Cylinder head question

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It will physically bolt on but I believe they have extra head bolts and a different valve angle not to mention they are way to much head for a 318
 
thanks for the info. Im only 20 years old and just starting out with gaining motor knowledge so i apoligize for maybe futire stupid questions. if i want to build a 430 hp 318 what would be a good head to go with if I wanna use alum ones?
 

I wouldnt call you stupid at all, you bought a Dart! Eddy RPM's would probably be your best bet. You'll more than likely have that much in a set of older heads or newer magnums to have them ported to flow the same. But then you're still left with iron heads.
 
Mopar70, don't be shy to ask any questions. Just you asking about W9s is a good thing in my book. W9s come in 48 degree (improved tappet angle) and 59 degree (stock tappet angle) versions. The 59s will bolt onto any OEM small block but are really meant for highly modified 340/360 (especially if stroked) motors. Ideally, 59 degree W9s on top of a 59 degree "R" series block is a nice setup only to be upstaged by the 48 degree versions of both the head and block.

I also agree that a set of Eddys is the way to go. Have you ever thought of building a 360 instead of the 318? Granted, you may have to acquire one but the cost to rebuild both is going to be very similar but the output of the 360 will be much more noticeable. A good core 360 varies but I am sure you could get one for $100-$250 (maybe a little less if you are only going to get the shortblock and go with the Eddy heads. Feel free to ask any questions you may have.
 
Thanks man. Yeah I have thought about getting a 360 but the 318 was given to me and I have already gotten it hot tanked and bored out 30 over so I was planning on maybe buying a 360 as soon as I get the 318 done. Im just kinda already in the works with the 318. I will have to check out that Eddys stuff. Also thanks again for helping me with the w9 question to because everyone in my family is a chevy fan so they dont know anything about any w9 heads.
 
No problem. Re: the 318/360. Although you are all ready into the 318, you may want to still consider building the 360. Once the 318 goes in, you may not want to pull it out. It really depends on if you can live with it for awhile or not and of course, your funds. The prepped 318 block can always be sold or possibly traded for a 360 (or something else that you may need). Anyway, food for thought. BTW: You are going to be looking at about $1400 for a set of Eddys.
 
heard a lot of good things about factory casting 308? heads swirl ports, any thoughts on the subject for his 318? adammmmmmm wheres that post? haha
 
There's a lot of people here that swear by them for a nice street build up. I have never had the opportunity to do so. All of my builds (in the day) were X/J heads followed by W2/W5/W9 buildups and then a couple of with Eddy/IndyBrock heads when they came out. I think you will get several people chiming in with their impressions on the use of the 308s.
 
Keep your 318. Buy the eddys if your going to go 360. start with a good cam. Comp xe 262 or 268. Get a set of 360 heads, they dont even have to be J or X. clean them up yourself (bowl blend etc) and then take them to have a good valve job done. Mags would work well as well. The past Mopar engine challange, 3 out of 5 builders used Mags, even the guys from Indy, so that tells you they work.
What intake are you thinking? Preformer would be a good choice for the teen. You will get the best bottom end response with it. I would use it if you were keeping your stock heads.The Air gap will give you higher rmp's but doggish down low on your teen.
What do you want to use the car for? Might i suggest getting some KB 167 pistons. This will get you close to a zero deck if you use MoPar thin head gasket.

I guess it all depends on what you want and how far you wanna go. The 318 is a great moter! and if done correctly, can produce!
 
Yeah I want to just keep it as a car that I will drive when I want. Not a daily driver more like a " I feel like takin my car out tonight and cruisin " I may drag race it from time to time but more street cruisin . I figure with a v8 in a lightweight a body with about 430 hp itll be a pretty quick car. 1400 isnt bad. I have an unlimited spending amount so I am tryin to get a goal of 430hp. Intake I wanna try and run the dcc-4592408 single highrise intake manifold from summit.
 
Mopar70Dart said:
Yeah I want to just keep it as a car that I will drive when I want. Not a daily driver more like a " I feel like takin my car out tonight and cruisin " I may drag race it from time to time but more street cruisin . I figure with a v8 in a lightweight a body with about 430 hp itll be a pretty quick car. 1400 isnt bad. I have an unlimited spending amount so I am tryin to get a goal of 430hp. Intake I wanna try and run the dcc-4592408 single highrise intake manifold from summit.
Click to expand...

