Quote:
Originally Posted by HawkBrosMav
Serious question on the factory turbo setups...
I know on all these new blown setups they watch the pulley size.. or at least check the the pulley is engraved the correct diameter. How do they keep the boost numbers in check on the turbo cars? I've heard of these deals driving to the track with headers, a little extra boost, and a tune and running in the 10's....
Brad
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There is no boost limit in Stock/SS.
There is a spec on compressor wheel diameter and compressor housing diameter.
When my turbo gets checked out during tear down a set of inside calipers are used to check the inlet diameter.
NHRA specs say a max of 2 mm diameter over stock.
NHRA has this 2015 Mustang sheet listed as a 2017 but it shows the turbo specs
edit to add the spec book wording on turbos...
TURBOCHARGERS
Turbocharger size will be verified by measuring the housing
bore at the leading edge of the impeller wheel. The maximum
diameter of the housing bore at the leading edge of the wheel
may not exceed 2mm more than the maximum allowable
turbocharger size permitted.