Ok so i want to get different heads but don't know what to go with I was thinking the R/T heads would breathe better than my magnum heads but I have no idea if I should go after of just get a set of R/T heads.

 

The Magnum R/T heads are out of production and have been for some time, they are still listed for sale, but try to get some.The R/T heads are tons better than Magnum heads...And won't crack like Magnum heads.

 

I keep hearing conflicting stories on that..... some folks say the R/T heads are better, others say the R/T heads are the same thing is what's on a non-R/T motor? Could anyone clear that up for me??

 

Big difference, and I've argued this on here before.

All 5.9 Magnum Motors, even the motors that came in Dakota R/Ts came with stock Magnum Heads. Period. A magazine did a test on a one off Dakota R/T with Magnum R/T heads and an M1 on it, so guys say Dakota R/Ts came with R/T heads. But a Dakota R/T was NEVER offered to the public with R/T heads.

Now to answer your question: According to "How to build Big inch Small Block Mopars" the out of box Magnum R/T heads are worth 20 HP over stock Magnum heads, the R/T heads don't crack and in the right hands they can be ported to flow over 300 cfm at .600 lift.

Magnum R/t heads came in two flavors. 1.92 and 2.02 intake valve size, the 2.02s were available bare only, the 1.92s came built with .525 springs and stock 2 piece Magnum valves (ouch), or bare.

Head porters prefer to start with 1.92 heads even if they are going to open up the intake to 1.97 or 2.02 (or 2.08) due to the infamous Mopar core shift. I've had a couple R/T heads that were so bad I sent them back.

FWIW....I have 1.97 Magnum R/T heads on my Dakota ported by Ryan Johnson. http://www.nmbuilder.com/head.jpg

In summary...The aftermarket Magnum R/T heads made by Mopar are Waaaaay better than stock Magnum heads, but don't buy a pair without looking at them first. They were made by Mopar after all.

 

Can the R/T heads be identified by casting numbers?

 

I have a set of R/T 1.92 heads for my ram just need to find someone good to port them for me.

 

They have R/T cast into the side.

 

Way to easy.

Thanks.

 

Ryan Johnson, small block Mopar is all he does.

http://www.shadydellspeedshop.com/

http://www.shadydellspeedshop.com/magnumrt.htm

 

The EQ heads are better bolt on as well. I was amazed at how much better the bare casting alone was when I got my set and compared them to the stockers.

On the EQ's as cast, here were the differences I noticed:

-Ports and chambers are much smoother. As cast surface finish is much better.
-No visible casting flash, humps, chunks, or other crud in the ports.
-The pushrod pinch as been opened up. Didn't measure, but it's clearly visible.
-The valve guide boss is much smaller and tighter, less to impede flow.
-Hardened seats in exhaust ports.
-Smoother short side turn, there is still a small shelf , but it isn't sharp like the cast heads.

I've been told (no personal knowledge) the R/T castings have a lot of meat to cut out to be able to improve flow/ reshape ports, etc. I don't think the EQ's have as much meat to work with. If that's true, the R/T's could probably be worked to flow better than the EQ's in an all-out port effort on both sets. You'd have to get the exact same shop to port both sets to know which is the clear winner.

EQ's are readily available, R/T's are not. Hughes claims the EQ's flow better than R/T out of the box. Scroll 3/4's down the page:

http://www.hughesengines.com/TechArt...ated112009.php

I agree with adobedude, if I ever send my heads out to get a full blown porting done, shady dell is getting my business.