Thread: Raising the boost - step by step or all in one?

I used temporary boost guage and disconnected the modulator to set. Guage is cheap or borrow one of a mate with a turbo.

i do not know the proper answer on this only that i am winding mine out 1 turn every no and then and still not hit overboost.
i do have a bas boost box fitted and boost guage pre i/c showing 21psi at full throttle? might wind it out a bit more before the weekend.

Shortening a turn and going for a run is fine. A Nanocom or similar is better, but I know you don't have one.

Just a reminder that if you have it right on the edge of over boost on say a 35 degree day, you may get over boost fault regularly on cooler days so may have to back it off 1/4 in this case.

Cheers

I think once I hit overboost I'll wind it back say....3/4 of a turn and keep fiddling with it until I find the right sort of middle ground.

Originally Posted by Yorkie

i do not know the proper answer on this only that i am winding mine out 1 turn every no and then and still not hit overboost.
i do have a bas boost box fitted and boost guage pre i/c showing 21psi at full throttle? might wind it out a bit more before the weekend.

I'd be careful going beyond 21psi. TD5Alive/Alive Tuning recommend only 18psi as the safe limit. In saying that BAS recommend up to 22psi with their VNT conversions.

Why is your boost gauge pre-intercooler? this is an irrelevant figure (unless you are measuring the pressure drop over the intercooler), you want to know the actual boost pressure going into the engine which you need to measure at the inlet manifold (either drill and tap a fitting into the inlet manifold or get an EGR removal kit with a fitting for the gauge).

Hmm.
Had a go at it today. Lock nut took a fair bit to shift, shaft twisted a bit despite vice grips but hopefully that's not going to cause issues.
Couldn't move the furled nut at all.
I gave it a bit of a squirt to try and loosen them up so I might try later.

Originally Posted by twr7cx

I'd be careful going beyond 21psi. TD5Alive/Alive Tuning recommend only 18psi as the safe limit. In saying that BAS recommend up to 22psi with their VNT conversions.

Why is your boost gauge pre-intercooler? this is an irrelevant figure (unless you are measuring the pressure drop over the intercooler), you want to know the actual boost pressure going into the engine which you need to measure at the inlet manifold (either drill and tap a fitting into the inlet manifold or get an EGR removal kit with a fitting for the gauge).

i have it connected to a t-piece off the pipe running to the i/c as have not had chance to get someone to tap the egr pipe replacement. so allowing for 3-4psi loss through the i/c which i have read off the various forums i seem to still have a little more to go.

Originally Posted by Yorkie

i have it connected to a t-piece off the pipe running to the i/c as have not had chance to get someone to tap the egr pipe replacement. so allowing for 3-4psi loss through the i/c which i have read off the various forums i seem to still have a little more to go.

http://www.alivetuning.com/alive-bou...tion-Guide.pdf

alivetuning state only 2 psi pressure drop. If you have no inlet manifold test connection then pre i/c is all you can do!