[JSH]

My new build has forced me to look for the next step up in fuel delivery and I always assumed it was going to be this pump. However, a brief investigation on the web indicates that this pump has experienced some serious problems.

Is there another high pressure fuel pump that would satisfy my needs or must I go to one of the port injections?

[2023_ZL1-AUTO]

Originally Posted by JSH

My new build has forced me to look for the next step up in fuel delivery and I always assumed it was going to be this pump. However, a brief investigation on the web indicates that this pump has experienced some serious problems.

Is there another high pressure fuel pump that would satisfy my needs or must I go to one of the port injections?

Can Gabe assist?

Do you have the option for Katech Dual Pump, DSX Aux and Port injection?

[JSH]

Originally Posted by 2023_ZL1-AUTO

Can Gabe assist?

Do you have the option for Katech Dual Pump, DSX Aux and Port injection?

Yeah I think so. I've got the DSX low side and my intake runners have the bungs for port injection. So I could probably make it work.

[Joshinator99]

Originally Posted by JSH

My new build has forced me to look for the next step up in fuel delivery and I always assumed it was going to be this pump. However, a brief investigation on the web indicates that this pump has experienced some serious problems.

Is there another high pressure fuel pump that would satisfy my needs or must I go to one of the port injections?

If you’re on race gas, LPE Big Bore HPFP with a +32 or better fuel lobe on your cam and bigger injectors will take you a long way. I did 1059 WHP on that combo on E50, which takes more fuel than race gas by a good bit. I suspect you’d hit 1150-1200 WHP on race gas.

Honestly, you should just bite the bullet and do port injection at this point. I kicked the can down the road for years and felt like I was always struggling to get enough fuel into the motor.

[ZLRob]

I run the XDI version of the Goliath which I believe may be the most recent iteration of it. The problem with them was that a lot of people were installing it by just sending one side of the bolts all the way home and then tightening the other side (which is an absolute no no anyways and should be common sense but here we are) so the springs were sitting in there all cocked which would ruin them, and by ruin I mean breaking of the smaller secondary spring. That and these set ups are a little more sensitive on install compared to the LT4 HPFP. It's really made for folks who run 32% fuel lobes on their cam set ups and I believe that may have been confirmed by Stanadyne themselves if I remember correctly. Anything more than that and you will run into issues. So if you have a 38 or a 42% lobe you're out of the running for one of these.

I've been beating the shit out of it since I installed it without a single problem. So much so, that I no longer see the need in keeping my old LT4 HPFP as a backup.

The only caveat is that it is louder than the LT4 pump so expect some added fuel pump noise in the engine bay. It is what it is.

[JSH]

Originally Posted by Joshinator99

If you’re on race gas, LPE Big Bore HPFP with a +32 or better fuel lobe on your cam and bigger injectors will take you a long way. I did 1059 WHP on that combo on E50, which takes more fuel than race gas by a good bit. I suspect you’d hit 1150-1200 WHP on race gas.

Honestly, you should just bite the bullet and do port injection at this point. I kicked the can down the road for years and felt like I was always struggling to get enough fuel into the motor.

I've got enough fuel at 7,000 ft. but I won't have enough at lower elevations. I've got the 38% fuel lobe and +30, so I could increase those to like +50. Who would you go to for the LPE pump?

[RobZL1]

I think the Goliath issues were (a) a bad batch that was recalled and (b) user error. I confirmed mine was not in the bad batch with XDI.

I can also say you need to be very careful in how you install this. You can't just drop it in. Preload and max travel are important. You have to know your numbers. See my build thread. Granted, I havent started the car yet. But I can see how people get into trouble with this pump.

[ZLRob]

Originally Posted by JSH

I've got enough fuel at 7,000 ft. but I won't have enough at lower elevations. I've got the 38% fuel lobe and +30, so I could increase those to like +50. Who would you go to for the LPE pump?

Lingenfelter. Based on your cam lobe, unfortunately you wouldn't be a candidate for the Goliath based on specs of the design alone as this was something that Gabe, myself, and Stanadyne confirmed.

Originally Posted by RobZL1

I think the Goliath issues were (a) a bad batch that was recalled and (b) user error. I confirmed mine was not in the bad batch with XDI.

I can also say you need to be very careful in how you install this. You can't just drop it in. Preload and max travel are important. You have to know your numbers. See my build thread. Granted, I havent started the car yet. But I can see how people get into trouble with this pump.

This right here. Very important to make sure your preload and max travel are set up right. If you aren't good with visually knowing what gaps look like then you will have to invest in a set of feeler gauges for sure for the preload part. Determining max travel is easier.

[RobZL1]

Originally Posted by ZLRob

Lingenfelter. Based on your cam lobe, unfortunately you wouldn't be a candidate for the Goliath based on specs of the design alone as this was something that Gabe, myself, and Stanadyne confirmed.



This right here. Very important to make sure your preload and max travel are set up right. If you aren't good with visually knowing what gaps look like then you will have to invest in a set of feeler gauges for sure for the preload part. Determining max travel is easier.

Very interested in the 38% comment, as I've got a 38% lobe. A 32% lobe seems like it wouldn't do much more than the LT4 pump?

What didn't Stanadyne like about the 38% lobe? Max travel? My pump compresses about 10mm and I'm only using about 8mm of travel. I wasn't concerned, but now I'm very curious as to what Stanadyne had to say.

See posts 144 and 145 for my notes:
https://www.camaro6.com/forums/showt...632809&page=11

[ZLRob]

Originally Posted by RobZL1

Very interested in the 38% comment, as I've got a 38% lobe. A 32% lobe seems like it wouldn't do much more than the LT4 pump?

