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Old 12-24-2017, 03:54 AM   #15
MLue1
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Drives: 2010 Golf 2.5 CW 5sp / 2009 Tiguan
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Location: ON your tail with my slow a$$ 2.5
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Quote:
Originally Posted by nature boy View Post
no worries. if i had the time to do this (and the know-how) i would, but i'm too much of a dunce to figure it out.



this is really interesting. i wasn't aware that you already have a custom job done. do you have pictures or a write up of it or anything (like, more so than what you just wrote there)? i'd be interested in learning more about it. thanks man.
This s a hobby for me, with each version I made progress but they all worked to some extent, the second proof of concept version is the one I was running last week but because it is a hack job copy of the C2 SRI, it's barely able to support its own weight, I wouldn't want anyone to try to copy it, with the weight of the throttle body and filter attached, it breaks and leaks where it's glued.

The objective is to do it on the cheap, I will provide instructions on how to copy it if they want to, just be patient. I'm trying to get the next version ready to go south middle of January, and I'll be in Daytona for the Rolex 24 weekend, I want to drive down with it if I can get 'her done!

Would love to drive VIR on my way down : ) with a SRI if no snow.

Until then Merry Christmas

Last edited by MLue1; 12-24-2017 at 04:49 AM. Reason: Mo
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Old 02-07-2018, 08:38 PM   #16
eyedeas
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Hows the progress man?
I just read all of your posts and its impressive to me that youre even attempting this!!
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Old 02-12-2018, 01:00 AM   #17
MLue1
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Drives: 2010 Golf 2.5 CW 5sp / 2009 Tiguan
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Location: ON your tail with my slow a$$ 2.5
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Quote:
Originally Posted by eyedeas View Post
Hows the progress man?
I just read all of your posts and its impressive to me that youre even attempting this!!
Thanks, ... so someone else is interest in this.... LoL.

The Original VW manifold flange has oval passages equal to about 1 5/8 inch diameter opening to the vales but they choked off the high end performance by using small intake runners smaller in diameter than 1 3/8 inches and gave it a plenum size of over 6 litres which helps the low end torque below 2500 RPM, but above that they reply on the runner length tuning to get the midrange.

The goals have changed as I have limited resources, I'm building it more for my needs, which is to say for track use, so performance and drivability in the 4K to 6.5K is essential; and not to rev to the stratosphere like the IE version.

One key feature that I'm adapting into the design is the ability to change/vary the runner lengths very quickly. I made some measurements and assumptions; then used this calculator to determine that the runner lengths will be between 8.5 to 10 inches (the 2 inch head port to valve distance is taken into account).
http://www.wallaceracing.com/runnertorquecalc.php

I can customize shorten the runner lengths to rev higher but will require the EI SRI Tune to provide the extended fuel and ignition timing way past the programmed fuel cut off, or limited by the availability or lack of availability of the maps.

One of the major challenge because i'm not using metal, is the cyclic loading from the damn thing vibrating and having an overhanging mass (moment) that contribute to cracking at the welds/joints.

EDIT: Thanks to anyone who contributed, BUT the PROJECT iS ON HOLD.
The materials I was using simply can't stand up to the chemicals (gasoline and oil) and heat. This explains why I could get pretty good results for a week but would encounter problems with cracking, creating multiple vacuum leaks shortly there after.
This is a hobby for me so, I'll continue in my free time and if/when I have something worth while I will share it with you.

Thanks

Last edited by MLue1; 05-07-2018 at 12:50 AM. Reason: PROJECT ON HOLD
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