KPM1000 issue and suggestions

766 Views 22 Replies 5 Participants Last post by a6d9cmro, 7 d ago

mike929

Discussion Starter · 15 d ago

2

Issue - over 5k RPM I'm not getting more fuel pressure. Prior to this issue, if the car sat overnight it would not start on the first try. It would not the second attempt.

Builder is contacting KPM to see what they have to say. I have posted this issue within Facebook groups and I'm hearing others that had issues and they got no support from KPM. My unit is less than a year old.

If I have to go with something else. Looking for suggestions. My builder like dsx aux pump. I didn't go that route due to tapping the tank. KPM is a drop in solution. However I might be open to whatever at this point. I heard of issues with manual cars and dsx, anyone had issues?

Car info - I'm over 700hp
2016
Manual,
MGW Shifter,
SLIHRM,
Whipple w3.75 pulley,
Monster Triple clutch,
E85,
FIC1200,
KPM1000,
PNP Frostbite - newly installed
CTS-V Sedan wheels / PS4 tires,
PRC Ported heads,
TSP Stage 2 cam,
upgraded internals / CHE,
RotoFab,
Maloo skirts - newly installed
Commodore specialties spoiler(on order)

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1 - 20 of 23 Posts

mike929

Discussion Starter · #2 · 15 d ago

Shop just rolled the car again showing the fuel pump commanded 100% duty cycle

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a6d9cmro

· #3 · 15 d ago (Edited)

I don't think the KPM1000 is enough pump for your setup, especially on E85. Their website says "This equates to optimum tuning and power levels up to 1000hp (flywheel rated on 98 octane fuel)." So, 1k on 92/93, maybe 750ish on E...

That being said, I put a manual gauge on the fuel rail to make sure you are getting pressure or not...that should help with troubleshooting...

mike929

Discussion Starter · #4 · 15 d ago

a6d9cmro said:
I don't think the KPM1000 is enough pump for your setup, especially on E85

I didn't have an issue until now. When the car was originally tuned everything was good.

a6d9cmro

· #5 · 15 d ago

mike929 said:
I didn't have an issue until now. When the car was originally tuned everything was good.

What changed? I'm a manual car and ran a stock pump with a DSX unit. Made 880/ 770ish on E75 with a 2650 blower and 1000CC injectors. Steck has an upgraded inline pump that can be had. It sounds like one of your pumps may be bad...

mike929

Discussion Starter · #6 · 15 d ago

a6d9cmro said:
What changed? I'm a manual car and ran a stock pump with a DSX unit. Made 880/ 770ish on E75 with a 2650 blower and 1000CC injectors. Steck has an upgraded inline pump that can be had. It sounds like one of your pumps may be bad...

Nothing. First I had the starting issue. Took the car to the shop. Car is still at the shop, got some body stuff done ( repair front bumper), painted Maloo side skirts and install. Also got a PNP Tech frostbite installed. We have sent the data to KPM.

a6d9cmro

· #7 · 15 d ago

Yea, It sounds like the secondary pump may be on the fritz. The hard start could be one of the pumps draining back into the tank, an internal fuel leak essentially...
On the chiller, the system should hold about 1.33# of freon...that's what mine held when I had the PnP unit. Just for reference

Reactions: 1

ddipert

· #8 · 15 d ago

The KPM 1000 is a single pump solution, KPM1500 is a dual pump. 1000hp at the flywheel is about 850whp on 98 octane gas. Which is 600whp on e85. Think a6d9cmro is correct doesn't look like enough pump.

I do not like the idea of drilling the tank, especially the bottom of the tank. Was thinking about drilling the top and putting a dip tube in case it leaked.

MT_SS

· #9 · 15 d ago

mike929 said:
I heard of issues with manual cars and dsx, anyone had issues?

2016 manual with stock pump and dsx aux kit. 850ish whp but running street tune almost the entire time so less hp. 91 & meth, no E here. No issues with the dsx or fuel supply so far but it's only been about a year.

Reactions: 2

a6d9cmro

· #10 · 15 d ago

well, I stand corrected...didn't realize it was a single pump... thx for the h/u @ddipert!

If you want to run an aux fuel kit without tapping the tank, use this: 09-15 ctsV (V2) Fuel Hat- Lead time for orders is approx. 1.5 weeks to ship. Working hard to get ahead and reduce this number — ALM Performance & Design, LLC...

If you are able to, replace the fuel pump...maybe with a hellcat pump and supplement with the below from DSX. Note that it is the GSL396... Tie it in to the ALM unit. Problem solved.

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mike929

Discussion Starter · #11 · 15 d ago

Thanks for the replies. KPM is saying the pump can't support my build. Questions does this pump actually support the numbers they say it can?

