Isayimandrew's Twin Turbo Build

Elmo370z · 10-21-2022, 12:14 PM

Quote:

Originally Posted by isayimandrew

So the CJM Twin pump and the 1300X should be a good set up?

I made 700 with 1300’s on e94 Duty cycle was at 70 something %

isayimandrew · 10-21-2022, 01:11 PM

Jotech was also thinking of using a radium surge tank setup to just add on to my existing setup so I wouldn't have to replace as many parts. We would reuse my walbro 450, and relace the current in-tank pump with either a stock unit or a smaller upgraded pump since its just used as a lift pump to keep the surge tank full. And as a bonus would address the fuel starvation problems our cars have issues with.

redondoaveb · 10-21-2022, 04:38 PM

Quote:

Originally Posted by isayimandrew

Jotech was also thinking of using a radium surge tank setup to just add on to my existing setup so I wouldn't have to replace as many parts. We would reuse my walbro 450, and relace the current in-tank pump with either a stock unit or a smaller upgraded pump since its just used as a lift pump to keep the surge tank full. And as a bonus would address the fuel starvation problems our cars have issues with.

If you're planning on staying at the power level you're at right now, that would sure save you some money. I run CJM twin pump set up with his new surge canister to address fuel starve

isayimandrew · 10-22-2022, 12:26 AM

Quote:

Originally Posted by redondoaveb

If you're planning on staying at the power level you're at right now, that would sure save you some money. I run CJM twin pump set up with his new surge canister to address fuel starve

What power level would the radium setup with 1300X injectors support? Trying to do some research and get as much info from some experienced people so that I can communicate better with Jotech.

I am not really trying to push for a specific number but I definitely want to maximize my build without pushing it past reliability and drivability. I also want to stay a good amount below 800whp since that seems to be the magic number of when things become unreliable.

redondoaveb · 10-22-2022, 09:23 AM

Quote:

Originally Posted by isayimandrew

What power level would the radium setup with 1300X injectors support? Trying to do some research and get as much info from some experienced people so that I can communicate better with Jotech.

I am not really trying to push for a specific number but I definitely want to maximize my build without pushing it past reliability and drivability. I also want to stay a good amount below 800whp since that seems to be the magic number of when things become unreliable.

I unfortunately don't know anything about the Radium set up. The secondary pump is just used to just keep the surge tank full? So you'd just be using your single 450 for your fuel supply?

Elmo370z · 10-22-2022, 11:27 AM

Quote:

Originally Posted by isayimandrew

What power level would the radium setup with 1300X injectors support? Trying to do some research and get as much info from some experienced people so that I can communicate better with Jotech.

I am not really trying to push for a specific number but I definitely want to maximize my build without pushing it past reliability and drivability. I also want to stay a good amount below 800whp since that seems to be the magic number of when things become unreliable.

It’s need some work to work with a return set up. I highly recommend contacting Cjm for the twin pump surge set up. Ran it down to two dots few weeks ago at the track. When I wasn’t overheating it never starved

isayimandrew · 10-22-2022, 12:33 PM

Quote:

Originally Posted by Elmo370z

It’s need some work to work with a return set up. I highly recommend contacting Cjm for the twin pump surge set up. Ran it down to two dots few weeks ago at the track. When I wasn’t overheating it never starved

So it would be better to just replace what I currently have (except the 450 pump) and go with the CJM setup instead of retrofitting to keep most of what I have with the Radium setup?

isayimandrew · 10-22-2022, 10:02 AM

They would be putting a 340 into the factory basket as a lift pump for the surge tank and then put my existing 450 and a new 450 into the surge tank to deliver the fuel to the engine.

redondoaveb · 10-22-2022, 12:20 PM

Quote:

Originally Posted by isayimandrew

They would be putting a 340 into the factory basket as a lift pump for the surge tank and then put my existing 450 and a new 450 into the surge tank to deliver the fuel to the engine.

OK, that makes sense

SeeThruHead · 10-22-2022, 11:41 AM

return fuel line will be better on a boosted car
the radium is return-less, it bleeds off pressure back into the surge tank.

to quote phunk

"fuel pressure drop at high power is a result of the pressure drop that occurs across the fuel lines. By regulating fuel pressure at the pump, rather than at the rails, you will always have fuel pressure drop as HP goes higher and higher."

basically you want the regulator at the rails, not the pump.

radium will handle your fuel starve issues, and fine if you're not pump a lot of fuel
but the cjm return fuel system + anti starve canister is going to be better for higher HP

SeeThruHead · 10-22-2022, 01:10 PM

Why can't you use the Fast 500E fuel return/regulator etc.

