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Forum: Beginner Technical/Performance 04-03-2018, 11:27 PM
Replies: 18
Views: 1,412
Posted By KBA
In order not to disrespect the OP further, my...

In order not to disrespect the OP further, my post was irrelevant, my mistake and apologies. It was by no way meant to flame on anyone.

Ghost, you have a PM.
Forum: Beginner Technical/Performance 04-03-2018, 07:09 AM
Replies: 18
Views: 1,412
Posted By KBA
Red face Ghost, I always find it funny how people claim...

Ghost, I always find it funny how people claim DOHC is so much superior and only mention this specific property :D ... The funny fact is that DOHC lovers practically never adjust their cams at all. I...
Forum: Beginner Technical/Performance 04-03-2018, 05:36 AM
Replies: 18
Views: 1,412
Posted By KBA
Well actually, I would not be so sure. I have...

Well actually, I would not be so sure. I have messed around the F22A stock head in 3D CAD and the impression I have so far is that the cam is the reason why F22A is not that special stock. The head...
Forum: Beginner Technical/Performance 03-26-2018, 04:14 AM
Replies: 5
Views: 590
Posted By KBA
I know for a fact that WEB refer to their grinds...

I know for a fact that WEB refer to their grinds with a master grind number (three digits). I have worked with them in this regard and they should be able to provide you at least 6 different...
Forum: Beginner Technical/Performance 03-22-2018, 06:39 AM
Replies: 45
Views: 4,653
Posted By KBA
And so, based on the CFD input, I had the feeling...

And so, based on the CFD input, I had the feeling that port work might not even be necessary, simply because the PT3 is already so good from the factory. So I decided to simply install +2 mm valves,...
Forum: Beginner Technical/Performance 03-17-2018, 03:25 AM
Replies: 45
Views: 4,653
Posted By KBA
Thank you and you're welcome to everyone. Right...

Thank you and you're welcome to everyone.

Right now the head is at a local shop to remove the dead valve seats and guides. The process is slow and I have to keep calling them in order to make them...
Forum: Beginner Technical/Performance 02-09-2018, 06:16 AM
Replies: 45
Views: 4,653
Posted By KBA
Just finished a few more renderings to inspire my...

Just finished a few more renderings to inspire my self getting to fabrication.
Enjoy....
Forum: Beginner Technical/Performance 02-08-2018, 09:43 AM
Replies: 32
Views: 2,269
Posted By KBA
The moment you place a counterweight, the RPM...

The moment you place a counterweight, the RPM picks up significantly. I have noticed the opposite with dremel cutting discs. The moment it snaps in half where one half of the disc is still attached...
Forum: Beginner Technical/Performance 02-08-2018, 07:16 AM
Replies: 5
Views: 590
Posted By KBA
I would trust WEB more than bisi as they are the...

I would trust WEB more than bisi as they are the ones producing it. The numbers you see on it are most likely master grind numbers (no relation to actual specs). They are the ones handling the...
Forum: Beginner Technical/Performance 02-08-2018, 12:32 AM
Replies: 45
Views: 4,653
Posted By KBA
NolsAccord_CC1, Well, I am not sure really.. The...

NolsAccord_CC1,

Well, I am not sure really.. The laser cutting could cost about 20-30 Eur including material. The pipe bending could reach as much as 100-150 Eur including material as there are 4...
Forum: Beginner Technical/Performance 02-07-2018, 11:42 PM
Replies: 32
Views: 2,269
Posted By KBA
Well, the second order vibrations are the main...

Well, the second order vibrations are the main target for the balance shafts since they rotate at twice the engine speed. A four-pot crank is already balanced in the first order, but the second order...
Forum: Beginner Technical/Performance 02-07-2018, 09:19 AM
Replies: 32
Views: 2,269
Posted By KBA
Has anyone actually measured the power gained...

Has anyone actually measured the power gained from balance shaft delete?
I hear a lot of controversy on the net, in theory you free up some power because you are running less accessories, but on the...
Forum: Beginner Technical/Performance 02-07-2018, 06:23 AM
Replies: 45
Views: 4,653
Posted By KBA
Well that's just the thing... I too once thought...

