[Subscribe to Daily Digest] |
Back when I was building turbo Porsches, we ran into some issues with fuel pump capacity limitations. The key is to make sure you have enough fuel system capability to supply the kit it's necessary fuel at it's necessary pressure. If you are running more than factory boost or an upgrade blower, then it's already using some of the "reserve" of the fuel system. Really it's not even the system so much that you're concerned about. It's the pump. When we bolt on larger turbos and such we spend a lot of time focusing on injector size/flow rate etc. These things don't affect the nitrous situation at all because it uses it's own injectors (so to speak). However there is one EXCEPTION to this statement and it comes down to assessing the extent to which we've tapped the additional resources of the factory fuel pump. At some point, the pump will need more capacity to maintain the correct pressure and that line varies with every turbo car combination. Everything from your boost pressure to your turbo size and efficiency map will affect the point at which this line will be crossed. The same principles apply to the normally aspirated cars it's just much harder/expensive to make any substantial tap of the fuel system because the amount of fuel necessary to complement a ram air system or even a good set of cylinder heads is nowhere near as large as the additional fuel necessary for a car that boosted 9PSI with a T-25 to boost 25PSI with a GT3071.
So...having gone through all of that, the biggest thing is to make sure that your pump can flow the amount of fuel necessary for the combined requirements of your turbo/PSI and NOS in gallons per hour or liters per hour against fuel rail PSI. If it's got the capacity, you're good to go.
posted by 68.46.234...
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
![]() |
![]() |
![]() |
![]() |
![]() |