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Old 01-17-2013, 06:15 AM   #1 (permalink)
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Default What is difference in NA and TT oil pump?

I know that physically the 2G TT oil pump has a larger physical profile than the NA oil pump, but does it pump more oil or have higher pressure?
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Old 01-17-2013, 06:42 AM   #2 (permalink)
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The only differences are the structure because of the 4 bolt block and the relief spring is stiffer, leading to better oil pressure in the upper rpms.
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Old 01-17-2013, 08:23 AM   #3 (permalink)
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Default Re: What is difference in NA and TT oil pump?

hmm... would a TT relief spring swap into an n/a pump for someone looking to rev an n/a out to 8k+ or so on a regular basis
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Old 01-17-2013, 09:01 AM   #4 (permalink)
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Default Re: What is difference in NA and TT oil pump?

It would be better, but you have to take the oil pan off to change it. You will need a 1st gen TT pump to work on a 2nd gen NA pan though.

Edit: Sorry, forgot that you are just changing the spring. I recommend a new oil pump if you are already going to be down there. Unless you are building it now, which you should already have a new oil pump.

Last edited by Djmba; 01-17-2013 at 09:05 AM.
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Old 01-17-2013, 12:11 PM   #5 (permalink)
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Default Re: What is difference in NA and TT oil pump?

yea i was thinking of putting a TT spring in an n/a pump because i didn't think that you could put a tt pump on the n/a motor...

this could be quite nice if i bump my redline to 8k and maintain a stock factor of safety for the pump

but im not sure if the n/a bearing clearances are tighter than tt... you dont want too much pressure
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Old 01-17-2013, 12:29 PM   #6 (permalink)
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Default Re: What is difference in NA and TT oil pump?

Bearing clearances are the same for N/A and TT.

TT oil pump has different spring as more pressure is needed in the TT block to compensate for the turbo's, Oil cooler and oil squirters. More pressure is needed to ensure the correct flow through those additional parts.
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Old 01-17-2013, 01:23 PM   #7 (permalink)
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Default Re: What is difference in NA and TT oil pump?

Revised since Djimba's last post

Thanks for answers.

synopsis:
TT oil pump has more pressure due to relief spring tension.

TT pump relief spring in NA pump will equal TT pump pressure.

Here's one I found out from 3SX.
2G TT oil pump will fit 2G NA DOHC 2 bolt motor so 2G TT oil pan will also fit when TT oil pump is installed.

I wonder if putting a washer under the NA relief spring would equal the TT spring pressure?

Last edited by Beau_Jester; 01-18-2013 at 09:37 AM.
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Old 01-17-2013, 02:00 PM   #8 (permalink)
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Default Re: Re: What is difference in NA and TT oil pump?

Quote:
Originally Posted by Beau_Jester View Post
Thanks for answers.

synopsis:
TT oil pump has more pressure and flow due to relief spring tension.

TT pump relief spring in NA pump will equal TT pump flow and pressure.

1st Gen TT pump will fit with 2G NA oil pan.

Here's one I found out from 3SX. 2G TT oil pump will fit 2G NA DOHC 2 bolt motor so 2G TT oil pan will also fit when it is installed.

I wonder if putting a washer under the NA relief spring would equal the TT spring pressure?
I totally spaced. Actually, the 1st gen pumps will only work with 1st gen pans, just as 2nd gen pumps will only work with 2nd gen pans.

I wouldn't say "flow" is the correct word to use. They flow the same because the gears and housings are exactly the same, but in the higher revs, the relief spring gives different "pressures."

Putting in a washer is called "shimming" the pump. My oil pump has a shimmed TT spring.
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Old 12-23-2013, 04:59 AM   #9 (permalink)
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Default Re: What is difference in NA and TT oil pump?

So a 94 NA will not handle a 94 TT pump without the pan swap? Are you sure?
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Old 12-23-2013, 02:01 PM   #10 (permalink)
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Default Re: What is difference in NA and TT oil pump?

Pretty sure the pumps are the same for 2G other than the spring.

3SX Performance - OEM Oil Pumps Comparison 3000GT / Stealth*-*Mitsubishi 3000GT*/*Dodge Stealth Parts

You can't use the 4 bolt pan on your block unless you swap over the 4 bolt rear main seal housing along with it.
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