ADA head the best?

[meatball]

I've always kinda read that ADA heads were the best. If so what makes them better then other like pro-tec and Riva? Isn't high compression the same no matter what? (and dome shape)

 

[waxhead]

Personally i prefer riva

the riva has cooling control built in to it
the ada doesnt
if you look at a stock yammie you will see the water comes up through the exhaust and then across the cylinder and out the induction side
by way of holes in the head gasket
the riva does the same

however the ada doesnt have this control and i think you would be more likely to get hot spots in the cylinder
Thats my own personal op

 

[Legdrag's]

You will see there's smaller holes for the exhaust side of the Greater head and bigger holes on the intake side.

 

[kid4now]

ADA domes are a lot thicker and wont crack. Protec , riva, greater, heads have thinnner domes the tend to crack in the dome area and cause the same symptoms as a blown o-ring or head gasket. I run them both ADA on one ski and a Protec on the other. I have gone through 3 or 4 protec domes from cracks.

 

[njfl]

I personally prefer ADA, and will continue to run ADA as they look clean and simple and so far, I'm impressed with their performance on my motors and the one's that I've ridden. In fact I have a nice Riva setup that I will be selling soon.

On the Riva that I have I did notice that the top side of the domes (the part concealed in the shell) have a laminated structure which would seem to conduct heat away better as the water passes by.

Legdrag's, what does the smaller exhaust side holes provide (on the Greater head)?

 

[Ollie Rastabean]

the edges of my greater domes along the combustion chamber were pretty banged up after i blew my motor. they chipped away pretty badly.

thats the only negative thing i can say about my greater head so far.

one question tho, do the new ada domes have a notch or cutout to keep the domes from spinning like the greaters do? i used to hate that about my old ada.

i still like ADA though, that is also my preference. although now i'm curious about the water xfr issues brought up.

i also like the base studs on the girdle kit of my greater head.

the anti-rotate locks are easy to put in. bring the head + domes to sebby and i can take care of it.

-O

 

[waxhead]

I have not fond an issue with the riva domes cracking at all
and i resessed some about 3mm for a stroker engine as well
I know the r&d is known for cracking domes
but i never heard of the riva doing it

 

[FLY6584]

I thought that one of the major drawbacks with the Riva Head was that the domes had to be pressed in and couldn't be easily changed out like the ADA.

 

[demolition_x]

whats the cost of the ada versus the riva?

doesn't the full ada kit cost like 370?

whats the riva cost?

 

[FLY6584]

I thought that one of the major drawbacks with the Riva Head was that the domes had to be pressed in and couldn't be easily changed out like the ADA.

Nevermind. I just checked the Riva site and they are interchangable. Does anyone know if the older Riva heads had domes that needed to be pressed in. I know I've heard that somewhere.

 

[Matt_E]

whats the cost of the ada versus the riva?

doesn't the full ada kit cost like 370?

whats the riva cost?

I understand the ADA kit can be had for as little as 325 shipped.

 

[demolition_x]

really? where from

i wanna pick up a kit.

 

[Matt_E]

Call Jetworks.

 

[waxhead]

The ada is cheaper as it is only a one piece head
this is what makes it impossible for them to get the cooling routing in it like riva

I like to control my cooling
to cold and its a siezeing issue as well
other people have had good sucess with ada
I just find there is power to be had playing with your cooling the ada doesnt allow me the same luxury

 

[sjetrider]

I have gone through 3 or 4 protec domes from cracks.

I run a Speedwerx wich uses same domes as Protec and never cracked one w/ 86mm flat tops 210 compression. The Speedwerx / Protec domes in theory will run cooler than ADA because of the cooling ridges in them. Riva heads are nice accept they run about 1000 "O" rings I think. A one piece shell design would be nice just for convenience.
Good point though WAX, never looked at the Riva close enough to see that I guess.

 

[Big Kahuna]

if you need to control your cooling, just use restrictors on the out going lines...............

Riva will cost you close to $500.00 if I am not mistaken..........

 

[waxhead]

the riva does run alot of oring
i have never had any issues with them blowing o-rings

I guess its more of a personal thing
The Riva was designed by Tim Judge so i know its had a lot of developemnt in it
I like the cooling benefit

Other people like the leaser o-rings in the ada

 

[waxhead]

if you need to control your cooling, just use restrictors on the out going lines...............

Riva will cost you close to $500.00 if I am not mistaken..........

using restrictors on the out going lines will not allow you to cross cool your cylinder like yamaha designed

 

[Matt_E]

I see your point...but is there any real evidence pointing to engine failures because of this?

 

[demolition_x]

yea the riva set up is around 460 from their site. so a little bit more money.

im also curious if theres any proof to this engine failure