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Engine rattle on load / acceleration -Mostly solved!
- Marek
- Visitor
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22 Jan 2021 23:44 - 23 Jan 2021 12:11 #232099
by Marek
Replied by Marek on topic Re:Engine rattle on load / acceleration -Not yet solved
Hi!
Here is my experience about swapping m16 VVT from 07MY SX4 10.5 CR into Jimny 13MY.
With SX4 engine i also used Liana's m16 TB and blue injectors coming with SX4 engine.
Results:
- engine knocking under load and high revs always especially when hot. Even with 98
- black tailpipe. LTFT going up to -15%
- poor cold start and warmup. Noticeable rich mixture
In theory Liana M16 9.5 CR block would have to have bigger piston chamber volume (?) so we would have to use Liana's block or pistons in our M16 9.5 CR VVT Jimny. I just remind that m13 and m16 deck clearance, piston chamber and head chamber volumes are the same that's why we have CR difference between M13 and M16.
Finally i decided machining the SX4 pistons.
After CR recalculation outcome was about 9.7:1
Also installed back M13 orange injectors.
Used camshafts from M13. Noticed that M13 cams have 0.5mm smaller valve lift and torque designed cam lobes. As the exhaust and intake are stock so i think it's doesn't make sense to use "mild road" cams.
Finally there are no more any knocking. LTFT is now around 0, perfect engine start, warmup and noticeable mid range torque with M13 stock cams.
Here is my experience about swapping m16 VVT from 07MY SX4 10.5 CR into Jimny 13MY.
With SX4 engine i also used Liana's m16 TB and blue injectors coming with SX4 engine.
Results:
- engine knocking under load and high revs always especially when hot. Even with 98
- black tailpipe. LTFT going up to -15%
- poor cold start and warmup. Noticeable rich mixture
In theory Liana M16 9.5 CR block would have to have bigger piston chamber volume (?) so we would have to use Liana's block or pistons in our M16 9.5 CR VVT Jimny. I just remind that m13 and m16 deck clearance, piston chamber and head chamber volumes are the same that's why we have CR difference between M13 and M16.
Finally i decided machining the SX4 pistons.
After CR recalculation outcome was about 9.7:1
Also installed back M13 orange injectors.
Used camshafts from M13. Noticed that M13 cams have 0.5mm smaller valve lift and torque designed cam lobes. As the exhaust and intake are stock so i think it's doesn't make sense to use "mild road" cams.
Finally there are no more any knocking. LTFT is now around 0, perfect engine start, warmup and noticeable mid range torque with M13 stock cams.
Last edit: 23 Jan 2021 12:11 by Marek.
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