base running airflow is tuned, and my VE is typically within 4% below 4000RPM. My spark table wasn't the greatest on the old motor, and it's only gotten worse with this motor. I'd like a good smoothed table to begin with for knock tuning, as I think the transitions between cells and/or main/low/idle tables are the prime source of my grief. I'm using an OLSD tune.
SCR is ~11.1, DCR is ~8.9. Cam is a 227/235 110+2.
My biggest complaints at this time are:
1) Severe bucking below say 2000RPM. Even minor throttle changes will send it into a grand mal seizure.
2) If I don't give it enough throttle from a stop (almost 1500RPM), it'll fall on it's face and die.
Thanks in advance!
TECH Enthusiast
Joined: Jan 2003
Posts: 582
Likes: 0
From: Birmingham, AL
I'm in the process of testing the effects of some of this stuff myself but I will tell you what I do know so far and maybe it'll help you out. First off what is your idle timing set to? Also what does your high timing table below 2000 look like? Got any logs you could post up?
Thread Starter
Joined: Jan 2002
Posts: 4,069
Likes: 74
From: Casselberry FL
High octane & low octane tables are the same. Idle in Gear timing is +/- 3* around idle, but way off in the upper g/cyl. I'm just not sure the proper way to make them meet. The logs are in the HPT thread, but I'll post them here too.
Thread Starter
Joined: Jan 2002
Posts: 4,069
Likes: 74
From: Casselberry FL
I didn't have any problems using the lower resolution with the old H/C motor. No bogging, bucking, or pinging in any gear above 1000RPM. Perhaps the different components will exacerbate the problems, though. I'll buy the 2Bar upgrade if needed.
But that doesn't really give me any direction to try with the aforementioned issues.
But that doesn't really give me any direction to try with the aforementioned issues.
TECH Enthusiast
Joined: Jan 2003
Posts: 582
Likes: 0
From: Birmingham, AL
Wow, those timing tables are a little....rocky? 
You could try changing your Idle Spark Drive & Park tables from the 400-1200 rpms all the way down the column to 24* and a smoother timing table certainly couldn't hurt. Just a couple suggestions I'm throwin' out there.
You could try changing your Idle Spark Drive & Park tables from the 400-1200 rpms all the way down the column to 24* and a smoother timing table certainly couldn't hurt. Just a couple suggestions I'm throwin' out there. Thread Starter
Joined: Jan 2002
Posts: 4,069
Likes: 74
From: Casselberry FL
I had the Himalayas in mind, but point taken Just looking for suggestions on how much of the map needs to match the idle in gear map. I found this spark map from a forged 347 on the repository I'll try, whose tables seem to be better aligned. His cam is ~10* larger on both lobes, and the static compression is ~.6 higher. Unsure on his DCR, but mine is around 8.9.
Repository tune
Just looking for suggestions on how much of the map needs to match the idle in gear map. I found this spark map from a forged 347 on the repository I'll try, whose tables seem to be better aligned. His cam is ~10* larger on both lobes, and the static compression is ~.6 higher. Unsure on his DCR, but mine is around 8.9.Repository tune
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TECH Enthusiast
Joined: Jan 2003
Posts: 582
Likes: 0
From: Birmingham, AL
LOL! Glad to see you found you a close tune. Maybe those idle spark and timing tables will help you out. I'd be interested to hear whether they do or not. They looked promising. Good luck.
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