325-350 HP 360....is a stock mechanical fuel pump adequate?

[Kern Dog]

I need a fuel pump for a 1990 360 that will be going in my 67 Dart in a couple of weeks.
I have no dyno sheets for the engine but I'm hoping that it makes at least 325 HP.
1990 360, .040 over, KB 107 pistons, #308 heads. 9.48 to 1 compression. Air Gap intake, Holley 750 VS 4 barrel. Hughes cam .544 lift, 218/228 duration on a 110 LSA.
I've used stock fuel pumps in milder builds and never had starvation issues.
What are you using for similar builds?

 

[DartGT55]

I need a fuel pump for a 1990 360 that will be going in my 67 Dart in a couple of weeks.
I have no dyno sheets fort the engine but I'm hoping that it makes at least 325 HP.
1990 360, .040 over, KB 107 pistons, #308 heads. 9.48 to 1 compression. Air Gap intake, Holley 750 VS 4 barrel. Hughes cam .544 lift, 218/228 duration on a 110 LSA.
I've used stock fuel pumps in milder builds and never had starvation issues.
What are you using for similar builds?

Holley fuel pump on mine no fuel problems

 

[RustyRatRod]

Yes.

 

[MidnightSwinger]

The only thing I don’t like about the stock pumps is the reliability. I’ve had 3 carters go out in two separate applications within the past three years.

The most recent one was a failure at the pump to carb fitting that cracked/failed within a few miles of use. That’s in my 62 Lancer slant six where space is limited and it’s a bear to get back in there. Luckily the Carter carries a lifetime warranty at Oreillys where I bought it.

I’ve been considering the Holley/Edelbrock aftermarket options for the 5.9 in the Demon. I’d rather not swap pumps out every year.

 

[Kern Dog]

Summit shows no listing for a Holley LA/Magnum mechanical pump but they do have them for the B/RB.

I saw this....

If the O'Rielleys have these, it would make things easier for any warranty returns...

 

[Michael Siple]

plenty adequate - some should have a regulator depending what pressure your carb wants -

 

[DartGT55]

Summit shows no listing for a Holley LA/Magnum mechanical pump but they do have them for the B/RB.

I saw this....

View attachment 1716496590

If the O'Rielleys have these, it would make things easier for any warranty returns...

My bad forgot it’s a Carter like you have shown M6866 had to go look on motor sorry my bad but haven’t had any problems out of it it seems to work fine

 

[Kern Dog]

plenty adequate - some should have a regulator depending what pressure your carb wants -

I doubt any counterman would be able to tell if the 7 psi number is the max or what it is at all times. I've had many pumps put out 3-4 at idle and shoot up to 6 or 7 as RPM increases.
The Carter in a 440/495 pf mine idled at 11 ! For that, I did use a regulator and return line. It idles around 3.5 but shoots to 7 and stays there until I drop RPMs, just like a lower performance pump except that it returns everything over 7 PSI back to the tank. It absolutely cured the vapor lock issues I had.
This Dart currently has a 360 of maybe 280 HP and even with stock pumps, it has never faltered. 4.10 gears and off road drifting at 3000-4000 rpms and it has not stumbled or sputtered.

 

[RustyRatRod]

The only thing I don’t like about the stock pumps is the reliability. I’ve had 3 carters go out in two separate applications within the past three years.

The most recent one was a failure at the pump to carb fitting that cracked/failed within a few miles of use. That’s in my 62 Lancer slant six where space is limited and it’s a bear to get back in there. Luckily the Carter carries a lifetime warranty at Oreillys where I bought it.

I’ve been considering the Holley/Edelbrock aftermarket options for the 5.9 in the Demon. I’d rather not swap pumps out every year.

That's cause they ain't made here anymore. Guess where?

 

[273]

Hp x .08 = gph
350 hp x .08 = 28 gph

 

[TF360]

Summit shows no listing for a Holley LA/Magnum mechanical pump but they do have them for the B/RB.

I saw this....

View attachment 1716496590

If the O'Rielleys have these, it would make things easier for any warranty returns...

I have that on my 360 and it works great

 

[318willrun]

I need a fuel pump for a 1990 360 that will be going in my 67 Dart in a couple of weeks.
I have no dyno sheets fort the engine but I'm hoping that it makes at least 325 HP.
1990 360, .040 over, KB 107 pistons, #308 heads. 9.48 to 1 compression. Air Gap intake, Holley 750 VS 4 barrel. Hughes cam .544 lift, 218/228 duration on a 110 LSA.
I've used stock fuel pumps in milder builds and never had starvation issues.
What are you using for similar builds?

you'll be fine, if you are talking a 1/4 mile race anyways. I have a normal factory style fuel pump using the factory 5/16 fuel line and no issues. I too don't know what my actual HP rating is either, but it's gotta be around what you are suggesting. Both my duster and truck are set up this way.

 

[fishmens67]

350 hp x .08 = 28 gph

@ 5200rpm. or over a 100 mph. lol
A stock pump will be more than adequate for 350 hp.

