2.8 Big Bore Project (with pics)
10-15-2008, 02:06 PM
#46
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^I've been reading older threads on Oil and there are so many different opinions. I think I'll just stick with redline. What do you use Patrick?
10-15-2008, 05:27 PM
#47
Rennlist Member
Mike Lindsey recommends Gibbs Racing oils as they have the ZDDP our cars need. Many also talk of going back to dino oils as they believe they are less prone to leaking of worn seals. There are MANY opinions on this.
The universal opinion seems to be NOT to use Mobil 1 anymore for the older flat tappet cars like mine. I'm switching to Royal Purple and we'll see what happens.
10-16-2008, 05:51 AM
#49
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Yeah it's like starting a conversation on religion or politics, or worse, sport. 20w/50 is applicable down to minus 10 degrees according to the Porsche owners manual. We use 25w/60 for the track. Just don't fall for the fully synthetic 0w/40 craptrap. ZDDP is what to look for, additive or not.
10-17-2008, 01:46 AM
#50
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OK and now a Technical question:
New block is from: 89 turbo
Old block is : 86 turbo
Will the balance shafts interchange between the two?
I want to use my old balance shafts on my new block.
New block only has balance housing.
I am using a 968 Oil pan on the new 89 block. I was told I need to change the Oil pickup tube? ( The 86 is supposed to have a larger diameter. I believe it's 3" and the newer blocks have 2.5" )
Do I need to be aware of anything else that may not interchange between the 2 blocks?
Just trying to prepare for any problems I may be overlooking.
I am posting pictures of the block.....as you can see it is bare.
Thanks
New block is from: 89 turbo
Old block is : 86 turbo
Will the balance shafts interchange between the two?
I want to use my old balance shafts on my new block.
New block only has balance housing.
I am using a 968 Oil pan on the new 89 block. I was told I need to change the Oil pickup tube? ( The 86 is supposed to have a larger diameter. I believe it's 3" and the newer blocks have 2.5" )
Do I need to be aware of anything else that may not interchange between the 2 blocks?
Just trying to prepare for any problems I may be overlooking.
I am posting pictures of the block.....as you can see it is bare.
Thanks
10-17-2008, 02:56 PM
#51
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OK and now a Technical question:
New block is from: 89 turbo
Old block is : 86 turbo
Will the balance shafts interchange between the two? Yes
I want to use my old balance shafts on my new block.
New block only has balance housing.
I am using a 968 Oil pan on the new 89 block. I was told I need to change the Oil pickup tube? ( The 86 is supposed to have a larger diameter. I believe it's 3" and the newer blocks have 2.5" ) The pickup tube needs to match the pan. There are two styles, with the difference being visible at the bottom of the pan.The earlier pans have uninterupted cooling fins along the pan's bottom. The later pan has a lowered pickup location, where the fins are interupted by the lowered pickup location, it will be evident by a circle in the casting that interups the cooing fins.
Do I need to be aware of anything else that may not interchange between the 2 blocks? Oil Pressure regulator is not intercangable between the 86 and 87+ blocks.
Just trying to prepare for any problems I may be overlooking.
I am posting pictures of the block.....as you can see it is bare.
Thanks
New block is from: 89 turbo
Old block is : 86 turbo
Will the balance shafts interchange between the two? Yes
I want to use my old balance shafts on my new block.
New block only has balance housing.
I am using a 968 Oil pan on the new 89 block. I was told I need to change the Oil pickup tube? ( The 86 is supposed to have a larger diameter. I believe it's 3" and the newer blocks have 2.5" ) The pickup tube needs to match the pan. There are two styles, with the difference being visible at the bottom of the pan.The earlier pans have uninterupted cooling fins along the pan's bottom. The later pan has a lowered pickup location, where the fins are interupted by the lowered pickup location, it will be evident by a circle in the casting that interups the cooing fins.
Do I need to be aware of anything else that may not interchange between the 2 blocks? Oil Pressure regulator is not intercangable between the 86 and 87+ blocks.
Just trying to prepare for any problems I may be overlooking.
I am posting pictures of the block.....as you can see it is bare.
Thanks
10-18-2008, 05:32 AM
#52
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Yeah it's like starting a conversation on religion or politics, or worse, sport. 20w/50 is applicable down to minus 10 degrees according to the Porsche owners manual. We use 25w/60 for the track. Just don't fall for the fully synthetic 0w/40 craptrap. ZDDP is what to look for, additive or not.
