port and polished head
Evolving Member
Joined: Nov 2007
Posts: 177
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From: Hellas
Have a look here too : headwayperformance
Make sure you do your research on who is doing the work to your head.
I've had a head that was cut uneven on the deck horizontally and way too much material taken off to the point where the valves were missing material on the edges. It was giving back to me that way. This is from a shop that has been in the business for a decade too...
This time around I went with an unmolested head...no porting done...less chance of human error lol
I've had a head that was cut uneven on the deck horizontally and way too much material taken off to the point where the valves were missing material on the edges. It was giving back to me that way. This is from a shop that has been in the business for a decade too...
This time around I went with an unmolested head...no porting done...less chance of human error lol
Last edited by binh; Jan 8, 2011 at 07:47 AM.
Exactly. You can go very fast on a stock head, but how much faster could you have gone with a ported head, that's the magic question and ithe answer relies heavily on your other modiications.
it is correct that we used to do the heads for AMS. I think that stopped in 07' sometime. They have a cnc shop closer to them that does there work now.
There is a lot to think about when buying a head, first is going someplace you trust, and most other people trust. We are lucky enough to be trusted with some of the fastest, smartest people on this planet! We may not be the cheapest, but you pay for what you get. We are going to offer a budget head in the next few weeks as we are nailing it on the flow bench now. Something easy on the wallet, magic to the eyes, and kicks your *** when you press the loud pedal.
As far as valve sizing, I can tell you we have successfully made over 1000whp in various applications, and actually made 1600 flywheel horsepower with stock size valve on a VQ35. In the mitsu game, we just feel it is really unnecessary to use a oversize valve unless your making big power. The head we just did for John Shepard utilizes a oversize valve (1mm) and it makes in the neighborhood of 1400whp. Can't imagine or see how or why you would need the same size valve for something making even half of that. (700whp) Valve jobs are everything, and you can get close to the same airflow with the stock size valve. Torque is the benefit of this combination. As well as a broader area under the curve.
Now that is just our opinion, from our experience..it's not that you make the power, it's how you make it...
There is a lot to think about when buying a head, first is going someplace you trust, and most other people trust. We are lucky enough to be trusted with some of the fastest, smartest people on this planet! We may not be the cheapest, but you pay for what you get. We are going to offer a budget head in the next few weeks as we are nailing it on the flow bench now. Something easy on the wallet, magic to the eyes, and kicks your *** when you press the loud pedal.
As far as valve sizing, I can tell you we have successfully made over 1000whp in various applications, and actually made 1600 flywheel horsepower with stock size valve on a VQ35. In the mitsu game, we just feel it is really unnecessary to use a oversize valve unless your making big power. The head we just did for John Shepard utilizes a oversize valve (1mm) and it makes in the neighborhood of 1400whp. Can't imagine or see how or why you would need the same size valve for something making even half of that. (700whp) Valve jobs are everything, and you can get close to the same airflow with the stock size valve. Torque is the benefit of this combination. As well as a broader area under the curve.
Now that is just our opinion, from our experience..it's not that you make the power, it's how you make it...
it is correct that we used to do the heads for AMS. I think that stopped in 07' sometime. They have a cnc shop closer to them that does there work now.
There is a lot to think about when buying a head, first is going someplace you trust, and most other people trust. We are lucky enough to be trusted with some of the fastest, smartest people on this planet! We may not be the cheapest, but you pay for what you get. We are going to offer a budget head in the next few weeks as we are nailing it on the flow bench now. Something easy on the wallet, magic to the eyes, and kicks your *** when you press the loud pedal.
As far as valve sizing, I can tell you we have successfully made over 1000whp in various applications, and actually made 1600 flywheel horsepower with stock size valve on a VQ35. In the mitsu game, we just feel it is really unnecessary to use a oversize valve unless your making big power. The head we just did for John Shepard utilizes a oversize valve (1mm) and it makes in the neighborhood of 1400whp. Can't imagine or see how or why you would need the same size valve for something making even half of that. (700whp) Valve jobs are everything, and you can get close to the same airflow with the stock size valve. Torque is the benefit of this combination. As well as a broader area under the curve.
Now that is just our opinion, from our experience..it's not that you make the power, it's how you make it...
There is a lot to think about when buying a head, first is going someplace you trust, and most other people trust. We are lucky enough to be trusted with some of the fastest, smartest people on this planet! We may not be the cheapest, but you pay for what you get. We are going to offer a budget head in the next few weeks as we are nailing it on the flow bench now. Something easy on the wallet, magic to the eyes, and kicks your *** when you press the loud pedal.
As far as valve sizing, I can tell you we have successfully made over 1000whp in various applications, and actually made 1600 flywheel horsepower with stock size valve on a VQ35. In the mitsu game, we just feel it is really unnecessary to use a oversize valve unless your making big power. The head we just did for John Shepard utilizes a oversize valve (1mm) and it makes in the neighborhood of 1400whp. Can't imagine or see how or why you would need the same size valve for something making even half of that. (700whp) Valve jobs are everything, and you can get close to the same airflow with the stock size valve. Torque is the benefit of this combination. As well as a broader area under the curve.
Now that is just our opinion, from our experience..it's not that you make the power, it's how you make it...
Thread Starter
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Joined: Jul 2005
Posts: 19
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From: Sherman,Tx
I have been looking into sending my head in ($1100 the cheapest from english racing and 1300 max) and with supplied parts (gsc spring and tit retainer kit, supertech valves and inconel exhaust .50 mm over, valve guides, ) is still guna run me about 2k to 2.1k. Buschur has their own alredy built with their own brand parts for 1800, but with new valves seats would run 2800. Turning in a core of coures. Which would you go with. And would you seriously need new valves seats I would say yes because you don't know how the person drove the head/core that buscur might be porting and polishing. Any thoughts guys.
I have been looking into sending my head in ($1100 the cheapest from english racing and 1300 max) and with supplied parts (gsc spring and tit retainer kit, supertech valves and inconel exhaust .50 mm over, valve guides, ) is still guna run me about 2k to 2.1k. Buschur has their own alredy built with their own brand parts for 1800, but with new valves seats would run 2800. Turning in a core of coures. Which would you go with. And would you seriously need new valves seats I would say yes because you don't know how the person drove the head/core that buscur might be porting and polishing. Any thoughts guys.
this might be a dumb question but if your enlarging the valves arent you already getting new valve seats?
the valve seats have to be enlarged in order to fit the larger valves?
the valve seats have to be enlarged in order to fit the larger valves?
when people say 'new' it confuses me because new would mean, cutting out the old and putting in new. But, no matter what, if the head is getting ported, and especially guides being installed..the seats are getting machined and will be a 'new' and improved(hopefully) surface or seat. And it really doesn't matter how the person drove before you. The seats are made to withstand a beating much more then almost anyone could put out.