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Thread: Tap the manifold

Started 1 month, 3 weeks ago by hillbilly deluxe
Any reason a guy couldn't just tap and thread a hole in the exhaust manifold for a pyrometer? I've been reading the closer to the engine the better for accurate EGTs.
Site: CK5 Forums  CK5 Forums - site profile
Forum: GM Diesel  GM Diesel - forum profile
Total authors: 4 authors
Total thread posts: 14 posts
Thread activity: no new posts during last week
Domain info for: coloradok5.com

Other posts in this thread:

DEMON44 replied 1 month, 3 weeks ago
thats exactly where it should be. pre turbo.

kennyw replied 1 month, 2 weeks ago
Just remember, the thicker the better for the location you choose.

hillbilly deluxe replied 1 month, 2 weeks ago
I went to a shop in town and they said it would be fine to tap the manifold. The guy showed me where his is tapped in on his Cummins manifold. The easiest place looks to be the end of the driver's side manifold. EGTs should be the same each side. It'll be at the end of the manifold so it reads all the cylinders.

hillbilly deluxe replied 1 month, 2 weeks ago
There it is. At the end of the driver's side manifold. Also put in boost and fuel pressure. Interesting to drive now. These gauges are much more responsive than I thought they would be. I thought the EGTs would rise and fall slowly, more like the temp of the manifold. Not so, they are all over the place depending how I'm driving. With a little test drive I was able to get the EGTs to 1250 ...

hillbilly deluxe replied 1 month, 1 week ago
I hit 1500 deg running WFO (empty) over Vail (10,554 ft) and Eisenhower (11,112 ft) passes this past Fri & Sat. Went to Banks website and they say 1250 to 1300 is okay sustained . Whadayall runnin? Also, I saw the boost gauge jump to 10 psi a couple times at the top of Eisenhower pass coming back from Denver. Figured the wastegate must have been hot and stuck closed a bit. I have never ...

DEMON44 replied 1 month, 1 week ago
if you pull up high like that often, be wary of the turbo. you can overspeed it very easily at those altitudes. overspeed and the compressor wheel will come apart fast.

hillbilly deluxe replied 1 week, 4 days ago
Thin air? I don't understand how it could overspeed. Shouldn't it be limited by how much exhast comes out? I ran over those passes again last week and drove by the pyrometer. Had to down shift where I hadn't been before. I probably ran 5-10 mph slower watching EGTs.

MaxPF replied 1 week, 4 days ago
Quote: Originally Posted by hillbilly deluxe Thin air? I don't understand how it could overspeed. Shouldn't it be limited by how much exhast comes out? I ran over those passes again last week and drove by the pyrometer. Had to down shift where I hadn't been before. I probably ran 5-10 mph slower watching EGTs....

hillbilly deluxe replied 1 week, 3 days ago
7 psi seems under-boosted to me. The new Fords I drive at work run up to 40 psi stock. I drove semis for a couple years, too, and they all ran 30 or 40 psi. I understand the 6.5 has higher compression though and that has something to do with how much boost can be applied. Not to mention all those vehicles had intercoolers. Intercooling makes alot of sense to me. I was thinking about an ...

MaxPF replied 1 week, 3 days ago
Quote: Originally Posted by hillbilly deluxe 7 psi seems under-boosted to me. The new Fords I drive at work run up to 40 psi stock. I drove semis for a couple years, too, and they all ran 30 or 40 psi. I understand the 6.5 has higher compression though and that has something to do with how much boost can be applied. Not to mention ...

 

Top contributing authors

Name
Posts
hillbilly deluxe
8
user's latest post:
Tap the manifold - Page 2 - CK5...
Published (2009-12-13 03:16:00)
Hey thanks alot for the great info, I eat that stuff up! It's a good post that everybody will find useful. The truck smokes alot but I have yet to replace the injectors and timing chain. I have to "normal up" the motor before I apply any expirimentation just so I can sleep right.
MaxPF
3
user's latest post:
Tap the manifold - Page 2 - CK5...
Published (2009-12-12 01:29:00)
Quote: Originally Posted by hillbilly deluxe 7 psi seems under-boosted to me. The new Fords I drive at work run up to 40 psi stock. I drove semis for a couple years, too, and they all ran 30 or 40 psi. I understand the 6.5 has higher compression though and that has something to do with how much boost can be applied. Not to mention all those vehicles had intercoolers. Intercooling makes alot of sense to me. I was thinking about an adjustable...
DEMON44
2
user's latest post:
Tap the manifold
Published (2009-11-08 23:59:00)
if you pull up high like that often, be wary of the turbo. you can overspeed it very easily at those altitudes. overspeed and the compressor wheel will come apart fast.
kennyw
1
user's latest post:
Tap the manifold
Published (2009-11-02 12:41:00)
Just remember, the thicker the better for the location you choose.

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