Rev Limiter doesn't seem to work
07-28-2008, 09:49 AM
#1
Elite Member
Thread Starter
iTrader: (3)
Join Date: Apr 2008
Location: Outside Portland Maine
Posts: 2,023
Total Cats: 19
Rev Limiter doesn't seem to work
I have the rev limiter set at 7300, but last night while driving, I saw the RPM hit 74xx on megatune.
The soft limit is at 7000 with a max abs. timing of 10deg. Soft limit time is 5s and the hard limit is set at 7300 for a fuel cut.
Any ideas why this would let me rev past 7400?
I didn't change the base number or the cut n' sparks out of base number because I don't really know what they are, but they're set at 5 and 3.
I'm running the MSPnP tables with only minor changes here and there.
The soft limit is at 7000 with a max abs. timing of 10deg. Soft limit time is 5s and the hard limit is set at 7300 for a fuel cut.
Any ideas why this would let me rev past 7400?
I didn't change the base number or the cut n' sparks out of base number because I don't really know what they are, but they're set at 5 and 3.
I'm running the MSPnP tables with only minor changes here and there.
Reply
0
0
12-08-2011, 07:31 AM
#6
Junior Member
Join Date: Aug 2009
Location: Lake Jackson, TX
Posts: 166
Total Cats: 7
Not a direct answer to any of the questions here, but it is probably useful relevant information:
The stock tachometer in the cluster (at least for 90-97 cars, and I assume for 99-05 too) can be calibrated. There is a small potentiometer for calibration that can be accessed if the gauge is unbolted from the cluster housing (3 screws, I think)--be warned that even a tiny rotation of the potentiometer has a very big change on the tach sweep. In order to calibrate it properly you will need a reliable tachometer to compare it to (possibly using the laptop connected to MegaSquirt?).
The stock tachometer in the cluster (at least for 90-97 cars, and I assume for 99-05 too) can be calibrated. There is a small potentiometer for calibration that can be accessed if the gauge is unbolted from the cluster housing (3 screws, I think)--be warned that even a tiny rotation of the potentiometer has a very big change on the tach sweep. In order to calibrate it properly you will need a reliable tachometer to compare it to (possibly using the laptop connected to MegaSquirt?).
Reply
0
0
08-13-2012, 10:19 PM
#12
I think I saw my tech approaching 8k yesterday at an autox so I need to look into this ASAP. Wouldn't it bad to have a hard fuel cut-off when your boosting? I have my rev limiter for hard and soft set at 7200, soft limit absolute timing deg 10, soft limit max times 5s. I will lower the soft limit to 4500 and see if it works. Any thoughts?
Reply
0
0
08-13-2012, 10:35 PM
#13
I think I saw my tech approaching 8k yesterday at an autox so I need to look into this ASAP. Wouldn't it bad to have a hard fuel cut-off when your boosting? I have my rev limiter for hard and soft set at 7200, soft limit absolute timing deg 10, soft limit max times 5s. I will lower the soft limit to 4500 and see if it works. Any thoughts?
Reply
0
0
08-13-2012, 10:52 PM
#14
What the ****. How did this post from 2008 get necrod not just once, but twice?
On topic: 1st, you have a 90. 8k on the tach IS about 7100-7200. I have a 91, it's the same way for me man. Don't use a 1.6 tach for anything more than a vague, general rule of thumb - I can't recall a single scenario in which I've ever seen it be dead on, even at ******* idle.
On topic: 1st, you have a 90. 8k on the tach IS about 7100-7200. I have a 91, it's the same way for me man. Don't use a 1.6 tach for anything more than a vague, general rule of thumb - I can't recall a single scenario in which I've ever seen it be dead on, even at ******* idle.
Reply
0
0
Thread
Thread Starter
Forum
Replies
Last Post
StratoBlue1109
Miata parts for sale/trade
21
09-30-2018 01:09 PM
Frank_and_Beans
Supercharger Discussion
13
09-12-2016 08:17 PM
