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Let's talk about porting


SLORYDER

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pretty sure he's like me and a few others and just wants to do it. doesn't matter if it costs 3x in the end, or more if the cylinders get hashed. doesn't matter if it has less power than sending them out on the first set. it's just about doing it for the pleasure...... :headbang:

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Its his money and if he wants to waste it why should anyone else care?

I would say if your only planning on doing a few set than it is a waste of money but if you want to do it as a trade or lifelong hobby read as many books as you can, ask questions and hope for answers, and study some top builders port work,then try a set or ten for yourself. If you get really good and people are asking you for specs, dont tell them.

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I don't understand? If you don't have time to obtain knowledge of what to do, how will you have time to do it ? There's more to it than just a few numbers. Everything has to work in harmony. Just my .02, oh wait that would have to be .06 with Oblama. BTW, the first set of jugs I did all I had was a bunch of die files. Looooooooooooooong time ago.

Edited by Larry's Shee
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I have easily put 20hrs into porting, being anal is my nature but thats alot of time.Compare that to jeff who can knock out a play port in 5hrs and a drag port in 12hrs.There is not to many people who tune by me so I do it all myself.There is nothing wrong with wanting knowledge but no one will give it.I have spent thousands on tooling in the past three years and need more .Any one can give you #s but where to take and leave material is experiance.Get a doner bike and start playing around,something you dont mind popping the jugs off every three hrs trying new shit

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good idea......i plan on doing my 4 mill and running it for a season and then going rz........now, maybey i should just do the minimum to run 4 mill and port in stages. if i mess up, i can just pick up some more come tax return time, and if i don't, then i can update to some betterer tooling

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sloryder, i tried to reply to your message, but i can't/don't know how to access my inbox on here. i hate this new inbox/message setup. anyway, bassed off of what you said about your port changes and assuming a .017" deck height, your new port specs are:

 

exh 187.6*(1.5mm raised)- 189.6*(2mm raised)

tr 125.2*

boost 111*

blow down 31.2*(1.5mm raised)- 32.2*(2mm raised)

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sloryder, i tried to reply to your message, but i can't/don't know how to access my inbox on here. i hate this new inbox/message setup. anyway, bassed off of what you said about your port changes and assuming a .017" deck height, your new port specs are:

 

exh 187.6*(1.5mm raised)- 189.6*(2mm raised)

tr 125.2*

boost 111*

blow down 31.2*(1.5mm raised)- 32.2*(2mm raised)

 

Sweet thanks. I'm buying a degree wheel today and am going to try to read more in my book.

Book is interesting, but man it can be difficult to read because it is so technical.

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Maybe "Snoop" should stop being such a fucking ass plug all the time, you always have such snide answers for everything, you act like your such great help, but in all actuality you're not.

Eat a dick. Im not gonna take anyone with an anime avatar and a purple/yellow banshee that has purple wheels seriously.

Edited by Snopczynski
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sloryder, i tried to reply to your message, but i can't/don't know how to access my inbox on here. i hate this new inbox/message setup. anyway, bassed off of what you said about your port changes and assuming a .017" deck height, your new port specs are:

 

exh 187.6*(1.5mm raised)- 189.6*(2mm raised)

tr 125.2*

boost 111*

blow down 31.2*(1.5mm raised)- 32.2*(2mm raised)

 

What kind of exhaust duration would you recommend with my pt hi rev's?

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What kind of exhaust duration would you recommend with my pt hi rev's?

 

i would leave it alone for now. specs seem fine to me. maybe could of had a little longer blow down time tho. on the dyno sheet i've seen of the pt hi-revs on stock porting, they peaked @ 7500. your current exhaust is good for like 9000. try out your current porting and then decide from there what else you want to do.

Edited by mopar1rules
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So I reads that the angle that the port discharges its stream has a lot to do with your powerband; steeper angles (upward) and aimed less toward the center of the bore will give you a broader powerband at the expense of maximum hp...I know the main transfer roofs are nearly flat...so I assume that there is a good deal of hp to gain by flattening out the auxillary transfers' roofs and aiming them toward the center of the bore would increase top end substantially, correct? I know this would most definately be a VERY long and tedious process and you would have to be careful not to short circuit your intake mixture out the exhaust, but what would the gains be compared to, say widening and raising the exhaust?

Edited by SLORYDER
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i would leave it alone for now. specs seem fine to me. maybe could of had a little longer blow down time tho. on the dyno sheet i've seen of the pt hi-revs on stock porting, they peaked @ 7500. your current exhaust is good for like 9000. try out your current porting and then decide from there what else you want to do.

 

PT High revs peaking at 7,500 rpm? I have several dyno sheets that put the PT mids peaking at over 8,000 rpm. So I hardly doubt the high rev was designed to peak at less rpm than than the high rev.

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