cubic inch vs. "the budget"

IDT-572 wrote:

bruno wrote:

IDT-572 wrote:Your existing pistons, rods, and deck height, make up what your stroke will be. IF you change one something else will be effected.

cool .....


so which combo will accelerate faster ? n/a

4.50 x 4.560

4.60 x 4.560

4.60 x 4.60

I don't think the extra 13 cubic inch is worth the trouble and cost of putting in the 4.6 crank.

I also think your 4340 RPM crank is as good as any other 4340 crank, other than maybe a Bryant.

As far as accelerating, I don't feel with all else being equal on top of the engine you will see any difference.

You just don't want to get the port velocity to high in the port going to a big cubic inch and small heads.

My 580 inch P-51 deal has port velocity about equal to my 557 TFS Street engine.

Getting the port velocity high, but not too high is the way to a good and powerful engine with a broad torque curve N.A. The port velocity will be high on your Eddy's at 580 + inch and spraying will make them a cork.

With you spraying (Mr Frosty) I think you would be better served to step up to the A heads and a 598 inch, 4.6 x 4.5 And take advantage of the added torque and HP the A heads afford.

Everybody took notice of the hp my P-51's made saying it made A head hp, but nobody notice it was a good 110 ft lb down on torque to Boo Boo's 598 at almost the same RPM. This tells me the A heads raised port aids in cylinder filling even over the P-51's.

You build a good Lem built 598 and stuff a 300 shot through it, I doubt you will make a full throttle pass in two years.

JMHO

bruno wrote:Lem is there no there no other stroke we can do with these existing rods and pistons ?

richter69 wrote:tune up the fogger and go race what you have now Nick..........I venture it'll go a good bit faster than what it has. I'd bet the heads will lift long before you blow the crank out of it.

138 wrote:Anyway just how fast do you wanna go...and on what tire?

dfree383 wrote:

bruno wrote:Lem is there no there no other stroke we can do with these existing rods and pistons ?

Your splitting hairs....... Getting lost in Theory and trying to build a bigger motor when you haven't even used what you have now to its potential.

On the Chinese Crank, Typicaly its the machine and detail work that seperates the good ones from the bad ones..... Not the Forging, Now granted the 4340 chinese metal is less consistant the typlcal Ameican metal, but its still decent and reasonable for the price.

IMO Freshen the bottom end....... Check everything out and if something needs replaced, then upgrade. Have lem update the valvetrain.... and start using the fogger and all the NO2...... When your getting every last ounce out of it and need to go faster them think about another engine.

My whole point is you haven't even used what you have to its potential yet and still have alot of work on the chassis and balance of the drivelie to get everything perfect

KY JELLY wrote:Its gonna take close to 1200 hp to run 5.20's in that car

IDT-572 wrote:If you are truly going to stay on 10.5's the light weight of the Eddies and intake will be of some help, but I doubt that it would overcome the extra power of a A headed combo would bring to the table.

After reading what you posted, I think your goals are obtainable, but the problem running those times won't be a lack of hp problem but a chassis problem.

I don't remember what your best 60 ft's are but they need to be at or below 1.25's.

What does your engine rpm peak at through the 1/4 mile.

richter69 wrote:If it were me, I'd gather a set of A460 heads, 4.5 crank, Oliver rods, cam, Intake, etc, etc and stick it under the bed..................tune up the fogger and go race what you have now Nick..........I venture it'll go a good bit faster than what it has. I'd bet the heads will lift long before you blow the crank out of it.

bruno wrote:

KY JELLY wrote:Its gonna take close to 1200 hp to run 5.20's in that car

lets say the 588" does 875hp na then add 300 in the plate and 300 in the fogger should get me there

Lem Evans wrote:

bruno wrote:

KY JELLY wrote:Its gonna take close to 1200 hp to run 5.20's in that car

lets say the 588" does 875hp na then add 300 in the plate and 300 in the fogger should get me there

I.m.o. the "588" with a 'mafia' intake, more comp. ratio, and more cam with exceed 875 hp.
If the budget is tight...just check the bearings & springs + add the better manifold & cam and spray away..

dfree383 wrote:That would make him a bigger target..........

56Tbird wrote:I heard word that he's looking at a lawn dart.................just say'n

138 wrote:Or is a "lawn dart" some kinda tractor...