What didn't Stanadyne like about the 38% lobe? Max travel? My pump compresses about 10mm and I'm only using about 8mm of travel. I wasn't concerned, but now I'm very curious as to what Stanadyne had to say.

See posts 144 and 145 for my notes:
https://www.camaro6.com/forums/showt...632809&page=11

I can't exactly remember the findings on it because it was mostly talked about over the phone sort of thing and not a documented thing by Gabe and myself. What they said would be more of a thing to check with him about because I'm more of a install properly, then let her eat kind of guy. I don't have the time or energy to document stuff frequently and some of that is an artifact from my time working automotive and being constantly under pressure to repair all these broken vehicles that needed to get back to the customer. Some of that bleeds over into my own vehicles unfortunately.

I may be entirely off kilter here and may be prefacing what I'm saying based on the fact that my set up didn't require a lash cap or anything special to run it. It was essentially a plug and play set up just like the LT4 pump was after my cam install.

If I do remember right there was an issue with overall mm of travel with set ups larger than 32% but if you are running one on yours with a 38%.. oh wait, you said you haven't started yours up yet huh? That'll be the x factor here, but if you measured it out and it set up okay then obviously you turned over the engine a few times to confirm binding wasn't present, I trust that it should work just fine without a hitch.

Edit: I just read over your notes. Very interesting stuff! You did require modification to the valley or other items to make it work though correct?

[RobZL1]

Originally Posted by ZLRob

I can't exactly remember the findings on it because it was mostly talked about over the phone sort of thing and not a documented thing by Gabe and myself. What they said would be more of a thing to check with him about because I'm more of a install properly, then let her eat kind of guy. I don't have the time or energy to document stuff frequently and some of that is an artifact from my time working automotive and being constantly under pressure to repair all these broken vehicles that needed to get back to the customer. Some of that bleeds over into my own vehicles unfortunately.

I may be entirely off kilter here and may be prefacing what I'm saying based on the fact that my set up didn't require a lash cap or anything special to run it. It was essentially a plug and play set up just like the LT4 pump was after my cam install.

If I do remember right there was an issue with overall mm of travel with set ups larger than 32% but if you are running one on yours with a 38%.. oh wait, you said you haven't started yours up yet huh? That'll be the x factor here, but if you measured it out and it set up okay then obviously you turned over the engine a few times to confirm binding wasn't present, I trust that it should work just fine without a hitch.

Edit: I just read over your notes. Very interesting stuff! You did require modification to the valley or other items to make it work though correct?

Yeah, post #148 and #150 have a photo of the modified valley cover and additional notes, too.

Ok, this makes sense. Thanks for the additional info. Yeah, from my perspective the keys are: ensure there is preload, ensure you measure a ton, and don't use a lash cap on the Goliath since it doesn't fit.

If you have preload, and you know the max travel still has 0.030"+ , then I think it should be fine. My opinion only, of course. We'll see how mine works once it's running.

[ZLRob]

Originally Posted by RobZL1

Yeah, post #148 and #150 have a photo of the modified valley cover and additional notes, too.

Ok, this makes sense. Thanks for the additional info. Yeah, from my perspective the keys are: ensure there is preload, ensure you measure a ton, and don't use a lash cap on the Goliath since it doesn't fit.

If you have preload, and you know the max travel still has 0.030"+ , then I think it should be fine. My opinion only, of course. We'll see how mine works once it's running.

Ah yeah! I do remember reading some of that and thinking to myself, "damn, there's a lot of measurements going on there and it seems like he's going the extra distance to make it work." At the time I didn't realize that you had a 38% lobe and that you were modifying the valley cover and the mounting pad of the pump in order to make it work.

Without saying this offensively because there is absolutely none intended Rob I gotta say that their base instructions and the pump itself are really designed for folks who are looking for a plug and play solution with minimal set up required for it to run. Of course anything can work with enough money and resources or access to, but your set up is definitely extracurricular and required additional outsourcing to make it allow for functionality. It's basically an LT4 pump with additional modifications to allow for increased volume and flow output designed by the very manufacturer who built the pumps for GM in the first place. That's just the way they made it. Again, I say this with no intent to offend, and I'm glad to see that it can be configured with enough time to allow for it to run. Great job by the way! Let us or even me know when you fire it up and whether or not it was a fruitful venture, though I assume it will indeed be fruitful based on your findings.

[KingLT1]

On race gas a LPE big Bore & +50 injectors should support 1100+whp. +65's would likely support 1250-1300.


Moral of the story, I think you will need the LPE pump and larger injectors. Or go Port as Josh mentioned.

I don't have any experience with the Goliath pump, but that is interesting to know they don't like 38% lobes. But I do know some shops have been moving back to 32% lobes for longevity purposes regardless of the high side pump type.

[ZLRob]

Originally Posted by KingLT1

On race gas a LPE big Bore & +50 injectors should support 1100+whp. +65's would likely support 1250-1300.


Moral of the story, I think you will need the LPE pump and larger injectors. Or go Port as Josh mentioned.

I don't have any experience with the Goliath pump, but that is interesting to know they don't like 38% lobes. But I do know some shops have been moving back to 32% lobes for longevity purposes regardless of the high side pump type.

I believe they are dialing back the fueling lobe because they are finding that as the lobe gets more and more aggressive the lobe becomes more triangular in nature/ shape and therefore could lead to a decrease in physical lobe profile longevity due to additional wear. It makes sense that they are doing that. That alone is what made me grab a cam that had a 32% lobe and nothing larger. At the time my line of thinking was that it should provide me all the fueling that I need for my build and then some, but if I ever needed more, I could just get a Goliath and make up the difference without needing to do the cam again and cause premature wear.