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Home > 998cc > Safe boost levels

Staggy

64 Posts
Member #: 947
Advanced Member

New Zealand

24th Apr, 2006 at 09:24:40am

Just got a few questions.

I am currently running 8psi (This is the standard seeting) with no intercooler. The intercooler is still on the car but is going to be removed next week. Is this a safe level of boost?

Do Metro turbos have intercoolers? i have never seen one in New Zealand. From my reading on here i understand that they run 7psi.

Once i get my water/meth setup working i will be much happier and then get it all tuned up and running 14psi again.

Caution !!!! Slippery when boosting

wil_h

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9258 Posts
Member #: 123
Post Whore

Betwix Harrogate and York

24th Apr, 2006 at 09:37:00am

safe boost levels depend on a lot of things. CR, piston type, fuel octane level are just three.

You other post today suggests that you are using Avgas, what octane are you using?

You are right about the Metro turbo, no intercooler and 7psi with a CR of 9.3:1.

My old engine ran 18psi with a CR of 8.0:1 and a fuel RON of 101.

I reckon 8psi will be ok.

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Staggy

64 Posts
Member #: 947
Advanced Member

New Zealand

24th Apr, 2006 at 09:45:11am

i am using avgas. The stuff i am using is a minimum 105 octane and its full of lead as well. I am not sure of the CR. I should prolly do a compression test and get an idea. The engine was running 14psi on 96 octane with water/meth. I am trying to keep the engine for as long as possilble and will turn the boos tup when it is all sorted and tuned properly

Caution !!!! Slippery when boosting
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