RIO68

Need advice on raising compression ratio: Deck the block and/or use dome pistons? Trying to get to 10 to 1. Other side of the issue is using 882 heads or use different heads. Budget ltds the options...thks for any advice.

Crimson Thunder

The best budget option would be to find a set of c4 aluminum heads with 58cc chambers. I saw this mod on a late 70's Camaro. With just a head change(stock cam) it picked up a second in the quarter mile.

Kevova

882 is a 76cc head. 10 to 1 not happening without pop up pistons. Alot of choices in modern cast and aluminum heads with 62-68 cc.

Jebbysan

Heads, intake and cam.....along with a curved distributor.......
Compression is function of these changes but not a critical factor but always a bonus.
FYI......1 point of compression is worth about 15 horsepower and 15 ft/lbs. torque across the board....apples to apples. Do not get hung up on it.
I run a 10.5 to 1 engine because it complimented the large overlap on the cam and it sounds great.
The heads alone will give you 10 to 1......but everything else working in tandem will unleash big gains. You CAN work a stock 350 in a Vette to be quite a stomper with the right choice of parts.
Have fun.

Jebby

RIO68

If I have the block decked to "zero" with flat tops bored .040 and those 76 cc heads what could I expect? ….or stock deck and pop ups what then and how much dome can be run with those heads? Plan on running Melling 22232 cam shaft.
Intake 468, exhaust 480 lift, duration 231 @ 0.050 , lobe separation 110, intake 304 duration and exhaust 287....
Thks...

Kevova

You could run 11.0s or .100 , but finding a good pair of aftermarket cast iron should be under 500. Look in circle track used parts listing.

derekderek

882 are very good heads. You chain about 10 of them together and you have a very good sailboat mooring. Compression. 7 to 9 is worth about 4% a point. 9 on up worth about 2% a point.

stingr69

Spend money on some small chamber heads. Those 882s are without question the worst pieces under the hood. No flow, no compression. Even the lowest budget needs to include some kind of head replacement for 882s that will have smaller chambers for more compression.

Everything else depends on the heads you end up with and the power curve you are aiming for.

derekderek

If the ports didn't suck-barely-the chamber size would be less of an issue. Durable. Dont crack much. But neither do Briggs and Stratton...

Dynra Rockets

That's what I did. Not the best heads by far but cheap and the CR bump is a nice kick in the pants below 4000 rpm. Keep the engine recipe torquey instead of high reving and they will work fine.

derekderek

Wouldn't iron vortecs be better and easier to find?

RIO68

Vortex might be, never used any....don't want to change intake...thought heads would be easier to find. ....

Jebbysan

They are out there......I scored a pair of Dart 200cc Iron Eagles on E-Bay ironically from a Corvette shop for $500.....they needed nothing when they got to me but the I.D. locators that everyone leaves out......but they had approx 2000 miles on them......
Deals are out there.......start shopping!

Jebby