jeepman121
NAXJA Forum User
- Location
- Ohio
Is there a reason Jeep did this?? The colder your intake temp is the better the performance.....there is plenty of room on the other side of the block. Why??:dunno:
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Why is the exuast Manifold below the intake??
- Thread starter jeepman121
- Start date
winterbeater
NAXJA Forum User
- Location
- Royal Oak, Michigan
Cheaper, Jeeper!
joe_peters
NAXJA Forum User
- Location
- Grants Pass, OryGun
It's because the engine design dates back to the Nash. Inlines aren't immense power motors, and casting the ports all on one side allows a single gasket to seal it. In the days of carburetors, it was also easy to heat the underside of the intake with the exhaust to promote vaporization. With MPFI, it's not necessary as much. It also makes placing and routing the distributor easier.
The Dodge Slant Six, Ford 200 and 300, Chevy 250, etc all used the same side of the head, IIRC. And yes, it isn't the technically superior way to do it for high horsepower - but a Jeep isn't for that. High velocity cross flow heads aren't optimal on low revving torque spinners.
The Dodge Slant Six, Ford 200 and 300, Chevy 250, etc all used the same side of the head, IIRC. And yes, it isn't the technically superior way to do it for high horsepower - but a Jeep isn't for that. High velocity cross flow heads aren't optimal on low revving torque spinners.
dagr8tim
NAXJA Forum User
- Location
- Columbus, Oh
Honestly, if it bothers you that much. Heat shields aren't that hard to fab up. I've see them with a small duct work that blows air down between the heat shield and the exhaust manifold.
As stated above, the inline 6 in your Jeep wasn't designed to be a high performance engine, so alittle heat sink is acceptable.
As stated above, the inline 6 in your Jeep wasn't designed to be a high performance engine, so alittle heat sink is acceptable.
winterbeater
NAXJA Forum User
- Location
- Royal Oak, Michigan
Too bad it makes the fuel in the injectors and fuel rail percolate on the later models after the Cheepened it more and removed the fuel return line. The famous "hot restart" problem.
Somebody (GoJeep? Dino?) has a block off plate dimensions on their website. Basically cut tin to fit and jam in between the intake and exhaust to reduce temps. At idle, they claimed as much as a 40* reduction, and at least 10* at 60mph.
Anybody below the Mason-Dixon line would probably benefit.
Some folks are using high temp spark plug boots on the injectors to reduce heat soak.
Anybody below the Mason-Dixon line would probably benefit.
Some folks are using high temp spark plug boots on the injectors to reduce heat soak.
jeepman121
NAXJA Forum User
- Location
- Ohio
That's why I'm ranting...Every time I restart after chugging up a long, steep Appalachian trail it runs terrible for abut 10 seconds...
jeepman121
NAXJA Forum User
- Location
- Ohio
Thanks:thumbup:
winterbeater
NAXJA Forum User
- Location
- Royal Oak, Michigan
The most common improvement to try to minimize this problem is a manual switch or timer to run the aux. fan after shutdown. This seems to work well.
hubs97xj
NAXJA Forum User
- Location
- Fort Wayne, IN