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PostPosted: Sat Oct 07, 2017 5:16 am 
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Joined: Wed Jun 25, 2003 1:15 pm
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Location: Israel Drives:1972_taunus, 1988 Fiesta 1.1 CL
Hi.
At last, after more than 5 years that the engine was at storage, i inserted it to the car.
The engine was completely rebuilt.
It's a 1987 5bearing Valencia (OHV) 1.3, engine code JLA.

Installed a Kent FastRoad (FST2) camshaft. http://www.kentcams.com/product-details ... T2-Sports/
Pistons were changed to flat (to increase compression).
i am about to finish the first 1000KM and then i will attach the 2*DCNF36 set (with the original SeriesX manifold).

Now i have to build a manifold.
I was thinking of a 4 branch tubular, 4->1 (to get a little more torque and less HP)
What should be the diameter and length of the tubes?
4X 1" into the a single 2" ?
and what length to the 4 branches?

Engine will not be a screamer, i believe i will not go above 7K (RPM) in any case. Maybe 6-6.5

I used this calculator with values:
http://www.wallaceracing.com/header_length.php

Stroke: (Inches) 2.97
Bore: (Inches) 2.92
Number of Cylinders: 4
Exhaust Valve Diameter: (Inches) 1.14
Exhaust Valve Opening Point: (Degrees ) 73
Exhaust Valve Duration: (Advertised) 290
Exhaust Valve Centerline: (Degrees) 108
Peak Power RPM: 6500
Volumetric Efficiency: 0.8

and this is the result:
Your Primary Tube Length is 35.48
Your Primary Tube Diameter is 0.82 inches
Your Collector Diameter is 1.39 inches One Collector

Thanks.

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PostPosted: Sat Oct 07, 2017 12:22 pm 
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Joined: Fri May 23, 2003 11:04 pm
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Location: Manchester
From what I've seen of 1.1 and 1.3 manifolds I'd say tgat was about right.

Without measuring. It sounds similar to the manifold parts I have.

Jason.

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PostPosted: Sat Oct 07, 2017 2:46 pm 
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Joined: Wed Jun 25, 2003 1:15 pm
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Location: Israel Drives:1972_taunus, 1988 Fiesta 1.1 CL
If you have a tubular manifold for a valencia, could you please take the measurments?
no hurry.
* primary tubes length
* primary tubes inside diameter
* collector inside diameter.

Thanks!!

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PostPosted: Mon Oct 09, 2017 2:30 am 
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Joined: Fri May 23, 2003 11:04 pm
Posts: 22058
Location: Manchester
udical wrote:
If you have a tubular manifold for a valencia, could you please take the measurments?
no hurry.
* primary tubes length
* primary tubes inside diameter
* collector inside diameter.

Thanks!!


I don't.
I currently have a box of tubes with bends in them.
:/

Jason.

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PostPosted: Tue Oct 10, 2017 5:52 pm 
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Joined: Wed Jun 25, 2003 1:15 pm
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Location: Israel Drives:1972_taunus, 1988 Fiesta 1.1 CL
ouch LOL

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