 LS2 TFS heads Rocker Arm question |
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 Aug 12 2012, 10:14 PM
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#1
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Member  Group: Advanced Members Posts: 182 Joined: 27-August 08 Member No.: 2,284  |
Is the stock rocker with trunion upgrade adequate, or is their a real concern necessitating I run a full roller?
My engine guy says anything over .600 lift and 6000rpm needs full roller (he is a Ford guy). He also is concerned about spring pressures. Additionally he suggests that once preload is set with pushrod length if the valves need to be adjusted in a different spot it would be nearly impossible with the limited travel lifters. He says with aluminum block/heads preload changes a lot when it gets hot. I have too much money in the setup as is, and really don't want to have to buy yet another set of rockers. The motor will be used for HPDE, autox, and some daily driving. Anyone know the limits on these stock rockers with the upgrade? Any help appreciated! |
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Aug 13 2012, 01:38 AM
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#2
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Advanced Member Group: Advanced Members Posts: 321 Joined: 15-November 04 From: Canada Member No.: 542 |
The issue with the Trick Flows is they use a soft guide, bronze. The side load wears the guides rapidly. The factory heads use a harder guide. I had TFS 245s and used Jesel Mohawks. My current head is a Mast and I am now using LS7s with the trunion upgrade. They have not had the same issues as TFS.
The Trick Flows are a great head for the money. The exhaust ports flow really strong, more than my Mast's. |
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Aug 13 2012, 02:31 AM
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#3
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Member Group: Advanced Members Posts: 182 Joined: 27-August 08 Member No.: 2,284 |
QUOTE (Rampant @ Aug 12 2012, 09:38 PM)  The issue with the Trick Flows is they use a soft guide, bronze. The side load wears the guides rapidly. The factory heads use a harder guide. I had TFS 245s and used Jesel Mohawks. My current head is a Mast and I am now using LS7s with the trunion upgrade. They have not had the same issues as TFS. The Trick Flows are a great head for the money. The exhaust ports flow really strong, more than my Mast's. Yeah, I am running PM guides to address the wear issue. This is Advanced Inductions TFS heads (not the standard TFS). I really didn't want to have to spend another grand on rockers, although I realize Jesel or T&D would be the ultimate option. My understanding was that the stockers with trunion upgrade were really a nice option for the money. I have run stockers on both motors before, both with lift over 0.600, and rpms over 6500, with no issues. Im about to pull my hair out, seems like everytime I turn around on this motor there is a big decision to make, and usually its tied to spending more $$ |
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Posts in this topic
pharmd LS2 TFS heads Rocker Arm question Aug 12 2012, 10:14 PM
GlennCMC70 I ran 6800 on OEM stock rockers. I don't see t... Aug 13 2012, 03:16 AM
pharmd QUOTE (GlennCMC70 @ Aug 12 2012, 11:16 PM... Aug 13 2012, 03:35 AM GlennCMC70 .600" lift w/ 232/240 dur on a 112 LSA. XER l... Aug 13 2012, 04:30 PM dailydriver I've actually heard some engine builders state... Aug 13 2012, 06:12 PM pharmd QUOTE (dailydriver @ Aug 13 2012, 02:12 P... Aug 13 2012, 06:30 PM 1qwikbird QUOTE (pharmd @ Aug 13 2012, 02:30 PM) QU... Aug 14 2012, 02:48 AM GlennCMC70 QUOTE (pharmd @ Aug 13 2012, 01:30 PM) QU... Aug 14 2012, 02:52 AM pharmd QUOTE (GlennCMC70 @ Aug 13 2012, 10:52 PM... Aug 14 2012, 03:29 AM Rampant I am running upgraded LS7s on mine and it has .671... Aug 14 2012, 06:43 PM |
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