Pineapple Porting
06-03-2003, 08:52 PM
#61
Junior Member
Join Date: May 2003
Location: Dallas, TX USA
Posts: 21
Some engine builders believe in a super smooth port finish. I personally don't. I leave my ports in-between a smooth finish with a rough feel. Fuel needs to aptomize and blend with air/oxygen. I have tried both ways and I have found some different results both ways. Example one engine that was very smooth would not take or consume the same amount of fuel as the other engine that had a smooth but rough finish. this thread is getting intresting. I have more examples of both types of ports but Ill see if members are intrested in this topic.
I would be very interested in what your thoughts are on this. Ive got my own theorys on this, but un-shure if im on the right track.
06-04-2003, 01:05 AM
#62
Senior Member
Join Date: Jul 2001
Posts: 146
Originally Posted by Judge Ito' date='Jun 2 2003, 04:35 PM
Some engine builders believe in a super smooth port finish. I personally don't. I leave my ports in-between a smooth finish with a rough feel. Fuel needs to aptomize and blend with air/oxygen. I have tried both ways and I have found some different results both ways. Example one engine that was very smooth would not take or consume the same amount of fuel as the other engine that had a smooth but rough finish. this thread is getting intresting. I have more examples of both types of ports but Ill see if members are intrested in this topic.
06-04-2003, 08:57 AM
#64
Senior Member
Join Date: Jun 2002
Location: La Plata, Maryland
Posts: 9,725
Not I, My thought son porting are to sand them down with some 120 grit and leave it at that.
I dont think that the runners need to be that smooth and I also think that the a/f mix gets atomized better on the rougher walls.
As long as the shape is good that is.
I dont think that the runners need to be that smooth and I also think that the a/f mix gets atomized better on the rougher walls.
As long as the shape is good that is.
06-04-2003, 12:47 PM
#66
Junior Member
Join Date: Jun 2003
Posts: 2
I do some of the porting here at pettit racing. I know thats pretty far from you guys. But our porting is some of the nicest stuff I've seen. @ 15 psi we can achieve 500+ rwhp. And thats just a street port. One thing that is very important is surface finish. The rule that I have been taught is: Make it perfectly smooth. right up until the fuel injectors. Then the surface finish changes. I've heard ITO does very nice work. And I'm sorry to hear that someone had a bad expierence with pineapple. If you guys want a quote PM me and I'll be happy to get you one.
pettitman
pettitman
06-04-2003, 01:03 PM
#67
Senior Member
Join Date: May 2002
Location: California
Posts: 22,465
Originally Posted by pettitman' date='Jun 4 2003, 09:47 AM
I do some of the porting here at pettit racing. I know thats pretty far from you guys. But our porting is some of the nicest stuff I've seen. @ 15 psi we can achieve 500+ rwhp. And thats just a street port. One thing that is very important is surface finish. The rule that I have been taught is: Make it perfectly smooth. right up until the fuel injectors. Then the surface finish changes. I've heard ITO does very nice work. And I'm sorry to hear that someone had a bad expierence with pineapple. If you guys want a quote PM me and I'll be happy to get you one.
pettitman
pettitman
mike
06-05-2003, 02:14 AM
#69
Junior Member
Join Date: Feb 2003
Posts: 21
Judge,yes he does have a back door number,but i forget to get it when i leave.i will try to remember on thursday.i am trying to get my first gen done by friday so i acn race it this weekend.should be an interesting ride i set the engine back 3in.into the chasis.the motor makes around 230 at the flywheel with out Nitrious(large streetport)and i have a 150 directport shot.I'll post some timeslips on sunday.
06-06-2003, 08:23 PM
#70
Senior Member
Join Date: Jan 2002
Location: NJ USA
Posts: 1,915
Originally Posted by badass7' date='Jun 4 2003, 06:11 AM
BTW Judge Ito, my guy's name is David Biggers and he is in Orlando, FL. Have you...or anyone else here ever heard of him by chance ?