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-   -   Holley HP EFI conversion (https://www.offshoreonly.com/forums/general-q/365834-holley-hp-efi-conversion.html)

Rookie 04-23-2020 08:06 AM


Originally Posted by sutphen 30 (Post 4735107)
looks great,,what 3d printer do you have?

I've had a Lulzbot Taz5 for the last 5 years. I print pretty much everything with it. Gaskets, trinkets, prototypes...

Rookie 04-23-2020 08:07 AM


Originally Posted by snapmorgan (Post 4735117)
Those spacers look nice. A word of warning on your fuel rails though. I had a similar setup with the fuel regulator mounted to the fuel rail. The extra weight of the regulator caused the mounts on that side to break in some very rough water allowing the the injectors to come out of the manifold. This happened to me twice before I made some mounts out of stainless steel, the original mounts were made out of aluminum.

Noted, I'll machine up some stainless brackets.

SB 04-23-2020 09:26 AM

Great thread.

imho/e the tb spacer bottom should be same as intake manifold top.

Top of spacer mounting surface same as bottom of tbody mounting Surface.

The transition from the two is grad as possible.

All of this not as important, but can still help, as it would be as a carb or tbi tbody, because no fuel in this area to get stuck too. :)

F-2 Speedy 04-23-2020 09:44 AM


Originally Posted by Rookie (Post 4735135)
I've had a Lulzbot Taz5 for the last 5 years. I print pretty much everything with it. Gaskets, trinkets, prototypes...

what material is this printed from

Rookie 04-23-2020 10:29 AM

Carbon fiber reinforced PLA. It has a higher heat deflection temperature than basic PLA. Also, I've had a piece of this material sitting in a jar of gasoline for a month with no ill effects. I know gas won't be going through the throttle bodies. I printed carb spacers previously out of PETG.

Tinkerer 04-25-2020 08:38 PM

I have one of the Holley dual sinc distributors that you will need if you are going sequential port. Or you will have to go with a crank trigger and a cam sensor

abones 04-25-2020 10:12 PM

Rookie, how many LBs per hour do your injectors flow?

Rookie 04-25-2020 10:53 PM

I bought 80 lb/hr injectors. A little on the large size for my engines, but if I added superchargers at a later date I did not want to buy injectors again. Smitty and I discussed this before I purchased them and thought this would be the best route.

Rookie 04-25-2020 10:58 PM


Originally Posted by Tinkerer (Post 4735562)
I have one of the Holley dual sinc distributors that you will need if you are going sequential port. Or you will have to go with a crank trigger and a cam sensor

I was just pricing out crank triggers. I would eventually like to switch to sequential. Probably start out bank to bank unless I have issues with idle.

snapmorgan 04-26-2020 07:57 AM

Crank triggers are money well spent. I have seen 30hp difference on back to back pulls using a crank trigger vs pickup in dist. And the timing is rock solid.


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