Re: I think I might have an engine problem...
[Re: Cab_Burge]
#2448083
02/07/18 05:07 PM
02/07/18 05:07 PM
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Joined: Jan 2003
Posts: 5,349 Planet Earth
RoadRunnerLuva
master
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master
Joined: Jan 2003
Posts: 5,349
Planet Earth
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What (if anything) did Brian at IMM say about your engine dilema? You said you took it back to him to have it tuned? HE built it... what was HIS advise to you? You also said you were done with shops... I am assuming he was of no help to you? And BTW his reputation isn't all it's cracked up to be, I have dealt with him in the past myself as a customer, and it didn't end well.
Plymouth Makes It!
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Re: I think I might have an engine problem...
[Re: Porter67]
#2448119
02/07/18 06:03 PM
02/07/18 06:03 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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That dude is weird. He has a face I just can't trust. And the engine was rebuilt by HIM.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: I think I might have an engine problem...
[Re: Porter67]
#2448219
02/07/18 09:54 PM
02/07/18 09:54 PM
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Joined: Jan 2011
Posts: 15,938 Central Florida
larrymopar360
Stud Muffin
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Stud Muffin
Joined: Jan 2011
Posts: 15,938
Central Florida
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That was a really annoying and waste of 2 minutes 4 seconds.
Facts are stubborn things.
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Re: I think I might have an engine problem...
[Re: MuuMuu101]
#2448285
02/08/18 12:45 AM
02/08/18 12:45 AM
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Joined: Dec 2010
Posts: 12,375 SoCal
MuuMuu101
OP
I got lucky at Woodward!
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OP
I got lucky at Woodward!
Joined: Dec 2010
Posts: 12,375
SoCal
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For the record, I wasn't expecting/blaming IMM for building me a broken motor. If it is broken, I probably would have assumed it was my fault anyway. IIRC, IMM set initial timing to about 34 degrees. Unfortunately, Brian forgot to give me cam specs and they seem to be lost. I just know it's something like a 238/242.
Since November, I have been driving the car every weekend. Generally I let the car warm-up for 5-10 minutes and then I go for about a 15-20 minute ride. Generally, when I've been driving, the engine runs between 180-200F for the water temp. So, it has been getting to operating temperature every time I've driven it.
As for the rest, thank you for the advice. I think I'm going to start simple and pull the spark plugs and inspect them whenever I get free time. While I'm at it, I'll change the oil (as it needs it anyway).
When the car was first built, the person who put it together set the fuel pressure to about 8 psi. At my first autocross, I ended up flooding the carb on the first turn 3/4 runs. After that incident I turned the fuel pressure down to 6.5 psi as the youtube video on tuning Holley carbs I watched said 7 psi MAX. I think I may bump it down a little more (5 psi-ish) as, like you're all saying, it seems like its running a little too rich.
I think I'll take it on longer runs on the weekend to the gf's house which is 30 miles one way and generally a 30-40 minute drive.
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Re: I think I might have an engine problem...
[Re: MuuMuu101]
#2448298
02/08/18 01:10 AM
02/08/18 01:10 AM
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Joined: Nov 2004
Posts: 25,050 Texas
GoodysGotaCuda
5.7L Hemi, 6spd
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5.7L Hemi, 6spd
Joined: Nov 2004
Posts: 25,050
Texas
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When the car was first built, the person who put it together set the fuel pressure to about 8 psi. At my first autocross, I ended up flooding the carb on the first turn 3/4 runs. After that incident I turned the fuel pressure down to 6.5 psi as the youtube video on tuning Holley carbs I watched said 7 psi MAX. I think I may bump it down a little more (5 psi-ish) as, like you're all saying, it seems like its running a little too rich.
Adjusting fuel pressure is not the way to lean out a tune. Too much pressure can push fuel past the floats and through the jets. Once you are below that threshold [7psi], you need to be adjusting idle mixture screws and jetting.
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Re: I think I might have an engine problem...
