Gas ported pistons?

[Saleen S281]

I saw a segment on "Engine Power" tv show talking about horizontal gas porting pistons to increase the seal of the top ring. I did a search and nothing came up. Anyone ever do this on their build?

 

[BruceH]

Piston manufacturers do this. I'll see if I can dig up some pics.

Edit: I only found one set with the top ring ported. They all have the oil rings ported.

It's a Mahle that was built to Yates specs for the FR500C. Nice piston with a 3.705" bore requirement.

 

[Saleen S281]

Thanks Bruce,that's pretty much what they showed, ever build a 3v with these? Pros/cons?

 

[Unreal]

Pretty common on high HP LS builds. Friends 416ci motor sitting at the shop is gas ported on the top. Builder (LME out of Houston) said they see 3-5% power increase on n/a motors with gas porting.

 

[Livernois Motorsports]

It's a combo of a Napier second with a gas port and a vac pump to net some good results. Usually see side gas port on a round e round combo or a heavy power adder car. N/A combo's generally use the top gas port as it is more efficient.

 

[lethe]

I though someone here used gas ported pistons on their 3v build. I don't remember who though.

 

[Saleen S281]

It's a combo of a Napier second with a gas port and a vac pump to net some good results. Usually see side gas port on a round e round combo or a heavy power adder car. N/A combo's generally use the top gas port as it is more efficient.

Would you recommend horizontal gas porting on a street turbo 3v? Say, 650-800whp?

 

[Livernois Motorsports]

Street turbo, side gas port. The top gas port has a tendency to carbon up on street cars therefor defeating the purpose.

 

[BruceH]

Thanks Bruce,that's pretty much what they showed, ever build a 3v with these? Pros/cons?

I haven't. I picked up two sets of the Yates pistons for future use so maybe in the future.

 

[travelers]

I would say maybe limited on a street car but not on a daily driver. That will increase ring ware.

 

[SSPSTANGBANGER]

Vertcal is only for high RPM N/A racecar stuff. I have used lateral gas ported pistons with Napier second rings in many mod motors N/A and boosted. I have a set of custom lateral gas ported going in my 2014 Coyote turbo motor.

 

[psfracer]

I have them. Race application, 16:1 compression, 8200 rpm. Total Seal ring set.

 

[Saleen S281]

Thanks for the info guys, I don't dd my car, rarely drove it really but I would need for it to be streetable. I'm trying to gather info so when it's time to forge my bottom-end, I'll have an idea. I gather this isn't very common?

 

[psfracer]

Not for daily driver stuff. N/A race applications, yes.

 

[travelers]

I have them. Race application, 16:1 compression, 8200 rpm. Total Seal ring set.

Nice.

 

[Saleen S281]

Not for daily driver stuff. N/A race applications, yes.

Thanks!

 

[Livernois Motorsports]

just laughing a little about this one as we don't want guys scarred to do this to just about any application. Gas porting increases ring seal therefore power and efficiency. Does this effect ring wear yes. What kind of cycle life are guys running on these combo's? Sure if you are doing a rebuild for a driver your not going to gas port the Sealed Power pistons that came in your $too cheap refresh kit that you plan on putting 100K miles on.
Your weekend warrior nice day "Street car" is not going to rack up miles like you think. Members with stroker motors with ported heads and custom cams and big ol power adders are lucky to see a few thousand miles a year. Keep in mind people should have a planned tear down and refresh schedule based off of hours, passes or time once you move into the big HP world.

 

[SSPSTANGBANGER]

I think the message was not that gas porting in general is a race engine thing. But that vertical gas ports are a n/a race engine thing mostly and that lateral gas ports are great on many applications

 

[psfracer]

Does this effect ring wear yes. What kind of cycle life are guys running on these combo's? Sure if you are doing a rebuild for a driver your not going to gas port the Sealed Power pistons that came in your $too cheap refresh kit that you plan on putting 100K miles on.

I stand by my statement. This is not for daily driver stuff.

But that vertical gas ports are a n/a race engine thing mostly

X2