regulator before the rail?
you can, but it is not the best way to do it, you will not always be able to maintain the required pressure in the rails. I know of many people who have just tapped the factory rails to run A/N lines to/from them.
I have an Aeromotive boost ref reg before the LS3 rails-I use a #8 line dead headed to the rails, the return is from the reg
works good, I data logged the FP, works fine-I have the FP sensor at the end of the fuel rail where the shrader valve was, used an adapter to 1/8 pipe
works good, I data logged the FP, works fine-I have the FP sensor at the end of the fuel rail where the shrader valve was, used an adapter to 1/8 pipe
It depends on the regulator type & the power output.
I have seen this cause a lot of fuel pressure issues on high HP cars... some as low as 600rwhp have had pressure stability problems. Many regulators are restrictive internally & cause these problems.
If it works for you, good, consider yourself lucky... but this is not the proper way to plumb a fuel system.
Over the years I've had many calls concerning problems that were solved by re-plumbing the regulator/rails.
If designing a system from scratch, invest in the rails to prevent doing things twice.
I have seen this cause a lot of fuel pressure issues on high HP cars... some as low as 600rwhp have had pressure stability problems. Many regulators are restrictive internally & cause these problems.
If it works for you, good, consider yourself lucky... but this is not the proper way to plumb a fuel system.
Over the years I've had many calls concerning problems that were solved by re-plumbing the regulator/rails.
If designing a system from scratch, invest in the rails to prevent doing things twice.
how would you plumb a return style fuel rail-would you go from a pump to one rail, use a cross over to the other side, and have that side go to the reg and return from there?
are there rail kits that fit like an LS3 intake, with the correct spacing for the injectors
are there rail kits that fit like an LS3 intake, with the correct spacing for the injectors
TECH Enthusiast
Joined: Jul 2010
Posts: 571
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NO, Inlet should feed both rails. Out let should go to the pressure regulator, then return to tank.
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As for aftermarket LS3 rails, they are available.
Please call if you are interested in a set.
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