S2000 Under The Hood S2000 Technical and Mechanical discussions.

vacume with ITB"s

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Old Dec 13, 2005 | 06:04 PM
  #21  
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[QUOTE=turbo_pwr,Dec 13 2005, 06:10 PM]Race Miata, on the dyno there was virtually no difference between running filters and not running filters.
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Old Dec 13, 2005 | 06:08 PM
  #22  
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Originally Posted by turbo_pwr,Dec 13 2005, 06:10 PM
We used TPS to tune the ITBs
The best is to use TPS and MAP with TPS-blend (e.g. use more TPS at lower revs).
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Old Dec 13, 2005 | 07:42 PM
  #23  
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I understood that you couldn't use the stock ecu with ITBs but reading these posts it seems that some of you seem to be running stock ecu. Am I misreading this?

Would you recommend ITBs for a race car? I'm thinking on something like an Ultralite that I don't have class problems at the track.
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Old Dec 13, 2005 | 09:00 PM
  #24  
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Stand-alone is a must!
Stock ECU will not work.
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Old Dec 13, 2005 | 10:05 PM
  #25  
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That's what I thought but then I began to think/hope that the vacuum reservoirs etc. were the way to make it work.

Ok, back to my main question. Turbo_pwr said he wouldn't recommend doing it again. Would that just be bang for the buck on a stock car or wouldn't do it even on a race car?

Would you get 99% of the benefit just by using the standalone and therefore there's little need to spend the extra dough on the ITBs?
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Old Dec 14, 2005 | 05:39 AM
  #26  
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Originally Posted by brent_strong,Dec 13 2005, 02:17 PM
Probably the best bet is to use a vacuum reservoir/can. Basically string all the TBs together with fittings/vac lines and run these to a common sealed canister. Then run anything you need vacuum for off of this. Of course, since the TBs provide much less restriction, the overall vac you can pull will be less than stock, but it should be enough to run most things.
So basiclly tape all 4 throttle bodies run 4 seperate vacume lines to a moroso vacume canister and distribute the vacume accordingly. My only question is if the TWM bodies do not have vacume what works the brakes on the car?
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Old Dec 14, 2005 | 06:26 AM
  #27  
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They don't necessarily need to be separate, but you have the right idea. I think most run vac lines like this:

1-->2-->3-->4----------->Canister

But running them singly should work as well. If I think of it, I'll ask my roommate for an opinion, he's messed with ITBs a good bit on some race cars.
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Old Dec 14, 2005 | 06:38 AM
  #28  
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what do you think of a vaume booster from moroso
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Old Dec 14, 2005 | 08:50 AM
  #29  
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I Just got off the phone with Hank from TWM Induction, He showed me some pics on the ITBS where there is a vacume port for the brakes. Now my question can this be T"d in to work the a/c and heat?
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Old Dec 14, 2005 | 03:06 PM
  #30  
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The AC and heat do not use vacuum.
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