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Author Topic:   Twisted Wedge "R" heads
Mpcoluv
Gearhead

Posts: 1278
From: Charlotte NC usa
Registered: Apr 2001

posted 04-22-2001 08:29 AM     Click Here to See the Profile for Mpcoluv   Click Here to Email Mpcoluv     Edit/Delete Message   Reply w/Quote
Hi Guys,
Why are the TFS R heads unpopular? They look like a pretty good deal for the money.
Is there a Quality problem with them?

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Dave_C
Gearhead

Posts: 968
From: Gadsden, Al
Registered: Aug 99

posted 04-22-2001 05:38 PM     Click Here to See the Profile for Dave_C   Click Here to Email Dave_C     Edit/Delete Message   Reply w/Quote
Here's my take on the TFS heads, both regular and the "R" versions.

The heads flow great, no question about that. But to take advantage of the flow you need a big cam. To use a big cam with any of the TFS heads requires pistons that are specific to those heads.

All TFS heads have relocated valves that don't match the valve relief pockets in regular pistons. You have to have pistons with the valve reliefs moved to match the new location.

Not sure on exactly how big a cam can fit with stock type pistons, but I think it is ~290 adv duration and .540 lift. Don't know about .050 duration, but the 290 adv is what is in the specs from TFS. Anything with less than .600 lift and [email protected] .050 witht he R heads is a waste.

Later,

David Cole

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JAAZZY
Gearhead

Posts: 777
From: Bay Area, CA
Registered: Apr 2001

posted 04-23-2001 01:08 PM     Click Here to See the Profile for JAAZZY     Edit/Delete Message   Reply w/Quote
The "R" heads flow well but are more than what most street small blocks need. I hear that low end response suffers. They are designed for high rpm applications and thus don't do well on the street.

I have the TFS Street Heat heads. They were difficult to use because the exhauast ports were raised to increase the flow and they work great but because of the changes they wouldn't just bolt up to the existing exhaust. Even with the .530 lift cam I was running I needed to notch the pistons further. My new setup uses pistons specific for this application.

For my 65 I needed special headers and even then it took me a whole weekend getting them to fit. I needed the help of an exhaust shop to heat up and dent numerous areas so they would work.

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65 Stang - TFS SH Stage III Heads, Nash 5 speed, Fuel Injection, etc...
2001 - Z06

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Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 04-23-2001 06:14 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
I concur with both explanations. The TW heads are more competion specific and require many specialized related componants making their use more costly vs other available products. The performance gain is also negligable over Canfield or Edelbrock Victors. Dollar for dollar there are more viable alternatives.

------------------
Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

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Mpcoluv
Gearhead

Posts: 1278
From: Charlotte NC usa
Registered: Apr 2001

posted 04-25-2001 07:51 PM     Click Here to See the Profile for Mpcoluv   Click Here to Email Mpcoluv     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Moneymaker:
I concur with both explanations. The TW heads are more competion specific and require many specialized related componants making their use more costly vs other available products. The performance gain is also negligable over Canfield or Edelbrock Victors. Dollar for dollar there are more viable alternatives.

Well I was thinking about a 427 stroker or so. All really high flow aftermarket ford heads need some specialized components....


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