C5 Flex Fuel/TBSS Setup
Thread Starter
8th Gear
Joined: Sep 2022
Posts: 8
Likes: 0
C5 Flex Fuel/TBSS Setup
LS Gurus,
I'm in the process of building a 2000 Corvette with a bit of a hodgepodge engine, and trying to figure out exactly how I want to run my fuel setup. As far as I know, the pump and lines are all original, but the engine is from a '97, and has a TBSS intake, so it is the newer style rail, injectors, and throttle body. I haven't selected injectors yet, and with this car NA, my hope is that I can manage to flow enough fuel with stock lines and improved injectors. As far as fuel goes, I have good E85 availability locally, and have another vehicle that's already proven significant cost savings in running E85 over 93 in the long run. I'm not as well informed on exactly what the setup is for flex fuel, about the most I know is that most kits use an inline flex fuel sensor, often even a GM part. Any clarity on what other changes may need to be made, or even injector suggestions (I am on a college kid budget), would be highly appreciated. If ya'll have done similar setups, information on your builds and successes and failures is all the better.
Thanks,
A Next Gen Hotrodder
I'm in the process of building a 2000 Corvette with a bit of a hodgepodge engine, and trying to figure out exactly how I want to run my fuel setup. As far as I know, the pump and lines are all original, but the engine is from a '97, and has a TBSS intake, so it is the newer style rail, injectors, and throttle body. I haven't selected injectors yet, and with this car NA, my hope is that I can manage to flow enough fuel with stock lines and improved injectors. As far as fuel goes, I have good E85 availability locally, and have another vehicle that's already proven significant cost savings in running E85 over 93 in the long run. I'm not as well informed on exactly what the setup is for flex fuel, about the most I know is that most kits use an inline flex fuel sensor, often even a GM part. Any clarity on what other changes may need to be made, or even injector suggestions (I am on a college kid budget), would be highly appreciated. If ya'll have done similar setups, information on your builds and successes and failures is all the better.
Thanks,
A Next Gen Hotrodder
Drifting
Joined: Nov 2019
Posts: 1,264
Likes: 381
From: SC
You may know already but the TBSS intake wont fit under a stock hood. If you already have a higher hood then no problem, otherwise sell/trade for an ls6 intake. There is a thread somewhere about swapping to the later p59 pcm to use flex fuel if you really want to. Search for ‘DIY flex fuel c5’. That thread should have all the parts and information you need. That being said I’m not sure it’s worth it on most NA builds
Running Guns & Moonshine
Joined: Aug 2001
Posts: 12,558
Likes: 7,238
From: CT
LCV nailed everything on this one.
Re budget, my experience with E85 and how it eats through seals over time has been sufficient to turn me away from it. The seals themselves are not hugely expensive but not cheap either. The headache is not knowing when they'll fail.
Question. Having a 1/3 less range or mpg vs pump gas is going to work where you are? I presume yes. Just checking.
Re budget, my experience with E85 and how it eats through seals over time has been sufficient to turn me away from it. The seals themselves are not hugely expensive but not cheap either. The headache is not knowing when they'll fail.
Question. Having a 1/3 less range or mpg vs pump gas is going to work where you are? I presume yes. Just checking.
Racer
Joined: Apr 2019
Posts: 305
Likes: 117
From: Central PA
2024 C5of the Year Finalist - Unmodified
Here's the thread with a lot of flex fuel information.
https://www.corvetteforum.com/forums...uel-on-c5.html
I would also trade the TBSS intake for one that fits better IMO.
Keep us posted on the process!!
https://www.corvetteforum.com/forums...uel-on-c5.html
I would also trade the TBSS intake for one that fits better IMO.
Keep us posted on the process!!
