987.1 vs 997.1 Motor - Same Inherent Issues?
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Thread: 987.1 vs 997.1 Motor - Same Inherent Issues?

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    987.1 vs 997.1 Motor - Same Inherent Issues?

    I was curious if the 997.1 911/911 S have the same inherent issues with their motors as the cayman does. For example, I am referring to the oiling issues and the remote IMSicon issue. I believe water pumps are just as common on both cars. In considering track days I'm not sure if I'd be any better off getting a 911 of the similar vintage (06-08).

    - AJ
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    Re: 987.1 vs 997.1 Motor - Same Inherent Issues?

    The 987.1 oiling issues are due to the fact that Porsche took a 911 engine and turned it around for the 987. The engine was designed for the 911, so it doesn't have the oiling issue in that platform. Running it backwards in the 987 is the genesis of the problem. IMSicon and wp are the same, so same potential issues there.

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    Re: 987.1 vs 997.1 Motor - Same Inherent Issues?

    That's interesting that the same motor in a different application doesn't have those issues - are the oil pickups different on the 911?

    Do you have any enhancements on your CS for DEs?
    2015 Boxster S Carrera White over Black Sports Seats
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    Re: 987.1 vs 997.1 Motor - Same Inherent Issues?

    Not motor related, but transmissions have the same issue with rotation 911 vs 98x. In 911 configuration (engine at rear, transmission bell housing facing the rear), when accelerating, oil builds up at the bell housing end, bathing the differential in oil. In a 98X, the oil pushes away from the bell housing and there have been some differential failures in 98X transmissions on the track. However, the gear stack gets bathed better by oil in a 98X.

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    Re: 987.1 vs 997.1 Motor - Same Inherent Issues?

    Quote Originally Posted by popcornten View Post
    That's interesting that the same motor in a different application doesn't have those issues - are the oil pickups different on the 911?

    Do you have any enhancements on your CS for DEs?
    I'm not an engineer and I didn't stay at a Holiday Inn, so I may not say this technically correct but...
    In order for Porsche to use a 911 engine in a 987, they have to turn it 180*. The design for oil passages and returns work differently depending on the direction the engine is pointing. What Porsche and their 987 customers found out the hard way the was oil wasn't flowing as freely in the 987 configuration in certain situations - specifically long, sweeping corners (I don't remember if right or left). This caused the #6 cyl to be starved, which ultimately lead to the ruination of the #6 rod. So to your original question, a 997 will not have the same oiling issues as a 987.

    The most important mod I have in my CSS is an EBS oil baffle. The factory baffle goes about 3/4 of the way up, but what happens in long corners is the oil can slosh out of the middle section (the baffle creates 3 sections) and the oil pump can go dry. I put the EBS baffle in last yr before I ran at Kansas Speedway. Its baffle walls go all the way up. It was not a bolt in application - I needed to do some ample modifying to get it to fit properly. But I was glad to have it on a banked oval.

    The other mods - Tarett suspension bushings (wore my factory ones out last yr at Kansas), Tarett rear toe arms (waaaaaay better than factory - they use a turnbuckle rather than a flimsy cam bolt), an IPD plenum and GT3 TB (not worth it unless you do a software upgrade, which I didn't), plus braided brake lines.

    When possible, I try to shift at 6K rpm rather than taking it into the 7 range. Figure that is a bit easier on the engine and since I'm not racing for prize money, I don't care if it costs me a bit of speed. I'm happy if it gets me to the next DE.
    Last edited by husker boxster; 10-01-2015 at 03:42 PM.

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    2008 Cayman S Sport

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    Re: 987.1 vs 997.1 Motor - Same Inherent Issues?

    I always come back to the same answer - buy a damn 987.2 lol. I just can't find one I like even half as much of the unicorn I found in February.
    2015 Boxster S Carrera White over Black Sports Seats
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