How high boost on 1,8TBI - Alfa Romeo Forum
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(Post Link) post #1 of 5 Old 07-10-12 Thread Starter
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How high boost on 1,8TBI

Hi all,

It goes without saying that depending on the rpm and/or gear the bar on the turbo varies but on my Spider it can vary slightly above 1,2 from time to time. Does anyone reach higher than this?
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I think one of the lads with a Guili is running 1.4 bar of boost but has a good few other mods too.
 
(Post Link) post #3 of 5 Old 14-04-13 Thread Starter
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I'm running max boost 1,6 bar.
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My car from the factory boosts 1.4 bar. no mods at all. It will normally boost to 1.3 bar but boosts 1.4 bar when a bit cooler and will hold 1.4 bar till 5000rpm.
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My car from the factory never boosted more than 1.4 bar boost. There have been some heavy speculation and in fighting which I don't want to go into right now concerning this. Even with the 1.4 peak boost I managed 267whp with only a Supersprint turbo back exhaust while monitoring the boost all the way...peak is 1.4 on my GQV and it max out at 4500-5000rpm and comes in at 2500rpm in N mode...we cannot dyno in D mode.

After my remap we only increased boost throughout the rev range and not touching peak boost or overboost...we are now starting boost just under 2000rpm and starts fading off after 5500rpm when doing rolling road dyno's with eyes firmly on boost gauge(3x different boost gagues) and 1.4 bar is reached very early...just over 3000rpm continuing to 5500rpm in D...currently running 284bhp reliably since 12000km...car is now on 55800km

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