Does a 10lb spring on a 60 trim equal 10lbs on a T67?
07-13-2008, 02:05 PM
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Does a 10lb spring on a 60 trim equal 10lbs on a T67? Just curious if the same spring in the wastegate after a bigger turbo swap will net the same amount of peak boost...?
Also on a 2 bar tune, would upping the boost 2lbs need complete retuning or can the computer make up for the added air?
Also on a 2 bar tune, would upping the boost 2lbs need complete retuning or can the computer make up for the added air?
07-13-2008, 04:36 PM
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Same spring will probably mean the same pressure... But there are alot of factors there.
On the 2 bar thing... i think you'll just need to get it re tuned above your previous high boost level. You may need to look at the tune below that point anyway to make sure nothing changed with the swap of turbos.
On the 2 bar thing... i think you'll just need to get it re tuned above your previous high boost level. You may need to look at the tune below that point anyway to make sure nothing changed with the swap of turbos.
07-14-2008, 01:44 AM
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well yea the bigger turbo would be capable of boosting more because its exactly that, BIGGER. But the wastegate will still want to "slow it down" to stay at the whatever its boost spring is rated for. The wastegate will hold whatever boost it has according to the spring it has inside no matter what. A change in turbo's like what you're doing wont affect it at all really, it will still hold peak boost depending on the wastegate spring. If its 8psi spring it will still hold 8psi simple as that. Only time you will have to worry about getting a bigger wastegate because it spikes or cant handle the exhaust flow is if for example if you go with a HUGE turbo on a 38mm wastegate. And i mean huge as in "bigger than a 76mm turbo" huge...dont sweat it man, good luck with the upgrade! 