 

[MidnightSwinger]

That's cause they ain't made here anymore. Guess where?

It’s a shame because you are paying more for the Carter name, but it’s just another sticker slapped on a white box.

 

[273]

@ 5200rpm. or over a 100 mph. lol
A stock pump will be more than adequate for 350 hp.

Never said it wouldn't just ruffly how much gph he needs, if a stock fuel pump has that covered kewl.

 

[mopowers]

I need a fuel pump for a 1990 360 that will be going in my 67 Dart in a couple of weeks.
I have no dyno sheets fort the engine but I'm hoping that it makes at least 325 HP.
1990 360, .040 over, KB 107 pistons, #308 heads. 9.48 to 1 compression. Air Gap intake, Holley 750 VS 4 barrel. Hughes cam .544 lift, 218/228 duration on a 110 LSA.
I've used stock fuel pumps in milder builds and never had starvation issues.
What are you using for similar builds?

If you can get a quality stock pump, I think you'll be fine.

A couple more data points for you.

My dad and I built a mild 408 for my Duster when I was in high school. It had stock 360 heads, 234/244 .488/.510 on a 112* LSA HFT cam, air gap intake, 1850 Holley (it's all I had at the time). I took it out regularly to Sac raceway on Wednesdays nights and ran 12.70s on 2.-something sec 60' times and never had an issue on the big end with the stock fuel pump.

The 340 currently in my '68 Dart had a stock pump for a while too and never had a fuel supply issue. It's got iron RHS heads, 231/.560/108* HFT cam, yada yada. Runs well for what it is - it's also run traction-limited 12's at the track with the stock pump. I only swapped fuel pumps when I replaced the front seal a while back because I had a 'better' mechanical pump on the shelf that I wanted to try. The only fuel system issue I've had since replacing the pump is a minor vapor lock issue solved with istalling a length of insulation wrap on the stock metal fuel line near the header.

 

[TT5.9mag]

Buy once cry once. I’ve used this pump up to 550hp. I currently have one on my magnum in the D100 and it keeps up with the 360hp small block just fine. And I spray 100 shot on that. I like having too much fuel volume instead of not enough.

https://www.edelbrock.com/performer...JbRYkzDPE-lgRSWwXBLl_Erhjw_eMr6nZYVCvXBj_SFB5

 

[MidnightSwinger]

Buy once cry once. I’ve used this pump up to 550hp. I currently have one on my magnum in the D100 and it keeps up with the 360hp small block just fine. And I spray 100 shot on that. I like have too much fuel volume instead of not enough.

https://www.edelbrock.com/performer...JbRYkzDPE-lgRSWwXBLl_Erhjw_eMr6nZYVCvXBj_SFB5

That’s the one I have been considering.

 

[TT5.9mag]

That’s the one I have been considering.

I’ve never been let down by one. Knock on wood.

 

[Dartsun]

Yep been running stock fuel pumps on my blueprint 408 over 15 years. Just parts store junkers.

 

[Michael Siple]

Check Mancini - they had a nice display of fuel pumps @ last years Carlisle,

 

[Kendog 170]

I bought this carter pump just to get my ride running with the intent of upgrading on my 340. 4 years later lol still going strong knock on wood.
More Information for CARTER M6866

 

[abodyjoe]

I need a fuel pump for a 1990 360 that will be going in my 67 Dart in a couple of weeks.
I have no dyno sheets for the engine but I'm hoping that it makes at least 325 HP.
1990 360, .040 over, KB 107 pistons, #308 heads. 9.48 to 1 compression. Air Gap intake, Holley 750 VS 4 barrel. Hughes cam .544 lift, 218/228 duration on a 110 LSA.
I've used stock fuel pumps in milder builds and never had starvation issues.
What are you using for similar builds?

ran a stock pump for years in my old yellow dart. IIRC according to the time slips the 360 was at around 350 hp. 12.20's in the quarter. never had any fuel supply issues.

 

[FJB SHOCKS LLC]

No matter what is said about flow and pressure, too much is just about right. Put a pressure gauge on the car right in front of carb or fuel injection rail. And record it if you can?
If at ANY point in a run with a carb, the pressure drops below 25PIS in front of the pressure regulator (and that regulator better be in front of the carb somewhere) you ARE RUNNING out of fuel. I've proved this way too many times on different cars. On a 65 Dodge Cornet big block running low 9s, we found this out the hard way. After the fix, 35 PSI up to the regulator (down to 25 PSI midway 1/4 mile run) then regulated to 7 PSI big Holly Dominator,
picked up 3 MPH and 2.2 ET. 5/8 ID line to regulator (it was a triple bypass system) then -10 fuel lines to carb. (Think needle and seats opening and closing at least 20 tines in 9 seconds) Recording this proves this info.
FJB

 

[Kern Dog]

No stock mechanical fuel pump generates 25 PSI. No 350 HP carbureted engine needs 25 PSI either.
Come on, man....