Northstar 6 Speed (Page 18/20) jscott1 JUL 10, 10:29 PM quote Originally posted by Zac88GT: I have the SGI-5 in between the speed sensor and the ECM. .... Thanks again... I gave you a + for helping me out. I need to fine tune my SGI. I've seen the filter mentioned a couple of times, what is it, and where do I buy one? Or where are the plans so I can make one? Zac88GT JUL 11, 07:27 PM This is the schematic that Dakota Digital sent me. jscott1 JUL 11, 09:41 PM quote Originally posted by Zac88GT: This is the schematic that Dakota Digital sent me. Double Thanks!! A diode and a resistor, even I think I can handle that. Alex4mula SEP 22, 09:38 AM Did that filter work for any of you? The one I got from Archie shuts the whole speedo down. I get the jumpy idle just once in a while so I just live with it. BMTFIERO SEP 22, 05:18 PM ANYTHING NEW . . . PINS AND NEEDLES HERE!!! starkmaster03 SEP 25, 04:37 PM I wanted to say thinks for the details and the Pictures. I'm currentingly installing a 6-speed in my 86 and I didn't like the solid transmissions mounts. My friend and I were discussing the different options to make my own custom mounts. Now that I've found this, I've go a good idea on what I can do. Steven Snyder OCT 25, 02:10 PM Hey Zac, I recall reading you were going to take it back to the dyno soon. Have you posted the new numbers? Zac88GT OCT 25, 02:37 PM Well the dyno was a little dissapointing because i couldn't do any tuning due to a strange EMF ECM issue that occurs only on the dyno. At 5500 rpm, even though the throttle is wide open, the tps signal drops from 99% to 33% which pulls it out of power enrich mode. I had this issue before on the dyno so i tried shielding the emulator and ecm with tin foil but it didn't work. It's not the sensor and it never happens on the street. It's something that is related to dynoing it because it's very consistant. I managed to get one run, where i had the current chip installed and the lid on the ecm bolted down, that didn't do it so that's the only graph I have. The afr is around 13.0 which will need some richening up, probably to around 12.5, and i could probably add a bit more timing to the top end. I have a feeling I could probably tune another 10-15whp out of it if i was able to actually tune it on the dyno without this stupid ecm issue. We compared my graph to my buddies (2000 N* with 288* cams and headers) and my power is much more broad. The cams really make his power peaky and it only makes more power than mine above 5500. Right now he's putting down 315whp and i'm at 305whp. His torque is at 300ft lbs and mine is 310ft lbs. The stock cams are much better for mid range so i'm going to stick with them. I've got about 30 more ft lbs of torque through the entire mid range than the cammed motor. Anyway here are the graphs. Steven Snyder OCT 25, 07:29 PM Must be hell to hunt down a problem like that! Where do you have the ECM mounted? Looks like you have a lot of usable torque. You definitely could pick up some peak power with tuning; the AFR spikes lean right where peak power should be. I have heard that the N* likes running rich; 12.5 or 12.0 like you said. How is the tuning on your friend's car with the cams? Zac88GT OCT 25, 07:36 PM quote Originally posted by Steven Snyder: Must be hell to hunt down a problem like that! Where do you have the ECM mounted? Looks like you have a lot of usable torque. You definitely could pick up some peak power with tuning; the AFR spikes lean right where peak power should be. I have heard that the N* likes running rich; 12.5 or 12.0 like you said. How is the tuning on your friend's car with the cams? I have the ecm mounted underneith the arm rest. The tuning on my friends car still has a little ways to go but it won't see much more improvement in the mid range.