flat top 289 pistons

[Chicken Hawk]

You could but I don't think there is enough meat on the top of the 259 pistons to mill that much off and not blow holes in the tops. Also the 259 and 289 rods are the same.

Thanks for the constructive input Ted. ......so I could machine off the .135 from some 259 pistons and with 259 rods, standard deck height and 289 crank achieve around 10 to 1 compression?

[allstudedude]

Thanks for the constructive input Ted. ......so I could machine off the .135 from some 259 pistons and with 259 rods, standard deck height and 289 crank achieve around 10 to 1 compression?

[allstudedude]

31,000 miles and your engine needs rebuilding????
Tis' a curiosity, no?

No curiosity here..... I just want a shed load more power, 8.25 to 1 compression just doesn't cut it. If I just wanted to drive 'round on the street I'd repair the oil pressure relief valve, stuff a distributor in it and drive. I want to be able to run it down the strip from time to time and spank some Pord, Nopar and Chebby ass!!

[PackardV8]

I've had another thought on the subject of pistons....... has anyone tried using 259 (flat top) pistons and rods with a 289 crank?> obviously you would have to have the block decked by the 9.5mm required to retain the corect crown clearance.

Even if there is enough material in the decks, a batch of other parts would need "adjustment" too. For a start intake manifold faces ( and ports and bolt holes), pushrod length, ............

The pin height on a 259 piston is about .135" MORE that a 289 piston so the piston would stick out of the block approximately .100".

Not to mention all the above would cost many times more than a set of 289" pistons.

jack vines

[DEEPNHOCK]

31,000 miles and your engine needs rebuilding????
Tis' a curiosity, no?

[Chicken Hawk]

Using 259 pistons with a 289 crank would not work. The pin height on a 259 piston is about .135" MORE that a 289 piston so the piston would stick out of the block approximately .100".

Ted

Thanks Chris, I've had another thought on the subject of pistons....... has anyone tried using 259 (flat top) pistons and rods with a 289 crank?> obviously you would have to have the block decked by the 9.5mm required to retain the corect crown clearance. Is there enough meat at the top of the block to remove 9.5 mm without entering the water jackets?

Phil.

[Dan Timberlake]

Even if there is enough material in the decks, a batch of other parts would need "adjustment" too. For a start intake manifold faces ( and ports and bolt holes), pushrod length, ............

[allstudedude]

Thanks Chris, I've had another thought on the subject of pistons....... has anyone tried using 259 (flat top) pistons and rods with a 289 crank?> obviously you would have to have the block decked by the 9.5mm required to retain the corect crown clearance. Is there enough meat at the top of the block to remove 9.5 mm without entering the water jackets?

Phil.

[allstudedude]

Thanks for the link Mike, I've done some port matching to the inlet manifold when I fitted the edelbrock, the original port matching was a terrible job. I'll do a propper job of it when I get the motor out and stripped.

[stude dude]

Hi there, I think I can help. I would never pay $900 for pistons for any kind of car! I have some pistons for sale here in oz. Send me a private message chris@studeparts.com.au for prices and details.

Good luck with your project.

Chris.

[Mike Van Veghten]

Allstude -

There is nothing really "wrong" with the current Avanti header copy. At least not what I've seen or heard of.
The only thing wrong is there is some cast in walls, or baffles in the manifolds exit area that need removing with a mill or can be hand ground out, to make a nice clean exit.

As for dividing the center port...lotsa work for no gain..!
People have been trying for years on engines that have this type of port..all the work never seems to last...if new heads are installed for some reason...it's done without the work on the head or exhaust.
You can forget any benifits on the=is addition.

If you want a performance increase, find someone qualified to do some cylinder head porting and install hard exhaust seats.
If you really want to wake up the engine, have a set of, Avanti like, 1.875" intake valves put in (like the divided exhaust)...don't put the larger exhaust valve in, just the intake.

Go here to see what can be done.
http://public.fotki.com/-Mike-/
Look at "Stude Cylinder Head Porting".


Have fun.

Mike

[41 Frank]

Dizzy is Aussy for distributor.

[3x2stude]

I have a set for my Hawk not on yet. I can photo and send you an email tomorrow. The cast headers are a small but in my mind worthwhile improvement. They will require a bit of clean up inside, (smoothing), but its not hard. They also look cooler than the other cast iron. Is Tighe cams still in bussiness? Their web site says they make Stude cam blanks but they never answer an email. I have spent over two years looking for someone that has recentlt made tube headers for a Stude but have only found shops that are high end fabricators that of coarse can make them but would need the car there. One place I found that could probably make what ever you want without the car there is "Stainless Header Mfg. Inc." They have a neat way for you to mock up a model of the headers, send it to them and they fab to match. I supose the shipping would be cost prohibitive though. Still, check out there web site. And by the way, what is a "dizzy"?

Jon Kammer

[allstudedude]

Thanks Jon, us$350 is a lot better than the au$900 here!! The cam is a wade, made back in the early seventies for an Aussie Stude parts dealer, he had a bunch of them made. It's the last one he had and came with new micro polished lifters. I got the dizzy off the same bloke and it's like new, done very little work.
Have you had anything to do with the after market Avanti cast headers? if so are they any good?

[allstudedude]

Thanks Frank, it's a relief to know that the pistons are readily available, once I get the engine out, striped and measured up, I'll know what size i'm after....