Roller Rockers that fit under stock L99 Valve Covers? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ss camaro-monte · 10-31-2022, 09:10 PM

Just like the title says. What are my options if any? I have heard of Yella Terra, Comp seems to have the steel Pro magnums and then there is also the scorpions?

Any other option and do any of these fit under stock valve covers? I know a lot of guys use the CHE trunnion upgrade but from what I have seen forum members post 20k-30k looks like about time to replace these.

I rather do it right the first time and take the hit up front if I not have to change out the trunnions every 20k or so.

Ashen 6.2 · 11-01-2022, 05:30 AM

Um, if you are wanting to cam your car and are worried about changing things out at 20-30K.. might want to read up on valve springs and their life span. Depending on the cam you will most likely be in that same range depending on how you drive it.

larry_g · 11-01-2022, 08:28 AM

I can tell you for sure that Yella Terra do not fit under the stock valve covers. However they do work with Holley tall valve covers which bring along their own set of requirements such as taking a deep dive into any PCV or catch can system you have in place.

Sent from my Pixel 5 using Tapatalk

ss camaro-monte · 11-01-2022, 04:25 PM

I know about all the valve spring requirements. Just didn't want to have to mess with the rockers every 20k and from what some of the forum members have posted I would rather do something different with the rockers if available but if there isn't a solution with stock valve covers then the CHE will be my go to.

ss camaro-monte · 11-01-2022, 06:06 PM

Just talked to GPI, might be getting the Manton trunnion kit. Will find out more tomorrow.

Ashen 6.2 · 11-02-2022, 03:03 PM

Quote:

Originally Posted by ss camaro-monte

Just talked to GPI, might be getting the Manton trunnion kit. Will find out more tomorrow.

The looks like a good kit too!

WHAMMO · 11-03-2022, 04:08 PM

You can buy a valve cover spacers, but I had to cut the baffle to clear T&D rockers and I run pretty much the hjighest lift ever in a street car lol. I suggest you use gasket maker to seal the spacer to cover cause they will leak. I have the stock 1LE oil separator and a catch can; the catchcan does not even get close to full after 5000 miles. I used truck(longer) wires and its fine fro the wire length.Spacer is a good and cheap way to do it.

I would stay stock cause a heavier rockers (which most are aftermarket) wont be a good match for some springs or and rockers or springs might break. Shaft mount system with stock rockers look promising. Dont remember which company make it. GL

ss camaro-monte · 11-04-2022, 04:41 PM

Went with the Manton's Trunnion Kit

1JEWLDSSRS · 11-05-2022, 10:48 AM

As mentioned above, if you are going to cam your engine, don't go with a big cam if you don't want to have to "refresh" your springs and trunnions!! With the high lift cams they are a wear part and to keep them working correctly, you need to refresh them around 20k or so. I run the BTR .660 springs and did them at 23k, also I was running the Smith Brothers bronze trunnions and refreshed them at 26k, I had the most miles on them. Replaced them with the CHE's. The wear we are all seeing is comparable to one another. Just sayin. Insurance...

ss camaro-monte · 11-05-2022, 01:07 PM

Yep, I know all about the springs and trunnions. I just wanted to get the best parts possible. GPI said the Manton is a step above the CHE with slightly more surface contact and oil. I will also have the .660 BTR springs but I will have steel retainers. My ramp rates are milder compared to the standard GPI cams and my lift is only slightly less but was told the springs and trunnions would have to be checked at 20k but likely will go several thousand longer due to the milder set up. Either way it will all work out.

10-31-2022, 09:10 PM	#1
ss camaro-monte Drives: 2015 camaro 2ss, 87 monte ss Join Date: Jun 2016 Location: Houston Posts: 241	Roller Rockers that fit under stock L99 Valve Covers? Just like the title says. What are my options if any? I have heard of Yella Terra, Comp seems to have the steel Pro magnums and then there is also the scorpions? Any other option and do any of these fit under stock valve covers? I know a lot of guys use the CHE trunnion upgrade but from what I have seen forum members post 20k-30k looks like about time to replace these. I rather do it right the first time and take the hit up front if I not have to change out the trunnions every 20k or so.

11-01-2022, 05:30 AM	#2
Ashen 6.2 Drives: 2014 Camaro Z/SS Join Date: May 2014 Location: NW Arkansas Posts: 1,991 View My Garage	Um, if you are wanting to cam your car and are worried about changing things out at 20-30K.. might want to read up on valve springs and their life span. Depending on the cam you will most likely be in that same range depending on how you drive it. __________________ 2014 Camaro SS L99, Ashen Grey w/Black Leather - Build thread - http://www.camaro5.com/forums/showthread.php?t=491561 Mods - GPI 416 w/Custom Grind Cam, Ported Heads & Tuned by Ben, Mag Heartbeat, ZL1 Fuel Pump & DSX Aux Pump, NW 103 TB, FIC 1650's, Alky Meth, Circle D 3600 Triple Disc, RPM 5” CAI, Kooks Headers, Solo Cat Back, Viking Coil Overs & all the BMR Goodies in the rear, Zl1 3.23 Diff, DSS Axles, Gulfcoast Driveshaft, Hendrix Offset Diff Bushings, AFE Solid Subframe Bushings, 875HP/843TQ 5FDP