[Re: GoodysGotaCuda]
#2448301
02/08/18 01:18 AM
02/08/18 01:18 AM
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Joined: Dec 2010
Posts: 12,375 SoCal
MuuMuu101
OP
I got lucky at Woodward!
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OP
I got lucky at Woodward!
Joined: Dec 2010
Posts: 12,375
SoCal
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When the car was first built, the person who put it together set the fuel pressure to about 8 psi. At my first autocross, I ended up flooding the carb on the first turn 3/4 runs. After that incident I turned the fuel pressure down to 6.5 psi as the youtube video on tuning Holley carbs I watched said 7 psi MAX. I think I may bump it down a little more (5 psi-ish) as, like you're all saying, it seems like its running a little too rich.
Adjusting fuel pressure is not the way to lean out a tune. Too much pressure can push fuel past the floats and through the jets. Once you are below that threshold [7psi], you need to be adjusting idle mixture screws and jetting. Coolio. I'll watch some youtube videos from Holley to adjust idle mixture screws and jets.
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Re: I think I might have an engine problem...
[Re: MuuMuu101]
#2448488
02/08/18 01:42 PM
02/08/18 01:42 PM
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Joined: Jan 2003
Posts: 2,094 central texas
krautrock
top fuel
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top fuel
Joined: Jan 2003
Posts: 2,094
central texas
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When the car was first built, the person who put it together set the fuel pressure to about 8 psi. At my first autocross, I ended up flooding the carb on the first turn 3/4 runs. After that incident I turned the fuel pressure down to 6.5 psi as the youtube video on tuning Holley carbs I watched said 7 psi MAX. I think I may bump it down a little more (5 psi-ish) as, like you're all saying, it seems like its running a little too rich.
Adjusting fuel pressure is not the way to lean out a tune. Too much pressure can push fuel past the floats and through the jets. Once you are below that threshold [7psi], you need to be adjusting idle mixture screws and jetting. Coolio. I'll watch some youtube videos from Holley to adjust idle mixture screws and jets. first thing i would do is pull the plugs and see if they are black. and also set your float level, mid way up the glass if it has that in the bowls, if it's just a screw, the fuel should be right at the bottom if you pull the screw out, engine idling when you check this... proper idle mix tune won't have the car idling well until it warms up some. tune the idle mix after the motor is completely warm. go around the carb (all four idle screws) screwing them in 1/8th turn (leaner) until the idle stops getting higher and smoother, then maybe richen it up just a touch from there, like 1/16th of a turn on all screws... you can also tune the idle mix for highest vacuum reading instead of RPM. if your plugs are real black. for the jetting, lean it out in small steps. drive down the hwy steady cruise, maybe 2000rpm, once you are too lean you will feel some very subtle surging. from there jet it back up two sizes maybe. because of the power valve in the primary side, the seconday jets will be larger by something like 8 sizes or so. (look up the baseline tune for your carb).
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Re: I think I might have an engine problem...
[Re: MuuMuu101]
#2448520
02/08/18 02:41 PM
02/08/18 02:41 PM
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Joined: May 2003
Posts: 96,666 On The Boat, On The Lake, Wa. ...
amxautox
Still Retired. Still Posting on Moparts. A Lot.
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Still Retired. Still Posting on Moparts. A Lot.
Joined: May 2003
Posts: 96,666
On The Boat, On The Lake, Wa. ...
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And check to see if the power valve is blown.
Tom
"Everyone should believe in something; I believe I'll go fishing."
-Henry David Thoreau
Men and fish are alike. They both get into trouble when they open their mouths
author unknown
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Re: I think I might have an engine problem...
[Re: MuuMuu101]
#2449954
02/11/18 04:30 AM
02/11/18 04:30 AM
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Joined: Jan 2003
Posts: 20,216 Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,216
Park Forest, IL
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The white smoke and the black soot can be as simple as it is pig rich. Rich can cause condensation in the exhaust if it is not driven a lot and burned out. The black soot is just the water washing the carbon out of the pipes.
"Everybody funny, now you funny too."
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