Electronic Boost Controller

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Rennwagen1
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Post by Rennwagen1 » Oct Thu 25, 2007 9:05 pm

No problem. Your intercooler should be here soon. I will post juicy pics when it shows. But if it comes whilst I am at SEMA, then it will be a few days.
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Post by CBCGSXR1000 » Oct Thu 25, 2007 11:20 pm

That cool just hunt down the REVO crew and dont take no.
I dont want to drive out of state for it Zootown is fare enough.
Have fun if u see a cool boost cont. not over $600 let me
know just might get one soon. :twisted:
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Post by Rennwagen1 » Oct Fri 26, 2007 8:39 am

I have a Greddy Profec B Spec II in stock.
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Post by CBCGSXR1000 » Oct Fri 26, 2007 10:40 am

Is that a good one?I was looking at the
BLITZ DUAL SBS indiglo BC
APEXI AVC-R ELC. BC
TURBOXS DTEC-BC-PRO

I was wondering is it posible to put a twin turbo set up on jetta?
If so can u put a small turbo and a big turbo so the boost from
the smaller turbo(spolls faster) will charge the big turbo right?
I dont know if that would work do u know? :twisted:
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Post by Mikewire » Oct Fri 26, 2007 10:54 am

Chris you rock man...
I would like to hear Aeron's opinion on this one tho... :laughing:

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Post by CBCGSXR1000 » Oct Fri 26, 2007 11:15 am

Ya i want it crazy fast :twisted:
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Post by Rennwagen1 » Oct Fri 26, 2007 12:33 pm

Sequential boost and and does work, but I have no idea if it will work on a 1.8T at all.I friend and I designed a setup using a G60 and a Saab 900 turbo for his 88 Jetta. The mechanicals were there, but there would be a lot of plumbing under there. SO we gave up and drankl :beer: :beer: :beer: :beer: :beer: :beer: :beer: :beer: :beer: and then went back in the garage and really thought it would work really well, gave ourselves some high fives and went back to the :beer: :beer: :beer: :beer: :beer: :beer: :beer: :beer: :beer:
Woke up the next morning and never did anything about it. Just your typical Mk2 build up. I would start soing some research to see if anyone has done it.
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Post by CBCGSXR1000 » Oct Fri 26, 2007 1:29 pm

I will do that can u also ask some of the reps. at the show
They might know if its been done.
Thanks i would think it is posible will see :twisted:
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Post by Mill3niumThr33 » Oct Fri 26, 2007 3:16 pm

ermm. Sure its possible, but the time designing and tuning, not to mention the money required would be nuts. Stick to single IMO. You would have to get to perfectly matched turbos otherwise you will end up overspooling the smaller turbo and boom goes a turbo. I'd say slap a t3/t4 in there and be happy with 350-400 whp.
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Post by ValveFloat » Oct Fri 26, 2007 3:47 pm

I was wondering is it posible to put a twin turbo set up on jetta?
Anything is possible, but the real answer to that question is "why?"
If so can u put a small turbo and a big turbo so the boost from
the smaller turbo(spolls faster) will charge the big turbo right?
Not exactly. There is 'twin turbo' and 'sequential turbo' and they are very different things.
Typically twin turbos are used on engines that have two banks of cylinders, like a V8/V6. The main reason for it is plumbing. Trying to get all the exhaust from a V8/V6 to one turbo is usually not do-able without one bank having a long exhaust path which gives uneven back pulses to the ports, and loses a lot of heat before the turbo, which kills the efficiency. In a tight V8/V6 engine bay it is actually easier to plumb two turbos than one.
Sequential systems use a large and small turbo. Exhaust will be routed to the small turbo at lower RPM/boost and switch to the larger turbo as exhaust heat energy increases. The car I am most familiar with that does this is the 3rd generation RX-7, and quite frankly it doesn't work that well. Most RX-7 guys looking to make bigger power ditch the whole sequential system for one turbo. The smaller turbo won't "charge" the larger turbo. The whole idea of a turbo is it takes the heat energy in the exhaust and turns it into the pumping energy of the compressor. Once the exhaust has passed thru the turbine, a lot of its heat energy is gone, so you wouldn't want to pass it thru another turbine.
This is part of the reason a twin turbo set-up doesn't make sense on an inline four. With two turbos each is only getting half of the heat energy, and since the efficiency of a turbo is usually less than 65%, you have about twice the losses. So in the end you have two 65% efficient turbos, each getting half (or maybe even less because of exaust plumbing) of the heat energy, resulting in a much less efficient system.

The newer and better solution to sequential set-ups is the variable vane turbo.
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