Thoughts on 1 piece 2mm seals?

Whizbang · 12-09-2008, 03:02 PM

What is the advantage of using these over a 2 piece seal? Atkins seals them as a "race" seal so i am curious.

-xlr8planet- · 12-10-2008, 06:22 AM

if you go jport or big bridge, you cant use 2 piece seals, the triangular piece could fall into the intake port

12arotary · 12-10-2008, 07:54 PM

Quote:

Originally Posted by -xlr8planet-

if you go jport or big bridge, you cant use 2 piece seals, the triangular piece could fall into the intake port

if you just do a half bridge you won't have to worry about that-

TheDriver216 · 12-10-2008, 08:13 PM

You have to clearance 1 piece seals a little more to give room for expansion which can also cause tough cold starting.

-xlr8planet- · 12-10-2008, 08:14 PM

Quote:

Originally Posted by 12arotary

if you just do a half bridge you won't have to worry about that-

thats why I AM doing a half bridge

12arotary · 12-10-2008, 08:29 PM

Quote:

Originally Posted by -xlr8planet-

thats why I AM doing a half bridge

though from what I have read the power out put from a half bridge vs a large street port don't seem to be worth it with the wear on a bridge or half bridge being significantly more and reliability goes down, I'd say full or none

classicauto · 12-10-2008, 03:40 PM

Never tried a 1 piece seal yet, but I know the 5+ failures I've had of OEM seals (and atkins.....) were breakages that occured at the very tip of the long portion of the seal, where it meets the corner piece. Given that alone, I'd say a 1 piece seal might take 2-3 more pings vs. a 2 pc. Of course, when it does fail, its probably going to take a lot more stuff with it too

Also, I know the dynamic compression of 1piece seals is not as high as 2piece given the sealing surface of the 2 piece can move around a little more and "fit" the housing/irons better.

classicauto · 12-11-2008, 10:45 AM

Yes and no on that. I ran a 1/2 bridge for a while, still have the plates and may go back to it eventually. Its good, but there's not the FULL benefit there obviously. However it'll ABSOLUTELY spool the turbo faster and will net a slight power increase if only attributed to the harder hitting turbo response. Definetely worth while, although more gain can be had with a full bridge for sure.

Whizbang · 12-11-2008, 02:45 PM

maybe ill just fiddle with 2mm 2pc seals then.

12-09-2008, 03:02 PM	#1
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp iTrader: (5) Posts: 3,190 Rep Power: 20	Thoughts on 1 piece 2mm seals? What is the advantage of using these over a 2 piece seal? Atkins seals them as a "race" seal so i am curious. __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook

12-10-2008, 06:22 AM	#2
-xlr8planet- RCC Contributor Join Date: Feb 2008 Location: Buenos Aires, Argentina iTrader: (4) Posts: 679 Rep Power: 17	if you go jport or big bridge, you cant use 2 piece seals, the triangular piece could fall into the intake port __________________ www.rx7club.com.ar RX-7 Forum in Spanish I make custom decals. Yes, you can ask me

12-11-2008, 02:45 PM	#9
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp iTrader: (5) Posts: 3,190 Rep Power: 20	maybe ill just fiddle with 2mm 2pc seals then. __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook

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12-10-2008, 08:13 PM	#4
TheDriver216 Rotary Fanatic Join Date: Feb 2008 Location: Cleveland, Ohio iTrader: (1) Posts: 159 Rep Power: 17	You have to clearance 1 piece seals a little more to give room for expansion which can also cause tough cold starting.

12-10-2008, 03:40 PM	#7
classicauto crash auto?fix auto Join Date: Feb 2008 iTrader: (0) Posts: 816 Rep Power: 17	Never tried a 1 piece seal yet, but I know the 5+ failures I've had of OEM seals (and atkins.....) were breakages that occured at the very tip of the long portion of the seal, where it meets the corner piece. Given that alone, I'd say a 1 piece seal might take 2-3 more pings vs. a 2 pc. Of course, when it does fail, its probably going to take a lot more stuff with it too Also, I know the dynamic compression of 1piece seals is not as high as 2piece given the sealing surface of the 2 piece can move around a little more and "fit" the housing/irons better.

12-11-2008, 10:45 AM	#8
classicauto crash auto?fix auto Join Date: Feb 2008 iTrader: (0) Posts: 816 Rep Power: 17	Yes and no on that. I ran a 1/2 bridge for a while, still have the plates and may go back to it eventually. Its good, but there's not the FULL benefit there obviously. However it'll ABSOLUTELY spool the turbo faster and will net a slight power increase if only attributed to the harder hitting turbo response. Definetely worth while, although more gain can be had with a full bridge for sure.