7.450" PR installed with F13
Thread Starter
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
7.450" PR installed with F13 Well I just installed them and damn did the valve train noise get a lot quieter. I am running around 0.080" inch preload, maybe slightly less as it was hard to adjust out the adjustable one. Either way that is the highest preload I will see.
I spoke with Allan Futral and he said 1-1.5 turns past zero lash, IIRC. I ended up going 1.25 turns so I am right where he said as well (I actually spoke with Tony Mamo about this but just wanted to show that it is also in range with Futrals recommendations). The 7.400 that shipped with it made the valve train very noisy, to the point that I could hear it around 1500 rpm, low throttle (so the exhaust is quiet haha). I have AFR heads and MLS gaskets. The heads are untouched as well at 66cc.
I just wanted to post this up and maybe help some people out. Reguardless what is recommended for your setup, always double check and order the correct pushrods. There are a lot of guys running the F13 and with various setups as well. The "sewing machine" noise is not normal by any means, which most think is on this board. Get the proper push rods and you wont have to listen to that racket.
I spoke with Allan Futral and he said 1-1.5 turns past zero lash, IIRC. I ended up going 1.25 turns so I am right where he said as well (I actually spoke with Tony Mamo about this but just wanted to show that it is also in range with Futrals recommendations). The 7.400 that shipped with it made the valve train very noisy, to the point that I could hear it around 1500 rpm, low throttle (so the exhaust is quiet haha). I have AFR heads and MLS gaskets. The heads are untouched as well at 66cc.
I just wanted to post this up and maybe help some people out. Reguardless what is recommended for your setup, always double check and order the correct pushrods. There are a lot of guys running the F13 and with various setups as well. The "sewing machine" noise is not normal by any means, which most think is on this board. Get the proper push rods and you wont have to listen to that racket.
Good post Mike. Glad your motor is sounding more normal now.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
