Holley Sniper EFI

[303 Mopar]

The 505 stroker in the Charger has been battling vapor lock at times over the past year or so, and I've been watching and researching all of the EFI offerings.  I considered port injection but could not find a set up that would clear the hood since it slopes down toward the front.  I finally pulled the trigger on the Holley Sniper EFI.

All parts including the Holley tank with in-tank pump, new braided lines with AN fittings, Holley EFI distributor with MSD box to be able to have the system adjust the timing and the Sniper unit with touch screen totaled about $2k. Although I think I could have installed it myself, I had a local speed shop who installs these EFI units all the time and has a dyno do it.  He even did a dyno run with the 850 Proform carb before converting it to get a base line number.

The overall HP and TQ difference was minimal which came in around 441 hp and 530 tq at the wheels.  There was also an 20 degree increase in ambient temp when we ran the EFI to near 100 degrees, plus I'm near 5300' elevation.  Since it is a BB stroker, I'm not concerned about MPH but I'm assuming there is some gain.  However the biggest benefit so far beyond a switch of the key and it fires every time, is the instant response from the throttle.

https://youtu.be/R2F_d9_NoZY

[justcruisin]

Nice, always pleasing after laying down the cash to get a great result. I'm a carb man myself but I can't argue about the benefits an EFI can deliver, good vid too, I was waiting for the smoke scene but.

[Dino]

Any fuel smell with the Sniper system? That's my main issue with carbs. Also, any mechanical noise from under the hood?

[c00nhunterjoe]

Any fuel smell with the Sniper system? That's my main issue with carbs. Also, any mechanical noise from under the hood?

You will always have an exhaust smell unless you put cats on it regardless of the fuel delivery type.

[Dino]

Any fuel smell with the Sniper system? That's my main issue with carbs. Also, any mechanical noise from under the hood?

You will always have an exhaust smell unless you put cats on it regardless of the fuel delivery type.

True, but it's the fuel smell coming from under the hood that gets me.

[c00nhunterjoe]

There shouldnt be any raw fuel odor under the hood. 

[green69rt]

I finally pulled the trigger on the Holley Sniper EFI.

All parts including the Holley tank with in-tank pump, new braided lines with AN fittings, Holley EFI distributor with MSD box to be able to have the system adjust the timing and the Sniper unit with touch screen totaled about $2k.

Did the tank come with a new sender?

[cdr]

I finally pulled the trigger on the Holley Sniper EFI.

All parts including the Holley tank with in-tank pump, new braided lines with AN fittings, Holley EFI distributor with MSD box to be able to have the system adjust the timing and the Sniper unit with touch screen totaled about $2k.

Did the tank come with a new sender?

they are different than the stock sender.
you have to order it.

[cdr]

1

[303 Mopar]

Any fuel smell with the Sniper system? That's my main issue with carbs. Also, any mechanical noise from under the hood?

You will always have an exhaust smell unless you put cats on it regardless of the fuel delivery type.

True, but it's the fuel smell coming from under the hood that gets me.

No fuel smell at all.

[303 Mopar]

I finally pulled the trigger on the Holley Sniper EFI.

All parts including the Holley tank with in-tank pump, new braided lines with AN fittings, Holley EFI distributor with MSD box to be able to have the system adjust the timing and the Sniper unit with touch screen totaled about $2k.

Did the tank come with a new sender?

they are different than the stock sender.
you have to order it.

Correct, I ordered the new tank with in-tank pump and new sending unit already installed.

[c00nhunterjoe]

Any fuel smell with the Sniper system? That's my main issue with carbs. Also, any mechanical noise from under the hood?

You will always have an exhaust smell unless you put cats on it regardless of the fuel delivery type.

True, but it's the fuel smell coming from under the hood that gets me.

No fuel smell at all.

Your exhaust has no odor? Thats incredible. Even modern manufactures with direct injection still need cats to eliminate combustion by products.

[Derwud]

My car use to dump 1200 PPM's of HC at idle.. I would assume a lower number would smell much less like gas!!! 

