cheech

Seen this awhile ago then just recently in their Nov./Dec. print edition again.
Didn't read much into it until seen it in the print.
702CI

Anyone familiar with this builder?
Does this make anyone else scratch their heads?

It's clearly on a Gen VII block as he's using Raylar heads.
To get 702CI with a 5" stroke it would need a 4.727" bore in a 4.840" bore space block.
6.7" rods with 10.2" deck, so that's a 1" compression height piston.
Says he wanted to shed some weight from the reciprocating assembly over a blown 632.
Most of those are 4.75" stroke.
Obviously could of used aluminum rods and lighter pistons and whatnot over the 632.
No blower he gets rid of the load of driving it and the inertia of all the drive components.

But typically doesn't increasing stroke go the other way?
Increase reciprocating weight

Those heads enough?

Time bomb or not?

ttuton

Seems to me that a more efficient head with bigger valves and a smaller cam would be more reliable. I can’t imagine a .825 lift cam not wreaking havoc on the valve train.

hogie roll

I agree with both of above statements.

There is some bad math in there on the CI or bore.

Huge lift, tiny exhaust valve, weird intake manifold.

cheech

That's my thought also. They didn't spec the bore in the article. On purpose? I dunno.
I think a lot of these builds and the corresponding write up are self submitted so that's that.

Funny about the .825 lift also because these are 2 quotes out of the article.

RSCHAP1

Different than what used to seeing.
And in these days of HUGE HP, even the 1,000 estimate doesn't seem earthshaking with that many cubes.
But, just my .02 which after inflation now is only .004

hogie roll

Id guess it’s a 665, 4.6x5.0.

5” stroke fits, I’ve heard the pistons start coming out bottom of the bore at 4.75. Maybe these blocks have longer bores than Big Ms?

SB

iTrader: (1)

All that work, dual plane on a 700cid experiment, and no dyno. Seems odd.

compedgemarine

why do you need a dyno? just take the base motor and the ad's say the headers are good for 150hp, the intake adds 50hp, etc. add it all up and you have a 700hp 327 sbc. dynos are just an added expense. throw in a 3/4 cam and you may make 750hp.

and yes I am kidding

hogie roll

That intake looks cool but I’m extremely suspect after seeing Dyno results from all of the old school cross over type manifolds like that.

SB

iTrader: (1)

Those two long runners that bend pretty sharp at head entrance. Looks like a hunk of schit me but who knows till you hit the dyno with correct data equipment.