Hey guys,
I've been tuning along for a while now, and I've moved on to adjusting the spark table.
I think I've found the upper limmit for idle advance, and I've been backing off that area with improvements. viewtopic.php?f=89&t=31733
I'm still sneeking up on the max advance. This 340 has a bore of 3.75" and I'm running regular gas so the upper limmit "should" be 34ish. I'm trying 32 this week.
However, what should I be looking for while I adjust my timing advance ramp?
For instance, If I put more advance in about 1200rpm (light cruze) what should I see when I start to reach the upper limmit?
Also, as I advance the timing, will I see any changes in ve requirements at that specific area on the map?
[EDIT] Oh I forgot to add, I'm mainly tuning for economy and drivability. So I think I should be looking for more advance (more torque right?) so it should require less fuel/trottle for a given speed right?
Thanks
Thom
Tuning between spark and ve
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
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Thomjpster
- MegaSquirt Newbie
- Posts: 5
- Joined: Wed Jul 19, 2006 1:36 pm
- Location: Colorado
Tuning between spark and ve
'68 Jeepster, '67 Buick 340" w/DIY headers, Th400, Moded V6 Dizzy w/ V8 reluctor & GM 7 pin HEI, 4.3 TBI W/ V8 injectors, V3 MSII, 2.88 code
should be easy, right? LOL
should be easy, right? LOL
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Thomjpster
- MegaSquirt Newbie
- Posts: 5
- Joined: Wed Jul 19, 2006 1:36 pm
- Location: Colorado
Re: Tuning between spark and ve
Whelp, after quite a bit of experimentation between the spark and VE tables I've gotten quite good results.
The basic results were:
1) Increasing advance pulls more vacc at cruse (up to a point)
2) no real change in VE requirements noticed.
I think I'm running more efficently now because of the shift in Vacc, showing less throttle is required for a given speed.
The basic results were:
1) Increasing advance pulls more vacc at cruse (up to a point)
2) no real change in VE requirements noticed.
I think I'm running more efficently now because of the shift in Vacc, showing less throttle is required for a given speed.
'68 Jeepster, '67 Buick 340" w/DIY headers, Th400, Moded V6 Dizzy w/ V8 reluctor & GM 7 pin HEI, 4.3 TBI W/ V8 injectors, V3 MSII, 2.88 code
should be easy, right? LOL
should be easy, right? LOL