My friend finally decided to send his block to the machine shop to get everything ready for a stroker kit. He had asked me to make a thread for him to bounce ideas off of you guys since you all have helped me so much.

So far this is what he is thinking:
Bottom end

Heads or the 64 cc version.

Cam

Any input would be nice.

He also is trying to buy from a Northernautoparts.com? I have told him to stick with summit but hes trying to save a little so if you all know of better prices please let us know.

 

I assume he sent a 350 block to the machine shop, and not a 305 block, right?

 

yea of course! lol I had a .060 over block so its just getting checked over and what not

 

ok, just checking. The way the original post was worded it sounded like you sent the 305 block to the machine shop expecting it to come back with a whole lot more displacement.

On to the heads. Those E-Street heads are an entry level head, and because of that, the valve springs (and to a lesser extent the valves) aren't very high quality. Anybody running a real cam needs to replace those springs. Once you do that, those heads wind up costing more than trick flows, which are a superior head all around.

That flat tappet cam may not cause problems with it's modest valve lift, I'm not sure. But, that cam has a healthy intake duration, but a crap-ton of exhaust duration, along with a super tight LSA. To me that sounds like the type of cam that somebody would run on a motor with stock heads that have a poor exhaust flow, maybe even with exhaust manifolds instead of headers, but wants that rumpity sound of a poor idle. I really don't see that as a good performance cam when using good quality aftermarket heads. I'd really look at something with a little less intake duration, a TON less exhaust duration, and a much wider LSA.

But before I get too far ahead of myself, what are his goals for this motor?

 

Honestly as far as goals go im not entirely sure. I would guess 400s? as far as power goes. He said he would like to have a nice weekend cruiser thatll turn heads. As far as i was concerned i tried to convince him to twin turbo his to match mine but he wasnt going for that. Have a better recommendation on cam and head combo?

 

These are extremely close to what I am looking at. I was told that they are actually pretty good.

 

As far as a cam goes probably something like this

 

I'm not super familiar with the Darts, but the first thing that jumps out is the huge combustion chamber size. That's going to kill compression.

If he's looking for a street cruiser, you can't beat a 383 (388) with a set of Trick Flow 180s or 195s and a nice cam in the 224/230 112lsa range. It'll idle decent, but still have more than enough cam to sound nowhere near stock, and have a great, usable torque curve which will make it great on the street, and plenty fast at the track.

 

I wasnt sure on what his Comp. will be at but they do come in the 72 or the 64 size. just trying to stay away from race gas so he can push the 10:1 comp right?

 

flat top pistons with 64cc heads will be right in the neighborhood of 10:1, give or take based on how far in the hole they are, etc. A general rule of thumb is to go with a smaller head volume and then choose your pistons to get the compression you want. Heads with smaller chambers tend to be less detonation prone and make more power.

 

Alright, ill relay the info and hopefully she will be built soon.

 

Thanks again

 

This was the bottom end he was talking about: this

Is it worth it or should he just go with the Summit one?

 

Something doesn't seem right with that. It says it uses scat 9000 series parts but my scat rotating kit cost $1000, and the bearings coming with it obviously didnt make up for that $500 difference.

 

Thats what I was saying, I understand trying to save some money but just doesn't add up

 

Has he done the calculations ?
A big ( longer duration ) cam like you linked drops the effective CR (DCR ) so you need more (higher ) static CR to start with

 

I think we decided to hit the 110 or 112 lsa cams instead. As the block is still in the machine shop we will have to wait.

 

Anything that ignores:

http://www.crankshaftcoalition.com/wiki/Quench

with a piston type or deck height where the piston is way down in the hole is detonation prone no matter what type of material head you use and a high SCR.

Cam selection is dictated by SCR:

http://www.crankshaftcoalition.com/w..._compatibility

Those guidelines are so the full advantage of ignition timing can be used.That being on iron heads no bigger the a SCR of 9.5 and a DCR of 8.5 or aluminum SCR of 10.5 or again a DCR of 8.5 to 9.0.

We have seen time and again the same mistake on strokers.If the intent is to build a stroker and then try to save money on heads,cam,exhaust,then just don't build the stroker in the first place.Save the stroker money for really good heads on a 355.It's the heads ,where on any SBC,the power is made after a good reliable bottom end is built.

 

While I am at it.We like to see the correct parts selection for the target .040 with a 0 deck and then use a .039 compressed head gasket.The main reason behind that is so not have to deal with "shim" thin head gaskets where the deck finish has to come into play to seal long term.It is just a more natural progression choosing parts and a deck height allowing a better sealing head gasket of .039 finish setting the .040.

 

It has nothing to do with not wanting to spend the money. Its shopping around bc as we all know summit isn't always the best or cheapest. That being said im here to get some input on things that are known to work so I or any one else dont steer the kid wrong

 

Read the links.That will give you guide lines on what to look for in parts.It's the straight skinny on that.

www.competitionproducts.com

It a pretty good company to work with.

 

Already started lol. Thanks for the tip. Just trying to read up as much as possible that way when we talk to the machine shop and parts guy we have a good base to work off of

 

In the same hand,if you have any questions do post them and as always here pictures count huge.