Best upper intake for a 5.8?

[Hal9000]

Too bad, I think everybody got all excited there for a second.

Regarding that hole in the center, it could be egr, but couldn't it also be a manifold preheat tube to help with cold weather warmup. I can't tell for sure, but it looks like it connects to the center water jacket.

 

[mattt]

The hole in the center is for EGR.....at least it is on my factory Lightning intakes.

 

[73azbronco]

I'll know in a week when one shows up...

 

[KyleQ]

The hole in the center is for EGR.....at least it is on my factory Lightning intakes.

That is what it is then - do you have to run the EGR stuff?

 

[Hal9000]

Don't really have to, but it doesn't hurt anything. Beyond that, if its running properly, it can actually improve economy.

 

[Scrapper_MV]

I picked up a GT40 5.8 manifold yesterday, it's cast iron. It took some calling around but I found one for a great price at a local boat mechanics shop.

 

[Viperwolf1]

I picked up a GT40 5.8 manifold yesterday, it's cast iron. It took some calling around but I found one for a great price at a local boat mechanics shop.

I'd like to see a picture of that.

 

[Scrapper_MV]

I'd like to see a picture of that.

Here you go.

 

[Viperwolf1]

Nice. I didn't think it would have the EGR port but it does. Looks like a great option for those wanting to EFI the 351w.

 

[gtnorga]

did he have any more?

 

[mattt]

What did the marine engines use for an upper?

 

[Scrapper_MV]

did he have any more?

No, he only had one.

 

[Scrapper_MV]

What did the marine engines use for an upper?

I don't know. The engine that this came off of did not have an upper. I know that OMC made these engines. Actually they just "Marinized" Ford engines. I think Volvo Penta did too. The Volvo pieces are aluminum with bronze inserts at the cooling ports, and are even harder to find than Lightning manifolds. Retail price for the iron OMC uppers is $550 and $1470 for the aluminum Volvos. But you can find used ones for $50-100 if you shop around.

 

[Hal9000]

Thats exactly what the one I got looks like, but if you paid $50 for it I feel like a rube!

Good find.

 

[73azbronco]

Second on that little hole being internal EGR port, just got mine, my old E7 head has the exhaust hole, x303 has none, interesting...

 

[HoosierDaddy]

the IAC is the sensor on your #5 runner
QUOTE]

Unless I have my acronyms messed up , you mean ACT , not IAC.

ACT = air charge temp. sensor
IAC = Idle air control , which is on the TB.
TB = throttle body ;D

 

[73azbronco]

you got the tator, my bad, it is the ACT sensor.

 

[777mechanic]

theres a gt40 on craigslist in denver for 350.00

 

[Goldhawg]

Mike, I have the GT40 setup on a 351 on an engine stand. If you'd like to stop by and measure, you are more than welcome to. I've always been under the impression that the GT40 intake has the lowest overall height. It's usually the truck intake that is too tall.

Can anyone confirm the height of the GT40 lower, explorer upper? Will this fit under stock hood w/no body lift? How does this height compare with the regular truck EFI lower, BC broncos adapter and the mustang upper?

And now that we know a marine intake works, who knows a source for them? You don't have to reveal the source until you buy yours first!

 

[OX1]

I don't know. The engine that this came off of did not have an upper. I know that OMC made these engines. Actually they just "Marinized" Ford engines. I think Volvo Penta did too. The Volvo pieces are aluminum with bronze inserts at the cooling ports, and are even harder to find than Lightning manifolds. Retail price for the iron OMC uppers is $550 and $1470 for the aluminum Volvos. But you can find used ones for $50-100 if you shop around.

They made an iron EFI upper, man that must be one heavy motha. My 94 OMC 5.8 EFI Cobra engine had an alum upper. Only 4 manufacturers used OMC engines in 94, Chris Craft being one of them (I had a 21' cuddy bought new that year). It was rated 270 engine and 255 @ the prop, IIRC.