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Re: Help deciding between 750 mech and vac on my 454
Quote:
Originally Posted by americanmusc1e
have to done any testing to confirm that putting a bolt in the secondary linkage is actually an improvement?
The vacuum secondaries open on demand from airflow. If they aren't opening then you might not have enough airflow to really need them. Holley's secondary spring kit is more what you need. I'd bet that it's faster with that bolt taken out.
https://www.holley.com/products/fuel...ts/parts/20-13 |
Its definitely not an improvement. It causes a massive lean spot when you kick into the throttle. Your doing nothing but losing power.
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