Trick Flow 21 Degree LT1's - Info & Pics
#222
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
#223
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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
#226
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.
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.
#228
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?
I don't know if the 21* heads are new/different castings or not. Does anyone know?
#229
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.
#234
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#240
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.