I am soon having my dubble humps decked. This is to achieve better sqish. What is the best way to protect the open cylinders. Anyone have a better idea than throwing a towel over the cylinders? The car will be left outside. No garage.
espo1980
Having the heads decked will not improve quench, it will only slightly help compression depending on the head gasket used. All I ever did to protect cylinders was coat them in WD40 and cover them up recoating often.
If you have the heads decked it won`t help much in compression to be of any benefit to power gains. The factory gasket was .028 in thickness, most after market gaskets are .041 in thickness to make up for uneveness in the decks so a aftermarket gasket will make compression lower and less quench than the factory gaskets would. Since you didn`t give a full explanation of what your goals are, I wouldn`t pull the heads until you give us more details of what you plan to achieve.
If you have the heads decked it won`t help much in compression to be of any benefit to power gains. The factory gasket was .028 in thickness, most after market gaskets are .041 in thickness to make up for uneveness in the decks so a aftermarket gasket will make compression lower and less quench than the factory gaskets would. Since you didn`t give a full explanation of what your goals are, I wouldn`t pull the heads until you give us more details of what you plan to achieve.
283 engine
The motor was built by me three years ago. I am just now learning what I did wrong with the build. The engine has poor low end. wrong cam is the problem. I want to find a smaller head gasket and deck the heads to achieve a 9.5 ratio. Also....I did not have any idea when putting the motor together about compression ratio or static ratio. So I would like to check the piston hight and volume. While the heads are off.
The motor was built by me three years ago. I am just now learning what I did wrong with the build. The engine has poor low end. wrong cam is the problem. I want to find a smaller head gasket and deck the heads to achieve a 9.5 ratio. Also....I did not have any idea when putting the motor together about compression ratio or static ratio. So I would like to check the piston hight and volume. While the heads are off.
It seems you have learned some since the first go around. Then I would suggest you learn more by reading more. First off, I wouldn`t have built a 283 other than for a economy engine. Secondly, you have to learn to make the package work together as a team for performance. Decking the heads isn`t going to help any nor be worth it in the end, you would have to have the block decked which will mean a entire tear down. You can learn how far the piston is down in the bore at TDC by doing so with a caliper. Since SBC`s were not casted with much percision at the factory you can bet the decks are tipped and even if they are right it`s supposed to be .025 in the hole.
Depending if the pistons are "destroked" it can be all the way to .050
in the hole at TDC.
Depending if the pistons are "destroked" it can be all the way to .050
in the hole at TDC.
While I had my prior engine apart I tried the WD-40 route, and it tended to rundown the cylinderwalls too easily, (I had to have it apart for an extended time), so I ended up using a fresh stiffbristle paintbrush with CLEAN/FRESH heavy grease, as it clung well to the borewalls. Won't harm anything, and will "hang in there well". -Just my .02
I do however advise, that you listen to the other points being made here, as they are well knowledgeable in the subject. -Jim
I do however advise, that you listen to the other points being made here, as they are well knowledgeable in the subject. -Jim
Do like DoubleV said and do some serious READING. Tons of great information in the knowledgebase of this site. Keeps me entertained for such long periods of time that my wife's practically got to pry me off the computer. Also; look for mention of books such as "HotRodding the Chevrolet V8", and others like it. Your local library may have some of the more popular ones. I loaned a similar book to the counterman in our local parts store about a month ago,(whom is building 2 engines right now, and had just finished a 355) and after the first 2 weeks I asked if he were done, and he politely asked if he can keep it awhile longer because it's been such a good read! (He's also a volunteer firefighter and has a pretty full plate, so of course I said yes...) My point being, spend as much time as needed reading the various articles and threadposts on this site, and you'll get lots of VERY USEFUL information, and TIME well spent is equal to $ well spent. -Happy reading!! :thumbup:
-Jim
-Jim
The heads are not 302 heads because no 302 ever used 1.94 camel hump heads. The were used 327cid/ 300hp from 1962 - 1967
Years ago I did a 327 with the 461 heads,Put some 202"s and did some head work,comp cam #12-224-4, with good intake,carb,ign,gears and converter,Put it in a 66 chevelle and it would run 12 o's all day long, and on a good day high 11.90's.there is always a way to make more power,but the combo will run pretty good.
If they're only going to be off for a few days, just dip your fingers in some clean motor oil and wipe the bores with them. Turn the engine over a couple of times and do it again. Do the deck surfaces also, but clean it off before you put the heads back on. Cover it with a couple of large plastic trash bags, tied so if it rains, the water won't drain inside.
Real heavy "contractor" trash bags are large enough and thick enough to not be easily punctured by the occasional metal edge. They are not, however, cat-proof, so if you have such critters around, a protective layer of old carpet or corrugated cardboard might be in order.
Real heavy "contractor" trash bags are large enough and thick enough to not be easily punctured by the occasional metal edge. They are not, however, cat-proof, so if you have such critters around, a protective layer of old carpet or corrugated cardboard might be in order.
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