Proper Fuel line sizing
- Thread starter Viprklr
- Start date
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A little background.
There are unknown modifications done to the car.
It is leaking fuel from on top of the tank.
I just bought this car from my dad, $1.00, who bought it from someone else. History will be hard to acquire.
I'm planning on just replacing the tank pump, sending unit, 100% of the lines.
Do it once, do it right.
I am a NA V8 guy. Had some fun in the turbo world back in 2000.
Sold my TransAm GTA, fully built by me.
This is my new project.
87 GN
There are unknown modifications done to the car.
It is leaking fuel from on top of the tank.
I just bought this car from my dad, $1.00, who bought it from someone else. History will be hard to acquire.
I'm planning on just replacing the tank pump, sending unit, 100% of the lines.
Do it once, do it right.
I am a NA V8 guy. Had some fun in the turbo world back in 2000.
Sold my TransAm GTA, fully built by me.
This is my new project.
87 GN
- Joined
- Jul 28, 2020
- Messages
- 942
Honestly I’d say it’s 50/50. Some guys have had no issue, some have had issues with fuel pressure/adjustments.
If you’re not going much bigger than stock power, put a 255lph in & be done. As always a Hotwire set-up from Casper’s is ALWAYS a good idea.
I’d leave it parked until you figure out what has been modded & what kind of shape the car is in mechanically.
Last edited:
- Joined
- Jun 18, 2001
- Messages
- 2,281
No.
Even if it doesn't overwhelm the return and cause a pressure control problem, it'll unnecessarily heat the fuel.
- Joined
- Feb 14, 2002
- Messages
- 5,852
If you’re gonna replace it all anyways, just go with all the racetronix stuff. Get their 525 hellcat pump & sending unit, wiring kit, and Teflon fuel lines. Add a 10ga ground wire to compliment their 10ga power feed.
Pick a horsepower first, this will dictate every thing.
Turbo, injectors ,fuel pump , fuel lines
If you choose to not change the turbo what you have will set the bar for horsepower, this will be your starting point for the fuel pump you need then we can recommend what modes will be needed Suport that pump..
But no mater what you have you will need a hot wire and a proper TT chip
Turbo, injectors ,fuel pump , fuel lines
If you choose to not change the turbo what you have will set the bar for horsepower, this will be your starting point for the fuel pump you need then we can recommend what modes will be needed Suport that pump..
But no mater what you have you will need a hot wire and a proper TT chip
Thank you, all.
The turbo has been upgraded. To what? I don't know yet. The car is currently in storage. The car has overboost issues.
I plan to upgrade the fuel system to support whatever my heart desires before getting too far under the hood. Do it once. Do it right.
For now, I'm prepping and researching. I'll flatbed the car to my garage in early April.
The turbo has been upgraded. To what? I don't know yet. The car is currently in storage. The car has overboost issues.
I plan to upgrade the fuel system to support whatever my heart desires before getting too far under the hood. Do it once. Do it right.
For now, I'm prepping and researching. I'll flatbed the car to my garage in early April.
- Joined
- Jul 28, 2020
- Messages
- 942
Then ya have no need for a bigger pump. On only pump gas, boost should be kept in the 15-18# range. A 255 will support that fine.
Last edited:
- Joined
- Jul 28, 2020
- Messages
- 942
You’ll have no issues.
If you’re not planning on running ALKY, E85, race gas, as stated, ya shouldn’t be turning the boost up anyway.
Thank you for the info. I'll have to see what's actually on the car.
What I do know is that there is an AFPR, upgraded turbo, chipped (don't know what, just that it has an option to disable the car), drag radials.
All indications that this was somebody's street/track toy at one point.
I haven't seen the car in 3 years. I seem to recall aftermarket injectors...not sure though.
What I do know is that there is an AFPR, upgraded turbo, chipped (don't know what, just that it has an option to disable the car), drag radials.
All indications that this was somebody's street/track toy at one point.
I haven't seen the car in 3 years. I seem to recall aftermarket injectors...not sure though.
If it has a chip (TT) I bet its not a TT chip. I do not have a clue how did a disable option. Must be a very old chip.
When you open the ECU and look, if it dose not say TT or Bailey Engineering on the chip , carefully remove and SMASH it.
If it says TT should be a number and Eric can tell you what it was burned for..
When you open the ECU and look, if it dose not say TT or Bailey Engineering on the chip , carefully remove and SMASH it.
If it says TT should be a number and Eric can tell you what it was burned for..
That makes things easy and cheaper as you will have no way to make more than stock power.
Boost will be limited to around 15psi depending on how much timing you throw at it.
The 255 will be all you need for that.
Flush your rail and lines and flow injectors if it checks out use the stock stuff.
Overboosting on 93 octane is a sure way to detonation and will take out the head gaskets.
Check the clamps(may have a broken one)try tightening the clamps for the hoses.
You may get lucky
If not the seal for the sending unit/pump could be bad or improperly installed.
With the bigger turbo it probably came with a HD actuator.
Adjust the rod and get the boost down to 13/15 psi.
Verify your fuel pressure goes 1to1 with boost.
