• Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech

SHOULD I BUY A SFI RATED FLEXPLATE

  • Thread starter Thread starter danny clemens
  • Start date Start date Jul 9, 2007
D

danny clemens

Member
May 4, 2005
728
0
16
Jul 9, 2007
#1
  • Jul 9, 2007
  • #1
I'm building a 408 stroker. It won't be raced very much or turn real high rpm's. Should I buy a SFI rated flexplate or use a stock one I have that was behind a 69 302. Since they're not very expensive I'd rather buy one now if I need another one. If you think I need a new one which brand would you recommend?
 

coolblue65

Founding Member
Jul 26, 1999
1,224
2
39
Algonquin, IL
Jul 9, 2007
#2
  • Jul 9, 2007
  • #2
If your building for that kind of power I would just put a SFI one in. Its better to be safe then sorry.
 

iskwezm

10 Year Member
May 24, 2005
4,159
20
79
Rowland Heights,California
Jul 9, 2007
#3
  • Jul 9, 2007
  • #3
your already there,do it. I know 2 buddys that lost a ring gear and it ripped through the bell housing and one through the hood and floor.One was racing and one was just cruising(i was in that car and it like a bomb went off under the hood.)
 

rbohm

Founding Member
Apr 12, 2002
6,698
550
204
tucson,az
Jul 9, 2007
#4
  • Jul 9, 2007
  • #4
since you are there, you may as well make sure you dont have to go back and fix something that broke when you could have avoided it.
 
D

danny clemens

Member
May 4, 2005
728
0
16
Jul 10, 2007
#5
  • Jul 10, 2007
  • #5
Thanks for the replys. It sounds like it is unanimous. Has anybody used any of the cheap ones that are sold on ebay? I didn't see a brand on them but they may be a name brand rebadged and sold cheaper. Anybody know? I just don't want to buy one and my machinist tells me it is way out of balance and that'll cost more $$. Would you guys buy the cheap one or spend more for a name brand?
 
1

10secgoal

Active Member
Dec 1, 2003
2,801
3
49
San Diego
Jul 10, 2007
#6
  • Jul 10, 2007
  • #6
look in a summit racing magazine, i believe they sell TCI's which is a good brand and they are not very expensive.

just get the correct balance for your application... http://store.summitracing.com/partdetail.asp?part=TCI-529620&autoview=sku
 

jcode68

Active Member
Jul 15, 2003
892
1
29
Massachussetts
Jul 10, 2007
#7
  • Jul 10, 2007
  • #7
I'll share my experience with buying the cheap eBay deals... Don't do it! I bought a new SFI rated 28oz billet steel FW for $98 because I figured, hey they are all the same and are rated at 28oz, so why spend the extra cash... Bad decision. I had a really bad engine vibration that I ultimately traced to the flywheel. I replaced the FW with a Ford Racing piece that cost $250, but I no longer have a vibration problem, so worth it. The quality between the 2 pieces were night and day. The cheap FW had the counter weight welded on very poorly with messy welds. Hole were not chamfered etc. I spent more time & energy chasing this problem, ripping out the trans, clutch etc. Lesson learned, when building anything you care about, only use the good stuff
 
D

danny clemens

Member
May 4, 2005
728
0
16
Jul 13, 2007
#8
  • Jul 13, 2007
  • #8
Thanks again for the info. Pretty much what I figured but I wanted to make sure. None of the ebay converters for me.
 
You must log in or register to reply here.

Similar threads

F
Ford 460 swap
  • Ford460
  • Sep 13, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
6
Views
352
1996 - 2004 SN95 Mustang -General/Talk- Sep 14, 2026
Ford460
F
Progress Thread Progress Thread- From6to8's 95 GT/Saleen Supercharged 331 install
  • from6to8
  • Mar 22, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
27
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Sep 28, 2026
from6to8
T
Drivetrain TREMEC TKX 1–2 Grinding Issue at ~4,000 Miles + Poor Warranty/Customer Service Experience
  • Ttopfoxguy
  • Oct 10, 2026
  • Fox 5.0 Mustang Tech
Replies
5
Views
208
Fox 5.0 Mustang Tech Oct 15, 2026
JMG9350
J
T
Which to keep 1979 Ford Mustang or 2013 VW Jetta TDI Sedan
  • toasterboy1
  • Sep 13, 2025
  • Off-Topic Hangout
Replies
4
Views
95
Off-Topic Hangout Sep 14, 2025
toasterboy1
T
X
VE Table Not Dialed? Send Me Your Datalog.
  • X-cam34
  • Feb 8, 2026
  • Digital Self-tuning Forum
  • 2 3
Replies
49
Views
2K
Digital Self-tuning Forum May 1, 2026
X-cam34
X
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?