Genesis Iron Block Owners. Please Check In.

[FUNFER2]

Originally Posted by Gunner

These huge-bore variations make me think of the old crack about motorcycle engines: "Bore it out one more time and you'll have a stack of washers!"

lol

What bore size would turn your crank, with your next engine,...482 ?

[RodKnock]

First, I would check with the engine builders on this site about boring the Genesis block to 527. I haven't heard of a member here boring that big with a Genesis or Pond block. The only block that I've heard going that big is the big bore Shelby block.

Second, the Pond aluminum block will save you about 125 lbs over an OEM FE. The Shelby block will save you about 100 lbs over an OEM FE block. I believe I'm reasonably close on those figures, but double check me.

Third, while Barry R loves to use the Genesis block, from what I've read, many others have run into problems with them. On the other hand, "xl8or", Scott, used the Genesis block and seemed to have no problems at all.

Fourth, the Genesis block is about $1,000 less than the Pond block and about $1,600 less than the CSX block. So, upgrading to aluminum is not cheap, but then removing 100-125 +/- pounds and increasing the resale value of the car are two advantages of the aluminum block.

Fifth, an aluminum block makes it easier to spot leaks.

[silverline]

There is no need to bore a new block to the maximum. More than 4.31 can´t be done with an genesis or pond aluminum block I think.

With an aluminum block > go with 482 CUI (or 468 CUI if you prefer the shorter 4.125 stroke like me).

With an iron block > same as aluminum or 496 CUI (4.31 bore / 4.25 stroke).

Greetings from germany, Stefan

[FUNFER2]

I think,.... the 527 is the maximum they can be bored to I know the Shelby has much more meat but, the price is incredible. Also, like with any engine, the more troubles you can encounter with very large bores.

The walls are much thinner.
If you hurt a cylinder, the block is done.
If a rebuild is needed, sleeves are needed.
Increased heat.
Of course, it's more expensive.
ect....

I guess I'll have to sell the shirt off my back, to pay for a Pond or Shelby aluminum block.

I do have many sponsors for this magazine build but, the block is hard to swallow and takes up a lot of my budget.


Anyway, since I'm back from the dark side, with the ALUMINUM block. Talk to me about the parts used and the specifications or your motor.

Is there anything you would change ?

Why do you like yours so much ?

[767Jockey]

Kevin,
Just in case you haven't been told, you can NOT bore the Genesis aluminum block anywhere near as much as you can their cast iron block. It's much more limited in bore capacity.

[silverline]

Originally Posted by FUNFER2

Anyway, since I'm back from the dark side, with the ALUMINUM block. Talk to me about the parts used and the specifications or your motor.

Is there anything you would change ?

Why do you like yours so much ?

My Keith Craft 468FE is right now in progress:

Pond iron block w/ 4.25 bore
KCR 4340 forged crank w/ 4.125 stroke
KCR 4340 H-Beam rods w/ ARP2000 upgrade
Ebrock Stage-2 heads
Ebrock performer RPM intake
Comp cams solid flat tappet cam
Erson roller rockers
QFT 750 cfm mech. sec. carb without choke
Billet double roller timing set
Cometic gaskets

That 14 CUI more with 4.25 stroke would not make a big difference in HP/TQ, enough is enough. And I like the better rod/stroke ratio @ 4.125 stroke and lower piston speed. The ARP2000 upgrade rather isn´t necessary, but safe is safe and the cost not much more.

[dlampe]

I am building the same thing. My builder didn't want to build a square moter so we are using the 4.125 crank. The angles are better and if anything, it should ramp up a little faster.

[RodKnock]

Originally Posted by dlampe

I am building the same thing. My builder didn't want to build a square moter so we are using the 4.125 crank. The angles are better and if anything, it should ramp up a little faster.

I was told the 4.25 stroke and 4.25 bore was the way to go, but every builder is different. Some build 496's or Roush offers a 511 FE. Some build the 527.

For someone like Dean who's an accomplished racer the .125 stroke difference may make a difference in "ramping up", but so does using an aluminum flywheel or even starting with few hundred extra lbs that a fiberglass car has versus an aluminum one.

I'm not sure a mere mortal like me would see that .125 stroke difference. Sort of six of one, half-dozen of another.

Enough is enough? Hmmmm. Never been part of human nature.

[silverline]

Originally Posted by RodKnock

Enough is enough? Hmmmm. Never been part of human nature.

As with alcohol.

Driving a cobra with excessive HP / low-end TQ isn´t funny. If you´re realistic, a well made 468 cubic-incher is enough for a light car. Why go the 482 route than (or even more) and not take the shorter stroke advantages? There´s nothing wrong with 482 in a cuiser, but no chance in my cobra!