I am not sure which manifold this is but if it is a single plane, you may want to consider running a dual plane on the street.
 
Like Adam mentioned, the biggest issue with using W9s is the valve angle. Stock pistons won't work with the W9s.

430 HP out of a 318 that you plan on driving on the street seems ambitious to me. Are you planning on keeping the stock stroke, or going with a 4" crank and actually having something more in the 390" range? Is this going to be an automatic car, or a 4-speed?

Here is some information about W9s that might be interesting reading.
http://www.shadydellspeedshop.com/faq.htm
 
damnimcooltom said:
Like Adam mentioned, the biggest issue with using W9s is the valve angle. Stock pistons won't work with the W9s.

430 HP out of a 318 that you plan on driving on the street seems ambitious to me. Are you planning on keeping the stock stroke, or going with a 4" crank and actually having something more in the 390" range? Is this going to be an automatic car, or a 4-speed?

Here is some information about W9s that might be interesting reading.
http://www.shadydellspeedshop.com/faq.htm
Click to expand...

Yes, as mentioned above, there are 59 degree and 48 degree W9s. BTW Mopar70, your desired 430hp rating is at the flywheel I hope.
 
"59" and "48" degrees refer to the lifter angle. I am referring to the valve angle. The stock small block head has an 18 degree valve angle. Most W9s have a 15 degree valve angle. The valve reliefs in the pistons need to match the angle of the valve.

The 48 vs 59 degree issue is mostly a problem with the pushrod angle, which can be a major hassle, but there are ways to make it work. This involves offset lifters and/or grinding for pushrod clearance. Grinding for clearance decreases the amount or porting that you can do on the heads.

Ryan describes both issues and others on that link I posted.

In any case, W9s are way too much head for most any street driven 318.
 
I agree, W9s are way too much for a street driven 318 and yes, Ryan Grom Shady Dell), does explain all the ins and outs beautifully.
 
hey mopar70dart just wanted to let you know that summit intake won't work with a stockhood very tall intake i sent mine back
 
Yeah GTX I was hopin at the flywheel. Thanks for the heads up mr 318 but I have a six pack scoop and am hoping that will help a little. Yeah I see what you guys mean with the w9. Why the dual plane though? I will take all your guys advice : )
 
Mopar70Dart said:
Yeah GTX I was hopin at the flywheel. Thanks for the heads up mr 318 but I have a six pack scoop and am hoping that will help a little. Yeah I see what you guys mean with the w9. Why the dual plane though? I will take all your guys advice : )
Click to expand...


sixpack scoops will take alot of intakemanifold before geting full
had a holley strip dominator intake manifold (pretty tall single plane) and a 5" tall aircleaner and that fitted just beutifull under my sixpack scoop! now i´m hiding a tunnelram and two carbs under it and its alitle tight to get an aircleaner in there but i will make it happen for alitle while (just until the goverments yearly safety inspection thing is done)
 
A single plane intake will cause you to give up low end power. A dual plane will be better for low end, but not as good for high end. A performer RPM is a decent dual plane that will allow a bit of a compromise between the Performer and most single planes. Really, you should design your whole engine as a package, so that all of the parts work together for the best results. I don't think you're going to get 430 hp out of a 318 without giving up a lot of bottom end.
 
I agree with Tom ... design your whole engine as a package. Better yet, try and build the entire car as a package. You will have to be realistic when building a car. Your intended street use needs to utilize parts that will work together for the purposes you all ready stated.

As far as the differences between single and dual plane manifolds, Tom has taken care of that above.

I don't know if the 430HP expectation is realistic for how I think you want to build the motor but then again, I believe the conversion to rear hp is based off of a 20 (maybe 25%) drop in flywheel hp so that would mean that you would have a rwhp rating of about 322-344hp. That would be impressive for a 318 seeing only street-use. Let us know which route you decide to take.
 
I definately will let you know. Thanks again guys for all your input. I will be getting my motor/block back soemtime this week so I will post pics. I think I will go with the dual plane.
 
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