Engine New bigger throttle body

General karthief · Nov 29, 2020

Scott7512 said:
Checked idle maf voltage and it was good. Changes with increase in rpm. Did not check it per mph. It’s a pro-m unit with less than 5k miles on it.
Would a bad maf cause oil to be puddling just behind the the throttle body blade and coating the filter side of the blade?

No

KRUISR · Nov 29, 2020

Excessive oil in throttle body (to me) would be blow by pressurizing the tube from oil filler to throttle body. With engine running and warmed up, open oil filler cap. Is vapor or air blowing out?

General karthief · Nov 29, 2020

Pcv hooked up and functional

Dan02gt · Nov 29, 2020

Maybe I missed it, but do you still have the code 66 for the MAF?

Scott7512 · Nov 30, 2020

Code 66 is gone. It has not showed back up the last few times I pulled codes.
I plugged the hose fitting on the filler neck and it did build up some pressure. I have since then tie wrapped a price of cloth over it and it has not gotten oiled.
Pcv was replaced with the new heads and intake. I pulled the pcv and it’s hoses off to check for excessive oil and there was none.
As far as excessive blow by, there was no oil on the previous throttle blade or laying in the explorer intake.
I am petty sure that the small cone air filter was able to handle the airflow of the explorer heads and intake but can’t handle the new afr heads and performer intake and 70mm throttle body.
The existing air filter is a cone type that’s 4 1/2 inch round at the base and 3 1/2 at the top. It is 4 1/2 inch tall. It came with the sve cold air kit.

Dan02gt · Nov 30, 2020

If you can go back to the stock air box. It works really well. LMR sells reproductions.

KRUISR · Nov 30, 2020

Scott7512 said:
I am petty sure that the small cone air filter was able to handle the airflow of the explorer heads and intake but can’t handle the new afr heads and performer intake and 70mm throttle body.

Don't forget, a 302 cubic inch motor will only pull 525 cfm at 6000 rpm. It doesn't matter what heads, intake or throttle body, it can not pull more than that (it is just math). It can pull less if there are restrictions or rpm will be limited with restrictions. By upgrading to larger units you can't put more than that into the engine (without a blower of some kind).

Saying that I think the filter you gave the dimensions of should work fine from an airflow standpoint.

Having massive MAF's and TB's that can flow 1000-1200+ cfm on a 302 motor are just overkill that will likely hurt performance (unless you are spinning the motor to 10,000 rpm).

Scott7512 · Dec 1, 2020

New filter will be in tomorrow. I am going to connect the filler neck hose back up and give it another test run when this snow clears out.
I will post the results.

Engine New bigger throttle body

General karthief

wonder how much it would cost to ship you a pair

KRUISR

General karthief

wonder how much it would cost to ship you a pair

Dan02gt

mazing how much gas smell came from that tiny hole

Scott7512

Active Member

Dan02gt

mazing how much gas smell came from that tiny hole

KRUISR

Scott7512

Active Member

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Engine New bigger throttle body

wonder how much it would cost to ship you a pair

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