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Old 08-08-2011, 01:52 AM   #1
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Default To oil pump or not to oil pump?

That is the question.
I have read a lot here on the subject and cant seem to find an answer.

I am doing a rebuilt 1.8(M-tuned rods, ARP head studs, MLS gasket) going in a 90 track car that is light. Torsen rear end, and four transmissions in the wings.... I am going for:

Goal 250(first)~300whp on a 2860rs or BW 6258 efr(haven't decided yet).

Do I need a fancy oil pump?
Where is the line where I need to start letting this bug me?

Last edited by VitaminD; 08-08-2011 at 04:07 PM. Reason: clarification
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Old 08-08-2011, 02:00 AM   #2
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After you mentioned "track car" the question was already answered.


WHY OIL PUMP?

BECAUSE RACE CAR
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Old 08-08-2011, 02:23 AM   #3
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Quote:
Originally Posted by 18psi View Post
After you mentioned "track car" the question was already answered.


WHY OIL PUMP?

BECAUSE RACE CAR
Man I hear your logic, but what is the general consensus on when to do this mod? Race car is subjective.
I trailer the car to events and it isnt a daily driver.
If it is a 300hp mod I am a few years off, if it is a 250hp deal I have to do it tomorrow.

d
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Old 08-08-2011, 02:31 AM   #4
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HP is somewhat part of the equation. I'm more interested in what your RPM limit will be.
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Old 08-08-2011, 02:35 AM   #5
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I'm a ***** foot...stock redline.
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Old 08-08-2011, 02:36 AM   #6
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Yes rpm limit and how often/long you plan to stay in the upper rpm range. Race car usually stays up there for majority of its lifetime.

Its not like a street cars that will hit redline for a couple gears then be driven slow for a week or two.
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Old 08-08-2011, 03:21 AM   #7
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North of 8000rpm at any power level. North of 300wtq at 7000rpm. You probably want them.
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Old 08-08-2011, 05:13 AM   #8
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Is it worth a motor and a race weekend? yes.
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Old 08-08-2011, 09:36 AM   #9
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Thanks for the responses guys. I think I may skip it for now, and keep the boost and the RPMs down.
Bond, using your logic I could add a lot of other parts to the build as well to try to make it bulletproof, but unfortunately I am doing this on a tight budget. Most likely the motor would come out in the future and get some other choice parts(pistons, main studs, and a oil pump) before I head anywhere north of the 250~275whp range anyways. Baby steps.
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Old 08-08-2011, 10:35 AM   #10
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I have a stock oil pump in mine and never go above 7k rpm and shift at 6500rpm or so for the 5th-6th gear stuff. Next time I pull the motor I will add a real oil pump and gears.
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Old 08-08-2011, 12:17 PM   #11
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Quote:
Originally Posted by hustler View Post
I have a stock oil pump in mine and never go above 7k rpm and shift at 6500rpm or so for the 5th-6th gear stuff. Next time I pull the motor I will add a real oil pump and gears.
What are your whp/tq numbers right now?
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Old 08-08-2011, 12:42 PM   #12
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Quote:
Originally Posted by VitaminD View Post
What are your whp/tq numbers right now?
242whp/235wtq on a Dynojet at a measly 11.5psi. I may start running the car at 13psi to make 250whp on a Mustang Dyno to match Jeffman's car.
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