Archive for Engines, Exhaust and Fuel Systems

Aug
11

Engine decode 340 /360!!??

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Any ideas on how to work out if this engine is a 340 or 360 (73 Challenger)

I have tried a lot of the decoding sites but no joy

The plate below the white sticker and bar code has the numbers 2211 and then 469923

Any help on identifying the engine type and year would be much appreciated


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Aug
08

Headers and exhaust

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Looking for header suggestions, 1969 B-body w/power steering. I presently have a set of very old Doug Thorleys. They are past there prime, v.v.v.old. Looking for quality of build, easy access to all plugs , and in this case clearence around power steering box. Not looking to break the bank on headers ,....but ....not cheap *** set either. Also, advice on size of piping from collector to tail pipe, 2 1/2 or 3". Thanks in advance for any help offered.
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Jul
31

head gasket question

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I have an 86 318 that I am fixing to do the heads on. I know that the head gasket on that engine has a blocked water port on the passenger side to bring the heat up for all the smog crap - I have all of that stuff unhooked at this point - my question is - has anyone ever drilled the gasket to allow the water to flow thru like the older 318s ? - I can not see a problem with doing this but would welcome any input you may have. thank you - jack
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Jul
29

318 poly will not start but if you shoot carb cleaner or engine starter it does

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I have no clue what could be the problem and was wondering if any of you would know an answer to it. The starter and everything is good we think it might be a block in the fuel line but not sure. It’s a 54 year old engine that’s never been rebuilt.
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Jul
22

EGR Valve stem not closing all the way

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How tight should the valve stem be on the EGR valve? Is it supposed to be air tight? My engine idles low and I have low vacuum. While I was looking for a vacuum leak, I sprayed carb cleaner a the base of the valve stem on the EGR valve and the idle and vacuum jumped up. I can see the valve open and close properly when I increase the RPM, so I know the valve is working properly, but I suspect the valve stem may not be seating properly.
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Jul
20

Jeep 4.0 upgrades

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We stripped the block for my brothers XJ and sent it to the machine shop to be prepped for his stroker build. Unfortunately the block would need to be sleeved to fit the piston kit he ordered. Fortunately we have the block we originally pulled out of his truck and got it stripped down to go to machine shop for his build. Now we have an extra block stripped down at machine shop and would like to try and pull some reliable power and torque out of it without stroking it. Have read too many horrors about keeping a stroker bored 40 over cool. We have an RV cam for it that brought some life to a stock 30 over motor but no dyno runs to know where it was. We also have found some bolt on upgrades for the top end including heads, manifold and throttle body. Any thoughts on what we can achieve for power numbers with the 4.0? Where can we make more torque? What type of compression should we be looking at? What compression if we were to add a supercharger? Keep in mind we live at 5400 ft elevation and frequently take these to 12-13k ft.
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Jul
20

What is “Lean Burn”

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I have a Holley 6280 carb and I keep hearing the term "lean burn". What is it and how do I know if I have it? From what I understand it is a small computer located on the air cleaner housing.
My van is a 1985 B250. Engine is 318.
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