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modified 351 question
#1
i have a built 351 and most the time i drive it i feel like im getting choked out by the exhaust fumes. the car is bare metal other than the dash a little carpet and front seats. even people driving behind me on the road can wiff it. having it idle in my driveway stinks up my front yard too. i dont have any exhaust leaks(i had it checked). im just wondering if these motors are characteristic of that or is it because i dont have interior panels in? or could it be something entirely different?
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#2
72mach0ne;20393 Wrote:i have a built 351 and most the time i drive it i feel like im getting choked out by the exhaust fumes. the car is bare metal other than the dash a little carpet and front seats. even people driving behind me on the road can wiff it. having it idle in my driveway stinks up my front yard too. i dont have any exhaust leaks(i had it checked). im just wondering if these motors are characteristic of that or is it because i dont have interior panels in? or could it be something entirely different?

Just sounds like its running rich. Tune the carb. and make it run a little leaner.

[Image: 25rnz1y.jpg]

~Buddy
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#3
X2 on running rich.Had the same problem tuned the carb ok now.
Jim

drive it like you stole it
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#4
thanks all. that was goiing to be my first test. its also a double pumper not a vac secondary, that may be part of it too
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#5
Our carbureted cars will not idle or run as clean as the EFI engines we currently are used to. They idle and run richer because they are not as efficient. No matter how much we tune the carbs they will have rich smelling exhaust fumes unless it is converted to fuel injection.

Jeff T.

Low buck, touring style, '73 Convertible "rolling restoration", 351c, 2v heads with a shave and a haircut, Performer intake, Holley 650(ish), roller rockers, screw in studs, guideplates, stainless valves, Duraspark / Motorsports MSD, T-5 conversion. 1-1/8" front, 3/4" rear swaybars KYB shocks and some home brewed subframe connectors. Future plans; JGC steering box, Cobra brakes and... paint, interior, etc.

When I die I want to die like grandpa, peacefully in my sleep... not screaming, like his passenger.

[Image: 1_12_09_14_10_15_11.png]
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#6
go over the carb and give it a good tune, tune the air fuel ratio screws, power valve size, etc.. just go over it all and make sure the carb isnt too big for the motor as well

Executioners Racing
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#7
I agree, it is running too rich. Double pumper vs vacuum secondary should not make a difference at idle. What size is carb?
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#8
here you go

http://www.dragcorp.com/category.sc?categoryId=270
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#9
Tnfastbk;20590 Wrote:here you go

http://www.dragcorp.com/category.sc?categoryId=270

Amazing, I wonder if it works on "other" kinds of "natural" gas Exclamation Kinda pricey though
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#10
Wow that is cool, I'm ordering some now.

[Image: attachment.php?aid=2111]

My mustang is named Beth.

As in

Beth I hear you calling and I'll fix you right this time.
but both the kids need braces and I just can't spare a dime.
Just a few more paychecks and I'll get right back to you.
Oh Beth what can I do? Beth what can I do?
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