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    Thread: New VR6 N/A Dyno Thread

    1. 05-28-2011 04:11 AM #51
      So how much less peak vs peak? If the difference is only by 2 or 3whp it's not that much if it's by 5-10whp it might be a bit of a problem.

    2. 05-28-2011 04:26 AM #52
      It depends on ALOT of variables. Cam specs, port velocity and flow, compression, all have to be taken into consideration, so its hard to say what the actual power difference will be on anysetup, with out real world testing.

      Too large of a port crosssection iin the intake manifold, and the port will go "dead" killing velocity, and making it very peaky in spots. Too small of a cross section, and you will hit "sonic choke".

      You have to take length of the runner, and cross section of the runner into mind when considering it.



      I really believe a GOOD manifold, a GOOD header, and a set of staggered cams is what these engines need to start making serious power. The VR is like having to deal with 2 diferent engines at once, with the staggered ports, and I believe that's where alot of the problem lies.

      All the manifolds I have seen from the "big guys" arn't that impressive for NA cars, mainly because they are geared at the FI crowd.

      A header, that separates the short/long exhaust pulses should be a huge plus, and I am mocking up one right now for myself. It will just group the 3 short ports with long branches, and the 3 long ports with short branches, then stay separate over the k-frame, then each dump out a 45* bend.
      I REALLY believe a good header is (one of the things) needed to get these past the "wall" that every VR seems to hit.

    3. Member Light on Fuel's Avatar
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      05-28-2011 07:30 AM #53
      Quote Originally Posted by JohnStamos View Post
      .... the "wall" that every VR seems to hit.
      Could this be why VW chose to no longer use the VR in the R32? IYO

    4. Member der_Architekt's Avatar
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      05-28-2011 09:52 AM #54
      Quote Originally Posted by Light on Fuel View Post
      Could this be why VW chose to no longer use the VR in the R32? IYO
      Technically the R32 is a VR because its still a narrow angle 6 cylinder. Most of the changes were made in the head and the block has more displacement.



      Mclaren for constructors trophy

    5. Member mattgreeneva's Avatar
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      05-28-2011 08:06 PM #55
      Well... Butt dyno results tell me I picked up a good amount of torque and top end power. Happy for what it is.. I wasnt too impressed with the TT Down Pipe.. I think $275 is a bit much for it... but whatever. Its saved me a lot of time porting the factory one. I also had to run through all the ports on the TT down pipe.. had a lot of burs and what not. With the ported manifold and the straight through resonator I have it sounds like a 24v... Which is awesome. However.. its way too loud. I will need to get an actual muffler for it I think. So here it is.. Stock manifold ported with harbor freight router and a sanding bit.. TT down pipe some heat wrap and a home made cat delete. (The holes are not perfectly round... )








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    6. Geriatric Member need_a_VR6's Avatar
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      05-28-2011 09:46 PM #56
      Quote Originally Posted by JohnStamos View Post
      A header, that separates the short/long exhaust pulses should be a huge plus, and I am mocking up one right now for myself. It will just group the 3 short ports with long branches, and the 3 long ports with short branches
      Think about the firing order and then re-run that idea.

      I have never been a fan of the staggered cams. It just seems much easier to make the manifolds "right" then bother with it.

      Nice manifold porting though! Make sure you port inside the collector of the tt dp. You want the necked in section no smaller than 2.25".
      Last edited by need_a_VR6; 05-28-2011 at 09:48 PM.
      -Paul
      1995 GTI VR6 - Retired - 12.90@106 R32 power - 12.833@106 12v power
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    7. Member Light on Fuel's Avatar
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      05-29-2011 08:24 AM #57
      Quote Originally Posted by der_Architekt View Post
      Technically the R32 is a VR because its still a narrow angle 6 cylinder. Most of the changes were made in the head and the block has more displacement.
      I know it's a VR, I was referring to VW replacing the R32 with the Golf R, which is basically the same car but with a better weight distribution and a turbo 4 instead of the VR.

      http://www.roadandtrack.com/tests/im...kswagen-golf-r


      Quote Originally Posted by der_Architekt;71797448[I
      Mclaren for constructors trophy[/I]
      I absolutely agree! They will definitely take the constructors because Webber isn't pulling his weight this season. I like Hamilton, Button is...eh. He only won the WDC because of Brawn's trick diffuser (even Rubens was fast in that car). I like the McLaren brand and hope they take the WCC. Just as long as Ferrari, specifically Alonso, walk away empty handed, I'll be happy.

    8. Member mattgreeneva's Avatar
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      05-29-2011 09:19 PM #58
      OK.. so I ran at Bug Out on the 1/8th mile track today. I am satisfied yet slightly disappointed. Being a noob to drag racing I tried to learn as fast as possible through experience but ended up screwing myself in the end.

      First run. I launched it.. Big mistake. Spun through every gear.. Speedo said 110 mph when I went through the finish line.
      Results:
      R/T: .671
      60': 3.119
      1/8: 12.858
      MPH: 59.09

      Second run. I didn't launch it. Feathered it through First and got on it after that. Won this race against a VR Corrado
      R/T: .782
      60': 2.549
      1/8: 10.078
      MPH: 72.70

      Third run. This is my first time bracket racing.. So I didnt fully understand the Dial in time thing.. I thought I had to put down my best time.. So I did. 10.078. I screwed myself.
      R/T: .743
      60': 2.496
      1/8: 9.938
      MPH: 73.57

      My opponent ran a 10.460 So I got to the finish line faster... but I ran faster than my dial time.. So I was eliminated.

      Then I learned how to work the dial time talking to other people..

