Draw through Baja build

With Turbo and Super charging you can create massive horsepower with vw motors.

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Maddward
Posts: 5
Joined: Thu Jan 23, 2014 10:06 am

Draw through Baja build

Post by Maddward » Tue Jun 19, 2018 1:08 pm

Well I finall finished up my baja draw through setup and now have some time to post. I lurk and read here daily and have gained so much knowledge off everybody on STF I figured I have contribute back. And I hope this does.
(sorry but pics are somewhat out of order and duplicated so match them up yourself haha)

It started out N/A and way undercarbed with some Weber 34ICT's. The engine ran good before but, as it always goes, I want more :)
Video is pre-turbo https://youtu.be/NWNyUav5-JU

I've had a carbon sealed AiResearch T3 50 trim in my garage for the last 5 years and decided to finally use it on this car. The Engine is a 94x69 with a W120 cam, 40x35 heads, 1.1 rockers on solid shafts, and 8.8:1 compression. The transmission is a 002 built by transaxle engineering with weddle internals. 3x3 arms, 930 cv's and 300m axles. I'm running charlynn powersteering too.

This is the engine before I started
Baja 9.jpg
Baja 10.jpg
So I started by taking off the exhaust to measure cylinders 1&4 top exhaust stud to stud and gave the measurement to CarCraft for my header. Mine was 19 3/4". CarCraft actually had a coated one in stock my size so I bought it. The fit was pretty good but i did have to open up the flange holes on cylinder #2 about .020" so it slid on easy.
Baja 11.jpg
Then I bought 2 weber sidedrafts, a 45dcoe and a 48spo/2, Rajay turbo, heated manifold, and intake manifold off craigslist. I wanted the 45dcoe and manifolds so I went through the 48 and sold it on the Samba, and the Rajay had just been rebuilt so I sold that on the Samba too. Funny is that I actually made $50 on the deal and kept what I wanted. To get it up and running I rebuilt the carb and set it up as follows thanks to help from Madmike!
30mm vents, 50F8 idle jets, 180 main jets(biggest I had to start with and now 160's) 170 airs, F16 E-tubes, 250 needle,0 exhaust jet, and 45 pump jets drilled out to 70's.
For ignition I just drilled and tapped a 6-32 thread in the weight stop on a spare 009 I had in the garage. I was able to adjust the screw to get my timing to 10 deg at idle and 24 deg full advance. This is just a starting point and I'm sure I'll be tweaking this later.
Baja 24.jpg
For the turbo oil feed I bought a 1/8npt to 3an fitting with a .065" through hole and put it in a brass T fitting where the oil pressure outlet goes. I'm using a 3/8npt to 1/2 ID barb fitting to drain into a fuel pump block off plate I had. It drains pretty good.
I'm using a 38mm turbosmart wastegate with a 7lb spring and I bought from CB Performance. I also bought a cnc'd top and check valve from pacific customs to make my holley 12-804 regulator boost referenced. I know it's not needed per say but I read and was told that the float bowl in the sidedraft can empty pretty fast at WOT so this will help fill it faster while under boost.

I bought a 5 bolt and wastegate flange from ATP turbo and fabbed my own exhaust. Then coated it with VHT flameproof in the can and baked it as the directions said too. It looks pretty good actually, but not as good as the header! I plumbed my full flow oil lines through the manifold and hooked up my old AEM failsafe wideband. I buttoned it all up last Saturday and this is how she sits now.
Baja 28.jpg
And here is a video of it idling and a quick 1st-3rd gear pull. I'm getting a full 7psi of boost but still need to come down a little on the mains I think. I saw 9.8:1 to low 10's on the gauge. What do you guys think my target WOT afr should be? I always shoot for 12.7:1 on a NA engine but this turbo is a new ballgame for me. Please excuse the shaky video and duplicate picture posts???
https://youtu.be/lx7TSqh7ODE
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rubenski
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Joined: Mon Jun 30, 2014 5:28 am

Re: Draw through Baja build

Post by rubenski » Tue Jun 19, 2018 8:24 pm

Verry nice!
Better to be blown than to suck!

madmike
Posts: 1483
Joined: Mon Jul 24, 2006 5:11 pm
Location: Atlanta,Michigan

Re: Draw through Baja build

Post by madmike » Wed Jun 20, 2018 5:35 am

Like I said Glad to Help :wink: :lol: ,Madmike

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petew
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Joined: Sat Oct 07, 2006 6:05 pm
Location: Sydney/Australia
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Re: Draw through Baja build

Post by petew » Fri Jun 22, 2018 4:26 am

Sweet setup. Never ceases to amaze me how you get away with an open exhaust and the like with street rego, but good on ya!

Re AFRs, 12.7 is not bad, but you should run a little lower. I go from 12.3 to 11.5 at on 14psi boost. I watched the vid inside the car. It's running WAY rich on boost. Ie. below nines.

Maddward
Posts: 5
Joined: Thu Jan 23, 2014 10:06 am

Re: Draw through Baja build

Post by Maddward » Fri Jun 22, 2018 10:16 am

Thanks!!
In California since it’s a ‘59 it doesn’t get inspected or smogged so I can get by without a muffler. I’m sure there’s a law that I need one but it’s way quieter than Harley Davidsons that run around here so I tell myself I’m ok haha
Thanks for the AFR suggestions!, the video is with a set of 160 main jets I have. I figured I should work my way from rich to lean to be safe. I do have some more jets coming in the mail in the next couple days so I’l start bringing that down.

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petew
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Joined: Sat Oct 07, 2006 6:05 pm
Location: Sydney/Australia
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Re: Draw through Baja build

Post by petew » Sat Jun 23, 2018 8:12 am

Maddward wrote:
Fri Jun 22, 2018 10:16 am
Thanks!!
In California since it’s a ‘59 it doesn’t get inspected or smogged so I can get by without a muffler. I’m sure there’s a law that I need one but it’s way quieter than Harley Davidsons that run around here so I tell myself I’m ok haha
Thanks for the AFR suggestions!, the video is with a set of 160 main jets I have. I figured I should work my way from rich to lean to be safe. I do have some more jets coming in the mail in the next couple days so I’l start bringing that down.
Don't get me started on Hardly Ablesons... Grrr. There's a double standard I hate. :evil:

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buguy
Posts: 1698
Joined: Wed Jan 26, 2005 11:53 pm
Location: Port Orange, FL

Re: Draw through Baja build

Post by buguy » Sat Jun 23, 2018 8:37 am

My neighbor has a Boss Hoss motorcycle with a 502 big block and open headers. He gets around with no trouble so I figure I'm ok with my veedub!

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