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Puny Bird
Join Date: Nov 2002
Location: Port Hope (near Toronto) On, Canada
Posts: 4,566
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A good machine shop will have a VS tester, but it only reads lbs at a certain height, no guarantee that a 40+year old spring will stay good after being pressed back in service.
I run the eibach sport spring in my 3.0 but it's fully balanced with 120/104 cam and 10.5:1CR twinplug. Be aware that the heavier springs will wear the cam components faster and they actually rob HP, one of those cases where you hope the HP gains are greater than the losses.
You're nowhere near that tune so I'd suggest sticking with the new stock springs.
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'74 Porsche 914, 3.0/6
'72 Porsche 914, 1.7, wife's summer DD
'67 Bug, 2600cc T4,'67 Bus, 2.0 T1
Not putting miles on your car is like not having sex with your girlfriend, so she'll be more desirable to her next boyfriend.
Last edited by Mark Henry; 12-07-2021 at 04:56 AM..
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