Dimension, depth of O-ring!?
05-30-2002, 02:41 PM
#16
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Nik,
Re [quote]SATX 944T (Wayne): Very nice page you've got there, how much do you boost with your o-rings? What's the max boost you've tried? <hr></blockquote>
The motor and the body are not yet back together so I cant tell you any boost figures just yet. When I get the 951 back together I'll be running it on less than max boost while I break the rebuilt engine - primarily because I havent yet upgraded the injectors to deliver the fuel needed by the larger turbo/MAF etc if I were to run it at high boost. I will have a trial and error process to go thru with fuel pressure and boost settings vs AF ratio before I find what boost I can run without leaning out. But with these stock injectors I am sure it will lean out well before I get to any "high" level of boost. So I guess it will be a little while before I stress test the head/orings.
Wayne.
Re [quote]SATX 944T (Wayne): Very nice page you've got there, how much do you boost with your o-rings? What's the max boost you've tried? <hr></blockquote>
The motor and the body are not yet back together so I cant tell you any boost figures just yet. When I get the 951 back together I'll be running it on less than max boost while I break the rebuilt engine - primarily because I havent yet upgraded the injectors to deliver the fuel needed by the larger turbo/MAF etc if I were to run it at high boost. I will have a trial and error process to go thru with fuel pressure and boost settings vs AF ratio before I find what boost I can run without leaning out. But with these stock injectors I am sure it will lean out well before I get to any "high" level of boost. So I guess it will be a little while before I stress test the head/orings.
Wayne.
06-26-2002, 05:07 AM
#18
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Hi everyone!
Just wanted to let you know I've replaced my headgasket now and I did make a 1 mm wide/0,45mm deep track (in the head) in the middle of fire ring. I went for a thicker one, 1,4mm vs 1mm (original) and I also installed a 3 bar FPR. I run approx 15 psi of boost and I'm running rich (A/F ratio)
Here are some pictures of the blown gasket (4:th cylinder) and everything mounted, I think my gasket looked very fresh if you compare to Dannos:
Pic 1:
Pic 2:
Pic 3:
Pic 4:
Keep up th boost!! <img src="graemlins/wave.gif" border="0" alt="[byebye]" />
Just wanted to let you know I've replaced my headgasket now and I did make a 1 mm wide/0,45mm deep track (in the head) in the middle of fire ring. I went for a thicker one, 1,4mm vs 1mm (original) and I also installed a 3 bar FPR. I run approx 15 psi of boost and I'm running rich (A/F ratio)
Here are some pictures of the blown gasket (4:th cylinder) and everything mounted, I think my gasket looked very fresh if you compare to Dannos:
Pic 1:
Pic 2:
Pic 3:
Pic 4:
Keep up th boost!! <img src="graemlins/wave.gif" border="0" alt="[byebye]" />
06-26-2002, 04:29 PM
#19
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Nik,
In my old 2.5L it used double O-rings in the head w/receiving grooves in the cyl. liners. That is now considered an old school approach. It may/did work fine for the 2.5L. In the 3.1L, it uses concentric O-rings w/o an receiving groove. One in the liner and one in the head. Both w/stainless wire. 20+Lbs. of boost, all the way to 7000 RPM. Never had a leakage problem, knock on wood.
In my old 2.5L it used double O-rings in the head w/receiving grooves in the cyl. liners. That is now considered an old school approach. It may/did work fine for the 2.5L. In the 3.1L, it uses concentric O-rings w/o an receiving groove. One in the liner and one in the head. Both w/stainless wire. 20+Lbs. of boost, all the way to 7000 RPM. Never had a leakage problem, knock on wood.
06-26-2002, 07:03 PM
#20
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check my web site for 1.6 bar.avi
you need divx fro divx.com a splug in.
No o-ring no cup car head gasket nothing. test is on 3rd,4th and 5th gear. gasket is 12 years old and has run 140000 km.
just enough fuel an super plus gas 99 euro octan (about 93-94 US octane). thats all
<a href="http://www-public.tu-bs.de:8080/~y0003315/9511.html" target="_blank">http://www-public.tu-bs.de:8080/~y0003315/9511.html</a>
Konstantin
you need divx fro divx.com a splug in.
No o-ring no cup car head gasket nothing. test is on 3rd,4th and 5th gear. gasket is 12 years old and has run 140000 km.
just enough fuel an super plus gas 99 euro octan (about 93-94 US octane). thats all
<a href="http://www-public.tu-bs.de:8080/~y0003315/9511.html" target="_blank">http://www-public.tu-bs.de:8080/~y0003315/9511.html</a>
Konstantin
06-27-2002, 07:22 AM
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86944turbo: "One in the liner and one in the head. Both w/stainless wire. 20+Lbs. of boost, all the way to 7000 RPM." That I don't doubt...I would say "bullet proof" construction!
Konstantin: Interresting reading, are you running with bigger injectors..replaced EFI? Have you got some more info to me about your machine? What other upgrades do you have?
//Niclas
Konstantin: Interresting reading, are you running with bigger injectors..replaced EFI? Have you got some more info to me about your machine? What other upgrades do you have?
//Niclas
06-27-2002, 09:08 AM
#22
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no bigger injectors just a MAF and an ARC2. I use a 4.05 bar FPR and adjust this with the ARC2 along with some custom chips for a k27.
I have the bigger injectors at my desk and I will install them one day but at the Momment I do not see a need for them ;-)
Konstantin
I have the bigger injectors at my desk and I will install them one day but at the Momment I do not see a need for them ;-)
Konstantin