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FE Power Forums => FE Technical Forum => Topic started by: Jb427 on January 22, 2022, 08:32:15 AM

Title: C6 flex plate what to get
Post by: Jb427 on January 22, 2022, 08:32:15 AM
What is a good flexplate for a c6 fe 600 to 700 hp rating?
Title: Re: C6 flex plate what to get
Post by: KMcCullah on January 22, 2022, 09:15:50 AM
This is the one in the red truck:

https://www.summitracing.com/parts/ati-915702

It's taken quite a bit of hard use. Torque converter flashes at 5600rpm.

 https://www.youtube.com/watch?v=Kt7xTs2soBk
Title: Re: C6 flex plate what to get
Post by: Rory428 on January 22, 2022, 10:28:49 AM
Not sure wheat ET level that  NHRA mandates a SFI flexplate, as I haven`t raced an automatic transmission car in well over 20 years now, but back when I ran a C6 in my Fairmont, I used a factory 428 flexplate , and never had any issues with it. That was over 10 years of WOT transbrake launches at 5200 RPM, with low 1.4-high 1.3 60 foot times, running mid 10s in the 1/4 mile. And that flexplate was just a stock unit from one of my 428 cores, so it was likely over 30 years old at the time.
Title: Re: C6 flex plate what to get
Post by: shady on January 22, 2022, 10:47:00 AM
FTI told me that a stock Ford FP was good to go for my 550 hp 7k 390..
Title: Re: C6 flex plate what to get
Post by: Jim Comet on January 22, 2022, 09:32:46 PM
I'm pretty happy with my Reactor flex plate. HD aluminum, nice SFI piece. Jim
Title: Re: C6 flex plate what to get
Post by: Jb427 on January 22, 2022, 10:41:21 PM
This is the one in the red truck:

https://www.summitracing.com/parts/ati-915702

It's taken quite a bit of hard use. Torque converter flashes at 5600rpm.

 https://www.youtube.com/watch?v=Kt7xTs2soBk

Dose that Ati one you listed need the adapter and ati bolts?

I'm pretty happy with my Reactor flex plate. HD aluminum, nice SFI piece. Jim

Do they do a steal one? they look nice i don't really need a light weight one for what i am doing they have no prices on there web site how much did that cost you Jim?

Cheers.



Title: Re: C6 flex plate what to get
Post by: KMcCullah on January 23, 2022, 09:43:25 PM
This is the one in the red truck:

https://www.summitracing.com/parts/ati-915702

It's taken quite a bit of hard use. Torque converter flashes at 5600rpm.

 https://www.youtube.com/watch?v=Kt7xTs2soBk

Dose that Ati one you listed need the adapter and ati bolts?

Cheers.

Yes sir forgot the adaptor flange:

https://www.summitracing.com/parts/ati-915611

I ended up using low profile ARP bolts due to torque converter interference.
Title: Re: C6 flex plate what to get
Post by: manofmerc on January 24, 2022, 04:19:43 AM
Look into ATIs flex plate . It is a tough dude expensive but well worth it .They have one for 428s as well (external balance )Doug
Title: Re: C6 flex plate what to get
Post by: Falcon67 on January 24, 2022, 11:37:26 AM
>Not sure wheat ET level that  NHRA mandates a SFI flexplate,

I only buy SFI rated flex plates, even for a 300 HP 302.  They are not that expensive, IMHO.   In the race cars of course, nothing less. 
Title: Re: C6 flex plate what to get
Post by: Jim Comet on January 24, 2022, 10:56:07 PM
The Reactor flex plate set me back about $450. I bought mine through Blair. Jim
Title: Re: C6 flex plate what to get
Post by: blykins on January 25, 2022, 07:29:32 AM
ATI, Performance Automatic, or JW.   

I have a JW flexplate for the dyno.  I've had it on 1200 hp engines.
Title: Re: C6 flex plate what to get
Post by: Jb427 on January 25, 2022, 08:53:17 AM
Thanks everyone for the help

I also need a separator plate and dust cover for c6 to fe dose anyone remake these?
Title: Re: C6 flex plate what to get
Post by: thatdarncat on January 25, 2022, 01:35:36 PM
Thanks everyone for the help

I also need a separator plate and dust cover for c6 to fe dose anyone remake these?

The C6 inspection cover/dust cover is reproduced, should be able to find it at any of the reproduction parts companies. They turn up used occasionally.

I’m not aware of a reproduction of the separator plate/spacer plate, but they are generally easy to find. You might want to run a wanted ad on the page here, or let people know your general location, they could be one local to you. I’ll send you a message.