I'm thinking dsx. My builder trusts them and does a lot of them. It's the hole in the tank I hate.

@a6d9cmro do you know anyone that has used that hat? Looks nice. 500 and some change.... hmmmm

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a6d9cmro

· #12 · 15 d ago

mike929 said:
Thanks for the replies. KPM is saying the pump can't support my build. Questions does this pump actually support the numbers they say it can?

I'm thinking dsx. My builder trusts them and does a lot of them. It's the hole in the tank I hate.

@a6d9cmro do you know anyone that has used that hat? Looks nice. 500 and some change.... hmmmm

It’s really the only option without punching a hole in the tank. My buddy uses the hat on his twin 340 drop in deatchworks pumps.

Reactions: 1

ddipert

· #13 · 15 d ago

Mike also might need to start looking at larger lines going to the engine. As pressure goes up flow goes down.
Than fuel pump hat looks like a great idea. Think stock fuel pump, + DSXaux it would get close to 1k whp.

Reactions: 1

a6d9cmro

· #14 · 15 d ago

ddipert said:
Mike also might need to start looking at larger lines going to the engine. As pressure goes up flow goes down.
Than fuel pump hat looks like a great idea. Think stock fuel pump, + DSXaux it would get close to 1k whp.

Agree^

Wheelhopper

· #15 · 12 d ago

For what it's worth I have the DSX kit with the tapped tank, and it's absolutely unproblematic.

Reactions: 2

a6d9cmro

· #16 · 12 d ago

Wheelhopper said:
For what it's worth I have the DSX kit with the tapped tank, and it's absolutely unproblematic.

As do I. took alot to punch a hole in the tank, so I get the anxiety...when i didn't need it anymore, just put an AN cap on it...Would love to hear what solution OP comes up with.

Reactions: 1

mike929

Discussion Starter · #17 · 12 d ago

a6d9cmro said:
As do I. took alot to punch a hole in the tank, so I get the anxiety...when i didn't need it anymore, just put an AN cap on it...Would love to hear what solution OP comes up with.

I maybe going this route. I do like the ALM cap though. I'm just ready to get my car back.
1. to see how the fixed bumper and new skirts look. Quality and paint wise
2. Check out the new PNP Tech Frostbite and how it performs
3. Get full power back and roll out

Reactions: 2

a6d9cmro

· #18 · 11 d ago

mike929 said:
I maybe going this route. I do like the ALM cap though. I'm just ready to get my car back.
1. to see how the fixed bumper and new skirts look. Quality and paint wise
2. Check out the new PNP Tech Frostbite and how it performs
3. Get full power back and roll out

I hear ya on getting the car back on the road. Mine has been down a full year now with this build. However, please please please don't rush and regret. The PNP unit is a beast and you will be happy with it. I had one on a 2650 blower with non-optimal placement for the IAT sensor and saw about 70* all the time over Cyl 8...didn't matter if I was driving or spinning at 7k....

Please don't do anymore power pulls with a sketchy fuel pump...I'd hate to see a future post about how one more pass was done and that was the one that that did it...

Reactions: 4

mike929

Discussion Starter · #19 · 11 d ago

a6d9cmro said:
I hear ya on getting the car back on the road. Mine has been down a full year now with this build. However, please please please don't rush and regret. The PNP unit is a beast and you will be happy with it. I had one on a 2650 blower with non-optimal placement for the IAT sensor and saw about 70* all the time over Cyl 8...didn't matter if I was driving or spinning at 7k....

Please don't do anymore power pulls with a sketchy fuel pump...I'd hate to see a future post about how one more pass was done and that was the one that that did it...

Nice to hear about your PNP unit. The builder worked with Phil at PNP and after that and some sorting out they said it is blowing snowballs. So, I can't wait to see/feel the difference.

Yea, not going to run it. I'm really like the ALM unit. Looks to be 700+ though. We'll see. But like you said, gotta make sure the pump is good. We are waiting on a response from KPM.

mike929

Discussion Starter · #20 · 7 d ago

KPM basically said the pump is working as intended. Per KPM in ideal settings and tune running 98 octane you can get to 1000hp at the flywheel. For 1500AUD ($992 USD) plus ship, they will modify the current pump to be a KPM1500. So, that's uninstalling the pump, shipping, waiting on the pump to come back, reinstall and all the labor involved.

KPM also noted that if going to the KPM1500 there is no check valve to hold residual pressure. This may cause extended start up cranking times. Basically more heat is generated after driving 1-2hrs or extended idling. This heated fuel can cause the fuel pressure to drop due to vaporization.

DSX is looking better and better..haha

Reactions: 1

1 - 20 of 23 Posts