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> Question to autocrossers out there..., ... oil starvation
BMXerror
post Jun 19 2011, 11:02 AM
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Has anybody ever autocrossed without a deep oil sump and not had a problem with oil starvation? Due to a parts combination, I may have to lose mine, but I won't do so if it's gonna cost me an engine. I've got an external oil cooler so I've got plenty of capacity, but I just don't want it to starve under side loads. Asking for the benefit of others' years of experience. Thanks.
Mark D.
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jjackson
post Jun 19 2011, 02:43 PM
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QUOTE(BMXerror @ Jun 19 2011, 12:02 PM) *

Has anybody ever autocrossed without a deep oil sump and not had a problem with oil starvation? Due to a parts combination, I may have to lose mine, but I won't do so if it's gonna cost me an engine. I've got an external oil cooler so I've got plenty of capacity, but I just don't want it to starve under side loads. Asking for the benefit of others' years of experience. Thanks.
Mark D.

Autocrossed for over ten years with stock class and street prepared teeners.Did not run a deep sump.Never had a problem-Always limited skid pad runs to a few laps.Ran deep sump on our prepared four banger -when we started making more than 150 horses.JJackson
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grantsfo
post Jun 19 2011, 03:34 PM
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Can't you run a tuna can at minimum? I'd be worried given fact you run Qualcomm. That's more of a mini road course with elevation changes that you will want some level of protection. I'd be worried about longer duration turns where car isn't level.

I ran streets of willow and then 4 years of ax with only tuna can and never had issues with my 1.8 powered car.
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URY914
post Jun 19 2011, 03:36 PM
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You'll be find of 90% of the course layouts. Be careful when you see the turns that are over 180 degrees where you are turning hard for over 6 seconds or so.
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BMXerror
post Jun 19 2011, 03:41 PM
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There is another option... It may just be time to go to dry sump. (IMG:style_emoticons/default/happy11.gif) Great info, guys.
Mark D.
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GaroldShaffer
post Jun 19 2011, 09:49 PM
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I run just a tuna can. Never had any problems.
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stewteral
post Jun 20 2011, 11:01 AM
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QUOTE(BMXerror @ Jun 19 2011, 10:02 AM) *

Has anybody ever autocrossed without a deep oil sump and not had a problem with oil starvation? Due to a parts combination, I may have to lose mine, but I won't do so if it's gonna cost me an engine. I've got an external oil cooler so I've got plenty of capacity, but I just don't want it to starve under side loads. Asking for the benefit of others' years of experience. Thanks.
Mark D.


Hi Mark,

My Chevy V8-914 used to oil starve while on track. My cure was a 3-Qt ACCUSUMP (holds 2 Qts of oil) which hold high pressure oil in reserve to feed into the engine's main gallery the second the pressure drops.

Since you already have an external oil cooler, you can just add an Accusump via a "T" fitting where the cooler feeds back into the engine. The only other bit needed is a valve to control use of the Accusump.

Here's Summit Racing's page on Accusump options:
http://www.summitracing.com/search/?keywor...usump&dds=1

For $175 - $185, it's a very affordable solution.

Best,
Terry
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ConeDodger
post Jun 20 2011, 11:09 AM
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I run a half quart high and have never had problems. I plan on running an Accusump with the new motor. Cheapest way to insure oil pressure IF I were to get into a starvation situation.
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Chris Pincetich
post Jun 20 2011, 01:21 PM
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QUOTE(Garold Shaffer @ Jun 19 2011, 08:49 PM) *

I run just a tuna can. Never had any problems.

(IMG:style_emoticons/default/agree.gif)
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DanT
post Jun 20 2011, 02:17 PM
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Have run a tuna can on 4 different 914-4s...never seen a green light on track or at an ax....20+ years of running them that way! (IMG:style_emoticons/default/smile.gif)
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ConeDodger
post Jun 20 2011, 02:19 PM
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QUOTE(DanT @ Jun 20 2011, 12:17 PM) *

Have run a tuna can on 4 different 914-4s...never seen a green light on track or at an ax....20+ years of running them that way! (IMG:style_emoticons/default/smile.gif)


Dan fails to mention that there is only 1/8th of an inch between his tuna can and the pavement. He runs them 914's low to the ground! (IMG:style_emoticons/default/laugh.gif)
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DanT
post Jun 20 2011, 02:25 PM
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QUOTE(ConeDodger @ Jun 20 2011, 01:19 PM) *

