tsr pack A???

[Wayne]

actually we can use that site for the 8v 16v argument 


Std 16v inlet 117 cfm
Std 16v exh 91
ported inlet 142
ported exh 104
std 8v inlet 81
std 8v exh 60
ported inlet106
ported exh 77
ported big valve inlet 118
ported big valve exh 79

so the 16v inlet ports flow 44% better as standard, 34% better ported, and 20% better vs big valve 8v
and the 16v exhaust ports flow 51% better as standard, 35% better ported and 31% better vs big valve 8v

 

Large pinch of salt needed with those figures, 16v ports are a lot smaller so I cannot see even with work how it can be that much better.

[Len]

Maybe smaller but twice as many! We all know that quantity counts! 

[Paul86S2]

So Paul86S2 where is the best place to buy a flowed/big valve head from?

It all depends what you want Len. As far as I can ascertain you can only really go 0.5mm bigger on the valves without major work.

If you want a decent fast road head, ported and polished with 3 cut valves and seats, new valve guides and seals then I would suggest going on CGTI for the group buy (£350 plus vat), apparently its done by the same guy who does the TSR heads and a few other companies. He also works on a lot of race series and for Radical I believe.
The same guy will do a head to any further spec you want including bigger valves etc.

You do pay your money and take your chance with a lot of work like this. I saw a head recently that cost over £500 and all they had done was some basic port grinding.

Porting seems to be a bit of a weird science, more flow doesn't always equate to more power, you also need to maintain the speed of the mixture through the head.

Paul

[VeeDubGTI16v]

actually we can use that site for the 8v 16v argument 


Std 16v inlet 117 cfm
Std 16v exh 91
ported inlet 142
ported exh 104
std 8v inlet 81
std 8v exh 60
ported inlet106
ported exh 77
ported big valve inlet 118
ported big valve exh 79

so the 16v inlet ports flow 44% better as standard, 34% better ported, and 20% better vs big valve 8v
and the 16v exhaust ports flow 51% better as standard, 35% better ported and 31% better vs big valve 8v

 

Large pinch of salt needed with those figures, 16v ports are a lot smaller so I cannot see even with work how it can be that much better.

it cant be true then if you dont believe it 

numbers dont lie wayne, theres no opinion there, just maths

[VeeDubGTI16v]

So Paul86S2 where is the best place to buy a flowed/big valve head from?

It all depends what you want Len. As far as I can ascertain you can only really go 0.5mm bigger on the valves without major work.

If you want a decent fast road head, ported and polished with 3 cut valves and seats, new valve guides and seals then I would suggest going on CGTI for the group buy (£350 plus vat), apparently its done by the same guy who does the TSR heads and a few other companies. He also works on a lot of race series and for Radical I believe.
The same guy will do a head to any further spec you want including bigger valves etc.

You do pay your money and take your chance with a lot of work like this. I saw a head recently that cost over £500 and all they had done was some basic port grinding.

Porting seems to be a bit of a weird science, more flow doesn't always equate to more power, you also need to maintain the speed of the mixture through the head.

Paul

its a balance to the speed of the motor, so for higher revving engines its more important to get the air in quickly, so smaller ports are good.

[Wayne]

actually we can use that site for the 8v 16v argument 


Std 16v inlet 117 cfm
Std 16v exh 91
ported inlet 142
ported exh 104
std 8v inlet 81
std 8v exh 60
ported inlet106
ported exh 77
ported big valve inlet 118
ported big valve exh 79

so the 16v inlet ports flow 44% better as standard, 34% better ported, and 20% better vs big valve 8v
and the 16v exhaust ports flow 51% better as standard, 35% better ported and 31% better vs big valve 8v

 

Large pinch of salt needed with those figures, 16v ports are a lot smaller so I cannot see even with work how it can be that much better.

it cant be true then if you dont believe it 

numbers dont lie wayne, theres no opinion there, just maths

Sorry but I don't believe those figues, to me 1 large valve against 2 smaller valves does not add up to the big difference shown by those figures.

[VeeDubGTI16v]

do you have the valve sizes to add to the thread?

lets keep this factual, opinions are not welcome!

[Wayne]

do you have the valve sizes to add to the thread?

lets keep this factual, opinions are not welcome!

Nice attitude  I love this site at times.

[Len]

So Paul86S2 where is the best place to buy a flowed/big valve head from?

It all depends what you want Len. As far as I can ascertain you can only really go 0.5mm bigger on the valves without major work.

If you want a decent fast road head, ported and polished with 3 cut valves and seats, new valve guides and seals then I would suggest going on CGTI for the group buy (£350 plus vat), apparently its done by the same guy who does the TSR heads and a few other companies. He also works on a lot of race series and for Radical I believe.
The same guy will do a head to any further spec you want including bigger valves etc.

You do pay your money and take your chance with a lot of work like this. I saw a head recently that cost over £500 and all they had done was some basic port grinding.

Porting seems to be a bit of a weird science, more flow doesn't always equate to more power, you also need to maintain the speed of the mixture through the head.

Paul

I want the biggest valves possible and the greatest flow! Plus high lift/dwell cams. Will be fed by either throttle bodies or carbs and a good tube exhaust manifold.
Money isnt my first consideration at this point, I want to find out the very best and then decide if I want to pay out!

[VeeDubGTI16v]

do you have the valve sizes to add to the thread?

lets keep this factual, opinions are not welcome!

Nice attitude  I love this site at times.

put some numbers on the table then to prove your opinion! what a kop out