New Trick Flow 21 Degree LT1 Heads
01-13-2010, 11:14 PM
#101
The heads we are running they chose to start with the 23 degree castings, werent sure if they could do the same port on the 21 degree castings
Id be REALLLY interested to see a LTx casting at a measured 203cc that moves 300 cfm of air for real. Send me one, and Ill use that head on every LT1 I build from now on.
01-13-2010, 11:52 PM
#102
TEA doesnt believe this is hugely different potential in the 2 degree rollover, they have said that the gains are more due to the new CNC chamber design and valvejob area, not insofar as much the 21degree'ness
The heads we are running they chose to start with the 23 degree castings, werent sure if they could do the same port on the 21 degree castings
The heads we are running they chose to start with the 23 degree castings, werent sure if they could do the same port on the 21 degree castings
Id be REALLLY interested to see a LTx casting at a measured 203cc that moves 300 cfm of air for real. Send me one, and Ill use that head on every LT1 I build from now on.
I just want to know the max potential of these 21* heads, as they flow great as-cast and should be good for my custom cammed stock bottom-end 400rwhp goal. Eventually I want to build a high power stroker and if these heads could then be ported to flow 310 cfm (or more) like the 23* heads, then I would only need to buy one set of heads, and just get them ported later.
01-13-2010, 11:57 PM
#103
Im not so sure that the port in this head could be ran in the rolled over castings at all. Brian thought even if possible the difference would be pretty negligable. As it is, with how the chamber comes out you are running a semi odd spark plug reach as they sit now
01-14-2010, 08:19 AM
#104
So it sounds like between the 2 heads, the 21* heads have the best as-cast potential and can still flow 300+ cfm fully ported so would be good for 350/355 builds or mild or high CR strokers, where as the 23* would offer the most potential fully ported for high RPM 355 or high hp strokers at over 220cc and 310+ cfm. Is this correct?
01-14-2010, 11:44 AM
#105
I dont know about the 21 degree going 300 cfm, as Ive just never seen any other LTx head get within 20 cfm of that number on the bench we use, other than hand done stuff that isnt for 99% of people (read expensive stuff that is very good but there is a price for that)
Id love to see that though.. cough cough AI
Id love to see that though.. cough cough AI
01-14-2010, 11:52 AM
#106
I dont know about the 21 degree going 300 cfm, as Ive just never seen any other LTx head get within 20 cfm of that number on the bench we use, other than hand done stuff that isnt for 99% of people (read expensive stuff that is very good but there is a price for that)
Id love to see that though.. cough cough AI
Id love to see that though.. cough cough AI
01-14-2010, 02:55 PM
#108
Plenty of aftermarket 23* heads break 300cfms, and some totally destroy it when hand ported.
01-14-2010, 06:41 PM
#109
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