OST-035: Silver Blaze

[oldeskewltoy]

My client dropped off his 20V silvertop for a bit of massaging



Mix in Toda springs, and Tomei Poncams, and stir to 7800 rpm.... for now....



More to come....

[oldeskewltoy]

Although the head looks pretty clean, and it is(was), the exhaust ports are still moderately heavy with carbon, so for that reason, and I want to make sure the head is capable, I've sent it out to get cleaned and pressure checked. I'm also having it checked for flatness.



A bit more about this build.....

My client will be using Toda AE101 pistons



they carry a 4.6cc dome, static compression will be around 12 to 1 while using a .8mm head gasket - as per Toda. He will also be running Toda's AE101 valve springs - good to 11 mm of lift




He will be using 20V Poncams



more to come....

[oldeskewltoy]

from another forum Wrote:Thanks for the cam card.

(responding to "having it checked for flatness") - Feeling sorry or tossing them a bone for goodwill?

How about a hardness test, the Toymods guys just love that BS. :smile:

client wants a bare minimum cut - .001", maybe .002" if required. the flatter the surface the lower the cut......

I've heard of testing the 7M heads... I've not heard of people checking the 4A heads....


Had to order some new equipment.... my 16V spring remover/installer doesn't fit the pockets the 20V springs fit into... so....

oldeskewltoy Wrote:Had to order some new equipment....

actually quite a bit more.....

For the past 5 years I've used mostly Dremel motors(5), and flex shafts (4). I also was using a Black and Decker RTX (about 60% more amperage/torque) than the Dremel. I've used the RTX almost exclusively for that past 18 months, enjoying the torque advantage it offered.

Well, in the middle of OST-034 the RTX began to die. So it was finally time to really upgrade.....



I've purchased the 1/6 hp Foredom SRX, along with 2 handpieces, the larger of which you see in the above photo. For now I'm keeping the Dremel for finish work since it does still have a higher maximum rpm - useful in getting that nice finish.




More to come.....

[Bean]

there's no proper translation to what I'd like to say so I'll leave a simple congratulations to the new tools may they last forever

[oldeskewltoy]

(10-01-2015 06:58 AM)Bean Bandit Wrote:  there's no proper translation to what I'd like to say so I'll leave a simple congratulations to the new tools may they last forever

over $500 deep... not sure forever... but they better outlast my Dremels....

from another forum Wrote:That's a nice looking head!

It will only get better looking........

Well... that took a week??? to get this thing cleaned, and pressure checked.... I'm guessing they were busy????


ANYWAY..... the head checks out, and it is flat! this means a cut of .002" or less will provide the mating surface for a good metal gasket seal.


This head will be getting half a valve job.... yep, half a valve job!



The intake seats, already with 3 angles, will get a very fine (400 grit) lap in, while the exhausts will get a full on 3 angle.


and I've begun the port work.... the intake side is all new, like OST-034 was. Buuut... unlike OST-034, there is a fair amount of port to bowl transition blending required. As to how much.... I'm following OST's first rule of porting... do no harm, so could I take more.... maybe.....




now as far as the exhaust goes....

but the exhaust I've got well in hand....

Here is a view down(up?) the bowls to the roof... notice the ledge(angry eyebrows)...???



Anger removed... and all without Botox....


and a view at the short radius, and the transition to the port from the bowls






more to come.....

[oldeskewltoy]

Silvertop chamber volume.........




more to come......

[Bean]

Nice work, love the angry eyebrows picture

[oldeskewltoy]

(10-07-2015 09:53 PM)Bean Bandit Wrote:  Nice work, love the angry eyebrows picture

oldeskewltoy Wrote:A bit more about this build.....

My client will be using Toda AE101 pistons



they carry a 4.6cc dome, static compression will be around 12 to 1 while using a .8mm head gasket - as per Toda.

oldeskewltoy Wrote:Silvertop chamber volume.........

My math comes out to a few hundredths of a point different then Toda's, but for sake of chamber volume confirmation... 36cc seems to be the Silvertop's chamber volume

[oldeskewltoy]

oldeskewltoy Wrote:Anger removed... and all without Botox....

anger removal from a different perspective....




more to come......

[banpei]

Removal of anger means obviously more happiness!