      So I need a diff and some sticky tires... Then I will try this again.
      @mattgreenevw

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      05-29-2011 09:39 PM #59
      1994 B3 VR6, GIAC chip, stock cams, CAI, deleted A/C if that matters, 2.9 clone manifold, chains @ 170k:





      (iPhone dyno )

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      05-30-2011 09:29 AM #60
      ^I knew it would only be a matter if time before someone posted a dynolicious run. But I'm slightly confused as to how it shows 180hp but the 1/4 mile was only an 18? Is it because it was just a HP run? I downloaded the app but I haven't used it yet.
      Last edited by Light on Fuel; 05-30-2011 at 09:44 AM.

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      05-30-2011 04:00 PM #61


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    12. Member mattgreeneva's Avatar
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      06-01-2011 05:49 PM #62
      Keep the dynos coming!

      *I dont know how accurate the iphone dyno is...
      @mattgreenevw

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      06-02-2011 08:24 AM #63
      Quote Originally Posted by mattgreeneva View Post

      *I dont know how accurate the iphone dyno is...
      It's surprisingly accurate. Road & Track, Car and Driver and Grassroots Motorsports have all given it the thumbs up. Since there is a variance between the different dyno's, this is just another to add to the list. It's definitely more consistent than my cousin's G-Tech and that consistency is helpful for gauging whether or not you've gained any HP. is it extremely accurate doubtful. But it can provide consistent data to work from, until you get your car to a real dyno, that is.

    14. Member TDI Driver's Avatar
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      06-02-2011 10:04 AM #64
      Quote Originally Posted by Light on Fuel View Post
      It's surprisingly accurate. Road & Track, Car and Driver and Grassroots Motorsports have all given it the thumbs up. Since there is a variance between the different dyno's, this is just another to add to the list. It's definitely more consistent than my cousin's G-Tech and that consistency is helpful for gauging whether or not you've gained any HP. is it extremely accurate doubtful. But it can provide consistent data to work from, until you get your car to a real dyno, that is.
      Now I feel really tempted to run the app while on our dyno at NGP, just to see how accurate it is.

    15. Member mattgreeneva's Avatar
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      06-02-2011 10:07 AM #65
      I say that because according to his dyno we have the same hp. However his 1/8th mile time is a lot slower than mine. I have a full interior right now so unless he has dead bodies full of lead in his trunk I don't see him running that slow. I think the 1/8th mile time is right since that can be judged by time and a gps. I don't think the dyno or hp side is as accurate as a real dyno.

      Just a thought.

      Im sure the dynolicious dyno is all math. The computer program assumes it takes 180hp for a X,000 lbs object to travel from point a to point b in a certain amount of time
      @mattgreenevw

    16. Member Light on Fuel's Avatar
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      06-02-2011 11:19 AM #66
      Quote Originally Posted by TDI Driver View Post
      Now I feel really tempted to run the app while on our dyno at NGP, just to see how accurate it is.
      Please! Do that! I am in no way an advocate for Dynolicious. But i found the G-Tech to be wildly inconsistent in comparison to Dynolicious.

      Even if the Dyno'ls is off by 50hp, as long as it is consistent you can see if you've gained or lost HP based on it's reading constancy, and to be used as a benchmark. However, if you want a true HP reading you'd have to put it on a real dyno.

      Although, now that I think about it. Running at the same time won't work because it is triggered by the G's on take off. Like Matt said, point A to point B. You can, however, try it afterwords and see what it reads. If you can, please post any differences in both readings so that we can have a better gauge of it's accuracy, or inaccuracy.
      Last edited by Light on Fuel; 06-02-2011 at 11:24 AM.

    17. Member Light on Fuel's Avatar
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      06-02-2011 11:29 AM #67
      Quick question: How much does a GTI weigh with a full interior (minus the back seats) and a full tank of gas? I need to know to put the weight of the vehicle in the dynolicious and I don't have access to weight plates. Thx.

    18. Moderator root beer's Avatar
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      06-03-2011 12:12 PM #68
      Probably 2650

    19. Member Light on Fuel's Avatar
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      06-03-2011 02:10 PM #69
      Quote Originally Posted by root beer View Post
      Probably 2650
      Seriously? I thought it would've been more cos I remember my Bentley (when I had it) said GVW was around 2999lbs. I just want to be sure cos I don't know how close it is to exact.

    20. Moderator root beer's Avatar
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      06-03-2011 02:19 PM #70
      2650+driver

    21. Member Light on Fuel's Avatar
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      06-03-2011 03:08 PM #71
      Quote Originally Posted by root beer View Post
      2650+driver
      That sounds good to me. Thx

    22. Geriatric Member need_a_VR6's Avatar
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      06-03-2011 04:38 PM #72
      I don't think the software will work if the car isn't moving...

      Stock head/block, ITBs, 268s, standalone



      Forgot I had that one saved.
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    23. Member wilsfox's Avatar
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      06-04-2011 04:50 PM #73
      Anyone in here dyno on a Dyno Dynamics dyno?
      I ran mine on one and it put down 170whp. The dyno tech said that it was a 35% drivetrain loss dyno, and that I am somwhere around 230Crank hp. I would like to get up on a dyno jet so I can realistically compare to many of you on here.

      P&P
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      06-04-2011 07:32 PM #74
      mine was done on dyno dynamics
      my best was this run which is roughly 180 whp
      i was expecting at least 190 for the work iv done.

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      I just ran my 1995 jetta on the dump and got 155 hp and 154 tq. It's got 103,xxx miles and no muffler and a spectre air filter

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