Roller 5.0 lifters in a non roller 5.8

holset35 · May 22nd, 2011, 10:29 PM

I am at the ending stages of my build.I put my roller cam X303 with the lifters that came with the cam in a 359w.The lifters have dog bones on them to keep them from popping out.Can I run this set up or have switch things up.

fogged306 · May 22nd, 2011, 10:51 PM

No, you need either linkbar lifters, or you have to get a small base circle cam and tap the block for the lifter hold down.

Frankenstank · May 22nd, 2011, 10:51 PM

I do not know that motor but if the heads are for flat tapper litters then you ussually have to change the rocker studs.

If they are pressed in they make a tool to pull it out of you can do so wit some washers and a nut.

After pulling you then mill the rocker boss down to proper hight drill and tap the hole to accept the correct rocker stud.

Best bet is to find a head that is allready set up for roller rockers.

I also believe there is a keeper for the dogbones that will need to be installed involves drilling and tapping the valley. Which would be a problem if your motor is allready built.

Don't qoute me on all of this but it should get you pointed in the right dirsection.

Give me some feedback on what I have said so I know how correct I am I do not want to lead someone down the wrong path espically when stuff cost as much as it does.

holset35 · May 23rd, 2011, 07:55 AM

The heads are gt40p and 1.6 rockers.What is the problem if i continue with my current set up the engine is ready to start just have to put the distrubutor on.

fogged306 · May 23rd, 2011, 08:32 AM

You won't need to do anything to those heads.

The issue you will run into is that without a hold down, those dog bones won't stay pressed down against the notch they sit on. Then nothing will stop the lifter from spinning in it's bore and when a roller lifter turns sideways, it will wipe the cam lobe. Lifter bores weren't as tall in the non roller blocks, so to get them to the proper height where the lifter hold down will work properly, you need a cam with a smaller base circle, so they sit lower in the bore. A roller lifter is taller than a flat tappet.

The better option is to get linkbar lifters. You can run a regular roller cam in that block that way (thicker cam core is stronger, resists valvetrain flex better) and the linkbar design is superior to the dog bone and hold down design.

69fastback · May 23rd, 2011, 10:22 AM

Fogged covered it, but do not start your engine like that. You will most certainly have catastrophic failure.

holset35 · May 23rd, 2011, 08:45 PM

will i have to get diffrent push rods

fogged306 · May 23rd, 2011, 10:17 PM

Yea you will most likely. Get a pushrod length checker first to determine your pushrod length you'll need. You'll either have to flip a plunger on one of the lifters to make it a solid, or take out the valvesprings on a cylinder and replace them with checker springs. Either way, the purpose is to not push the hydraulic lifter in while checking for pushrod length because it will give you false readings. Are the GT-40 heads you have still pedestal mount rockers or have they been converted to stud mount?

93hatch · May 23rd, 2011, 10:34 PM

need new pushrods unless you get super lucky and the linkbars turn out to be the exact same height as the reg lifters, which they prob wont

May 22nd, 2011, 10:29 PM	#1
holset35 Regular 1986 LX NOTCH Join Date: May 2010 Location: MICHIGAN Posts: 140 iTrader: 0 reviews	Roller 5.0 lifters in a non roller 5.8 I am at the ending stages of my build.I put my roller cam X303 with the lifters that came with the cam in a 359w.The lifters have dog bones on them to keep them from popping out.Can I run this set up or have switch things up. __________________ 86 TRUNK 359w-SRP 8:1-GT40Ps-X303-MAC LONGTUBE'S-VICTOR JR INTAKE-850 HOLLEY-T-5-410's-150 shot

May 23rd, 2011, 07:55 AM	#4
holset35 Regular 1986 LX NOTCH Join Date: May 2010 Location: MICHIGAN Posts: 140 iTrader: 0 reviews	The heads are gt40p and 1.6 rockers.What is the problem if i continue with my current set up the engine is ready to start just have to put the distrubutor on. __________________ 86 TRUNK 359w-SRP 8:1-GT40Ps-X303-MAC LONGTUBE'S-VICTOR JR INTAKE-850 HOLLEY-T-5-410's-150 shot

May 23rd, 2011, 10:22 AM	#6
69fastback Premium Member 1969 Mustang Mach 1 6.824@101.61 Join Date: Aug 2006 Location: Oklahoma jackass, get to driving Posts: 5,565 iTrader: 0 reviews	Fogged covered it, but do not start your engine like that. You will most certainly have catastrophic failure. __________________ ./___ _ ____ ___ \. ( ]]] _ _ O _ _ [[[ ) \_ o _ _____ _ o _/ \|___\| ......... \|___\| http://www.youtube.com/watch?v=HyYU3...e_gdata_player

May 23rd, 2011, 08:45 PM	#7
holset35 Regular 1986 LX NOTCH Join Date: May 2010 Location: MICHIGAN Posts: 140 iTrader: 0 reviews	will i have to get diffrent push rods __________________ 86 TRUNK 359w-SRP 8:1-GT40Ps-X303-MAC LONGTUBE'S-VICTOR JR INTAKE-850 HOLLEY-T-5-410's-150 shot

May 23rd, 2011, 10:34 PM	#9
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	need new pushrods unless you get super lucky and the linkbars turn out to be the exact same height as the reg lifters, which they prob wont __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

May 22nd, 2011, 10:51 PM	#2
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	No, you need either linkbar lifters, or you have to get a small base circle cam and tap the block for the lifter hold down.

May 23rd, 2011, 08:32 AM	#5
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	You won't need to do anything to those heads. The issue you will run into is that without a hold down, those dog bones won't stay pressed down against the notch they sit on. Then nothing will stop the lifter from spinning in it's bore and when a roller lifter turns sideways, it will wipe the cam lobe. Lifter bores weren't as tall in the non roller blocks, so to get them to the proper height where the lifter hold down will work properly, you need a cam with a smaller base circle, so they sit lower in the bore. A roller lifter is taller than a flat tappet. The better option is to get linkbar lifters. You can run a regular roller cam in that block that way (thicker cam core is stronger, resists valvetrain flex better) and the linkbar design is superior to the dog bone and hold down design.

May 23rd, 2011, 10:17 PM	#8
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	Yea you will most likely. Get a pushrod length checker first to determine your pushrod length you'll need. You'll either have to flip a plunger on one of the lifters to make it a solid, or take out the valvesprings on a cylinder and replace them with checker springs. Either way, the purpose is to not push the hydraulic lifter in while checking for pushrod length because it will give you false readings. Are the GT-40 heads you have still pedestal mount rockers or have they been converted to stud mount?

Remove Advertisements Sponsored Links
Ford Mustang Forum Advertisement

Threads Similar to: Roller 5.0 lifters in a non roller 5.8
Thread	Thread Starter	Forum	Replies	Last Post
Will these roller lifters work	saldoggs	5.0 Mustangs	4	December 20th, 2008 11:37 PM
Roller lifters stock?	Hunt_chevs	5.0 Mustangs	4	March 25th, 2008 03:15 AM
Lifters and roller rockers?	MySallyMI	99-04	6	April 16th, 2007 06:30 AM
roller lifters	Steves LX	5.0 Mustangs	7	April 9th, 2007 09:29 AM

All times are GMT -4. The time now is 03:09 AM.
Contact Us - Modded Mustangs : Ford Mustang Forums - Privacy Statement - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2012, Jelsoft Ent. Ltd. & SEO by vBSEO 3.3.2 ©2009, Crawlability, Inc.