ThreeHonks

iTrader: (10)

I see it that ported TFS 21* heads would be a poor choice for a max effort build. Just from how AI says they compare to their GM 200cc heads

kgkern01

iTrader: (10)

If you notice in their post about porting the heads, they just did basically a touch up on the heads, not a full port job on them. Out of the box they nearly flow the same as some LE2 heads and with only 185cc runners. If these are anything like the regular Trickflows they can be ported out to 215cc+ and can flow over 300 cfm once properly ported

ThreeHonks

iTrader: (10)

well it mentions in thise thread as well that the 215cc heads (23*) are the better option for max effort builds. I would think that AI would do a full port job on these heads if it was possible

BIG PURPLE

iTrader: (2)

i would recommend buying a set of AFR 220 or 227 heads. you can get what ever combustion chamber you need. i used AFR heads and the work great and thats no b/s.

ThreeHonks

iTrader: (10)

I didnt think that AFr made their 220's anymore? But the competition 227's are definately something I will be looking into

kgkern01

iTrader: (10)

Well comparing the 23* TFS to 21* TFS heads, the 21*'s should make more power in any application with comparable porting done to them. The 23's are only recommended for stroked or boosted applications NOT because they are better for porting, it's ONLY because of the larger combustion chambers allowing for a more favorable compression ratio. Anytime you take equal heads and lower the valve angle, as in this case, you allow for better airflow.

Maybe AI or LE can chime in on this and post some flow numbers for some 'fully' ported 21* TFS heads if they have done any yet.

pillarpod

after 12 pages of reading....my eyes hurt.

Purple Poncho

iTrader: (1)

If the 21* heads are just cut down 23* heads and not a all new casting then the 23* heads would have another advantage for blower guys in that the deck will be thicker.

I don't know if the 21* heads are new/different castings or not. Does anyone know?

Puck

iTrader: (17)

I remember reading that the 21* heads are all new castings, with a thinner, less boost friendly deck then the original TFS heads.

The real benefit is the out of the box, small chamber, tiny runner performance. They match many ported stockers as-cast, and surpass any ported stocker when fully ported. As a simple buy and bolt-on job on a mild 350 they will be hard to beat for the price since you don't need to spend extra money on them.

I would still get the original TFS heads or AFRs for a very aggressive build though.

pyro719

iTrader: (5)

Anybody try these yet?

TravisMcGill2000

iTrader: (2)

mine should be in this week. Should have it together by the weeked and on the dyno at the 1st off the week. I kep yall posted

pyro719

iTrader: (5)

Thanks! Travis Seems you wll be the first lol

kgkern01

iTrader: (10)

Are you putting them on out-of-the-box?

pillarpod

I'm sure he is. Once he gets them he is slapping them on then getting them dnyo...thats my take on it

TravisMcGill2000

iTrader: (2)

yes i will be running these as cast. Hope to make some goodsnumbers and even better times

slomarao

iTrader: (6)

goodluck, im very interested in the results.

JoeliusZ28

iTrader: (2)

looking forward to hearing about your experience with these

6801

i most likely am going for it too thinking about using a comp 292xfi cam

TravisMcGill2000

iTrader: (2)

update: Still waiting on the heads to come in. I order these dec.27 and still no heads. Tricklfow are saying another week. As soon as these come in I will let yall know.

6801

i clled summit and trickflow and placed a order 2 weeks ago. while waiting i was researching le2 and ai 190. while making my parts list the told me they wer in stock just got them today i let you guys know.