How to choose Valve Springs for my Solid Head. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Master Chief · 11-30-2009, 12:56 PM

Hi guys.

I am building my SR20DET head, with Tomei solid lifters and 270 deg cams, and i am not sure how to choose the springs to fit.

I am planing to go with SuperTech double valve springs, as i heard good things about them, and they are well priced, over the TOMEI Type B anyway.

I dont plan to go over 8500RPM probably.

I dont want to loose anymore rockers, so i am concerned with the spring stiffness, and iam not sure how to choose , as supertech have a few options.

I am sure that TOMEI have taken breaking rockers under consideration desining there springs, so i'd like to compare the Supertech with them.

SuperTech state seat pressure at 40.5mm - as 116lbs or 106lbs or 95lbs.
Not sure what that means, and how to compare this to the TOMEI springs.

On the Supertech site, under inventory you can find there springs data:
http://www.supertechperformance.com/

Here you can see the only data i found on the Tomei springs:
http://www.tomei-p.co.jp/_2003web-ca...lvespring.html

Can anyone help or recomand on the subject ?

Also if you are using any of these, can you comment on reliability issues with the head setup.

Thanks,
Dany.

11-30-2009, 12:56 PM	#1
Master Chief Zilvia Junkie Join Date: Feb 2006 Location: Israel Posts: 332 Trader Rating: (3) Feedback Score: 3 reviews	How to choose Valve Springs for my Solid Head. Hi guys. I am building my SR20DET head, with Tomei solid lifters and 270 deg cams, and i am not sure how to choose the springs to fit. I am planing to go with SuperTech double valve springs, as i heard good things about them, and they are well priced, over the TOMEI Type B anyway. I dont plan to go over 8500RPM probably. I dont want to loose anymore rockers, so i am concerned with the spring stiffness, and iam not sure how to choose , as supertech have a few options. I am sure that TOMEI have taken breaking rockers under consideration desining there springs, so i'd like to compare the Supertech with them. SuperTech state seat pressure at 40.5mm - as 116lbs or 106lbs or 95lbs. Not sure what that means, and how to compare this to the TOMEI springs. On the Supertech site, under inventory you can find there springs data: http://www.supertechperformance.com/ Here you can see the only data i found on the Tomei springs: http://www.tomei-p.co.jp/_2003web-ca...lvespring.html Can anyone help or recomand on the subject ? Also if you are using any of these, can you comment on reliability issues with the head setup. Thanks, Dany.