So I bought my 240z with sectioned struts, tokico illumina struts and hyperco springs. My driver front was leaking so I decided to take some time this weekend and see what I actually have. My fronts are Tokico BZ3099, the common 87-89 MR2 rear struts, and my rears are Tokico BZ3015, which are 240z front strut inserts used in the rear. Since tokico is no longer available I'm thinking of just going with koni 8610's since this is mostly a track driven car at this point. The problem is in the measurements.
Below is an except from the strut sectioning sticky by John Coffey
So in the front, the koni's require about 0.55" less length than the illuminas, and the rears are the same. Koni's need to have an overall length of approx 12.9" and illumias need a total length of 13.5. The rears are the same for illuminas and konis at 15"
The problem I have is my measurements are a little off. My rear overall tube length is 15.25" with the perch at 9.5" from the bottom of the tube, and my front tube is 14" with the pearch at 8.375". My rear spring is a 10" 250lb hyperco spring, and the front is a 9" 225lb spring, both on 5" sleeves.
I have not fully removed the insert, just enough to see the part number. I have to assume there is a spacer at the bottom of each to fill the space and bring the strut insert to the gland nut. I want to drop in the Koni 8610-1437RACE inserts and increase my springs to 325f/350r rates using 10" springs as listed in the faq.
Does that sound feasable or will I need to section my struts again to get the proper length?