Hello,

I was wondering how my Closed loop boost target table should look like, as I do not want too much torque or HP to keep my stock rods alive.

My setup is a 1.6 '91 motor with a Begi S3 kit GT2560r, 450cc injectors, 2,75"DP 2,5"catback running on MS2pnp. Street use only

My intention is to run this at a safe power and PSI until I replace the OEM rods by forged ones next year.
Does someone has a similar setup that has been proven to be safe for a while?
I would like to see your boost target table (dyno if possible).
Other things that I should be aware of?

Thanks to all

 

search " current proven setup" should lead you in the right direction.

 

Thanks, very useful indeed. I would want to see boost target values also as I do not want to exceed the stock engine torque limit.

Thanks

 

From my experience you should set your limits first. I'm assuming you've got your fuel and spark tables tuned to 200kPa? If not then stop here until you have.
First set your over boost protection up, then you know you can get the table boost wrong and it'll be ok.
I've set mine at 180 kPa fuel cut
Then do a WOT run log with the table at 100 throughout to find out what your wastgate only control is taking you to.
Then decide where you'd like to be PSI wise. Remember that 14psi will be around 200 kPa
If you decide 10psi is your target start by reducing you boost map in small amounts across the board, probably 90 to start with to see any effect.
Then its the fun part, WOT runs in 2nd and 3rd to get the info you need, then if you want feedback post up the logs.
I aimed for 9psi in 2nd gear at 3800rpm holding steady then to the redline. I found that this table then ran close to 11psi in higher gears but just low enough not to over boost. It's a case of adjust, log and analyse.

 

Ok thanks, that makes sense, but all that is already done.

I was wondering how I could be sure to not have too many torque at about 3800 - 5500 RPM range.

Maybe there's nothing to worry about, just don't want to bent my rods.

Is it possible with the begi S3 setup to bent my rods with a max of 14psi ?
The most danger is at the max psi range but also in the max torque range.
If yes, I can lower the pressure to about 12psi but would there still be a chance to bent these by applying too many torque?



Thanks

 

The over boost will limit your PSI if you hit the over boost then your numbers are too low in the boost map in that area.
I've read lots of opinions about boost level safety, it's a decision you'll have to make yourself.
Healthy engine and good tune will allow you to have higher PSI. Me personally I wouldnt go over 10psi until you've got that tuned and have proven it's sound.