After reading this thread it has me second guessing. Also winters up here are alot different than back home. I think we get into the single digits at times. What would you guys officially recommend?
10-18-2008, 07:18 AM
#53
Rennlist Member
Well it's not me that's recommending them, it's the Porsche owner's manual. If you still have yours check it out John. They say that even down to -10 below that 20w/50 is recommended in mineral oils. There's too much evidence that M1 is not the right brand for us or many older Porsches. Even up to the 996 the handbook still recommends a 20w/50 mineral which surprised us. There is plenty of in the field evidence about wear in our motors due to too thin oil without ZDDPs. Search the 993/996 threads under Charles Navaro (sp?). 20w/50 is good but not sure about the M1 brand for us.
Oil is there not only to provide lubrication, it is also there to act as a suspension film between the moving parts. You will find people pushing the M1 fully synth bandwagon, but this is not meant for our cars.
Oil is there not only to provide lubrication, it is also there to act as a suspension film between the moving parts. You will find people pushing the M1 fully synth bandwagon, but this is not meant for our cars.
10-18-2008, 07:23 AM
#54
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Well it's not me that's recommending them, it's the Porsche owner's manual. If you still have yours check it out John. They say that even down to -10 below that 20w/50 is recommended in mineral oils. There's too much evidence that M1 is not the right brand for us or many older Porsches. Even up to the 996 the handbook still recommends a 20w/50 mineral which surprised us. There is plenty of in the field evidence about wear in our motors due to too thin oil without ZDDPs. Search the 993/996 threads under Charles Navaro (sp?). 20w/50 is good but not sure about the M1 brand for us.
Oil is there not only to provide lubrication, it is also there to act as a suspension film between the moving parts. You will find people pushing the M1 fully synth bandwagon, but this is not meant for our cars.
Oil is there not only to provide lubrication, it is also there to act as a suspension film between the moving parts. You will find people pushing the M1 fully synth bandwagon, but this is not meant for our cars.
10-18-2008, 10:01 AM
#55
Race Director
So for occasional track use + daily what would be best. I have always used 20w50 Mobil 1.
After reading this thread it has me second guessing. Also winters up here are alot different than back home. I think we get into the single digits at times. What would you guys officially recommend?
After reading this thread it has me second guessing. Also winters up here are alot different than back home. I think we get into the single digits at times. What would you guys officially recommend?
10-18-2008, 12:29 PM
#57
Rennlist Member
OK and now a Technical question:
New block is from: 89 turbo
Old block is : 86 turbo
Will the balance shafts interchange between the two? Yes
I want to use my old balance shafts on my new block.
New block only has balance housing.
I am using a 968 Oil pan on the new 89 block. I was told I need to change the Oil pickup tube? ( The 86 is supposed to have a larger diameter. I believe it's 3" and the newer blocks have 2.5" ) The pickup tube needs to match the pan. There are two styles, with the difference being visible at the bottom of the pan.The earlier pans have uninterupted cooling fins along the pan's bottom. The later pan has a lowered pickup location, where the fins are interupted by the lowered pickup location, it will be evident by a circle in the casting that interups the cooing fins.
Do I need to be aware of anything else that may not interchange between the 2 blocks? Oil Pressure regulator is not intercangable between the 86 and 87+ blocks.
Just trying to prepare for any problems I may be overlooking.
I am posting pictures of the block.....as you can see it is bare.
Thanks
New block is from: 89 turbo
Old block is : 86 turbo
Will the balance shafts interchange between the two? Yes
I want to use my old balance shafts on my new block.
New block only has balance housing.
I am using a 968 Oil pan on the new 89 block. I was told I need to change the Oil pickup tube? ( The 86 is supposed to have a larger diameter. I believe it's 3" and the newer blocks have 2.5" ) The pickup tube needs to match the pan. There are two styles, with the difference being visible at the bottom of the pan.The earlier pans have uninterupted cooling fins along the pan's bottom. The later pan has a lowered pickup location, where the fins are interupted by the lowered pickup location, it will be evident by a circle in the casting that interups the cooing fins.
Do I need to be aware of anything else that may not interchange between the 2 blocks? Oil Pressure regulator is not intercangable between the 86 and 87+ blocks.
