B5234T3 Max safe boost ?

[M-R-P]

So a question for those more knowledgeable than myself...

What would be considered the maximum safe boost level on my engine before things go crunch.

3rd generation 2.3 T5 with 16t and 197k miles on it.

I've been fiddling with MBC and TCV combinations and saw an unexpectedly large number on the boost gauge, at which point, I let off the loud pedal.

[oblark]

I would say about 15 psi

[t5 pete]

All depends on how the boost comes in aswell what boost are you running at the min i bent a rod with 18/19psi

[T5frankie]

17psi

[M-R-P]

All depends on how the boost comes in aswell what boost are you running at the min i bent a rod with 18/19psi

I've been running 16psi for a while now, which droppes off after a while. I've been trying to keep the boost on longer so I've been fiddling about with a new bcs and the mbc in - line. I won't just floor it as I'm well aware of the 3k rule, so I waited till 30mph in 2nd and gave it a bootful, the boost came straight on and hit about 18psi before I backed off. It didn't look like it had finished either.
By hell did it move!
But obviously, I've not achieved anything tho.

[T5frankie]

i never booted mine till after 4k but still bent rods

[claymore]

I was boosting mine to 22psi and still couldn't bend the rods

[volvokid]

If your cars mapped correctly you shouldnt have to give a hoot when you boot it.

[M-R-P]

i never booted mine till after 4k but still bent rods

You're just to butch with the go pedal Frankie

I was boosting mine to 22psi and still couldn't bend the rods

With a 16t?

If your cars mapped correctly you shouldnt have to give a hoot when you boot it.

Mapped? the car hasn't tried to protect itself yet so maybe plod did something...?

[oblark]

Mapped? the car hasn't tried to protect itself yet so maybe plod did something...?

You can bet your cars been mapped

[claymore]

With a 16t?

No, with a gt28

[M-R-P]

You can bet your cars been mapped

Here's the thing - plod don't normally map the T5s as they consider them fast enough but so many things point to it not being standard. You've been in it mate so you'd have a better idea than me. The only other T5 I've been in is Graham's and that's been mapped but because the gearing is different, it was hard for me to make a comparison (if anything, his 3rd felt a bit slower but again - gearing)

I've been in Wayne's V70 but there was no "fast" driving going on.

[T5frankie]

I was boosting mine to 22psi and still couldn't bend the rods

and still only 14.7 lol

[M-R-P]

No, with a gt28

My little 16t went from negative boost to 18psi in a second, maybe 2. Poor little thing has done 197230 miles

Gonna back it all off tomorrow and see if I've done something silly like connect the MBC backwards lol.

[oblark]

Here's the thing - plod don't normally map the T5s as they consider them fast enough but so many things point to it not being standard. You've been in it mate so you'd have a better idea than me. The only other T5 I've been in is Graham's and that's been mapped but because the gearing is different, it was hard for me to make a comparison (if anything, his 3rd felt a bit slower but again - gearing)

I've been in Wayne's V70 but there was no "fast" driving going on.

I think it`s had mild map but you will find out more when you put it on the dyno

[LiamT4]

Here's the thing - plod don't normally map the T5s as they consider them fast enough but so many things point to it not being standard. You've been in it mate so you'd have a better idea than me. The only other T5 I've been in is Graham's and that's been mapped but because the gearing is different, it was hard for me to make a comparison (if anything, his 3rd felt a bit slower but again - gearing)

I've been in Wayne's V70 but there was no "fast" driving going on.

Grow a pair and get it on the 1/4mile, then you'll know how quick it really is ;-)

[M-R-P]

Grow a pair? I did mate and then my wife quite publically cut them off lol

[M-R-P]

Well to conclude, I wound the MBC back a bit and she's back to normal - sort of.

She boosts to 16psi, as before and still drops down after a while BUT it takes longer to drop down to 10psi spools up faster, so there's a nice, new lump of torque to play with. Much to the utter annoyance of a noisy Type-R driver last night.

It's weird how the new BCS caused so much boost when the MBC was still set at the same level, especially when, without the MBC, the BCS only gives 9psi which is what the original one produced.

Any-hoo, it's all working now - to a fashion.

I need a remap!

[iancho]

I've been running 16psi for a while now, which droppes off after a while. I've been trying to keep the boost on longer so I've been fiddling about with a new bcs and the mbc in - line. I won't just floor it as I'm well aware of the 3k rule, so I waited till 30mph in 2nd and gave it a bootful, the boost came straight on and hit about 18psi before I backed off. It didn't look like it had finished either.
By hell did it move!
But obviously, I've not achieved anything tho.

Sorry to hijack Martin but what is this 3k rule? and why is Frankie waiting until 4k?

[mikey32shaw]

^^^^^ was going to ask this myself :-)