Well that's just the thing... I too once thought that it is important to keep the exhaust header uniform to maximize the speed of a greater volume of gas. But the deal with exhaust is never that...
Forum: Beginner Technical/Performance 02-07-2018, 05:10 AM
Replies: 45
Views: 4,653
Posted By KBA
Just so you guys wouldn't think I'm dead :) -...

Just so you guys wouldn't think I'm dead :) - still working on the PT3. I have done several more CFD sims, and the final results are as follows:

Intake:

Stock (cleaned) port with 36 mm valves...
Forum: Beginner Technical/Performance 10-12-2017, 04:56 AM
Replies: 45
Views: 4,653
Posted By KBA
Aventari, knife edging always helps! Sure it's...

Aventari,

knife edging always helps! Sure it's not astronomical, but cleaning up the casting debris is a slight gain. None the less, it seems that these ports are already heaven from stock, just...
Forum: Beginner Technical/Performance 10-09-2017, 01:53 AM
Replies: 45
Views: 4,653
Posted By KBA
The calculations are finally done, and I am a bit...

The calculations are finally done, and I am a bit surprised. The flow rate went down the slope with the raised floor, shorter roof and 36 mm valves - 330 CFM. This leaves me curious about the port...
Forum: Beginner Technical/Performance 10-08-2017, 04:48 AM
Replies: 45
Views: 4,653
Posted By KBA
...and once again I have faced delays with this...

...and once again I have faced delays with this project. As it turns out, I went after a PhD in mechanical engineering and I will have to work on other projects in parallel. I will be developing a...
Forum: Beginner Technical/Performance 09-26-2017, 01:47 PM
Replies: 45
Views: 4,653
Posted By KBA
Jon, thanks! :) Bunta, the engine picture is...

Jon, thanks! :)

Bunta, the engine picture is just an overlay to give some idea about the proportions. I used H22A since I was able to find this detailed split on google and these engines are...
Forum: Beginner Technical/Performance 09-26-2017, 06:19 AM
Replies: 45
Views: 4,653
Posted By KBA
While I keep you all waiting for the progress of...

While I keep you all waiting for the progress of port mod CFD, I just thought this might seem interesting to some of you.
Since I am working in exhaust manufacturing company, I have to fill my free...
Forum: Beginner Technical/Performance 09-22-2017, 06:54 AM
Replies: 45
Views: 4,653
Posted By KBA
Thanks Rilas! :) Today I found this pic on...

Thanks Rilas! :)

Today I found this pic on google. It is said to show H22A in cross section. I found it interesting to introduce this image in CAD software and overlay with my scanned PT3 (F22A)...
Forum: Beginner Technical/Performance 09-21-2017, 02:11 PM
Replies: 45
Views: 4,653
Posted By KBA
I still have not finished the new port design or...

I still have not finished the new port design or run the sims, but it is in process. Just taking a lot more time to complete than I expected.
In the mean time I have something else to show you all. I...
Forum: Beginner Technical/Performance 09-21-2017, 04:28 AM
Replies: 202
Views: 44,109
Posted By KBA
That was more than I hoped for! :) Many thanks...

That was more than I hoped for! :)
Many thanks mate! I will have some data to work with now, gonna make sure to post updates! Cheers!
Forum: Beginner Technical/Performance 09-19-2017, 03:16 PM
Replies: 45
Views: 4,653
Posted By KBA
Slowly initiating some progress here. I am now in...

Slowly initiating some progress here. I am now in the process of building a CAD model that allows me to easily control the shape of the port by adjusting these projection splines. I have another set...
Forum: Beginner Technical/Performance 09-19-2017, 08:26 AM
Replies: 4
Views: 531
Posted By KBA
Well, I am by no means an expert in this topic,...

Well, I am by no means an expert in this topic, as I only own a head out of this motor and nothing else so far, but if it was me, I would think about a nice header to invest into. The stock manifolds...
Forum: Beginner Technical/Performance 09-19-2017, 03:40 AM
Replies: 202
Views: 44,109
Posted By KBA
aventari, Can I please ask you a favor? Seeing...

aventari,

Can I please ask you a favor? Seeing that you are now looking for new runners, I suppose you have the old runners laying around somewhere. Can you please try to measure the runner lengths...
Showing results 1 to 25 of 41

 
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