Just trying to prepare for any problems I may be overlooking.
I am posting pictures of the block.....as you can see it is bare.
Thanks
10-18-2008, 01:29 PM
#58
Race Director
"The pickup tube needs to match the pan. There are two styles, with the difference being visible at the bottom of the pan.The earlier pans have uninterupted cooling fins along the pan's bottom. The later pan has a lowered pickup location, where the fins are interupted by the lowered pickup location, it will be evident by a circle in the casting that interups the cooing fins."
First I heard of this although it makes sense..
I used my 87 oil pan (late) with an 86 block. I don't recall if I swapped the oil pickup between the blocks, would I have immediate problems or is it a problem only if tracking?
First I heard of this although it makes sense..
I used my 87 oil pan (late) with an 86 block. I don't recall if I swapped the oil pickup between the blocks, would I have immediate problems or is it a problem only if tracking?
10-18-2008, 04:02 PM
#59
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Originally posted by fortysixandtwo:
OK and now a Technical question:
New block is from: 89 turbo
Old block is : 86 turbo
Will the balance shafts interchange between the two? Yes
I want to use my old balance shafts on my new block.
New block only has balance housing.
I am using a 968 Oil pan on the new 89 block. I was told I need to change the Oil pickup tube? ( The 86 is supposed to have a larger diameter. I believe it's 3" and the newer blocks have 2.5" ) The pickup tube needs to match the pan. There are two styles, with the difference being visible at the bottom of the pan.The earlier pans have uninterupted cooling fins along the pan's bottom. The later pan has a lowered pickup location, where the fins are interupted by the lowered pickup location, it will be evident by a circle in the casting that interups the cooing fins.
Do I need to be aware of anything else that may not interchange between the 2 blocks? Oil Pressure regulator is not intercangable between the 86 and 87+ blocks.
Just trying to prepare for any problems I may be overlooking.
I am posting pictures of the block.....as you can see it is bare.
Thanks
OK and now a Technical question:
New block is from: 89 turbo
Old block is : 86 turbo
Will the balance shafts interchange between the two? Yes
I want to use my old balance shafts on my new block.
New block only has balance housing.
I am using a 968 Oil pan on the new 89 block. I was told I need to change the Oil pickup tube? ( The 86 is supposed to have a larger diameter. I believe it's 3" and the newer blocks have 2.5" ) The pickup tube needs to match the pan. There are two styles, with the difference being visible at the bottom of the pan.The earlier pans have uninterupted cooling fins along the pan's bottom. The later pan has a lowered pickup location, where the fins are interupted by the lowered pickup location, it will be evident by a circle in the casting that interups the cooing fins.
Do I need to be aware of anything else that may not interchange between the 2 blocks? Oil Pressure regulator is not intercangable between the 86 and 87+ blocks.
Just trying to prepare for any problems I may be overlooking.
I am posting pictures of the block.....as you can see it is bare.
Thanks
I will check with another dealer.
Originally posted by rickamurphy:
If you are tracking the car have he pan baffled to help prevent oil starvation in left hand turns. The motor is tilted, as you know, so oil sloshes up the side of the pan under left hand G's. Do what you can to make sure the oil pick up is always wet. If you have the dough, now would be the time to consider a dry sump, or perhaps an Accusump. Only if it going to see a fair amount of track time though... That pretty block needs to stay that way!
If you are tracking the car have he pan baffled to help prevent oil starvation in left hand turns. The motor is tilted, as you know, so oil sloshes up the side of the pan under left hand G's. Do what you can to make sure the oil pick up is always wet. If you have the dough, now would be the time to consider a dry sump, or perhaps an Accusump. Only if it going to see a fair amount of track time though... That pretty block needs to stay that way!
10-22-2008, 03:43 PM
#60
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Ok guys I need some advise, trying to spend my money wisely.
With 400$ I can either:
Medium Lighten my crankshaft. (Which shaves about 3-4 lbs. I already have an aluminum flywheel and a lightened clutch)
or
Buy an extra oil cooler.
Which would you recommend?
PS the crank has already been "Perp/cross drilled"
With 400$ I can either:
Medium Lighten my crankshaft. (Which shaves about 3-4 lbs. I already have an aluminum flywheel and a lightened clutch)
or
Buy an extra oil cooler.
Which would you recommend?
PS the crank has already been "Perp/cross drilled"