1bar = crap my pants

[frozen]

so i decided to turn up my boost a couple extra pounds... well, no boost cut yet, and it HOONS compared to what it was like a couple pounds ago. and thats WITH my 80kg of subs (which i plan to downsize or sell completely... now that i own a performance car...)

Im a little panicky about like... what to look out for in engine sounds.. it does sound a little louder now (i might be imagining it) and i just dont want to blow stuff up.. but a HELL of a lot of fun.

Found myself giving it a bit of a go on the way home tonight, got LOTS of thumbs up by a heap of commodore bogans shoving heads out their car window to watch lol

 

[bradc]

Boost does indeed make a huge difference

 

[Murph]

so i decided to turn up my boost a couple extra pounds... well, no boost cut yet, and it HOONS compared to what it was like a couple pounds ago. and thats WITH my 80kg of subs (which i plan to downsize or sell completely... now that i own a performance car...)

Im a little panicky about like... what to look out for in engine sounds.. it does sound a little louder now (i might be imagining it) and i just dont want to blow stuff up.. but a HELL of a lot of fun.

Found myself giving it a bit of a go on the way home tonight, got LOTS of thumbs up by a heap of commodore bogans shoving heads out their car window to watch lol

Were you the fellow up in Townsville? Do you have a bigger intercooler? Other mods? What fuel do you run?

 

[VR-04-TT]

Hmm...looks like I might have to bar up lol

 

[Sydo]

so i decided to turn up my boost a couple extra pounds... well, no boost cut yet,

Have you tried acclerating hard in 4th from about 80-115kmph?
This is that grey area where I was getting boost cut.. Right at the highway overtaking speed.

 

[Dr_Josh001]

Hey Josh,

Is it one of those manual ball bearing boost controllers? How many PSI... was it over 15?

Good work with impressing those bomodore bogans; maybe they'll see the light after your little demo!

 

[bratwurst_boy]

1 bar of boost is 15psi, it should sound louder due to the extra work the turbos are doing to create the extra boost.

 

[frozen]

Hey, nah im not in townsville, im in brisbane (north side, but often im at the south) and as for mods, its got a 3inch mandrel bent, not sure if its turbo back or not, cant remember, but intake side is pretty stock. Just using one of those turbo tee style boost controllers.. turbosmart i think? i dont get spiking, and YES, i tried 4th gear, from about 80 to about 140 on the way home... as i said - it was fun. boost sat quite steady

 

[Guest]

Is there a generally considered "safe level" of boost for these cars???

 

[frozen]

boost cut at 15 psi usually - so id say up to that would be 'safe' till you spend enough to make more possible anyway

if you're worried just go 13, its still very nice

 

[Hotwire]

From memory, steel wheeled turbo's so I would imagine ~14psi should be fine if it stays below cut.

 

[VR4Rocket]

I thought they were ceramic...just small

 

[Guest]

No. Steel wheeled. But they are small and do have trouble maintaining large amounts of boost

 

[naughtika]

Have you tried acclerating hard in 4th from about 80-115kmph?
This is that grey area where I was getting boost cut.. Right at the highway overtaking speed.

have you tried accelerating hard in 4th from 100kph to 160kph?! it's fun stuff!! scary though..

 

[Sydo]

and YES, i tried 4th gear, from about 80 to about 140 on the way home... as i said - it was fun. boost sat quite steady

Excellent to hear! Maybe my problem is related to the spark plugs..

have you tried accelerating hard in 4th from 100kph to 160kph?! it's fun stuff!! scary though..

Can't say I have ever had to accelerate hard to 160 before.. haha.. Not yet at least. With my current setup it shouldn't be a problem. Previously however, when I was running closer to 14psi, I would get cuts every time around 3500-4000 in the rev range.

 

[bradc]

no, 3rd gear in my car at 90-130. It's scary. A stock car makes 363nm, I make about 550nm at 4000rpm, which is that speed in 3rd gear. It accelerates faster at 100 than any normal car does from rest

 

[Murph]

From memory, steel wheeled turbo's so I would imagine ~14psi should be fine if it stays below cut.

The real concern is usually running higher boost with a stock intercooler. At higher boost little turbos like ours are going to be producing very hot air. If your IC isn't big enough to be bringing that temperature down then you risk pinging and hence damaging your motor.

So how much boost your run on a stock cooler is going to depend on ambient temperature.....why I asked if he was the guy from Townsville. It's bloody hot up there most of the time (I'm from there) and I sure as hell wouldn't be running higher boost on a stock IC there. Down here on brissy on a cool night.....sure.

I'm keen to get my hands on evo data scan so I can see when the car is pinging.

 

[leebutts]

The real concern is usually running higher boost with a stock intercooler. At higher boost little turbos like ours are going to be producing very hot air. If your IC isn't big enough to be bringing that temperature down then you risk pinging and hence damaging your motor.

Have you seen the size and location of the stock cooler? It's pretty decent for a factory unit I think.

cheers

Lee

 

[Murph]

Oh for sure....pretty damn good for a stock unit, but could certainly be a lot better. My main concern was high boost in a hot climate.