Head Identification

[jwelshdesign]

I am doing a rebuild on a engine but I don't know a lot of the specs so now would be a good time to get it sorted out. Trying to identify these heads. I cross referenced them against GM castings but had no luck. The use of adjustable guides leads me to believe they are aftermarket. When I google 305 I-058 I set world SR torquers. But I don't see any logo on the heads like the images show.

Any help would be appreciated...

 

[LS6 Tommy]

Those are indeed World Products S/R 305 heads, so I guess (I hope) your rebuilding a 305...

Tommy

 

[Doober]

It wouldn't by chance happen to be for the green machine you bought from Appsk8r would it?

 

[jwelshdesign]

Tommy, I had to rebuild the bottom end which is a 385. So the heads are on a 385 with a mild cam.

Doober this is infact the combo from Appsk8rs car.

The bottom end was shot and needed to be freshened up. I didn't change anything on the combo this time around. Just putting everything back together as it was, with a freshening.

 

[LS6 Tommy]

I honestly don't remember any performance spec's on Appsk8r's car, but generally using 305 heads on anything bigger than a 305 is considered to be unproductive at best. Even most aftermarket 305 heads. Those heads you have usually have 1.94/1.50 valves, so they don't flow enough to truly support much more than a 305. If you have the ones with 2.02/1.6 valves, the shrouding wit hthat teeny chamber is terrible...

Tommy

 

[jwelshdesign]

Tommy, thanks for the feedback. I was thinking the same thing about the heads being for a 305. Also, the cam that is in the car is a old cam dynamics cam rated at 212/212... basically a towing cam.

I plan on running this combo (the one that came with the car) for this year only. My plan is to start assembling parts to build a real nice power plant. Hopefully the refreshed engine gets me though the summer enough to have some fun.

Thanks for helping know what I am working with.

 

[nillabu]

The 305 heads have 58cc chambers. This link will give you a few more specs if you are intrested.

http://www.theengineshop.com/produc...n-heads/s-r-stock-replacement-iron-heads.html

 

[jwelshdesign]

thanks for all the feedback guys its been a huge help. Nice to know what I am working with.

 

[nillabu]

They aren't a bad alternative for stock replacement/open chamber/iron heads in mild applications I guess. I didn't think these heads required guide plates due to the size of the push rod holes cast into the head. He may have had to enlarged them or I'm missing something. I know there are many better choices out there. I got a good deal on a new set of S/R Torquer 67cc/2.02's way back when I was building my 383. No issues yet. I don't know that the claimed raised valve cover rails help prevent leaks all that much. I have to really keep an eye out for leaks at the lower/rear corners. Usually change gaskets every spring. To me, it looks and acts like the drain back holes are alittle smaller than they should be. I'm running a high volumn pump in this engine and that may be contributing to the occasional leak IDK.

Steve

 

[jwelshdesign]

I'm sure they are greatly restricting airflow for the cubic inches the engine is. Something around a 200cc head would probably really wake this engine up and so would a nice 280 cam, but than we are talking about a total rebuild and changing this entire combo which would probably be a headache . I wanted to keep the car on a budget and enjoy it for now, unfortunately the bottom end needed freshening before I expected it to. So these heads will have to do for now. The combo ran pretty good so I am just going to leave it as it.

Meanwhile I will be working on a new combo, hopefully in the 500 HP or more mark.. this car deserves it!