Going back to my 76 GTB rear indicator lenses, I finally got around to checking both and they were manufactured by SIEM, numbered 9255, SAE I 74 DOT. This suggests to me they are original, including the one I purchased from Cavallino in 2009 (?) My brake lenses are however are mismatched which I knew about. One appears to be original and labelled SIEM 9252 SAE ST 74 DOT and has a single globe, the other is a Carello lens with the twin globe form a later 308. If anyone knows where I can get the correct single globe variety please let me know. Thanks
So despite what the specs say, my car actually had 150lb springs in the front and 160lb in the rear. No wonder it was like driving marshmallow.
So you meant that was what they were actually rated at (i.e. marked?) or did you get them tested to determine that?
nah...i chickened out. they recommended 30% increase in the springs and revalving front shocks and tightening rear. This was determined after checking springs, dynoing shockers, meeting my requests (ride height etc) and measuring suspension angles etc.
oh...and if your springs are standard, then yes, I suspect they'll be the same....but maybe they got the aussie spec wrong and the euro spec right on that sheet, which claims 200lb springs front and rear. I'll compare the rest of the spec of the spring when i get them back.
my front springs were running at 160, put them back to factory specs, 200 front 185 rear, which seems strange as the engine is at the rear
Could be why it won't turn corners Morett's. If it's too stiff at the front end you'll probably experience understeer, hence front spoiler damage. Only IMO opinion of course.
errrrrrrrr that makes no sense. 160 front IS standard, but the rear is meant to be harder. Who's giving you crap advice? You probably.
Remember there is the spring rate, that's as you simply measure the spring. Then there is the effective spring rate with the spring/damper unit installed. On a 308, the spring/damper unit doesn't have the same pick up points. It's further outboard on the rear from memory.
Well here we go...despite the ferrari bulletin rating our spring at 200lb/inch it seems that using any amount of calculators on the net give a front rating of 166lb/inch and a rear of 169lb/inch. pretty much exactly what they were measured as. http://guzzitech.com/springrate.html
That's very interesting. My only question is they are assuming that the springs are made from the same material based on the inputs in that formula. I would have thought there would be many different varaiants on the spring steel used?? So for example you could have 2 springs with the same diameter and same number of coils but different spring steel compound hence giving a different lb/inch result? I don't know the answer, just asking the question. Any comments from someone who knows. Perhaps I should ask Horse, no time to look up Google.