QUOTE(DanT @ Jun 20 2011, 12:17 PM) *

Have run a tuna can on 4 different 914-4s...never seen a green light on track or at an ax....20+ years of running them that way! (IMG:style_emoticons/default/smile.gif)


Dan fails to mention that there is only 1/8th of an inch between his tuna can and the pavement. He runs them 914's low to the ground! (IMG:style_emoticons/default/laugh.gif)

New one isn't that low Rob.....Konis won't let me go any lower! (IMG:style_emoticons/default/smile.gif)

Need to find some threaded collars that will work with them.
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ConeDodger
post Jun 20 2011, 02:48 PM
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QUOTE(DanT @ Jun 20 2011, 12:25 PM) *

QUOTE(ConeDodger @ Jun 20 2011, 01:19 PM) *

QUOTE(DanT @ Jun 20 2011, 12:17 PM) *

Have run a tuna can on 4 different 914-4s...never seen a green light on track or at an ax....20+ years of running them that way! (IMG:style_emoticons/default/smile.gif)


Dan fails to mention that there is only 1/8th of an inch between his tuna can and the pavement. He runs them 914's low to the ground! (IMG:style_emoticons/default/laugh.gif)

New one isn't that low Rob.....Konis won't let me go any lower! (IMG:style_emoticons/default/smile.gif)

Need to find some threaded collars that will work with them.


Bradley hooked me up. I could go quite a bit lower with my Konis...
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URY914
post Jun 20 2011, 02:54 PM
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Randal
post Jun 20 2011, 06:02 PM
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QUOTE(BMXerror @ Jun 19 2011, 10:02 AM) *

Has anybody ever autocrossed without a deep oil sump and not had a problem with oil starvation? Due to a parts combination, I may have to lose mine, but I won't do so if it's gonna cost me an engine. I've got an external oil cooler so I've got plenty of capacity, but I just don't want it to starve under side loads. Asking for the benefit of others' years of experience. Thanks.
Mark D.



My car is typically running flat out with side loads as great as I can carry.

Have never had a problem with oil starvation, but I've always run an Accusump.

Cheap insurance I think.

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BMXerror
post Jun 20 2011, 07:25 PM
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QUOTE(ConeDodger @ Jun 20 2011, 01:19 PM) *

QUOTE(DanT @ Jun 20 2011, 12:17 PM) *

Have run a tuna can on 4 different 914-4s...never seen a green light on track or at an ax....20+ years of running them that way! (IMG:style_emoticons/default/smile.gif)


Dan fails to mention that there is only 1/8th of an inch between his tuna can and the pavement. He runs them 914's low to the ground! (IMG:style_emoticons/default/laugh.gif)

Mine's a little towards the low side too. With the current deep sump my ground clearance is about 3". I think I'll do the tuna can for now and go to dry sump when I can afford it (probably when I build the full on DP motor). Given your combined experiences I doubt I will have problems, especially since I'm down on net grip anyways. Plus, I have a low pressure safety on the car, so I think the engine is safe. I just don't want to be tripping it mid-run. Thanks guys.
Mark D.
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GeorgeRud
post Aug 2 2011, 08:20 PM
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Back when both the 914s and I were young, I used to run a lot of track events, and oil starvation was a real problem on long sweepers (turn one at IRP, turn 3 at Blackhawk, etc.), even with a deep sump. I would also agree with the idea of an Accusump - cheap insurance that's easy to install.
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Borderline
post Aug 2 2011, 10:40 PM
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I ran my 1911 for years with stock oil system and no problems. I've got a shallow tuna can on my 2366 now.
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SirAndy
post Aug 3 2011, 11:27 AM
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QUOTE(ConeDodger @ Jun 20 2011, 10:09 AM) *
I run a half quart high and have never had problems.

(IMG:style_emoticons/default/agree.gif)

That's what i used to do with my 1.7 and 2.0. Never had an issue either, even after i went to slicks.

(IMG:style_emoticons/default/driving.gif)
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ottox914
post Aug 12 2011, 09:47 PM
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QUOTE(SirAndy @ Aug 3 2011, 12:27 PM) *

QUOTE(ConeDodger @ Jun 20 2011, 10:09 AM) *
I run a half quart high and have never had problems.

(IMG:style_emoticons/default/agree.gif)

That's what i used to do with my 1.7 and 2.0. Never had an issue either, even after i went to slicks.

(IMG:style_emoticons/default/driving.gif)


I run the tuna can and a 1/2 qt with no problems in 10+ yrs of autox. NA and turbo.
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