Fuel Injection Manifolds

[FiatMac]

OK, I am starting an new thread to discuss intake manifolds for fuel injected engines.

Clark,
How far upstream did you open up the stock manifold beyond the interface with the head? I don't have an inside micometer so was unable to measure much beyound face. The runner takes a bend rather quickly, and I don't know how far the face runner diameter extends.

Also could you post your results to this thread so we can keep things together?

Thanks!

[FiatMac]

Clark,
Hope you don't mind. I was able to get a link to your data and include it in this post.

Clark's Data http://www.flickr.com/photos/65984720@N07/6009827274/

[fiatfactory]

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[fiatfactory]

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[burgandy81]

Hi FiatMac,

I have played around with this a little.

Pictures and a bit of a story here;

http://www.turbo124.com/forum/viewtopic.php?f=11&t=7405

It is the boring story of my very long turbo spider build.

Have a look and let me know if you have any specific questions.

I still have the extra intake that is mentioned in the thread.

Cheers,

Jordan

[FiatMac]

Thanks for the comparison drawing and info on purchase. If I go this route I need to decide on bare manifold vs. with TB and injectors. What is the flow rate on the Croma injectors?

SteveC wrote:
"Here's a little comparison between some stock Fiat manifolding, personally I like the Croma manifold, and yes it fits a RHD spyder / coupe body... "

Since I am in the US, my spider is LHD. Looks like the Croma manifold might interfere with the Brake booster and/or the master cylinder??? I have been toying with a design modification to install dual reverse mount master cylinders under the scuttle/dash using Tilton or Willwood master cylinders and cross bar for brake bias. That would clear up some space under the hood.

[FiatMac]

I see that Kbe00 already answered my question about the Croma interference with the brake booster in the Megasquirt thread.

[kbee00]

Thanks for the comparison drawing and info on purchase. If I go this route I need to decide on bare manifold vs. with TB and injectors. What is the flow rate on the Croma injectors?

SteveC wrote:
"Here's a little comparison between some stock Fiat manifolding, personally I like the Croma manifold, and yes it fits a RHD spyder / coupe body... "

Since I am in the US, my spider is LHD. Looks like the Croma manifold might interfere with the Brake booster and/or the master cylinder??? I have been toying with a design modification to install dual reverse mount master cylinders under the scuttle/dash using Tilton or Willwood master cylinders and cross bar for brake bias. That would clear up some space under the hood.

I would also like to know the flow rate of the Croma injectors....

If you decide to go the dual master route - I would like to learn along with you. I had toyed with this idea too, but not sure if the extra effort is worth it on a street car. All my race cars of course had dual masters with a bias bar but that was almost a requirement at that level.

The biggest issue I see is room under the dash for the masters.

Anyway - I will follow along and if I can help in any way, let me know. My car is being torned down completely for a rebuild so it won't be until the winter when I reassemble it anyway. I have room now that the dash is completely out of the car - so if you need measurements, etc. let me know.

[FiatMac]

Kbee00,
Thanks for the offer. I have a parts car that is mostly disassembled that I will used to test fit things. I am looking at modifying the existing brake/clutch pedal assembly to mount the master cylinders. Looks doable right now but I have not started a prototype. My biggest concern is access for maintenance.

[BEEK]

If you decide to go the dual master route - I would like to learn along with you. I had toyed with this idea too, but not sure if the extra effort is worth it on a street car. All my race cars of course had dual masters with a bias bar but that was almost a requirement at that level.

The biggest issue I see is room under the dash for the masters.

Anyway - I will follow along and if I can help in any way, let me know. My car is being torned down completely for a rebuild so it won't be until the winter when I reassemble it anyway. I have room now that the dash is completely out of the car - so if you need measurements, etc. let me know.

off thread topic: my scorpion build has dual master cylinders, when i was using fiat brakes i used a 13/16 ft and a 3/4 rear m/c, now im using mitsubishi 3000gt brakes.

[fiatfactory]

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[So Cal Mark]

Steve, I had not received any emails from you