Go Back   US MUSCLE US Muscle Forum Technical Discussion
User Name
Password


Reply
 
Thread Tools Display Modes
  #1  
Old 05-12-2018, 11:40 AM
GDBST1 GDBST1 is offline
Junior Member
 
Join Date: Mar 2014
Location: Melbourne
Posts: 29
Unburnt Fuel smell (EFI the answer?)

Hi All,

Im getting constant complaints from my wife that she smells like fuel everytime she comes in the Camaro.

I've been doing some research and have had mixed answers on whether going from a carb to an EFI system such as FiTech or Holley Sniper might help the issue.

The car has a fairly lumpy cam 238/242 @ 50 (383 stroker) and has been tuned fairly recently.

Has anyone had any experience with these and noticed a significant enough difference with the smell to justify the 2-3k expense?

Cheers.
Reply With Quote


Find this Ad annoying? Want it removed? Then register now!.. It's FREE! Click HERE.
  #2  
Old 05-12-2018, 01:01 PM
Frenchy666's Avatar
Frenchy666 Frenchy666 is offline
Senior Member
 
Join Date: Mar 2014
Location: Kalgoorlie, WA
Posts: 104
Name: Marc
maybe its just running rich??

Do u have a standard vented tank?? perhaps u may need to hook up a charcoal type cannister??

A few guys on here have hooked up the Sniper system, but if your not having any running issues with the carb maybe just get either a new wife or a clothes peg for her nose.... ha ha.....
__________________
502BBC + 5spd Tremec = whole lot of Smiles per Gallon.....
"You can't put brains in monuments"
Reply With Quote
  #3  
Old 05-12-2018, 01:45 PM
GDBST1 GDBST1 is offline
Junior Member
 
Join Date: Mar 2014
Location: Melbourne
Posts: 29
it'll be running a bit rich but im guessing its tuned correctly.

have you got any more info on the charcoal cannisters? i havent heard of them?

Prefer not to spend the 2-3k as the carby's running well, no issues with cold starts etc...

no wife.....yeh dont think that'll work :S
Reply With Quote
  #4  
Old 05-12-2018, 02:55 PM
Frenchy666's Avatar
Frenchy666 Frenchy666 is offline
Senior Member
 
Join Date: Mar 2014
Location: Kalgoorlie, WA
Posts: 104
Name: Marc
My issue was the fuel smell in the garage with it not running and just sitting there. I hooked up a charcoal canister and pretty much halved the amount of smell in the garage. I just made one up myself and used activated charcoal (from pet store - for fish tanks) and ran a hose from the fuel tank through a bulkhead above the diff and into the trunk. Attached it to the canister then ran it back out a separate bulkhead fitting.

All new cars run some form of vented fuel tank for emissions (that's why none stink out your garage).... may not fix the problem but at least it is a big enough band aid to help ease the MRS...
__________________
502BBC + 5spd Tremec = whole lot of Smiles per Gallon.....
"You can't put brains in monuments"
Reply With Quote
  #5  
Old 05-12-2018, 03:33 PM
GDBST1 GDBST1 is offline
Junior Member
 
Join Date: Mar 2014
Location: Melbourne
Posts: 29
Maybe I'm explaining it wrong.

It doesn't smell just when it sits there not running. When the cars running, the exhaust fumes are pretty bad. I'm guessing it's pretty normal for an old school car.

I've had a worked LS motor that didn't have the same issue and thought maybe switching to EFI could help.
Reply With Quote
  #6  
Old 05-12-2018, 04:41 PM
bonnevista's Avatar
bonnevista bonnevista is offline
Senior Member
 
Join Date: May 2010
Location: Wollongong
Posts: 739
Name: Chris
Just my view, I think it's just your car. Years ago, (almost) every single car on earth was carbed and the world didn't stink of petrol. None of my cars ever have...
__________________
I had a great childhood, I just didn't think it would last this long.
Reply With Quote
  #7  
Old 05-12-2018, 05:16 PM
rodent's Avatar
rodent rodent is offline
Moderator
 
Join Date: Feb 2007
Location: Sunbury
Posts: 3,999
Name: Jim
Quote:
Originally Posted by bonnevista View Post
Just my view, I think it's just your car. Years ago, (almost) every single car on earth was carbed and the world didn't stink of petrol. None of my cars ever have...
^^^^Quoted for truth.

Get it tuned properly and move on....your wallet will thank you in the long run


Does your girlfriend complain about the fumes also? No girlfriend? Now's the time
__________________
An unbreakable toy, is useful for breaking other toys.
Reply With Quote
  #8  
Old 05-12-2018, 06:55 PM
Frenchy666's Avatar
Frenchy666 Frenchy666 is offline
Senior Member
 
Join Date: Mar 2014
Location: Kalgoorlie, WA
Posts: 104
Name: Marc
Quote:
Originally Posted by GDBST1 View Post
Maybe I'm explaining it wrong.

