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930-3,3 78 0.8 to 0.9 boost ??

Hello. How many Hp. it will provide. going from 0.8 to 0.9 boost pressure with standard inter-cooler??

Regards john

Old 10-03-2010, 11:15 AM
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it should give you + 20 HP IMO ?
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Last edited by Tomy; 10-04-2010 at 10:22 PM..
Old 10-03-2010, 12:06 PM
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.9 bar plus atmosphere (1.9) is 6% more than .8 bar (1.8).

Thus up to a max of 6% more hp it that is the only change.

However it is often less if efficiencies are falling off somewhere like going out of your turbos efficiency range or if the intercooler can not accommodate the increased heat and air flow.

Thus, if it is a stock 260hp car that is up to 16hp. If a 400hp car up to about 24hp.
Old 10-03-2010, 12:29 PM
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John,

There is really now way to tell how much HP would be gained, other than running on a Dyno.

I would tell you there are several things that should be done before even considering raising the boost. Verify you have, at least , a European exhaust system and free flow muffler, check correct operation on the CIS system and varify afr's across the rpm range, check the distributor advance and, especially.
retard functions are correct and operating properly, check timing is in spec, add
a larger aftermarket intercooler.

Many may disagree but over-boosting can easily cause fatal damage
if the engine is not modified to accommodate higher boost levels.


Cole
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Old 10-03-2010, 12:32 PM
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check correct operation on the CIS system ??How do I check it. I must remember to say I run with B & B exhaust/muffler


sincerely john
Old 10-04-2010, 11:26 AM
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Quote:
Originally Posted by 911st View Post
.9 bar plus atmosphere (1.9) is 6% more than .8 bar (1.8). Thus up to a max of 6% more hp
Thus, if it is a stock 260hp car that is up to 16hp. If a 400hp car up to about 24hp.
Wouldn't it be nice if hp equations were that linear.
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Old 10-04-2010, 11:36 AM
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Turbos love higher octane fuel ( leaded 110 octane without catalitic converter) as a safety margin when adding more boost with the other upgrades mentioned above. Adjustable boost control when changing from high to standard octane levels if you can resist the temptation not to overdo it. Burnt innards can result if not readjusted between fuel octane being used.

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Old 10-04-2010, 02:41 PM
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