The other day I was helping my dad and his friend diagnose a big block engines carburetor as it sounded and drove like it wasn't using all 8... So for ***** and grins I took a non contact IR thermometer and started to measure the temp of each header coming off the engine block. It turns out 2 of them on opposite sides were noticeably colder. We switched plugs on these to determine if the plugs were bad.

Anyway this got me thinking I pointed this device at my headers on my h22 and looking at the block from the front of the car, the 3rd cylinder from the left was around 100 degrees colder....

Anyone know why this is? does it have to do with the JDM h22a stock manifold?

I would think either the first or the last cylinder would be colder/hotter then the rest..... but the middle one just is confusing as hell....unless that 3rd cylinder needs to be corrected on individual cylinder trim...

i'm baffled.

--Aaron

 

Bump

 

I have also noticed this on My B series. It runs great but there is deff. a Temp difference between Header Runners.

 

Well for ***** and grins get it up to operating temp and post the numbers from left to right.

is this a tuned engine? or oem tune or what?

I was thinking of playing with fuel trim on the hot cyl and see what happens.