11-01-2022, 08:28 AM	#3
larry_g Drives: 2014 1SS/1LE Join Date: Nov 2015 Location: Louisville, KY Posts: 826	I can tell you for sure that Yella Terra do not fit under the stock valve covers. However they do work with Holley tall valve covers which bring along their own set of requirements such as taking a deep dive into any PCV or catch can system you have in place. Sent from my Pixel 5 using Tapatalk __________________ 830 WHP 700 WTQ, Whipple 2.9 @ 13lbs Boost, Flex Fuel Tune by Blevins Tuning, LSA SBE, 3.5 GripTec, ATI LS3 Damper, AFR 260cc Mongoose, ARP Studs, Yella Terra Ultralites, Johnson 2110R, BTR PDS Stage 3, Melling 10355, Improved Racing Baffle, ID1050X, DSX Triple Fuel Pump, RotoFab CAI, NW 103mm TB, Stainless Works 1-7/8" LTH to 3" Speed Eng w/ X-pipe to NPP, Powermaster 9509 XS, Detroit Speed Motor Mounts, MGW, Monster LT1-S, ZL1 Calipers, DBA Rotors & Pads, Bilstein B6 Struts & Shocks, BMR 1.25" Drop Springs & Adj Rear Bar, Pegasus Solid Bushings, Z/28 Wheels, other misc parts.

11-03-2022, 04:08 PM	#7
WHAMMO Drives: 13' 1LE Join Date: Apr 2012 Location: Canada Posts: 2,641	You can buy a valve cover spacers, but I had to cut the baffle to clear T&D rockers and I run pretty much the hjighest lift ever in a street car lol. I suggest you use gasket maker to seal the spacer to cover cause they will leak. I have the stock 1LE oil separator and a catch can; the catchcan does not even get close to full after 5000 miles. I used truck(longer) wires and its fine fro the wire length.Spacer is a good and cheap way to do it. I would stay stock cause a heavier rockers (which most are aftermarket) wont be a good match for some springs or and rockers or springs might break. Shaft mount system with stock rockers look promising. Dont remember which company make it. GL __________________ 13' 1LE Old setup: TSP 231-236/Tick 660/.105 PR, UDP, SW LT 2'' & HFC, stock NPP & H pipe, VR-DRX CAI, air scoop, Goertz1 manifold, 102mm BBK, 26" Toyo DRs, Forgestars R17x10 & F18x8, rear seat delete, remote Pat G tune Autocal, 7400 limiter, Spec Mini Twin. 91oct. 11.90@122.3, 0-60ft 2.0 / 11.99@123.6, 0-60ft 2.1 DA+819 ...519RWHP SAE Solid roller SBE LS3, FED, LLSR, 91oct, 605rwhp N/A. Tuned by Pat G. Build by me. Last edited by WHAMMO; 11-03-2022 at 04:23 PM.

11-05-2022, 10:48 AM	#9
1JEWLDSSRS Drives: 2011 SS-RS Join Date: May 2011 Location: FLORIDA Posts: 11,402	As mentioned above, if you are going to cam your engine, don't go with a big cam if you don't want to have to "refresh" your springs and trunnions!! With the high lift cams they are a wear part and to keep them working correctly, you need to refresh them around 20k or so. I run the BTR .660 springs and did them at 23k, also I was running the Smith Brothers bronze trunnions and refreshed them at 26k, I had the most miles on them. Replaced them with the CHE's. The wear we are all seeing is comparable to one another. Just sayin. Insurance... __________________ TSP STAGE 3 CAM,231/246 @112 LSA 614/641 LIFT, CIRCLE D 5C-4200-4500 CONVERTER,LOD INTAKE.CORSA EXHAUST. DSS 1 PC DS. PEGASUS SOLID CRADLE MOUNTS. 486RWHP/475RWTQ.LOTS MORE.

11-01-2022, 04:25 PM	#4
ss camaro-monte Drives: 2015 camaro 2ss, 87 monte ss Join Date: Jun 2016 Location: Houston Posts: 241	I know about all the valve spring requirements. Just didn't want to have to mess with the rockers every 20k and from what some of the forum members have posted I would rather do something different with the rockers if available but if there isn't a solution with stock valve covers then the CHE will be my go to.

11-01-2022, 06:06 PM	#5
ss camaro-monte Drives: 2015 camaro 2ss, 87 monte ss Join Date: Jun 2016 Location: Houston Posts: 241	Just talked to GPI, might be getting the Manton trunnion kit. Will find out more tomorrow.

11-04-2022, 04:41 PM	#8
ss camaro-monte Drives: 2015 camaro 2ss, 87 monte ss Join Date: Jun 2016 Location: Houston Posts: 241	Went with the Manton's Trunnion Kit

11-05-2022, 01:07 PM	#10
ss camaro-monte Drives: 2015 camaro 2ss, 87 monte ss Join Date: Jun 2016 Location: Houston Posts: 241	Yep, I know all about the springs and trunnions. I just wanted to get the best parts possible. GPI said the Manton is a step above the CHE with slightly more surface contact and oil. I will also have the .660 BTR springs but I will have steel retainers. My ramp rates are milder compared to the standard GPI cams and my lift is only slightly less but was told the springs and trunnions would have to be checked at 20k but likely will go several thousand longer due to the milder set up. Either way it will all work out.