Shawn MacAnanny

iTrader: (12)

I just bought this cam and eventually plan on going with a 408 bottom end, but i want to know if it will clear the stock setup? I have patriot golds, stock rockers, stock pushrods. Any idea?

teke184

iTrader: (5)

i doubt the pushrods will work with it...besides...stock rockers SUCK. get some hardened ones....but check for proper lenght first

BlackScreaminMachine

iTrader: (17)

Thats a healthy cam, id use some clay and check PTV clearance and get a pushrod lenght checker too. (on the stock setup)

Patrick G

iTrader: (14)

408 pistons should have valve reliefs. As mentioned above, you will need stronger pushrods than stock, and better springs. Patriot Extreme duals or AFR 8019 duals with Ti retainers. Stock rockers get into awkward wipe patterns at .650" lift. It's better to use the Yella Terra Ultralight rockers. Otherwise, that's a great cam choice for a 408, especially if the heads have smaller valves.

Shawn MacAnanny

iTrader: (12)

Oh i want to put it on a stock bottom end i just need it to run for right now. pushrods can break so can springs and valves get bent eventually. i just want it to run in a valve spring only engine

Shawn MacAnanny

iTrader: (12)

Anyone know if it will work for sure? I guess i just have to pull off the head and use the clay idea huh? can i reuse the headbolts and headgasket?

Frost

iTrader: (45)

have fun tuning that thing

blueeyeddevil141

iTrader: (5)

Hah, enough said.

Shawn MacAnanny

iTrader: (12)

Im going with Victor JR intake, MSD ignition setup, and an 800cfm or so carb. It shouldnt be to horrible to tune. A few jet sets, and just switch between timing selections and it should be good to go. my stall is advertized at 3200 at 400hp so i figure the engine should be somewhere around 500 with cam, headers, intake and all so itll stall more like 3600rpm. Its goin behind a rmvb th400.

Patrick G

iTrader: (14)

With that cam you MUST run the longer, stronger pushrods than stock and certainly consider running the upgraded Patriot Extreme duals over the plain Golds. With a stock headed motor, your P to V clearance will be tight, but it should BARELY fit.

Shawn MacAnanny

iTrader: (12)

What length pushrods? Stock are 7.400 right? Why would i need longer ones?

Patrick G

iTrader: (14)

To get more lift than stock, cam manufacturers make the backside of the cam smaller. With a smaller diameter cam than stock, you must run a longer pushrod to make up the difference (and maintain stock plunger depth). 7.425" pushrods come closest to ideal with those lobes.

Shawn MacAnanny

iTrader: (12)

Are you positive thats what i need? Im ready to buy them. I have the cam card if you need any info off of it.

Patrick G

iTrader: (14)

If your heads are unmilled and your gaskets are stock thickness, then you want the 7.425" pushrods with XE and XE-R lobed cams. With a .651" lift cam, you may actually need 7.450" pushrods. Stock pushrods are 7.38". Remember, higher lift means cams with smaller base circles. To maintain stock plunger depth, you need a longer pushrod to make up the difference.

Shawn MacAnanny

iTrader: (12)

So should i just buy the thunder racing pushrod length checker?

Shawn MacAnanny

iTrader: (12)

Valve adjust HYD HYD
Gross Valve Lift .647 .647
Duration @
.006 Tappet Lift 285 285

Valve timing Open Close
@.050 INT: 11 BTDC / 43 ABDC
EXH 51 BBDC / 3 ATDC

These specs are for cam installed
@106.0 Intake centerline

Duration @ .050 235/235
Lobve Lift .3810/.3810
Lobe separation 110.0


It's a 110+4 and i have a sticker on the box where the cam was check that says its a 235.8/236 .651/651 110LSA

MPHmotorsports

iTrader: (18)

I think Pat is guideing you in the right direction on the 7.450 length pushrods.
In the past cam's that we have used with similar lifts have either been a 7.425 or 7.450 but mostly the 7.450. I would buy those and still check the lemgth to be sure.
A couple things you can not do.
You can not buy a rocker system that is heavier, and if your going to keep the stocker's for now they will work but the Ultra Light Yella Terra's will be a wise idea and the rocker's can transfew over on the bigger motor once you out it together.
You can NOT use the stock pushrods, Gaskets, Or head bolts. You must buy a longer better pushrod, and new gaskets/bolts.
The Gold springs I would also ditch and use the Extreem spring instead. If your kit is brand new sealed in the box give us a call and I can swap kits out for you for a small charge plus shipping both ways.
Or just throw it up for sale here on Tech.
P/V clearence IMO should be close but work just fine. Would I check it on this cam... yep, would I assume I was wasting my time checking it...yep, but I would do it anyways.
And please get a new Timing chain while you in there. You will also need a new crank bolt, front cover gasket, and water pump gaskets at the least.
Jeremy

Shawn MacAnanny

iTrader: (12)

Im not trying to spend a whole lot of money on the engine just yet. I bought the engine on ebay so i dont know how well it even runsor if it even does. It should but i dont want to waste anymore money than i have to at this point as i plan on a bearing going or something. By the time was all said and done selling my efi and accerssories this longblock only cost me $200. It's basically a template for swapping into my 68 bird.

When the bottom end goes it will be a stroker with some nice heads so the springs being maxed out arent too much a concern to me right now so long as they work as with the rockers. The pushrods i must have so i will get. I have the timing chain and all new viton valve seals. New timing cover, new oil pain new gaskets for both. Why do i need new headgaskets and head bolts? The engine is in my dining room right now actually. I'm just slapping it together for now as a template. I decided to do the cam and springs while i had it out to see if i even liked the cam.

MPHmotorsports

iTrader: (18)

B/C up top your said you were pulling the heads. The bolts and gaskets(if their multi layer steel) I guess can be reused but it isn't a good idea to reuse either.
The bolts won't torque correctly most of the time and have been known to break.

Shawn MacAnanny

iTrader: (12)

Oh yeah that was before i found out i could measure ptvc without removing the heads. sorry for the confusion.