NEW PARTS-Valves& Springs
- Thread starter MP3racer
- Start date
I'm really sorry guys
...... It was such a crazy day today that I bolted out and forgot the specs for everyone!!!!
OK, go ahead :mad: I deserve it!!!!!
I'll try to make sure I have them on Monday!
I'd try to go from memory but I want to make sure I have them totally correct (and you know how memory starts to go after a while
)
Anyway, thanks guys for understanding....
Tom
...... It was such a crazy day today that I bolted out and forgot the specs for everyone!!!!OK, go ahead :mad: I deserve it!!!!!
I'll try to make sure I have them on Monday!
I'd try to go from memory but I want to make sure I have them totally correct (and you know how memory starts to go after a while
)Anyway, thanks guys for understanding....
Tom
- :
- 92 & 16 Meyatas
i'm interested too
I would definetly be interested when I crack this motor open.
deckedoutmp5
Member
- :
- 02 MP5 #3256
im in
MP3racer said:Hey everyone,
All of us at Doc B Racing have been working hard on the motor and chasssis build of the Mazdaspeed Protege Gran-Am Cup race car. We have developed several new parts for the motor. One of the first we think we will have available for sale will be the upgraded valve train components. Anyone who has forced induction will benefit from better valve springs to keep the valve open in the face of the increased cylinder pressures. Also the upgraded stainless steel valves will withstand the higher cylinder temperatures seen in turbo charged engines.
I wanted to guage the interest of these parts. The valve springs are a special set we have developed with Eibach. (Yes the same eibach that makes the world renowned suspension springs). The valves are from another well known manufacturer, Manley. I should have pricing on the kit in the next few days.
We will have other components available once we have tested them to our satisfaction.
Take Care,
Tom
Doc B Racing
So basically thee valves and springs are aimed for preventative maintenence more or less? Other than having the ability to keep the valve open longer, what else would upgraded springs and valves bring to the table?
Would our redline be affected in any way? Would upgrading these valvetrain components allow us to rev higher without worry or spinning a rod bearing or something along these lines?
-B
7
70
Neat!
OK guys, as promised here are the specs on the new valve springs!
Installed height = 1.48"
Installed Press. = 52 lbs.
Open Height = 1.02"
Max Lift = .450"
Open Pressure = 145 lbs.
Coil Bind = .960"
Now the advertised installed pressure seems a bit low (since stock is 39-44), but this was done to allow use with the stock cam and NA. With a minimal shim on the seat (as we are doing)we have 70 lbs. installed pressure which should work great with the JDM intake cam, repinned exh cam (US intake cam), and better valves for the turbo.
For those who asked what the advantages are of upgraded valves and springs.
Regarding the valves, better alloys allow a lighter valve. This provides benefits in opening rate and RPM limits. Also, when using an undercut stem that is swirl polished it significantly improves air/fuel flow. Finally, improved alloys help prevent the problems associated with broken stems and valve heads (otherwise known as disaster).
Regarding the springs, of course the new design allows for higher lift cams, improved seat pressure (to keep in all that boost)and better control of the valve to prevent the valve from slamming into the seat on the way down (for longer life on the valve and seat). Also, they feature a special alloy that improves the life of the spring (Just imagine how much heat is generated in the coils of the spring going up and down thousands of time per minute for hours on end!)
We should be testing the whole set up soon. Waiting (as usual) for final parts to arrive. Once tested and we are happy with the performance we will have them available. Also, I should have pricing (at least on the springs)in the next few days.
Any further questions, please feel free to ask!
Thanks,
Tom
Doc B Racing
Installed height = 1.48"
Installed Press. = 52 lbs.
Open Height = 1.02"
Max Lift = .450"
Open Pressure = 145 lbs.
Coil Bind = .960"
Now the advertised installed pressure seems a bit low (since stock is 39-44), but this was done to allow use with the stock cam and NA. With a minimal shim on the seat (as we are doing)we have 70 lbs. installed pressure which should work great with the JDM intake cam, repinned exh cam (US intake cam), and better valves for the turbo.
For those who asked what the advantages are of upgraded valves and springs.
Regarding the valves, better alloys allow a lighter valve. This provides benefits in opening rate and RPM limits. Also, when using an undercut stem that is swirl polished it significantly improves air/fuel flow. Finally, improved alloys help prevent the problems associated with broken stems and valve heads (otherwise known as disaster).
Regarding the springs, of course the new design allows for higher lift cams, improved seat pressure (to keep in all that boost)and better control of the valve to prevent the valve from slamming into the seat on the way down (for longer life on the valve and seat). Also, they feature a special alloy that improves the life of the spring (Just imagine how much heat is generated in the coils of the spring going up and down thousands of time per minute for hours on end!)
We should be testing the whole set up soon. Waiting (as usual) for final parts to arrive. Once tested and we are happy with the performance we will have them available. Also, I should have pricing (at least on the springs)in the next few days.
Any further questions, please feel free to ask!
Thanks,
Tom
Doc B Racing
- :
- 09 370Z Nismo
You think you would one day be interested in selling awhole new head kit, minus the actual head? ie. Custom intake and exhaust cams, with valves and springs. Two different kits, one aimed at n.a, one aimed at turbo? A lot of people are not familiar with the tech of cams and valves and would really kinda just like a kit they can buy and have installed. I'd be one of em, and I'd pay
Equinox said:You think you would one day be interested in selling awhole new head kit, minus the actual head? ie. Custom intake and exhaust cams, with valves and springs. Two different kits, one aimed at n.a, one aimed at turbo? A lot of people are not familiar with the tech of cams and valves and would really kinda just like a kit they can buy and have installed. I'd be one of em, and I'd pay
same here..
kits would be a great idea..Just due to availablity of the JDM intake/exhaust cams and so on and so forth. Since I'm probably sticking to N/A, these springs in conjuction with the cams should provide a fair gain? What about with an aftermarket piston for higher compression? Or is it even worth getting the pistons.
Yes, down the road a bit I think a kit is possible.
Our main goal right now is to get the turbo race car built and competitive.
Fortunately for the "street" guys, the rules require us to keep the motor in line with what most of you are building for your street cars. Therefore, we can offer our parts to you. Currently, the rules require a "stock cam" which includes the JDM parts. We plan on requesting a revised cam early in the season (we have to take what we were given for now).
I talked with the guy who does our base machine work today and he is working up a price to install the new springs and valves into a customer's head including a valve job on the Serdi (very accurate machine used by most NASCAR teams....not that I revere them, just they have the $ for the best!) for those who are interested.
Again, thanks for the interest.
Tom
Doc B Racing
Our main goal right now is to get the turbo race car built and competitive.
Fortunately for the "street" guys, the rules require us to keep the motor in line with what most of you are building for your street cars. Therefore, we can offer our parts to you. Currently, the rules require a "stock cam" which includes the JDM parts. We plan on requesting a revised cam early in the season (we have to take what we were given for now).
I talked with the guy who does our base machine work today and he is working up a price to install the new springs and valves into a customer's head including a valve job on the Serdi (very accurate machine used by most NASCAR teams....not that I revere them, just they have the $ for the best!) for those who are interested.
Again, thanks for the interest.
Tom
Doc B Racing
I'm definetly down then..the lower the price the better. So how much would the set of springs cost? if you had to estimate?
