RHS or EDDY
I am going to replace the heads on my 408 in a few weeks and don't want to make a mistake. The motor now has a set of big valved J heads cc'd @71 they have had some port work on them but I do not know the extent. My motor is now 9.2:1 comp, and a street only motor.
Specs:
1974 360 bored .030
Wiseco -20 pistons
Eagle crank 4"
MP 248 - 484 Hyd cam (installed 4* advanced)
Edelbrock Air Gap intake
edelbrock 600 cfm (changing to 750-800)
4 speed
3:55 sure grip
28" tires
I want the car to run on Pump gas. Looking for advice on what heads to install for a healthy street machine. It runs OK now but just does not set me back the way I would like. I am thinking compression increase might help?????
Thanks
Well I thought I was just asking about peoples opinion on which head they thought would work best for me. I didn't mean to start a product or vender war.
I don't really remember asking if I could afford one over the other or could afford to have them worked on to meet my requirments or if my cam or carb sucked. I am no expert when it comes to building a motor and I never claimed that I was, so if you think I could do better by tuning different or anything else I am always open for suggestions, but please save your criticism for someone else. I do however appreciate everyone that gave me their honest opinion about which head they thought was best suited for my use, and why.
Thanks
No body criticized you.
your opener had lots of question marks at the end where you ask about raising compression to make up for the lack of power... well, that gives us an idea what level you're at. compression of a full point might give u a 3% hp increase, but what hp are you at now?.......meanwhile timing, carb alone can give 20+hp depending on how off it is and choked, but thats just yrs of experience talking...
So money is no object... out of whats listed...go with the eddy's and have them full ported, even have brian port them....and after that get a cam like the one I mentioned earlier and 1.6 rockers 'if u dont already have them'...then top it with a worked intake manifold and 950 holley....and of corse figure how much milling needed if any to raise up the compression a point or so.
Eddy's have Better/wider cross section/capability, lighter, & can run a slightly higher comp ratio too.
If the rhs would rid themselves of the massive push rod pinch, they would almost be neck and neck, but still not quite with the cross section and weight.
Maybe you should start from scratch, i mean ....you're gonna surpass the price of a new short block with the new top end anyways...an If you're gonna do it, you might as well do it once and be done.
fwiw There is also a member/machinist on here named Rob who lives in canada, if you search you'll find him on here.