F303, 1.7rr and AFR 165's

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Billy88LX

Founding Member

May 1, 2001

157

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17

Alberta, Canada

May 16, 2005

#1

• May 16, 2005

• #1

I'm thinking about getting a F303 and was wondering if the lift would be to much for the AFR165's .550" lift springs? I already have the 1.7 rr's which would put it at .544" lift. Is this cutting it close or will I be alright?

 

jbj454

New Member

May 10, 2005

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May 16, 2005

#2

• May 16, 2005

• #2

Not really sure, but I just installed an E cam, GT40X heads, and Cobra 1.7 rr. I had the heads milled to 58 cc and mine is working pretty good. Not really sure about an F. Somone else will probably chime in.

 

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Highbredcloud

Active Member

Mar 4, 2003

1,075

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36

Palos Hills, IL

May 16, 2005

#3

• May 16, 2005

• #3

you'd be fine with the 1.7...,however, if you could spend $150 more and get a custom cam...that would definatley take a better adventage of those AFR's...

 

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87GT 306

New Member

Oct 11, 2004

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Springfield MA

May 16, 2005

#4

• May 16, 2005

• #4

Yea, I had an F-cam and changed my mind and got a Xtreme energy cam that would take better advantage of the 165's . This cam is streetable and makes awesome torque. Im building the motor now. I have to check the clearances with some clay or something, hopefully the cam will work with the heads. The cam is 544 int, 555 ex. and my heads are 165 emissions legal 58cc, Anyone have any idea whether it will fit?

 

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87GT 306

New Member

Oct 11, 2004

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Springfield MA

May 16, 2005

#5

• May 16, 2005

• #5

bump

 

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Billy88LX

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May 1, 2001

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Alberta, Canada

May 18, 2005

#6

• May 18, 2005

• #6

ttt

 

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tjm73

Founding Member

Aug 3, 2000

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48

Rush, NY

May 18, 2005

#7

• May 18, 2005

• #7

Billy88LX said:

I'm thinking about getting a F303 and was wondering if the lift would be to much for the AFR165's .550" lift springs? I already have the 1.7 rr's which would put it at .544" lift. Is this cutting it close or will I be alright?

Click to expand...

Call 818-890-0616 and ask AFR if the springs will be ok with that cam. That number is off their webpage.

 

moonenn3186

Founding Member

Jan 9, 2002

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Dubuque, Iowa

May 18, 2005

#8

• May 18, 2005

• #8

Are you running stock pistons? If so - you will need to check p/v clearance with that kind of lift.

 

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tony91723

Member

Nov 30, 2004

71

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7

May 18, 2005

#9

• May 18, 2005

• #9

I have afr 185's (2.02 intake valve) on my 306. I have a cam pushing .512 lift with 1.7 RR's and the clearance was tight but was enough. You also have to realize 165's have the 1.90 intake valve. Other than that I suggest you just check your clearance it's a little time consuming but is just a safe route.

 

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Billy88LX

Founding Member

May 1, 2001

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Alberta, Canada

May 18, 2005

#10

• May 18, 2005

• #10

It' going in a dss 331 with 13cc dished pistons.

 

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90Notch

Founding Member

Jan 31, 2002

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Westwood, MA & yes it's killing me that I'm no

May 18, 2005

#11

• May 18, 2005

• #11

"The cam is 544 int, 555 ex. and my heads are 165 emissions legal 58cc, Anyone have any idea whether it will fit? "

It should fit with room to spare and it's NOT the max lift that causes the interference. Interference occurs near TDC when the vlv is just coming off seat on intake and going on seat on exhaust...peak lift occurs when piston is in the hole for both int & exh.

 

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87GT 306

New Member

Oct 11, 2004

260

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Springfield MA

May 19, 2005

#12

• May 19, 2005

• #12

90Notch said:

"The cam is 544 int, 555 ex. and my heads are 165 emissions legal 58cc, Anyone have any idea whether it will fit? "

It should fit with room to spare and it's NOT the max lift that causes the interference. Interference occurs near TDC when the vlv is just coming off seat on intake and going on seat on exhaust...peak lift occurs when piston is in the hole for both int & exh.

Click to expand...

Yea you were right we checked the clearance lasnite and it made it, but not by alot. Eventually Im going to upgrade the springs.