Get in Line! Trick Flow 2v heads coming! - Page 2

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  1. #16

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    Those sound like pretty great heads! Yes they beat out any 4vs in flow. The highest is 233cfm @ .500 lift (03/04), the 2nd highest is 231 @ .500 lift (96-98). I wonder how the exhaust side flows? Hopefully they come out with something for us 4v guys but I sort of doubt that :(

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  3. #17
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    here are the flow numbers

    Code:
    INTAKE
    
    	Twisted Wedge	PI	SVO		
    lift	CFM				vs. PI	vs SVO
    0.1	56.2		51	54	10.20%	4.07%
    0.2	122.5		102	106	20.10%	15.57%
    0.3	172.7		138	155	25.14%	11.42%
    0.4	212.6		153	177	38.95%	20.11%
    0.5	233.3		156	193	49.55%	20.88%
    0.55	241		159	203	51.57%	18.72%
    0.6	236.3		160	206	47.69%	14.71%
    0.65	241.7					
    						
    						
    EXHAUST
    					
    	Twisted Wedge	PI	SVO		
    lift	CFM					
    0.1	42.6		49	46	-13.06%	-7.39%
    0.2	95.9		84	90	14.17%	6.56%
    0.3	134.8		107	119	25.98%	13.28%
    0.4	164.4		123	134	33.66%	22.69%
    0.5	174.6		133	140	31.28%	24.71%
    0.55	177.4		136	141	30.44%	25.82%
    0.6	180.1		138	143	30.51%	25.94%
    0.65	182.3

  4. #18

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    I sent you an email awhile back. Can't wait for a set!

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  6. #19
    Senior Member Array Trevor04GT's Avatar
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    Yess!!!!! Nice!!!! Im so happy about this. I cant wait

  7. #20
    Senior Member Array vidmaster's Avatar
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    yea im definitely excited, time to crack open the piggy bank

  8. #21
    Senior Member Array Mod Motor Maniac's Avatar
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    Looks good, the low lift flow looks great on the intake.

    You're right Ken, you can only flow so much air through a little intake valve, especially with the small bore size. It looks like there is a lot of room for improvement on the exhaust side with some re-working, should be fun finding out.

    My guess is that the largest gains over ported PI heads will be from the combustion chamber efficiency, to get big numbers we have to weld up the chambers and re-machine them with stock units.

    Our intake manifold has just been approved for Pure Street.....with these heads maybe the time has come.

  9. #22
    Senior Member Array TGJ's Avatar
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    Quote Originally Posted by Modular Depot View Post
    here are the flow numbers

    Code:
     
    INTAKE
     
        Twisted Wedge    PI    SVO        
    lift    CFM                vs. PI    vs SVO
    0.1    56.2        51    54    10.20%    4.07%
    0.2    122.5        102    106    20.10%    15.57%
    0.3    172.7        138    155    25.14%    11.42%
    0.4    212.6        153    177    38.95%    20.11%
    0.5    233.3        156    193    49.55%    20.88%
    0.55    241        159    203    51.57%    18.72%
    0.6    236.3        160    206    47.69%    14.71%
    0.65    241.7                    
     
     
    EXHAUST
     
        Twisted Wedge    PI    SVO        
    lift    CFM                    
    0.1    42.6        49    46    -13.06%    -7.39%
    0.2    95.9        84    90    14.17%    6.56%
    0.3    134.8        107    119    25.98%    13.28%
    0.4    164.4        123    134    33.66%    22.69%
    0.5    174.6        133    140    31.28%    24.71%
    0.55    177.4        136    141    30.44%    25.82%
    0.6    180.1        138    143    30.51%    25.94%
    0.65    182.3

    Right out of the box, they look to be a very good N/A head.

  10. #23
    Member Array mogs01gt's Avatar
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    Quote Originally Posted by Modular Depot View Post
    here are the flow numbers

    Code:
    INTAKE
    
    	Twisted Wedge	PI	SVO		
    lift	CFM				vs. PI	vs SVO
    0.1	56.2		51	54	10.20%	4.07%
    0.2	122.5		102	106	20.10%	15.57%
    0.3	172.7		138	155	25.14%	11.42%
    0.4	212.6		153	177	38.95%	20.11%
    0.5	233.3		156	193	49.55%	20.88%
    0.55	241		159	203	51.57%	18.72%
    0.6	236.3		160	206	47.69%	14.71%
    0.65	241.7					
    						
    						
    EXHAUST
    					
    	Twisted Wedge	PI	SVO		
    lift	CFM					
    0.1	42.6		49	46	-13.06%	-7.39%
    0.2	95.9		84	90	14.17%	6.56%
    0.3	134.8		107	119	25.98%	13.28%
    0.4	164.4		123	134	33.66%	22.69%
    0.5	174.6		133	140	31.28%	24.71%
    0.55	177.4		136	141	30.44%	25.82%
    0.6	180.1		138	143	30.51%	25.94%
    0.65	182.3
    The exhaust side is on pair with ported 2v's. Is there any room for improvement?

  11. #24
    Senior Member Array Mod Motor Maniac's Avatar
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    Quote Originally Posted by mogs01gt View Post
    The exhaust side is on pair with ported 2v's. Is there any room for improvement?
    Actually, good ported 2V exhaust ports are over 200 cfm easily. My guess is that some blending of the valve job and maybe an improved valve back cut/valve seat relationship will significantly improve the trick flow heads. Castings, no matter how good, just don't have the precision in terms of transition in the valve area compared to CNC parts. This transition is especially important on the exhaust side.

  12. #25
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    I think i've got a woody..lol.

  13. #26
    Member Array mogs01gt's Avatar
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    Quote Originally Posted by Mod Motor Maniac View Post
    Actually, good ported 2V exhaust ports are over 200 cfm easily. My guess is that some blending of the valve job and maybe an improved valve back cut/valve seat relationship will significantly improve the trick flow heads. Castings, no matter how good, just don't have the precision in terms of transition in the valve area compared to CNC parts. This transition is especially important on the exhaust side.
    I wonder what type of valves TF will be using in these heads.

  14. #27

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    It's hard to improve on perfection!

    Quote Originally Posted by silverstang1996 View Post
    Those sound like pretty great heads! Yes they beat out any 4vs in flow. The highest is 233cfm @ .500 lift (03/04), the 2nd highest is 231 @ .500 lift (96-98). I wonder how the exhaust side flows? Hopefully they come out with something for us 4v guys but I sort of doubt that :(

  15. #28
    Senior Member Array guitar maestro's Avatar
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    Quote Originally Posted by bsmith782 View Post
    It's hard to improve on perfection!
    they do sound great, but I know those forced induction guys are going to hog out those exhaust ports

  16. #29

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    Any word on increase in the spark plug thread count in the heads? I know some people have had the blow out issues. I'd love to stay N/A for now and put heads and cams in mine to see how well it does. Dreams....

  17. #30
    Senior Member Array stonemonk9's Avatar
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    These seem to be very promising, I agree that the exhaust flow does seem a bit low but can prob be improved on. I could def benefit from the increased compression as well w/ small chambers.

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