Tons of meth - good or bad...
Oct 15, 2007, 07:00 PM
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Tons of meth - good or bad...
I am running 2 X 1.0mm aquamist jets - flows ~1000cc/min or 16gph
KevinD tuned my car this past saturday - with that much meth, you really have to go upwards of 12.0AFR and beyond to make power because of the cooling effect
maybe KevinD can chime in
KevinD tuned my car this past saturday - with that much meth, you really have to go upwards of 12.0AFR and beyond to make power because of the cooling effect
maybe KevinD can chime in
Oct 15, 2007, 07:21 PM
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Sounds good! I'm running 1.0 and 0.9 with larger restrictor, hitting AFR of 12.0 at 30-29 psi on an FP Green with no knock. We finally hit 2 counts of knock after Kevin advanced the timing quite a bit, but then we backed it back down. We're all a bunch of 
... 
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Oct 15, 2007, 10:19 PM
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abners stock injectors running 29psi spike i beleive it was holding 20psi, were only reaching 68% duty. this makes the fuel difficult to control at this enormous volume of methanol. the stock injectors are not such a significant % of the fuel anymore which means it requires very large changes in the tables to make any difference.
anyway, you can see that at 7000 rpm, his duty cycles in yellow (about 11.8ms at 7000).
also, you can see that the AFR is hovering between 12.5 and 12 (right around 12.2 most of the way. when we were on the dyno at 11.5AFR it was missfiring repeatedly
anyway, you can see that at 7000 rpm, his duty cycles in yellow (about 11.8ms at 7000).
also, you can see that the AFR is hovering between 12.5 and 12 (right around 12.2 most of the way. when we were on the dyno at 11.5AFR it was missfiring repeatedly
Oct 16, 2007, 07:45 AM
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interesting data, do you mind posting a log KevinD. I would like to compare flow sensor voltage to what I am seeing. I am running two .9mm nozzles and an AFR of about 12.1 or so. I am still working on my tune but I plan to target AFR of 12.2 or so with 31 psi spikes
Abner - your boost curve looks pretty close to mine, I have a higher spike but then I drop my boost down to the same levels as you. I have found that more boost really only adds TQ and not much HP. I have been able to make more power by lowering boost after the initial spike and just adding timing to make power. With so much meth I have been able to add at least 4 degrees of timing at higher RPM (above 5000) which really helps hold power up top.
Interestingly I have found out just how much boost the stock turbo can make - I don't suggest it to everyone but 33.5 psi spikes are possible and sure are fun.
Abner - your boost curve looks pretty close to mine, I have a higher spike but then I drop my boost down to the same levels as you. I have found that more boost really only adds TQ and not much HP. I have been able to make more power by lowering boost after the initial spike and just adding timing to make power. With so much meth I have been able to add at least 4 degrees of timing at higher RPM (above 5000) which really helps hold power up top.
Interestingly I have found out just how much boost the stock turbo can make - I don't suggest it to everyone but 33.5 psi spikes are possible and sure are fun.
Last edited by dudical26; Oct 16, 2007 at 07:52 AM.
Oct 16, 2007, 08:07 AM
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Alex, the problem is the MBC. you will spike high but boost will taper due to the "fixed orifice" bleed on the WG connection.
One of those EBC like apexi avc-r or the hks will allow you to hold the moost and make more power under the curve.
One of those EBC like apexi avc-r or the hks will allow you to hold the moost and make more power under the curve.
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Oct 16, 2007, 08:17 AM
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I use a MAC solenoid to control boost with the stock ECU. I actually have the ability to hold more boost in the midrange. I have logs with 30psi up to nearly 6k.
But I have found that intentionally having boost fall off after the initial spike works to make power. From my testing - stock turbo + high boost + high rpm does not make as much power as high rpm + medium boost + high timing.
But I have found that intentionally having boost fall off after the initial spike works to make power. From my testing - stock turbo + high boost + high rpm does not make as much power as high rpm + medium boost + high timing.
Oct 16, 2007, 08:22 AM
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how much timing did you manage to cramp in at peak tq?
iirc, kevinD could not put much timing 5 or 6 i think, in as there was a little tendency to knock - so he tuned it moderate timing, high AFR, high boost.
iirc, kevinD could not put much timing 5 or 6 i think, in as there was a little tendency to knock - so he tuned it moderate timing, high AFR, high boost.
Oct 16, 2007, 09:06 AM
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I am still working on my tune. At peak torque with 31 psi spikes I am running 3-4 timing. However, after 5k I start adding lots more timing. By redline I am close to 18 degrees I think and I have no knock after 5k so I am going to add more timing. When I am done tunning I expect to have close to 20 degrees by redline and possibly more. I have not had much free time lately so tuning is a slow progression.
that would be absolutely amazing if its true....
Oct 16, 2007, 09:59 AM
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I have looked for the logs, my mistake I don't make that much boost at that RPM.
Although I think I could get 28 or so. My waste gate duty cycle was only 91% making 26.5 Psi at 6k.
Although I think I could get 28 or so. My waste gate duty cycle was only 91% making 26.5 Psi at 6k.
Oct 16, 2007, 10:23 AM
#13
I have the AVC-R and will be tuning for higher boost this weekend in a dry lakebed. I am currently running 22psi and will be upping it to 25psi. Difference is I have a Snow kit until I save enough for the HFS-1. Yes I said it I am swithcing to Aquamist and will be happier.
