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| | |-+ Do I need SFI rated flexplate?
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Author Topic: Do I need SFI rated flexplate?  (Read 1093 times)
Small Block
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Posts: 173

Location: Littleton NH

« on: September 18, 2016, 07:52:24 pm »

Is an SFI rated flexplate better than a non rated one? I dont plan on hitting the drags all that often, maybe a few times a year. Car will be on street tires. Engine is being built as a 408w, but its got 3.27 gears and 275-60 bfg's

I am just concerned that I will buy one thats SFI rated and either not need it, or not need it til its expired.....

Thanks guys
Big Block
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Posts: 1617

Location: fort worth,tx.

« Reply #1 on: September 18, 2016, 10:07:13 pm »

Big Block
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Posts: 1916

Location: Topeka, KS

« Reply #2 on: November 18, 2016, 02:04:25 pm »

  I have several that are outdated.  The time frame is 5 years until expires and I would imagine you should remove and rebuild the converter and trans along with a new flexplate, BUT order and receive the fp and compare with one removed for crank to converter height!  Just in case it changes    WTF which it does Whistling

I imagine if rpm's are kept below 8,000 but if you go over 6,000 you might consider a BlowProof Bellhousing.  I have a JPW which is kinda bulky and starter nose hit on mine.  There are some more available and are lighter and thinner for clearance issues.

Oh, by the way you might need a tranny blanket/cover.  I use the bent aluminum ones like from TCI (sometimes cover don't fit boltholes good and I use a countersink to move).  I have replaced in our 64 Falcon but is tight.

I am adding a tip on the 4 bolts on the servo.

Son's 412W Build Information;
Son's '64 Falcon Performance Information;
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