Great video, have you ever installed the new in-tank Holley 255 LPH OEM Style EFI Fuel Tank Modules (12-304) that has the in tank fuel pressure regulator, and any servicing to the pressure regulator similar to the one you show on this great video. thanks
I just purchased the Holley Sniper Stealth 4150 for my 421 SBC. I had the Edelbrock pro flo 4 on my old tired 350. What are your thoughts on both? I really liked the Pro flo adjustability. I sold both the old 350 with the Pro flo and I’m will be using the sniper stealth model with the timing controlled Hyperspark distributor and I’m looking for input on it. Phew that was a lot.
Both work great! I find the pro flo is abit more simple for adjustments. The sniper is also fairly simple setup but can be abit more difficult to fine tune. Most engines need very basic changes but some will need more fine tuning on hot and cold starts. The sniper is also abit more versatile
Most guys notice right away how much better the throttle response is with the sniper and obviously drivability is way better. As far is HP there's really no difference as long as the carb was working and sized correctly beforehand. But alot of carbs are not set up, jetted or working properly so most guys will feel a power difference
Really not happy with my sniper. My sniper has less that 500km and has left me stranded multiple times. Holly is no help. Most recently my car started backfiring/lost power. Now can only get it to start while pressing my pedal with half throttle. Maybe this is my issue. Holly told me on the phone it’s ignition related. However my car runs if I dump fuel down the tbi. At this point might just have to go back to carb and take this as a 3500$ lesson unfortunatly. Really havnt seen anyone else with this issue
Yeah thats weird one, have you checked fuel pressure by chance? I find alot of the time its a mechanical problem, fuel pressure or vacuum leak causing issues but guys will think its the sniper. Feel free to email me at pcperformance1@outlook.com if you have any questions. Ive installed quite a few of these systems
Thanks for that info.
I've not had any problems with mine. But it's good to know that it can be removed and cleaned fairly easy.
This was my issue- Thank you!
Great video, have you ever installed the new in-tank Holley 255 LPH OEM Style EFI Fuel Tank Modules (12-304) that has the in tank fuel pressure regulator, and any servicing to the pressure regulator similar to the one you show on this great video. thanks
I just purchased the Holley Sniper Stealth 4150 for my 421 SBC. I had the Edelbrock pro flo 4 on my old tired 350. What are your thoughts on both? I really liked the Pro flo adjustability. I sold both the old 350 with the Pro flo and I’m will be using the sniper stealth model with the timing controlled Hyperspark distributor and I’m looking for input on it. Phew that was a lot.
Both work great!
I find the pro flo is abit more simple for adjustments. The sniper is also fairly simple setup but can be abit more difficult to fine tune. Most engines need very basic changes but some will need more fine tuning on hot and cold starts.
The sniper is also abit more versatile
I don't know if it matters but you put that cover back clocked wrong
It does not matter but good eyes!
Dude we really don't use those so I'm curious what is the trade-off as far as performance?
Most guys notice right away how much better the throttle response is with the sniper and obviously drivability is way better. As far is HP there's really no difference as long as the carb was working and sized correctly beforehand. But alot of carbs are not set up, jetted or working properly so most guys will feel a power difference
I run a 340lph in tanks pump and have no issues with sniper regulator.
Have you ever seen one of these not hold fuel pressure well? Opposite of too.much pressure
Like leak down after shut off? Or not maintain proper pressure?
Do you recommend the Sniper EFI?
Yeah or the atomic 2 efi (basically the same thing)
Been thinking about getting one 🤔 but I see and hear so many problems with efi
There are issues but ive installed alot without any issues.
I run a sniper on my daily
YUP !!!!! NOTHING BUT ISSUES !!!! CARBERATOR IS FAR MORE RELIABLE !!!! LOL !!!!
Having trouble re-installing the regulator, any tips?
Did you try abit of lube on the o-ring?
Thanks, will try a bit of lube.
Really not happy with my sniper. My sniper has less that 500km and has left me stranded multiple times. Holly is no help. Most recently my car started backfiring/lost power. Now can only get it to start while pressing my pedal with half throttle. Maybe this is my issue. Holly told me on the phone it’s ignition related. However my car runs if I dump fuel down the tbi. At this point might just have to go back to carb and take this as a 3500$ lesson unfortunatly. Really havnt seen anyone else with this issue
Yeah thats weird one, have you checked fuel pressure by chance? I find alot of the time its a mechanical problem, fuel pressure or vacuum leak causing issues but guys will think its the sniper.
Feel free to email me at pcperformance1@outlook.com if you have any questions. Ive installed quite a few of these systems