Well 20 psi certainly made a difference!!

[Ryan S]

Still unsure why it's so much faster spooling... so weird.

because you've disabled the tvsv, it normally limits the boost in 1st and 2nd gear, when it's disabled, you get full whack. there is now nothing limiting the speed that the boost comes in at. it makes such a massive difference. should feel it on a rev3

[Ryan S]

although at 20psi you were probably putting down about 400bhp

[moscoworbust]

Still unsure why it's so much faster spooling... so weird.

because you've disabled the tvsv, it normally limits the boost in 1st and 2nd gear, when it's disabled, you get full whack. there is now nothing limiting the speed that the boost comes in at. it makes such a massive difference. should feel it on a rev3

Nah, when i disabled the VSV and I had the MBC installed initially it was really slow to spool, like it was before i did that.

I had the MBC screwed all the way in and was only seeing 10 psi, at any MBC setting.

Then i turned it again, still slow spool and 10 psi.

Then I took off from some lights and BOOM! 20 psi and instant spool.

I guess the MBC was letting gas past or something and fixed itself by dislodging the spring/ball.

Fun though.

[moscoworbust]

although at 20psi you were probably putting down about 400bhp

Awesome.

[Ryan S]

i'd honestly take it apart and cut a couple of coils off and stretch it, no offence to GTS chris but those controllers are put together like sh*t, the springs are far too big and get caught on the threads etc. there's just too much metal (the spring part) in there for anything to be able to function properly. they are a primitive device but they do work well

[moscoworbust]

i'd honestly take it apart and cut a couple of coils off and stretch it, no offence to GTS chris but those controllers are put together like sh*t, the springs are far too big and get caught on the threads etc. there's just too much metal (the spring part) in there for anything to be able to function properly. they are a primitive device but they do work well

oik mate.

It seems to be working atm, i'll wind it out to 14 psi.

If i have any more issues I will definitely follow your advice.

Thanks

[Magic Beans]

although at 20psi you were probably putting down about 400bhp

If only it were that easy to hit 400bhp

[Ryan S]

although at 20psi you were probably putting down about 400bhp

If only it were that easy to hit 400bhp

haha, yeah a slight exaggeration but couldn't have been far off, not a reliable 400bhp by any means, i can be sure there would have been some knock running that boost on pump fuel and a standard ECU

[Ryan S]

It seems to be working atm, i'll wind it out to 14 psi.

my old rev 2 ran 14psi with a MBC (plus all basic breathing mods) for my entire 5 year ownership and never had a problem once, easily the most reliable car i've ever had, it always puzzled me why toyota never let it come out the factory like this (other than noise/emission restrictions).

[Marsh]

I recently fitted a digital boost gauge to my rev1 because i am going to install a mbc but my rev 1 already boosts to 12 in 1st and 2nd then 14 in 3rd and 4th?? (Psi)

[Ryan S]

I recently fitted a digital boost gauge to my rev1 because i am going to install a mbc but my rev 1 already boosts to 12 in 1st and 2nd then 14 in 3rd and 4th?? (Psi)

possibly has an aftermarket ECU, blitz etc....Check the ecu in the boot, it'll be fairly obvious. or it may have a boost controller installed, but that'd be really obvious just by looking in the engine bay

[Marsh]

I recently fitted a digital boost gauge to my rev1 because i am going to install a mbc but my rev 1 already boosts to 12 in 1st and 2nd then 14 in 3rd and 4th?? (Psi)

possibly has an aftermarket ECU, blitz etc....Check the ecu in the boot, it'll be fairly obvious. or it may have a boost controller installed, but that'd be really obvious just by looking in the engine bay

Unfortunately it has neither :/ i will be fitting a MBC this weekend though

[jimGTS]

although at 20psi you were probably putting down about 400bhp

If only it were that easy to hit 400bhp

haha, yeah a slight exaggeration but couldn't have been far off, not a reliable 400bhp by any means, i can be sure there would have been some knock running that boost on pump fuel and a standard ECU

nowhere near 400...
maybe 260-280hp at a push at 1.4bar
probably a bunch of torque ie 300+lb, but considering the ct26 cant hold more than 12-13psi to redline, 20psi would have soon turned into 12psi anywhere close to redline.

[Ryan S]

I recently fitted a digital boost gauge to my rev1 because i am going to install a mbc but my rev 1 already boosts to 12 in 1st and 2nd then 14 in 3rd and 4th?? (Psi)

possibly has an aftermarket ECU, blitz etc....Check the ecu in the boot, it'll be fairly obvious. or it may have a boost controller installed, but that'd be really obvious just by looking in the engine bay

Unfortunately it has neither :/ i will be fitting a MBC this weekend though

then i've no idea why it's running that boost

[Marsh]

possibly has an aftermarket ECU, blitz etc....Check the ecu in the boot, it'll be fairly obvious. or it may have a boost controller installed, but that'd be really obvious just by looking in the engine bay

Unfortunately it has neither :/ i will be fitting a MBC this weekend though

then i've no idea why it's running that boost

Nah me either im not complaining as my mates 350 bhp skyline cant pull away

[moscoworbust]

I recently fitted a digital boost gauge to my rev1 because i am going to install a mbc but my rev 1 already boosts to 12 in 1st and 2nd then 14 in 3rd and 4th?? (Psi)

I found the same on my rev 1 turbo before I fitted the MBC.

Something is going on.

I'm running 21 psi now, can't seem to turn it down. Well, I can't be bothered. I'll fix it soon.

[Kinsy]

'I cant be bothered, I'll fix it soon?'

Do you like driving your car because it will soon be very broken with 21PSI boost. I would be removing it and plumbing the TVSV back in until you fixed your wastegate...

[Ryan S]

the tvsv not being disconnected may well be the problem IIRC the MINIMUM boost the car will run without it disconnected is 14psi.

[asdrewq]

It seems to be working atm, i'll wind it out to 14 psi.

my old rev 2 ran 14psi with a MBC (plus all basic breathing mods) for my entire 5 year ownership and never had a problem once, easily the most reliable car i've ever had, it always puzzled me why toyota never let it come out the factory like this (other than noise/emission restrictions).

Driveability i'd guess. Didn't think the populous could handle 1bar in 1st gear

Or they were concerned about the monster torque wearing the drivetrain prematurely.

[cvega666]

MBC's + already very vulnerable to creep CT26 = neverending boost problems. Mine never stopped creeping, always required very alert right foot, a decent EBC (gizmo, so not breaking the bank) sorted and it was rock solid.