Get in Line! Trick Flow 2v heads coming!

[Modular Depot]

here are the flow numbers

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

[Mport_KLR]

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

[Trevor04GT]

Yess!!!!! Nice!!!! Im so happy about this. I cant wait

[vidmaster]

yea im definitely excited, time to crack open the piggy bank :)

[Mod Motor Maniac]

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.

[TGJ]

Originally Posted by Modular Depot

here are the flow numbers

 
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.

[mogs01gt]

Originally Posted by Modular Depot

here are the flow numbers

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?

[Mod Motor Maniac]

Originally Posted by mogs01gt

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.