eibxmatic
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« on: June 23, 2015, 02:49:46 AM »
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Hi Iam driving a mk1 Audi TT with the 225hp apx engine.
As I know the original conrods shouldn't be stressed with much more then 400nm (also not too aggressive)
So is there anyway you can guess ur desired torque out of e.g. Lrdxn or kfmiop? Just to guess a "save zone" without a dyno?
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tjwasiak
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« Reply #1 on: June 23, 2015, 06:39:42 AM »
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Your engine should output 280Nm between 2200 and 5500 RPM in stock form. Taking into consideration ME7 is torque based you should be able to calculate safe load level but do not forget every engine is different so it would be wise to check it on dyno when you will be done with tuning.
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carsey
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« Reply #2 on: June 26, 2015, 10:09:59 AM »
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No set rule for the max torque rods can take. Typically over 300lbft your on a fine line. Peak cylinder pressures are more likely to bend a rod.
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eibxmatic
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« Reply #3 on: June 26, 2015, 04:38:11 PM »
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No set rule for the max torque rods can take. Typically over 300lbft your on a fine line. Peak cylinder pressures are more likely to bend a rod.
Well and there is not really a way to be sure u don't put to much stress on. Even with stock hardware. Have seen banana rods on 225 TT with chip only. |
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vwaudiguy
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« Reply #4 on: June 26, 2015, 10:34:46 PM »
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Have seen banana rods on 225 TT with chip only.
Any more details on this? |
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"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
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adam-
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« Reply #5 on: June 27, 2015, 08:40:49 AM »
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You don't really need details. You can bend rods on high milers on 1.8t's. The rods, in stock form, are not strong.
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vwaudiguy
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« Reply #6 on: June 27, 2015, 01:16:03 PM »
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You don't really need details. You can bend rods on high milers on 1.8t's. The rods, in stock form, are not strong.
"Higher mileage engines" there's some detail. No mention of what octane, what tune, water inj, etc. Just curious for god's sake. I understand it's stress over time as far as the rods go. They can handle 400 lft./lbs of tq but for how long...I personally haven't seen bent rods on stock turbo with software only, which was why I asked. |
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"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
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IamwhoIam
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« Reply #7 on: June 27, 2015, 04:41:14 PM »
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I have no logs because I have a boost gauge (makes things easier)
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_nameless
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« Reply #8 on: June 27, 2015, 07:13:51 PM »
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i did 370 ft tq on stock azg (8V) bottom with stock (modified) pistons and rods with a 20v head. |
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If you are in the market for a tune and would like the ease of downloading and flashing a dyno tested tune for a fair price check out https://instatune.sellfy.store/ |
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eibxmatic
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« Reply #9 on: June 28, 2015, 08:22:11 AM »
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It was a tuned apx with anti lag Lc. The Lc bend the rods.
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spacey3
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« Reply #10 on: June 28, 2015, 12:39:37 PM »
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I bent BAM rods with stage 1 revo and threw one in the replacement with stage 2... Both less than 300ft/lbs id say.
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carsey
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« Reply #11 on: June 28, 2015, 03:16:35 PM »
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Some stock k04 motors can have a bent rod. No software updates, no hardware. Totally stock as it left the factory.
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adam-
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« Reply #12 on: June 28, 2015, 11:47:14 PM »
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It's just luck if you can run good power for a length of time.
I ran NLS and AL on stock rods for 5k and never threw one. Used heavily too. I knew the risks and got lucky man
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jochen_145
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« Reply #13 on: September 09, 2017, 07:04:58 AM »
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Comming back to topic:
It should be possible to calculate the troque basied on maximum filling, as fare as you don´t bend the KFMIRL and KFMIOP maps..
ECU calculates torque and send the results an CAN-bus (e.g. to be reat by DGS).
Someone ever recalculate from maximum filling to output torque.
I started, but a the moment I am still a 10Nm to high up to 3500rpm and getting off at higher rpms. So I think I am missing some corrections, but don´t know at the moment
Anyone can help ?
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nyet
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« Reply #14 on: September 09, 2017, 10:19:31 PM »
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much more accurate to guess torque based on rpm/time data.
ecuxplot does this for you.
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