Will a Futral F13 cam clear AFR 205 heads milled to 61cc?
08-03-2005, 07:38 PM
#1
Will a Futral F13 cam clear AFR 205 heads milled to 60cc? I'm currently running a Futral F4 cam with my AFR 205 heads that are decked .035 to 60cc. I've searched the forum to learn about larger cams and am seriously considering the F13 on a 114 +4. However, I'm concerned about P-to-V clearance. I've read a few threads that talked around this topic, but no clear answer from Futral or AFR on this combination. I emailed both Futral and AFR and hope to get a response soon. Is anyone running this combo that can answer this question? Thanks! 
Last edited by AlohaC5; 08-04-2005 at 07:04 AM.
08-03-2005, 08:38 PM
#3
Hmmm... well first off milling them .035-.036 will get you approximately 60cc chambers. .030 mill will get you approximately 61cc. .024 mill is 62cc. Did you CC the chambers after getting them milled??? Are these angle milled???
I know if you go with 62cc chambers (.024 mill) and you use the factory gaskets (.054ish) you will have .086 on the intake side with the F13 (112lsa+4). I ran this combo but with Cometic .045 head gaskets and knocked down 440/420 SAE. It was an awesome street/road combo!!!
Here is a quote from Alan Futral;
Good luck....
I know if you go with 62cc chambers (.024 mill) and you use the factory gaskets (.054ish) you will have .086 on the intake side with the F13 (112lsa+4). I ran this combo but with Cometic .045 head gaskets and knocked down 440/420 SAE. It was an awesome street/road combo!!!
Here is a quote from Alan Futral;
Just to inform everybody, some average P\V clearances .
AFR heads milled .024" to 62CC with F14 -112+4 .075"\.152" with checker springs, solid lifters and .054" GM MLS gaskets on STOCK pistons. Same heads with F13-112+4 .086"\.167". If you miss a shift and float the valves your exhaust is what’s at risk, not the intake.
AFR heads milled .024" to 62CC with F14 -112+4 .075"\.152" with checker springs, solid lifters and .054" GM MLS gaskets on STOCK pistons. Same heads with F13-112+4 .086"\.167". If you miss a shift and float the valves your exhaust is what’s at risk, not the intake.
Last edited by SideStep; 08-03-2005 at 09:05 PM.
08-04-2005, 05:48 AM
#4
You're right - Thanks. The heads were milled .035, which would give me 60cc chambers (not 61cc). I am using the factory size Cometic gaskets (approx. .050). I plan to go with the 114 +4, not 112 +4. I don't believe Texas Speed "angle milled" the heads when they were decked. I hope this info clarifies my situation to see if this combo will work re: PV clearance.
Originally Posted by SideStep
Hmmm... well first off milling them .035-.036 will get you approximately 60cc chambers. .030 mill will get you approximately 61cc. .024 mill is 62cc. Did you CC the chambers after getting them milled??? Are these angle milled???
I know if you go with 62cc chambers (.024 mill) and you use the factory gaskets (.054ish) you will have .086 on the intake side with the F13 (112lsa+4). I ran this combo but with Cometic .045 head gaskets and knocked down 440/420 SAE. It was an awesome street/road combo!!!
Here is a quote from Alan Futral;
Good luck....
I know if you go with 62cc chambers (.024 mill) and you use the factory gaskets (.054ish) you will have .086 on the intake side with the F13 (112lsa+4). I ran this combo but with Cometic .045 head gaskets and knocked down 440/420 SAE. It was an awesome street/road combo!!!
Here is a quote from Alan Futral;
Good luck....
Last edited by AlohaC5; 08-04-2005 at 06:29 AM.
08-04-2005, 10:59 AM
#7
TECH Senior Member
I believe you'll have to flycut with 60cc and FM13. and i wouldn't have less than .100 clearance for a street motor. Otherwise, 1 missed shift and it is toast.
I remember asking Tony in the past about a similar condition and he didn't recommend more than 228 duration with a 60cc and no flycut.
I remember asking Tony in the past about a similar condition and he didn't recommend more than 228 duration with a 60cc and no flycut.
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08-04-2005, 04:39 PM
#9
I decided to go with the F13 cam on a 114 LSA with a +2 Advance based on my conversation today with Tony at AFR. Chris at East Coast Supercharging (ECS) will check the PV clearance with my 60cc AFR 205 heads. I think some degree of notching will be done on the pistons for a margin of safety since I frequently participate in road racing events (sponsored by NASA) and will see high RPMs, etc.
Does anyone have experience with the F13 on a 114 with +0 or +2 Advance? How much torque do I lose before 4500 RPMs vs. horsepower gain at the top end? This is a daily driver that I like to track often (Summit Point, Virginia International Raceway, and soon Beaverun and Watkins Glen). I would like to retain my current TQ (perhaps a little better) and increase my HP to 450. I like the numbers that Damian achieved!
Does anyone have experience with the F13 on a 114 with +0 or +2 Advance? How much torque do I lose before 4500 RPMs vs. horsepower gain at the top end? This is a daily driver that I like to track often (Summit Point, Virginia International Raceway, and soon Beaverun and Watkins Glen). I would like to retain my current TQ (perhaps a little better) and increase my HP to 450. I like the numbers that Damian achieved!
08-04-2005, 06:49 PM
#12
Originally Posted by AlohaC5
True - good point. What is the advantage of +0 vs. +2 for advance on this cam? What factors should I consider to decide one over the other? Thanks for the feedback!
08-04-2005, 08:18 PM
#14
I plan to have ECS install/tune the F13 114+2 in late November. I can provide you the dyno numbers/graph as soon as I have it. The F4 will be up for sale at that time too.
Originally Posted by Mirek
Aloha, do you have a dyno on that set-up ? I am thinking about swapping to that cam.
* Edit* Is your cam on a 112 or 114 ?
* Edit* Is your cam on a 112 or 114 ?
