cam suggestion
 

building a 468 and was thinking of going with the comp cam 284hr do you guys think this cam will work with stock cast iron exhaust or will i get reversion.thanks

If you're building a 468 why would you stay with stock exhaust? I would imagine its budget related but at that point you'd be better off staying with stock everything. i don't know the specs on that cam but merc uses some pretty tame cams for the reversion reason. I think the stock 502 mag cam was on a 115.5 LSA. With like .483 lift. You can get a hold of gils or stainless marine for a decent price. Would certainly be worth it

Cam talk again :picard1::picard1::picard1:

http://www.cjponyparts.com/comp-cams...-302/p/314428/


Shows its for a Ford small block

Assuming you're referring to this one...

http://www.compcams.com/Company/CC/c...?csid=449&sb=2


I have one in a 439 cid BBC.. it WOULD have reversion with stock exhaust manifolds.....
I was running Eddie Marine manifolds with the long riser option and it worked fine...
https://www.youtube.com/watch?v=2UX0wQBukI8

yes boatally insane that is the cam I'm talking about i ran gills on my last boat and ended up selling them because i didn't gain any mph out of them compared to the stock ones. thanks guys.

The exhaust itself isn't going to net the gains. It gives you the ability to add cam to get the gains. Good luck either way.

this is a budget build for me i have a hydrolic roller cam from bob m that my brother gave me and i have set of solid roller lifters from a motor i had before. i was wondering if i can use these lifters with that cam

Slowly put the wrench down and step away from the motor.

You may be the nicest guy in the world with nothing but the best intentions.... However your budget build is about to cost you a lot more money and you will probably have a new hobby before it is all said and done.

say no more

But I will....

The secret to building a budget motor is to find a good established and proven recipe and follow it. Figure out where you can cut corners and where you cant. Yes you may leave some power on the table this way, but that is much preferable over sitting on the dock because your sh!t is blown up again. Cheaper too.

Search, the motor you are looking to build has been built many many times here.

Those stock exhaust manifolds... keep your eyes open... I picked up a set of nice used stainless marines for 600 of fb swap shop.

CAms have been discussed a lot lately. 731s, 741s, 500 efi and 525efi cams are all popular in basic builds, with some forum reading you will begin to understand the differences. while your doing all this research keep your eyes open for deals. I just picked up a new 731 for half the standard price.

Its going to cost more than you think, but that will keep it from costing more than you can imagine.


Think of the motor as an air pump. Air has to get in, pass thru and get out.

Previously you put Gills on a motor and didnt gain anything. Thats because the previous exhaust was capable of getting the air out that went in and passed thru.
So it did no good to make it let more air out if you didnt put more in.

THe cam, heads and valvetrain let air pass thru.

THe Carb and intake will let more in.

It does no good to let more air in if it cant pass thru and get out

It does no good to let more air pass thru if you dont let more air in and out.


To go even further (like Bluto, Im on a roll) If you stuck headers on your grandmas buick, it would do nothing but rumble. If you put a big cam in it, it would just lope and run like crap. If you put a big carb on it, it would get horrible mileage and fall on its face when you hit the gas. You put a big carb, big cam and headers all on grandma's buick, she is going to soil her depends and Grandpa is going to take you out for a steak dinner and buy you a lot of beer,,,,,

ok my build is a 468 with large oval ports ported and polished with 2.25 and 1.88 valves my brother is giving me a hydro cam from bob but don't know the cam specs hopefully theres a part # on there that i can call him and get the specs. also wondering what cr to go with was thinking 10:1 cause i run 93. if anyone has a nice pair of stainless marine exhaust for trs setup let me know thanks.

find an hp500efi cam or for a little more power, the proven crane 741.