Technical Let's talk 283s again...

Yeah I know that one. Bought the 265/283 book of HR magazine articles a while back. There's another HUGE 283 modification article that does a stroker crank AND huge overbore, where they cut the bores completely away and weld in new cylinders!

ratrodder's 400 started life as a Gaerte built WOO engine. Rodec 350+ block, but it had too many heat cycles and the head studs wouldn't stay put! The heads have ports and valves that could feed a potent 454. Solid roller, chosen for the last rebuild for use in a hillclimb special. We were shooting to detune it a bit, and get more 4000 to 6500 rpm range and give up the 8000 max of before.

As a final note it's now using a factory block that ratrodder has had machined for all of the good parts. I did keep the front drive set-up however. Gear drive for the cam, dry sump system, crank driven water pump, and a place to run the Hilborn pump.

Never know what I may do with that...

 

Yeah when I got that issue of harm(1959 iirc) I had no idea anyone was punching them out that far at all. And the mention that 350 strokers were already commonplace threw me off too lol

 

You're right that it is just sitting around... Still needs some additional assembly, too. I have no idea where my rod bolt stretch gauge is packed, either. You say the word and I can get a long-term loan set up for you, great terms too! You'll have to get that front suspension back together first, though.

I'm guessing that if you can keep your foot out of it for the first 30 feet or so, the T5 will last for a little while...but you probably know that better than I do.

 

That's why I also have a T10 in the garage. It might last a little bit longer...

 

Here's one for fun..

 

That's one nice sounding small block! Going in a Tri-5 by chance?

 

Sounds like the engines had heat exchangers. They're probably worth more than the engines. The ones I had on my twin 283 powered Chris Craft were all brass and heavy. The boat came from Long Island, NY. When I rebuilt the engines, the inside of the water passages was squeaky clean.

 

Well there is a Tri-5 in the background but I don't really know. I just read through your thread and remembered seeing that video. I really don't like looks of the 6V stacked on the tunnel ram and the drive hanging way out there like that, but it sure rev's quick with the 3.00" stroke and 12% overdrive. Gotta love those short stroke SBC's.

 

302 Bitches..... nice

 

You know, if that crank is just taking up space in your garage, you could send it to me. I'll find a good home for it!

 

Update: I now have 4 small flange 2G Rochesters, a spare top, a conversion kit for the carburetors and an Edelbrock 3 deuce intake manifold. Oh, and an ultrasonic cleaner to get the carburetors cleaned up. That's an over the winter project. I don't remember if I wrote about 1975-76 262 V-8 heads previously, so I'll mention it here.

According to Hot Rod magazine from when they were current, those teeny tiny little engines had heads based on the then current 350 heads but with changes to make them work on a small bore, small displacement engine.

The ports and overall castings were kept the same, however the combustion chamber and intake valves were reduced in size. The ports were still around 170 cc, the valves were 1.84 inch diameter, exhausts stayed at 1.5 inch diameter. Best of all, the castings were still the "heavy" castings. The combustion chamber was alleged to be 58 cc, but I'd guess that they were a bit larger.

Compared to the stock 283 heads however, these would be a good upgrade. I don't know if the early 305 had these heads. I'd like to get a set of these, if possible, to at least see if that information is accurate. Being a 2-year only option, and even if the 305s had the same heads, this might be a fool's errand. So if anyone has a 262 or early 305, mostly unmolested, and willing to dispose of it/them, let me know.

Thanks

 

The early 305s did not. It wasn't until the early '80s that the 305 heads with 1.84 inch intake valves and small chambers came along.

 

The 416 305 castings were out in '76-'77..... I have a couple of sets... 1.84" intakes with 1.50" exhaust valves.... And 57-58cc chambers.....

 

Care to share a pair? Good rhyming, don't you think...

 

From 1976-78, Chevrolet listed one intake valve for all 262s and 305s. It was 1 . 72 inches. The only difference in the other part numbers listed here are .0015, .003, and .005 oversize stems.

 

I'm gonna hang onto those till I get some things sorted out.... Sorry....

 

Looks like packman....

 

Thanks to ididntdoit1960 I now have a set of 1962 power pack heads for the 283. I've got a bit of effort to expend on them before they go to the engine shop, and some decisions to make regarding some modifications, but moving forward.

So here's some of the areas that need work: seat, guides, stud bosses, gasket surfaces refaced, of course start with degreasing and magnaflux. Port matching, and all of the usual steps. Those chambers look nice and small, so compression with flat top pistons should be able to get into the 9-9.5:1 range. Compatible with the ethanol free gasoline available around here. Induction will be 3-deuces and I'm thinking roller cam. Been investigating street solid rollers, as I don't mind the occasional setting the valves. There's some solid rollers available with bronze bushings instead of needle bearings. These should be more amenable to street use. I'm not too fond of needle bearings in an application that can have some intermittent oiling issues.

The only down side, can't use those staggered bolt pattern valve covers with the Chevrolet script on them. Guess I'll have to use the set of Corvette valve covers instead!

 

cal
Staggered bolt CalCustoms adapted to my 327.

Gary

 

Yes you can, there are nice adapters out there for staggered to straight.

 

I imagine that the adapter looks like a valve cover gasket made in aluminum with a countersunk hole for the straight across bolt on the staggered side, and a threaded hole for the staggered hole. I suppose if I decide to get another set of the aluminum Corvette heads I could use a similar adapter from center bolts to staggered bolt pattern valve covers.

You guys know that it's a sickness, right? Our need to keep collecting parts for the next project...

 

Those look like they go from staggered to straight across. The countersunk holes are the staggered pattern. But they look like what I imagined. Thanks for posting. Where was the listing? Any links?

 

Several companies make them for both applications. JEGS above.

 

This 283 was in the 1932 fordor I traded with Ron for my 1932 Tudor street rod, I honestly don't know anything about the engine but I do know that it ran like Jack the Bear! HRP

 

Thanks... Christmas presents coming soon!

 

Ooo-wee, I'll have more in the adapters than I currently have in the heads and valve covers I'm going to use!

 

Yeah.... why use staggered valve covers, since everyone makes both. Swapmeets have baskets of both. I bought adapters for faux 56 Jr Stock engine.. no other reason.