It doesn't smell just when it sits there not running. When the cars running, the exhaust fumes are pretty bad. I'm guessing it's pretty normal for an old school car.

I've had a worked LS motor that didn't have the same issue and thought maybe switching to EFI could help.
i understood what you were saying, i was telling you my problem with fuel smell and how i fixed that one.

As everyone has said, tuning seems to be the issue.....
__________________
502BBC + 5spd Tremec = whole lot of Smiles per Gallon.....
"You can't put brains in monuments"
Reply With Quote
  #9  
Old 05-12-2018, 07:19 PM
Nev68's Avatar
Nev68 Nev68 is offline
Senior Member
 
Join Date: Jul 2008
Location: Oz
Posts: 6,011
I had a similar issue after fitting my engine in my Camaro.
I had the engine dynoed before fitting it and tuned for power but I could not idle in the shed without my eyeballs burning out of their sockets....and my bride complaining alot.
Long story short, had it all sorted by a competent person who knew their way around carb's and set the idle up nicely.
My eyeballs are OK now, bride is happy, car runs like a gem....happy ending.

Mind you I would like some efi one day....maybe when I "LS" it
__________________
Nev

CAUTION. Will spontaneously talk cars
Reply With Quote
  #10  
Old 05-12-2018, 07:56 PM
Geoff 4 Geoff 4 is offline
Senior Member
 
Join Date: Apr 2016
Location: Australia
Posts: 243
Name: Geoff
That is a sizeable cam for that size engine, so with a carb, expect to have some smell from the exh.

You firstly need to optimise the fuel burn at idle. Try this simple test & report back with the results.

Warm up engine & keep it idling. If auto, put into gear & chock the wheels. Slowly advance the timing by turning the dist [ CCW for a Chev ]. When highest idle rpm is reached, stop & check what the timing is. Do not be surprised if it is 30-50 degrees with that cam.

Also, what carb is on the engine?
Reply With Quote
  #11  
Old 06-12-2018, 09:04 AM
GDBST1 GDBST1 is offline
Junior Member
 
Join Date: Mar 2014
Location: Melbourne
Posts: 29
Definitely an eyeball burning experience when its idling in the garage.
Its a got a holley 750 on it.
I did get it tuned down at powerup performance in moorabbin after some guys on here recommended them and it ran heaps better after taking it down there.
Anyone have any other good tuners in melbourne south east?

Thx Geoff, ill give that a shot!
Reply With Quote
  #12  
Old 06-12-2018, 04:36 PM
rodent's Avatar
rodent rodent is offline
Moderator
 
Join Date: Feb 2007
Location: Sunbury
Posts: 3,999
Name: Jim
Quote:
Originally Posted by Nev68 View Post
Mind you I would like some efi one day....maybe when I "LS" it
__________________
An unbreakable toy, is useful for breaking other toys.
Reply With Quote
  #13  
Old 06-12-2018, 07:05 PM
Nev68's Avatar
Nev68 Nev68 is offline
Senior Member
 
Join Date: Jul 2008
Location: Oz
Posts: 6,011
Quote:
Originally Posted by rodent View Post
I need a hug now
__________________
Nev

CAUTION. Will spontaneously talk cars
Reply With Quote
  #14  
Old 07-12-2018, 02:48 PM
68ls1's Avatar
68ls1 68ls1 is offline
Senior Member
 
Join Date: Jan 2008
Location: Melbourne
Posts: 1,372
Name: Roger
Might need a vent

https://www.iimuch.com/collections/f...erential-vents
__________________
Roger

68 Camaro Convertible LS1 6 speed
72 C10 SWB Stepside old skool 350
70 Camaro RS LS3 6 speed
Reply With Quote
  #15  
Old 07-12-2018, 10:26 PM
69JavelinMan 69JavelinMan is offline
Senior Member
 
Join Date: Nov 2012
Location: Perth
Posts: 701
Name: Darren
Also look for things like oil leaking onto exhaust, most old cars leak either engine or transmission oil and if you have an x-pipe in your exhaust system, guess where it ends up and then smokes out the cabin as it burns off.

Also crankcase ventilation can be an issue, faulty or no PCV can have fumes exiting where you don’t want them.

Also look at seals around the rear of the car like a bad boot seal that might allow exhaust fumes back into the car.

EFI possibly solves the problem since it can tune itself and not have an excessively rich mixture under any conditions.

I have a similar issue and haven’t managed to solve it yet.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT +10. The time now is 08:23 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Ad Management plugin by RedTyger