prechambers mods?
prechambers mods?
(12-13-2014, 12:28 PM)OM616 Something to keep in mind regarding PC Mods...
Just opening up the burn holes will improve starting ease, quiet knocking, reduce smoke, lower high RPM EGTS, and increase torque and top end power a little. I say a little because if the fuel and timing settings are not also changed to take advantage of the effect larger holes have, then you are just making the stock set up more efficient.
The true power gains come from advancing the timing DRAMATICALLY, and then Increasing the fuel.. And by Dramatically I mean advance the IP to the stops at the very least.. To really get the most out of it, you will need to pull the IP and reclock it so you have adjustment again.
The small PC holes are the limiting factor in regards to timing, the cylinder pressure gets to ignition temp way before the PC air does because of the restriction from the small holes. By opening up the holes, the PC will fill faster, and there for reach Ignition temp sooner, allowing the injection to take place sooner without knocking. Advancing the injection timing results in more torque, power, and lower EGTs. This allows you to increase the fuel even more than you could with the stock PCs and with the same boost.
If one is unable or afraid to adjust the IP and fueling to take advantage of the larger PC holes, it is best not to mess with them at all. Just my 2 cents based on doing a couple lol..
Btw I finished the job today. A cobalt drill bit works nicely
[/quote]
hy, din´t i told u . just got to ask!!!
i dont like to buy online, several times i ordered some crap and ended up the wrong crap and took me a long time to have the right crap.
post us with the results i too have my pre cups as:
inner hole to ejector head 8mm,
inside hole under the injector seat 10mm
center ejector hole 2mm
the 8 holes around 3mm
regards.
(12-13-2014, 12:28 PM)OM616 Something to keep in mind regarding PC Mods...
Just opening up the burn holes will improve starting ease, quiet knocking, reduce smoke, lower high RPM EGTS, and increase torque and top end power a little. I say a little because if the fuel and timing settings are not also changed to take advantage of the effect larger holes have, then you are just making the stock set up more efficient.
The true power gains come from advancing the timing DRAMATICALLY, and then Increasing the fuel.. And by Dramatically I mean advance the IP to the stops at the very least.. To really get the most out of it, you will need to pull the IP and reclock it so you have adjustment again.
The small PC holes are the limiting factor in regards to timing, the cylinder pressure gets to ignition temp way before the PC air does because of the restriction from the small holes. By opening up the holes, the PC will fill faster, and there for reach Ignition temp sooner, allowing the injection to take place sooner without knocking. Advancing the injection timing results in more torque, power, and lower EGTs. This allows you to increase the fuel even more than you could with the stock PCs and with the same boost.
If one is unable or afraid to adjust the IP and fueling to take advantage of the larger PC holes, it is best not to mess with them at all. Just my 2 cents based on doing a couple lol..