The only thing you'll be replacing is the CJM top hat to a CJM twin pump + canister no?

The radium setup is returnless so you'd either have to modify it or remove the Fast 500E fuel return kit.

Changing to CJM twin pump + canister is probably the cheaper AND better option.

Spooler · 10-22-2022, 06:07 PM

Quote:

Originally Posted by SeeThruHead

Why can't you use the Fast 500E fuel return/regulator etc.

The only thing you'll be replacing is the CJM top hat to a CJM twin pump + canister no?

The radium setup is returnless so you'd either have to modify it or remove the Fast 500E fuel return kit.

Changing to CJM twin pump + canister is probably the cheaper AND better option.

The Radium can be modified to have a return. MA did it on Johnxxx's car from what I remember.

isayimandrew · 10-22-2022, 09:09 PM

I am getting both the CJM setup and Radium setup quoted out from them but I am leaning more towards the CJM setup based on what you guys are saying. Jotech is going to be running the Radium setup on another Z so thats one of the other reasons why that solution came up as an option.

Elmo370z · 10-23-2022, 05:23 PM

Quote:

Originally Posted by isayimandrew

I am getting both the CJM setup and Radium setup quoted out from them but I am leaning more towards the CJM setup based on what you guys are saying. Jotech is going to be running the Radium setup on another Z so thats one of the other reasons why that solution came up as an option.

Spend the money once. Radium will work. But Cjm is worth it’s weight on gold. It’s was designed for the 370 with a return system.

Spooler · 10-23-2022, 05:59 PM

Quote:

Originally Posted by Elmo370z

Spend the money once. Radium will work. But Cjm is worth it’s weight on gold. It’s was designed cars with a return system.

Yup, that's what I have.

10-22-2022, 10:02 AM	#8 (permalink)
isayimandrew Enthusiast Member Join Date: Sep 2012 Location: Texas Posts: 321 Drives: 13 370Z Nismo MR M6 Rep Power: 14	They would be putting a 340 into the factory basket as a lift pump for the surge tank and then put my existing 450 and a new 450 into the surge tank to deliver the fuel to the engine. redondoaveb likes this.

10-22-2022, 11:41 AM	#10 (permalink)
SeeThruHead Track Member Join Date: Jun 2020 Location: Toronto Posts: 716 Drives: Red '18 Sport Manual Rep Power: 23499	return fuel line will be better on a boosted car the radium is return-less, it bleeds off pressure back into the surge tank. to quote phunk "fuel pressure drop at high power is a result of the pressure drop that occurs across the fuel lines. By regulating fuel pressure at the pump, rather than at the rails, you will always have fuel pressure drop as HP goes higher and higher." basically you want the regulator at the rails, not the pump. radium will handle your fuel starve issues, and fine if you're not pump a lot of fuel but the cjm return fuel system + anti starve canister is going to be better for higher HP isayimandrew and xxAGAVExx like this. __________________ My Build thread STH Build Plan Thread Images too big fix here

10-22-2022, 01:10 PM	#11 (permalink)
SeeThruHead Track Member Join Date: Jun 2020 Location: Toronto Posts: 716 Drives: Red '18 Sport Manual Rep Power: 23499	Why can't you use the Fast 500E fuel return/regulator etc. The only thing you'll be replacing is the CJM top hat to a CJM twin pump + canister no? The radium setup is returnless so you'd either have to modify it or remove the Fast 500E fuel return kit. Changing to CJM twin pump + canister is probably the cheaper AND better option. isayimandrew likes this. __________________ My Build thread STH Build Plan Thread Images too big fix here Last edited by SeeThruHead; 10-22-2022 at 01:12 PM.

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10-21-2022, 01:11 PM	#2 (permalink)
isayimandrew Enthusiast Member Join Date: Sep 2012 Location: Texas Posts: 321 Drives: 13 370Z Nismo MR M6 Rep Power: 14	Jotech was also thinking of using a radium surge tank setup to just add on to my existing setup so I wouldn't have to replace as many parts. We would reuse my walbro 450, and relace the current in-tank pump with either a stock unit or a smaller upgraded pump since its just used as a lift pump to keep the surge tank full. And as a bonus would address the fuel starvation problems our cars have issues with.

10-22-2022, 09:09 PM	#13 (permalink)
isayimandrew Enthusiast Member Join Date: Sep 2012 Location: Texas Posts: 321 Drives: 13 370Z Nismo MR M6 Rep Power: 14	I am getting both the CJM setup and Radium setup quoted out from them but I am leaning more towards the CJM setup based on what you guys are saying. Jotech is going to be running the Radium setup on another Z so thats one of the other reasons why that solution came up as an option.