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LT1 TFS head issue...bad casting?

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Old Jul 26, 2006 | 09:21 AM
  #46  
Randy Molkentine's Avatar
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Re: LT1 TFS head issue...bad casting?

Got the heads to TFS and it turned out to NOT be an issue with the heads. It was actually a odd issue with the rockers studs not seating correctly in the bosses. They are fixed now and on the way back to Speed Inc. Thanks again to Larry and the crew at Speed Inc for the high level of quality control and to Artie and his crew at TFS for taking the time to examine the parts and figure out a solution. Both TFS and Speed Inc put the customer first and the help from TFS customer service is first class. Both are top notch companies to work with
Old Jul 26, 2006 | 12:12 PM
  #47  
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Re: LT1 TFS head issue...bad casting?

Man I'm glad to hear that
Old Jul 26, 2006 | 01:33 PM
  #48  
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Re: LT1 TFS head issue...bad casting?

How did they fix them?
Old Jul 26, 2006 | 07:51 PM
  #49  
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Re: LT1 TFS head issue...bad casting?

well they didn't fix the heads they modified the studs to work correctly.
Old Jul 27, 2006 | 06:48 PM
  #50  
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Re: LT1 TFS head issue...bad casting?

Hmm, thats odd. But I am glad to hear they helped you out with the problem. You should try to get some more info on teh specific problem here and post up. I am sure many people are curious and it could help someone out at a later date.

BTW, I think I am going to buy a set of TF heads in the near future. Its nice to know they stand behind their work!

Props to both Speed Inc and TF!
Old Jul 27, 2006 | 09:11 PM
  #51  
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Re: LT1 TFS head issue...bad casting?

If the stud didn't seat correctly it's because the threads were cut in the head at an odd angle.
But no matter ya got it fixed and that's what counts.
Old Jul 28, 2006 | 12:12 AM
  #52  
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Re: LT1 TFS head issue...bad casting?

What type of studs are you using?

1RacerDude ~ I thought that but didnt say it cause I wasnt 100% sure ... I was sitting here thinking It HAD to be the threads cut wrong.
Old Jul 28, 2006 | 12:18 AM
  #53  
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Re: LT1 TFS head issue...bad casting?

The important thing is that they are fixed?.....but like LR said the only thing possible is that the threads were messed up.

They modified the studs? How?
Old Jul 28, 2006 | 12:27 AM
  #54  
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Re: LT1 TFS head issue...bad casting?

Originally Posted by HardcoreRM125
What type of studs are you using?

1RacerDude ~ I thought that but didnt say it cause I wasnt 100% sure ... I was sitting here thinking It HAD to be the threads cut wrong.
I use shaft rockers,but on other builds I use ARP.
Old Jul 29, 2006 | 08:24 PM
  #55  
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Re: LT1 TFS head issue...bad casting?

I spoke with Trick Flow and was informed that the problem was due to the rocker studs not having a shank under the hex portion to locate the guideplate.

I can't visualize how that would cause the rocker stud to deviate from vertical (in relation to the threads), but they said installing studs with a shank underneath the base hex portion solved the problem. (they also measured all of the cylinder head dimensions which were correct).
Old Jul 29, 2006 | 08:30 PM
  #56  
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Re: LT1 TFS head issue...bad casting?

Originally Posted by INTMD8
I spoke with Trick Flow and was informed that the problem was due to the rocker studs not having a shank under the hex portion to locate the guideplate.

I can't visualize how that would cause the rocker stud to deviate from vertical (in relation to the threads), but they said installing studs with a shank underneath the base hex portion solved the problem. (they also measured all of the cylinder head dimensions which were correct).
I want some of what the TFS rep was taking.He is a frigging idiot,thinking you would believe anything.
Old Aug 1, 2006 | 02:20 AM
  #57  
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Re: LT1 TFS head issue...bad casting?

Originally Posted by 1racerdude
I want some of what the TFS rep was taking.He is a frigging idiot,thinking you would believe anything.
Agreed!!

Obviously total bull $hit, but oh well. Of course the guys at Trick Flow can't say, "..........yeah, we screwed up these heads when we were machining the rocker stud bosses.........."

I'm willing to bet that there are more than just this pair out there floating around with the same issues. Sad, but this is the typical quality slide associated with a good company that's purchased by a much larger company. *cough* *cough* Summit Racing *cough* *cough*
Old Aug 4, 2006 | 10:16 AM
  #58  
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Re: LT1 TFS head issue...bad casting?

Did the package go back together ok? Im curious to what kind of power it put down.
Old Aug 4, 2006 | 01:55 PM
  #59  
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Re: LT1 TFS head issue...bad casting?

Originally Posted by My Iroc Z28
Did the package go back together ok? Im curious to what kind of power it put down.
I'm curious too...so +1
Old Aug 4, 2006 | 07:47 PM
  #60  
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Re: LT1 TFS head issue...bad casting?

Originally Posted by Colin91Z
I'm curious too...so +1
Me +2



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