AFR 165 heads, but what valve springs?

91notchbk · Dec 13, 2006

I am looking at buying a set of AFR 165cc heads, but I have been informed that the springs they come with are weak with a hydraulic roller cam. I called AFR and they have an upgrade but the spring seat needs to be machined to accept the upgrade. They also informed me that comp may have a spring package that will work. I then called comp and they threw out a part number (956-16) , but did not know if they would work. I am wondering what springs will work with these heads and a hydraulic roller cam.

32785stang · Dec 13, 2006

call afr and find out what size the spring pocket is....then find out what size the od of the comp springs are...that will tell u if they will fit without grinding the spring pocket

Dark Knight · Dec 13, 2006

What cam?

91notchbk · Dec 13, 2006

Dark Knight said:
What cam?

Comp cam XE270HR with 114degree lobe separation. 218/224 duration at .050. Lift is 512/512. When I talked to AFR they said the stock springs are speced. for a non-roller cam and I need to upgrade, to run this cam.

Markus · Dec 13, 2006

Hello,

call Ed Curtis (FTI), he sell a "drop in" spring kit for the
AFR´s. No machining needed. I use them too in my AFR185.

Markus

Rick 91GT · Dec 13, 2006

Markus said:
Hello,

call Ed Curtis (FTI), he sell a "drop in" spring kit for the
AFR´s. No machining needed. I use them too in my AFR185.

Markus

Yep, give Ed a shout I use his drop in upgrades all the time with no issues at all...

www.flowtechinduction.com he'll have the Viton Seals and springs on the shefl ready to go..

91notchbk · Dec 18, 2006

Ed Curtis must be a busy guy. He does not have a number listed on his website and communicates via e-mail. I have not heard back from him and it has been four days. I did call AFR and they finally gave me a spring reccomendation. They said use comp spring package 977-16. However these seem pretty aggressive. They have a OD of 1.460, and closed pressure of 155lbs. They are also reccommended for a soild roller cam. I am not really sure what will work good with these. The stock AFR springs have an installed height of 1.850, OD 1.450, and closed pressure of 120lbs. I am curious what springs people are using with these heads and a hydraulic roller cam?

Markus · Dec 18, 2006

Hello,

yes, i think also that Ed is a busy man. He is "THE" man in facto custom cam and valve train.
The PS3 spring kit is the right one for your application. Max lift .600, 135 pound closed pressure @ 1.830 - 1.845, OD 1.450.
I use this spring kit with a roller custom cam from Ed with .570 and .560 lift and 224 and 228 duration (intake/exhaust).
The kit comes with shims and viton valve stem seals.

http://212.227.100.192/mustang/stroker/prep4/big001.jpg

Markus

EDC · Dec 18, 2006

91notchbk said:
Ed Curtis must be a busy guy. He does not have a number listed on his website and communicates via e-mail. I have not heard back from him and it has been four days. I did call AFR and they finally gave me a spring reccomendation. They said use comp spring package 977-16. However these seem pretty aggressive. They have a OD of 1.460, and closed pressure of 155lbs. They are also reccommended for a soild roller cam. I am not really sure what will work good with these. The stock AFR springs have an installed height of 1.850, OD 1.450, and closed pressure of 120lbs. I am curious what springs people are using with these heads and a hydraulic roller cam?

As with most serious performance shops... We were attending the PRI show in Florida to see what the industry has to offer for 2007. That's why there were no responses to emails for the past week.

In terms of valve spring choices....

We have five different spring "kits" available. Best to send the email again if I haven't responded yet. It's the only way to get me. I don't even bother with the phone here since it's extremely busy and it's nothing but a distraction. You'd hate to have your order held up a few days cuz' I'm BSing on the phone all day!

Ed

91notchbk · Dec 18, 2006

Hi Ed,
I recieved your e-mail today with all your spring options. I will be looking to purchase the PS3 kit. Can you e-mail me a total with shipping to Michigan 49201.Thanks.

AFR 165 heads, but what valve springs?

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