What Boost is Safe???

[Bizz]

Hi All,

I've been doing a few searches and I was just wondering what boost people were running on average and max.

What's considered as "safe" for an LCR with standard internals and turbo?

Thanks

 

[richybigman]

Mine holds at 22psi and peaks at 25psi.

 

[BCM]

most are bout the same wioth a "normal" map i.e. revo jabba cc etc...

 

[speedsix]

Mine holds at 22psi and peaks at 25psi.

25psi!!

Mine peaks at 22, drops to 20 and then 18 until 5000rpm ish. Not sure what the standard internals are good for boost wise but I've read anything over 300bhp is time to start thinking about uprated oily bits.

 

[karlosR]

really? there are IHI conversions running near to 350bhp on standard internals.

 

[richybigman]

25psi!!

Mine peaks at 22, drops to 20 and then 18 until 5000rpm ish.

Are you stage 2 Revo? If not maybe that's the difference?

 

[Mitchy]

Mine holds at 22psi and peaks at 25psi.

Nah your boost gauge is knackered.

K04 wont hold 22psi, not a chance.

18psi around 5000rpm
15 psi around 6500rpm

Should hold 20-21psi though upto around 4500rpm.

Maybe your thinking its 'holding' 21-22 psi because your monitoring it in 6th gear and only accelerating between say 2750-4500 range where it will 'hold' that. Gives you the impression that it is holding because of the time taken to accelerate in this gear.

Try a 4th gear run, and monitor your gauge. It starts dropping significantly when you pass around 4750rpm.

The answer to your original question, 21-22psi is the norm (may spike higher). Can take the power upto 350ish on the standard rods.

 

[phoenix]

guys sorry to jump in but mine is only holding 14 psi? is that ok for standard

 

[phoenix]

I mean peaks at 14 psi and holds 12?? a little concerning when I read about figures between 18-22psi

 

[BCM]

thats high for standard mate, mine spike bout 13 and holds 11 till bout 6k and falls to 10 after that. far as i was aware mine was bang on, think you've got a wee bit more, shh tho! keep it to yourself!

 

[phoenix]

haha, with the remap coming soon and piper building a turbo back have you any idea on a rough power figure i should get

 

[BCM]

Thread hijack anyone?
anyway, you'd be better with a custom map to suit your mods.
Assuming yours is a LCR I'd expect you to get 270 no prob.

 

[phoenix]

thread hijack? no mate, just curious.. ues its a 225 LCR that figure sounds good, thanks for the info

 

[richybigman]

Nah your boost gauge is knackered.

K04 wont hold 22psi, not a chance.

18psi around 5000rpm
15 psi around 6500rpm

Should hold 20-21psi though upto around 4500rpm.

Maybe your thinking its 'holding' 21-22 psi because your monitoring it in 6th gear and only accelerating between say 2750-4500 range where it will 'hold' that. Gives you the impression that it is holding because of the time taken to accelerate in this gear.

Try a 4th gear run, and monitor your gauge. It starts dropping significantly when you pass around 4750rpm.

The answer to your original question, 21-22psi is the norm (may spike higher). Can take the power upto 350ish on the standard rods.

It holds it in 3rd 4th 5th and 6th

 

[Mitchy]

Yes but it will only hold 21-22psi or 1.5 bar boost upto around 4750rpm. Then drops quite sharply, due to small nature of turbo, punchy but weedy.

It does not hold 1.5 bar boost to the red line as your post suggests by saying ''hold''

 

[richybigman]

Yes but it will only hold 21-22psi or 1.5 bar boost upto around 4750rpm. Then drops quite sharply, due to small nature of turbo, punchy but weedy.

It does not hold 1.5 bar boost to the red line as your post suggests by saying ''hold''

The boost doesn't tail off much at all, only at about 6k i think

 

[Bizz]

I'm glad you guys are saying roughly what im seeing on mine!! holding 22psi for the majority of the rev range!! i was a bit worried about the internals being overstrained by these high boost figures. Im stage 2 Revo btw!!!

what kind of pressures are IHI's running at then??? I know its just down to boost but it plays a big part!!

thanks for your info

 

[LiCkWiD]

I've sene 1.8 bar IHIs. Mega boost. Takes an age to spool but when it does... surge!!! Saw an IHI Jetta that was around 400BHP on IHI. Niceness.