302 Intake Interchangability

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Nov 15, 2003 | 01:27 AM

GEAH

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From: St. Louis, MO

302 Intake Interchangability

I have a 302 efi from an 86 E150. The upper intakes on the mustangs and E series are not the same but are the lower intakes?

The question I have is will the lower intake from a 5.0 mustang or other HO engine bolt directly to my existing setup?

Nov 15, 2003 | 02:52 AM

Txquadhunter24

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Yes the Lower intakes compatable. Theres quite a Few who use the Truck uppers on stangs to get a little more low end power for short track Drag racing If there not to overly built. It'll knock your truck out of it's power range but you could even put the Stangs upper with lil Fab work. Which is what some are doing to pull more HP from the lightings. But as for any other as in a 351w the upper yes, But lower no, the Intake is wider then the 302.

Nov 16, 2003 | 12:32 AM

motorheadmach1

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From: nowhere town nj

oh so if ir ead that right your saying you cna put a trucl upper on an HO lower? but not the other way around? i was wondering the same thing as GEAH i was thinkgin of swapping an HO intake both plenium and manifold to my truck.

Nov 16, 2003 | 12:14 PM

GEAH

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From: St. Louis, MO

I think What he is saying is that the uppers are different like I said. But the lowers are the same as far as what bolts to the heads. The bolt pattern that fixes the upper and lower together are different on the two different lowers. So I think what this means is that I can take both the upper and lower from an HO and put in on mine and vise versa but the upper from mine wont bolt to an HO lower and an HO upper wont bolt directly to my OEm lower.

Correct me if IM wrong

Nov 16, 2003 | 06:53 PM

motorheadmach1

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From: nowhere town nj

ok i figured out thats how it works comparing gaskets, they both only go with their corrosponding manifolds. the HO manifold has a coolant passage into the upper plenium as the truck manifold does not. and the runners are round on the ho as apposed to the rectangle of teh truck.

Nov 16, 2003 | 07:59 PM

Txquadhunter24

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The truck has the coolant passage too. What I was meaning by the uppers being diffirent is the plenium on the cars have a single buttlerfly throttle body and the trucks have dual butterfly throttle body. The throttle cable isn't mounted the same and differ by the way the cable pulls to open the butterfly. Then the port runners are diff. lengths due to the RPM range the Stangs run on and trucks run on. example. Say your building a truck to run in the 2,000-6,000 RPM range you could use the HO system from the stangs because they are built to make power in the higher RPM range. But it your building a motor to work in the Low end range like a truck you can use it's system because it's made to build power from Idle-4,000 or so RPM range. You can route the coolant plumping to run straight to your rad. like found on EFI HO's and the EFI 351's. I know my 86 F150 with EFI 302 even has the Port on the rad. already there just capped off. I'm not sure if the vans do or not. The easiest way to see what I'm talking about is look at the stangs sysyem next to a EFI trucks system. Even know the 351 intake is wider, You can take the upper and bolt it right onto a 302 lower intake. But as for the lower intake the truck and the stang are pretty much the same.

Last edited by Txquadhunter24; Nov 16, 2003 at 08:04 PM.

Jan 6, 2004 | 03:25 AM

GEAH

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From: St. Louis, MO

Thanks for the help. I finally got it put in and its a MUCH better fit than the original. The only differences Ive noticed so far is the PCV valve is located on the Lower intake on the mustang and in the valve cover on the E series engine and and there are 2 extra coolant fittings.