shaving the block/heads to up compression

[Superdave]

I wouldn't deck the block at all, or the heads.. there has got to be a longer rod out there that will work.. if not then try for custom.

I'd just bite the bullet and stick the 3400 crank in there.. the added displacement will equal more power in the end

[bjornmk1]

sbc rods are 5.7 or 6.0
I won't touch rodlength cause it's length is already near optimum.
my pistons are 3.45 mm in the bore,
that's about .135" in the bore measured from the deck.

I want to do it like this cause I have a fresh regrind crank in.10/.10
and the matching bearings from clevite laying around.

[ForcedFirebird]

I won't touch rodlength cause it's length is already near optimum.

Not that optimal if you have over .050" quench. You are creating a lot of work, just to use the 5.7" rods you have. You can get 6" rods. I know for old 383 builds guys would use Ford 302 rods. Have you looked into other options for them?

[Superdave]

there are a ton of different rods avaliable.. I forget all the ones i found now but there are some 5.9" out there with nearly the correct size journals for your crank.

[sharkey]

problem with a 6.0" rid is thats .300" longer, and we are only trying ot take up .135". a 5.8" rod would work if you could find one.

i still maintain going to a custom forged piston

[bjornmk1]

no,I haven't checked other rod options
quench would be very close to .050
at a CR of 8.6:1

[bjornmk1]

6 inch rods would have the pistons sticking
out of the block for .15 or so.
so that's not an option either.

it's a choice between shaving the parts and destroke it
or put a 3.1-3400 crank in it.

[IsaacHayes]

As much as I'd like to see a de-stroked quick revving 3x00, I think it'd be easier just to go with the 3.1/3400 crank and enjoy the extra displacement for the work involved. The 282 can't shift well at high RPMs anyways, so I'm not sure how much benefit a quick revver would get you over the displacement..

[ForcedFirebird]

6 inch rods would have the pistons sticking
out of the block for .15 or so.
so that's not an option either.

it's a choice between shaving the parts and destroke it
or put a 3.1-3400 crank in it.

Well, stock 3400 crank and pistons will protrude .020. In combination, you gat the perfect .040" quench.

[bjornmk1]

CR would be like 9-9.5:1 then.
thats a tad to high for 12-15psi boost.

and the destroked block would have the limiter set to 6800 or 6600 or so.
that's not really high.

most cars/engines here in europe have a 6500rpm redline std.

I'm not sure jet but the thing is I bought that 2.8 crank recently of ebay.
and finding a 3.1 crank is not easy over here.
plus I would have a hard time selling that 2.8 crank.

and last but not least...I am looking for 230-260hp max.

I'll keep thinking it over and over..and over

[ForcedFirebird]

CR would be like 9-9.5:1 then.
thats a tad to high for 12-15psi boost.

and the destroked block would have the limiter set to 6800 or 6600 or so.
that's not really high.

most cars/engines here in europe have a 6500rpm redline std.

I'm not sure jet but the thing is I bought that 2.8 crank recently of ebay.
and finding a 3.1 crank is not easy over here.
plus I would have a hard time selling that 2.8 crank.

and last but not least...I am looking for 230-260hp max.

I'll keep thinking it over and over..and over

Take a little more out of the combustion chambers.

Is it justifiable to do all that extra work, just to use a crank that was a good deal? Your crank was too tore up to remanufacture or grind?

[bjornmk1]

No..worse,I just sold that crank cause
I would use the 2.8 crank and ford cosworth piston.

but it so happens that I bought the new forged pistons for only 100$
on ebay.

selling the 2.8 crank would not be easy here in europe,
neither would buying a 3.1 crank be for that matter.

I just took a look at the intake when fitted without all
gaskets incl the heads.

it looks like al it would take is shave the lower horizontal part of the intake.

[bjornmk1]

FYI a good 3.1 (regrind)crank with bearings would
set me back about 380$...

so...I thinking towards using the regrind 2.8 crank(that was 160$ plus177$ for shipping).