Thanks! Always good to know who is out there.I used Brightworks in Piqua, Ohio.
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Thanks! Always good to know who is out there.I used Brightworks in Piqua, Ohio.
Can you post some photos of what you are doing there. I see you haven't replaced the stock mounts but don't see your under floor structure. How are you attaching them?...and added some structure under the floors to accommodate mounts for the Mazda Miata seats that will be going in the car...
I've done a lot of research and time spent talking to techs from Fitech, MSD, and Holley .
The problem is the Offenhauser is not a dual plane, it is a dual-port. It's not a dual plane which feeds different cylinders, it is essentially two manifolds in one. What makes the 4 barrel work is that it is a two-stage setup. The Offenhauser works in the two-stage setup. The first stage works well in the lower RPM and the second stage works at the higher RPM range. The Holley of Fitech are not two-stage setups like the 390 Holley 4 barrel. I'd suggest a conversation with an Offenhauser tech. The link below clarifies the dual-port setup.One more follow-up...I contacted Ethan Moss at Holley technical support...provided him with details regarding my proposed build and here is his response:
"I've used the 4150 4bbl Sniper on applications with 175hp with great results, you should be fine. The Sniper uses a proprietary annular ring for fuel delivery above the throttle blades. Other throttle body systems with injectors below the throttle blades do require a single plane or milled divider dual plane intake or an open spacer, but the Sniper is fine to use with a untouched dual plane intake and no spacer is required."
I haven't heard back from Fitech yet...but their Go Street 400 unit is spec'd to be applicable for engines down to 150 hp...other than perhaps having to deal with the cross air flow issue one way or another, I don't see an issue with it either.
The problem is the Offenhauser is not a dual plane, it is a dual-port. /QUOTE]
I don't want to rain on your parade, but I wanted you to know what the EFI entails before you make a $2k purchase. Your build does look nice.Oh, I get it now. I’ll ponder it and talk to a few people.
Nothing like rain on a convertible!I don't want to rain on your parade, but I wanted you to know what the EFI entails before you make a $2k purchase. Your build does look nice.