Finished the Alky Control Methanol Injection installation C6 Z06 N/A
01-17-2017, 04:56 PM
#41
Burning Brakes
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St. Jude Donor '13
This tune is a rich tune with pretty much 12VDC applied to the injectors (you only get 100% of what it can flow at given fuel pressure), fuel flow keeping the injectors from burning up (plus the factory safeguard) and spraying methanol/water mix to control atmosphere/richness. I will eventually get the proper sized injectors. This took a lot of extra work on my part but it is a hobby for me and I enjoyed calculating then tuning it.
If the methanol doesn't turn on, the AFR will be very close to the lean high torque tune but shouldn't be damaging to the engine. I tune at three different AFR's a lean high torque (timing is very critical here), a mean (as in average) torque tune and a rich high torque tune (can handle additional timing but makes about the same power as the lean high torque tune). I will run the rich high torque tune so there is less of a possibility of hurting the engine if something goes wrong. Is this perfect. No. Is this foolproof. No. Is this safer than tuning methanol on the lean high torque tune with additional timing relying on the methanol/water mix. Yes. Am I leaving some power on the table? Yes. Do I have a lean high torque with additional timing relying on methanol tune ready to go if I get brave. Yes.
The low octane table is the injector only tune values.
Sunday will tell the story. Keep in mind this is a weekend warrior type car for me, but I do want to see what she's got in her. I'm also hoping for 27+ mpg driving the two hours to the event. Been working on that part of the tune as well.
If the methanol doesn't turn on, the AFR will be very close to the lean high torque tune but shouldn't be damaging to the engine. I tune at three different AFR's a lean high torque (timing is very critical here), a mean (as in average) torque tune and a rich high torque tune (can handle additional timing but makes about the same power as the lean high torque tune). I will run the rich high torque tune so there is less of a possibility of hurting the engine if something goes wrong. Is this perfect. No. Is this foolproof. No. Is this safer than tuning methanol on the lean high torque tune with additional timing relying on the methanol/water mix. Yes. Am I leaving some power on the table? Yes. Do I have a lean high torque with additional timing relying on methanol tune ready to go if I get brave. Yes.
The low octane table is the injector only tune values.
Sunday will tell the story. Keep in mind this is a weekend warrior type car for me, but I do want to see what she's got in her. I'm also hoping for 27+ mpg driving the two hours to the event. Been working on that part of the tune as well.
Last edited by MickVette; 01-17-2017 at 04:58 PM.
01-23-2017, 09:16 AM
#42
Burning Brakes
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St. Jude Donor '13
I changed my strategy and showed up with a very rich tune then leaned it out each run until I started to get a touch of knock then added a little fuel back then some timing. My first pass was 159mph and it got faster as I dialed the car in to a best of 164.47 mph. I'm pretty happy with that.
I got to race a lot of really cool cars, meet great people with a common interest and just had an all around good time.
01-23-2017, 09:33 PM
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St. Jude Donor '15
Nice runs!
01-23-2017, 09:52 PM
#44
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St. Jude Donor '13
Thank you. I may need your help with hot idle after the car has been sitting. The idle hunts, surges and stalls until some time has passed then it seems to stabilize out. I've been concentrating on the other parts of the tune but am not sure where to address this issue. Any suggestions?
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viper8u2 (07-13-2017)
01-24-2017, 10:08 AM
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Thank you. I may need your help with hot idle after the car has been sitting. The idle hunts, surges and stalls until some time has passed then it seems to stabilize out. I've been concentrating on the other parts of the tune but am not sure where to address this issue. Any suggestions?
There's a long thread on HPTuners forum that goes through setting a lot of the integral/prop idle stuff. I'd try following that first. I think BigMike posted it if memory serves
01-24-2017, 11:46 AM
#47
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St. Jude Donor '13
232/246 duration, .639/.639 lift on a 115+3 LSA
I'll look for that post. I did play with the Prop/Integral and it helped a lot just hot restarts are hunting all over the place.
I'll look for that post. I did play with the Prop/Integral and it helped a lot just hot restarts are hunting all over the place.
01-24-2017, 03:14 PM
#49
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St. Jude Donor '13
I haven't had a chance to really look at the logged runs in detail yet and see what it likes. All I did was lean each run a little until I saw knock, put the previous fuel back in and add timing until the mph went down since it didn't knock adding even 3 degrees more timing. Been so busy, the car is still packed full and filthy from this weekend.
01-24-2017, 03:31 PM
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St. Jude Donor '15
Guys on the HPT forum, especially Greg (Ghuggins) and the guy that made the idle thread (BigMike I think?) should be able to help more than me
Greg also knows a ton about injection timing and has been able to make some pretty decent mid-range gains just by adjusting inj timing, so it may be worth making a thread over there to see if he chimes in
01-24-2017, 09:55 PM
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St. Jude Donor '13
Yeah that's not a huge cam but getting idle right for all conditions can be a PITA.
Guys on the HPT forum, especially Greg (Ghuggins) and the guy that made the idle thread (BigMike I think?) should be able to help more than me
Greg also knows a ton about injection timing and has been able to make some pretty decent mid-range gains just by adjusting inj timing, so it may be worth making a thread over there to see if he chimes in
Guys on the HPT forum, especially Greg (Ghuggins) and the guy that made the idle thread (BigMike I think?) should be able to help more than me
Greg also knows a ton about injection timing and has been able to make some pretty decent mid-range gains just by adjusting inj timing, so it may be worth making a thread over there to see if he chimes in
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Silver Bullet C6 (01-25-2017)
02-09-2017, 11:21 AM
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St. Jude Donor '13
Yeah that's not a huge cam but getting idle right for all conditions can be a PITA.
Guys on the HPT forum, especially Greg (Ghuggins) and the guy that made the idle thread (BigMike I think?) should be able to help more than me
Greg also knows a ton about injection timing and has been able to make some pretty decent mid-range gains just by adjusting inj timing, so it may be worth making a thread over there to see if he chimes in
Guys on the HPT forum, especially Greg (Ghuggins) and the guy that made the idle thread (BigMike I think?) should be able to help more than me
Greg also knows a ton about injection timing and has been able to make some pretty decent mid-range gains just by adjusting inj timing, so it may be worth making a thread over there to see if he chimes in
Last edited by MickVette; 02-15-2017 at 12:51 PM.
02-15-2017, 01:56 PM
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St. Jude Donor '15
Nice runs
02-15-2017, 08:51 PM
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St. Jude Donor '15
I'd be happy just to get more than 1 run in. I've been to three 1/2 mile events now and only got 4 runs in total... weather killed 2 of the events and the third was so crowded I could only get through the line a few times all day. It was miserable.
02-16-2017, 08:01 AM
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St. Jude Donor '13
It was supposed to rain here and it held off. I think many didn't show up for that reason and I got as many runs in as the car would tolerate (10). The car lost the B1S1 O2 sensor so keeping the car idling at the event was a chore and lost the power outlet for the cameras so I was happy to get a few in car videos and ended up using my phone for the front facing camera on a few runs.
For some reason the laptop wouldn't hold or charge in the car so I didn't get to tune as thoroughly as I wanted, but was able to make good progress. I had to charge the laptop between runs in another vehicle.
Last edited by MickVette; 02-16-2017 at 11:19 AM.