PORTING (making sense of it all)

[Grant Monkhouse]

I really don\'t see why you have bothered posting Tommo, if you had a question on any of the subjects then fair enough but to pop up, slate someone you don\'t know then disappear is honestly pointless. As far as I can see your post is the only jibberish here, at least others have asked questions about the subjects being discussed.

If the information is too hard for you to understand then don\'t bother looking at it. Or I could alternatively point you in the direction of some pop up books?

[matt p]

Would be good to hear more thoughts on porting

The parts about scalloping the rotors was interesting, bit like cutting in valve cuts on pistons for higher revs

[DJ Tommo]

You do realise that Rice is all the way over in australia right??

Very aware, thanks for taking time to point out that pointless piece of information.

I really don\'t see why you have bothered posting Tommo, if you had a question on any of the subjects then fair enough but to pop up, slate someone you don\'t know then disappear is honestly pointless. As far as I can see your post is the only jibberish here, at least others have asked questions about the subjects being discussed.

If the information is too hard for you to understand then don\'t bother looking at it. Or I could alternatively point you in the direction of some pop up books?

Yes, but replying to my pointless post with you pointless post is pointless in itself as it is still off topic. If you read my post, there is a question. If you have a problem with me, deal with it off the forum please in a polite manner. You can PM me on FDUK if you like. No need to get your knickers in a twist with me asking a question. Also where have I "disappeared" to? I\'m still here...

I want MOAR info about porting please because that what I wanna read about. Start another thread as discussed earlier for compression ratios and . Unless like i said there is a correlation between compression ratios and the port size? (as per last post) In which case, continue and I will try to read and get a better understanding. What about J port setups?

After re-reading the "scallop rotor" mods do sound interesting. In fact, they sound pretty damn awesome. Thumbs up!

I\'m happy with the "Hungry Caterpillar" thank you very much...

[Erdin]

Very aware, thanks for taking time to point out that pointless piece of information.



Yes, but replying to my pointless post with you pointless post is pointless in itself as it is still off topic. If you read my post, there is a question. If you have a problem with me, deal with it off the forum please in a polite manner. You can PM me on FDUK if you like. No need to get your knickers in a twist with me asking a question. Also where have I "disappeared" to? I\'m still here...

I want MOAR info about porting please because that what I wanna read about. Start another thread as discussed earlier for compression ratios and . Unless like i said there is a correlation between compression ratios and the port size? (as per last post) In which case, continue and I will try to read and get a better understanding. What about J port setups?

After re-reading the "scallop rotor" mods do sound interesting. In fact, they sound pretty damn awesome. Thumbs up!

I\'m happy with the "Hungry Caterpillar" thank you very much...

I really don\'t see why you have bothered posting Tommo, if you had a question on any of the subjects then fair enough but to pop up, slate someone you don\'t know then disappear is honestly pointless. As far as I can see your post is the only jibberish here, at least others have asked questions about the subjects being discussed.

If the information is too hard for you to understand then don\'t bother looking at it. Or I could alternatively point you in the direction of some pop up books?

Guys this is a good thread, lets not :censored::censored::censored::censored::censored: on here.

For dose that don\'t agree with what is being discuses, please keep things professional and explain your opines and reasons.

[Will66]

Yes, but replying to my pointless post with you pointless post is pointless in itself as it is still off topic.

Then why did you make a pointless post in the first place?

Also, describing detailed data and logical conclusions from such data isn\'t gibberish.  If you can\'t take them time to try to understand it, that\'s not the poster\'s problem.  Inevitably any discussion of relative tuning techniques is going to hive off down any number of increasingly complex avenues.  There are many better ways to steer a discussion than the one you employed.

Back to the Topic in hand.

[DJ Tommo]

My question alas remains an answered.


Does porting affect compression ratio? and does he have an example of a J port design?

Back to topic...

[Grant Monkhouse]

Compression ratio is dictated by the bowl of the rotor.

Porting is on the side plate.

Blitz and rob have an example of a j port so they could posts their results. It\'s about everyone sharing info. Not just rice.

[HaywardRotary]

My question alas remains an answered.


Does porting affect compression ratio? and does he have an example of a J port design?

Back to topic...

Modified inlet porting does not affect compression ratio. Scalloping the rotors does.

[DJ Tommo]

Modified inlet porting does not affect compression ratio. Scalloping the rotors does.

This I can understand, thankyou Carl and thankyou Grant:Thumbs-up

Had a read, understanding more now, am I right in thinking though that an n/a engine makes power in a completely different way though? And a turbo engine runs like poop without boost, so will never make it`s theoretical n/a power equivalent, add the whole compression ratio thing into it and it`s all cream crackered? How can these results/calculations be 100% or is it dependent on something like intake temps?

Forgive me if this has been asked already.

[Erdin]

This I can understand, thankyou Carl and thankyou Grant:Thumbs-up

Had a read, understanding more now, am I right in thinking though that an n/a engine makes power in a completely different way though? And a turbo engine runs like poop without boost, so will never make it`s theoretical n/a power equivalent, add the whole compression ratio thing into it and it`s all cream crackered? How can these results/calculations be 100% or is it dependent on something like intake temps?

Forgive me if this has been asked already.

Hi Tommo,

The calculations are based on ideal situations but as we know there are no such thing as an ideal situation as air temp, water temp and other factors will change things. hope that helps:Thumbs-up

[HaywardRotary]

N/A engines are running at 1bar absolute air pressure.
Turbo engines start at that and then as the turbo comes in the boost pressure varies from 1 bar absolute to gradually increasing as the revs and load increase to whatever it is set to run at in a controlled way.
all boost guages measure boost after it has gone over 1 bar absolute, so for example if you are running 14.7 (1bar) psi boost on your guage you are actually running 29.4 psi (2 bar) as measured including absolute air pressure.

[Erdin]

This I can understand, thankyou Carl and thankyou Grant:Thumbs-up

Had a read, understanding more now, am I right in thinking though that an n/a engine makes power in a completely different way though? And a turbo engine runs like poop without boost, so will never make it`s theoretical n/a power equivalent, add the whole compression ratio thing into it and it`s all cream crackered? How can these results/calculations be 100% or is it dependent on something like intake temps?

Forgive me if this has been asked already.

N/A engines are running at 1bar absolute air pressure.
Turbo engines start at that and then as the turbo comes in the boost pressure varies from 1 bar absolute to gradually increasing as the revs and load increase to whatever it is set to run at in a controlled way.
all boost guages measure boost after it has gone over 1 bar absolute, so for example if you are running 14.7 (1bar) psi boost on your guage you are actually running 29.4 psi (2 bar) as measured including absolute air pressure.

And just to add N/A 1 bar is 1 bar atmosphere at sea level, if im not mistaken.

[colum]

Blitz and rob have an example of a j port so they could posts their results. It\'s about everyone sharing info. Not just rice.

Do they???

Both are bridgeports dude

:/

[matt p]

Compression ratio is dictated by the bowl of the rotor.

Porting is on the side plate.

Blitz and rob have an example of a j port so they could posts their results. It\'s about everyone sharing info. Not just rice.

Thought Marco was running full bridge

[Grant Monkhouse]

Do they???

Both are bridgeports dude

:/

I meant robs is supposed to be a big bridge aka monster/ J port (hence the discussion on other site about the need for one piece seal) and blitz had tuned it so they have the results that they could add to the table.