[c00nhunterjoe]

Sounds like a tuning issue. If it wreaks from the tailpipe, something is not setup properly

[303 Mopar]

Any fuel smell with the Sniper system? That's my main issue with carbs. Also, any mechanical noise from under the hood?

You will always have an exhaust smell unless you put cats on it regardless of the fuel delivery type.

True, but it's the fuel smell coming from under the hood that gets me.

No fuel smell at all.

Your exhaust has no odor? Thats incredible. Even modern manufactures with direct injection still need cats to eliminate combustion by products.

His comment was "fuel smell coming from under the hood". There is no fuel smell under my hood at all.  

[c00nhunterjoe]

My mistake. I thought you were referring to the exhaust odor as well. Still, carb or injected, there should not be raw fuel odors.

[Brass]

Any fuel smell with the Sniper system? That's my main issue with carbs. Also, any mechanical noise from under the hood?

You will always have an exhaust smell unless you put cats on it regardless of the fuel delivery type.

True, but it's the fuel smell coming from under the hood that gets me.

No fuel smell at all.

Your exhaust has no odor? Thats incredible. Even modern manufactures with direct injection still need cats to eliminate combustion by products.

His comment was "fuel smell coming from under the hood". There is no fuel smell under my hood at all.  

Was there any before switching to EFI?  I think what people want to know is whether normal for EFI is less than what is normal for a properly tuned 4 barrel carb.

For me, switching to a dual flow PCV valve reduced under-hood fumes significantly.  I wonder how much, if any, improvement switching to a throttle body EFI would net.

[c00nhunterjoe]

Interesting again. I run no pcv on 2 of mine. Both only have screens for air cleaners. There is zero fumes under the hood. Unless of course i stick my face down the carb, but that seems silly.

[Derwud]

Sounds like a tuning issue. If it wreaks from the tailpipe, something is not setup properly

100k motor with the Mopar 484 Purple shaft cam.. tuned best it could be and maybe 1000 PPM, 1200 was it's daily average...

[303 Mopar]

Any fuel smell with the Sniper system? That's my main issue with carbs. Also, any mechanical noise from under the hood?

You will always have an exhaust smell unless you put cats on it regardless of the fuel delivery type.

True, but it's the fuel smell coming from under the hood that gets me.

No fuel smell at all.

Your exhaust has no odor? Thats incredible. Even modern manufactures with direct injection still need cats to eliminate combustion by products.

His comment was "fuel smell coming from under the hood". There is no fuel smell under my hood at all.  

Was there any before switching to EFI?  I think what people want to know is whether normal for EFI is less than what is normal for a properly tuned 4 barrel carb.

For me, switching to a dual flow PCV valve reduced under-hood fumes significantly.  I wonder how much, if any, improvement switching to a throttle body EFI would net.

There was a little fuel smell but not any different than the other carbureted cars I have owned or been around.  I would say there was a small improvement since there is zero smell now. I would say if you have a strong fuel smell for whatever reason, an EFI would most likely eliminate it.

[Kern Dog]

I'd be interested in knowing some of the benefits you see after driving it a bit.   

[303 Mopar]

I'd be interested in knowing some of the benefits you see after driving it a bit.   

I've driven it a few hundred miles and the biggest benefit by far is throttle response. It has been in the upper 90's here and I've had no issues starting the car, even after it sat for 20-30 min which would've vapor locked before with the carb. The screen allows you to configure from over 180 readouts, so having the tach now that I have not had before is another side benefit.

[c00nhunterjoe]

Glad you are having fun with it. 

[Kern Dog]

I'd be interested in knowing some of the benefits you see after driving it a bit.   

I've driven it a few hundred miles and the biggest benefit by far is throttle response.

Thank you.
Was the throttle a bit soggy before ? Did the carburetor setup leave you with flat spots or lazy response?

[TexasStroker]

Very nice...hope you will continue to enjoy it!

What valve covers are you running?  It looked like they were finned MP units, but with a 440 carved out as well