Egge pistons and Offy heads on a flathead???

I'm using Egge pistons for the first time and I've run into a problem. I have Offy .400 38-48 heads (new) and the pistons are hitting the heads. Has anyone else run into this problem?

I bolted on a set of Offy .425 heads (new also) and they just barely clear. I also tried a set of new Edelbrocks and they are just fine. I noticed that the dome in the Offy heads matches a stock Ford piston where as the Edelbrock heads seem to have the same dome as the Egge pistons which is not like a stock piston.

For years I've been using ROSS pistons and never a problem, but in an effort to save some guys money on rebuilds I've been asked to use Egge stuff. I'm starting to wonder now if that's a good idea, or is there some info out there that I'm not aware of?

Matt

 

yep your right egge and offy dont mix. i had the piston domes cut about 030 at the center taper to 0 at the edge. done this several times and its worked out well. lotsa meat in the piston crowns so no worries there and much easier than trying to get the heads reworked....

 

I have Egge pistion and Offy heads @ home.
I can measure tonight if it's the same problem there.
I can also verify Sharp heads.

Michael

 

Egge is a nice guy but you have to check everything ALL THE TIME.

Perhaps more often than other suppliers sorry to say.

 

Hi,
i compared egge and stock pistons to offy,sharp and stock heads.
The dome on egge is different than the rest.
I would say you can take easy 040-060 inch of the dome to get the shape.
But then you lose compression and have to machine the heads.

I will have Ross pistons next week to compare.
Michael

 

Egge pistons........ your not saving the guy money if you spend the time to check them

Sometimes there are flat spots in the cam grind of them.... it happens

 

Are these the pistons whose heads are a sort of shallow cone rather than a dome??

 

Running Egge pistons with Offy 400 but on an 8BA and no problems, set the heads on without a head gasket, rotated a couple of times and no hitting, with 4" crank.

Vergil

 

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Maybe Egge is cheaper on the this engine, but I got a quote from them for valves, a few pistons, rings and a head gasket for my 1926 Continental Motors engine, and it was through the roof!! I'm glad someone _can_ provide the parts...but, you'd have thought I was restoring a Bugatti Royale... I'm now having to resort to bugging old-time tractor supply shops, in the hopes that I'll someday stumble upon matching tractor pistons, rings, and valves... But, the fun's in the hunt.

 

What is the domb hight of the Egge pistons ?

 

I'll measure the dome later today. It's for sure the dome type and not the shallow cone Bruce had mentioned. The Edelbrocks fit perfect but he wants the Offy stuff because he wants it to match his intake (I know, don't say it LOL)

Matt

 

Matchin' stuff syndrome??????????

That's not traditional unless you were the son of a Paramount Milk Farmer

 

I wonder if they would fit my Kugel Rocket Heads

 

Sell them to me and i will find out for you ))

 

Used Egge pistons on a banger rebuild. Spent alot of money on the machining end only to have a knock when the engine was started.

Was running a new Antique Automotive repop Winfeild head and took the botom end apart=no problem there, The sound traveled to the lower crankcase, I decided to pull the head.Egge pistons were sticking out of the cylinder bores by about .025 there was an indentation on the head from the piston hitting the head.

Rather than go back and take it apart the owner opted to just use the stock relieved B head and was just tickled that it didn't make noise.
I always felt that it should have come apart again so that we could size the rods, Mic the pistons & check the piston pin location in relation the height.

Talked to others,I guess this is a problem when using them.
Just check em before you install em.

 

ive used them many times on stock rebuilds and they are adequite for the job .on par with egge, they are much heavier than oem ford, not weight matched and watch for curls of metal inside where the oil rings grooves are cut

 

my buddy in fresno just had the very same problem with his new 32. he just cutt the heads some and problem fixed.

egge pistons--offy heads--isky 400 jr

 

I don't know John....

Why don't you bring them over and if they work I'll trade you straight up for the Offys!!! LOL

Matt

 

You wouldn't want them they are chrome plated on the outside and heavy iron still need a set of grancor before letting them go.... What makes the Offy heads not fit and the other do? were does it hit on the head? clay it?

 

They are obviously underappreciated and since you misspelled their name, I think your penance should be sending them to me in trade for some Offys!

 

Like I said check the skirt's cam grind

Even if you get the dome right they can still slap pretty good