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buguy
Samba Member
Joined: November 17, 2003
Posts: 4915
Location: Port Orange, FL
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 Posted: Thu Jul 29, 2021 10:41 am Post subject: Dyno strap location |
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| I'm taking the bug to the chassis dyno tomorrow. Trying to be as prepared as possible. I was curious where everyone was strapping the back of the car at? Guessing to be around 225-250hp. |
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slalombuggy
Samba Member
Joined: July 17, 2010
Posts: 9145
Location: Canada
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| Posted: Thu Jul 29, 2021 12:19 pm Post subject: Re: Dyno strap location |
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| Shackles off the rear transmission cradle (steel solid mount) |
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HotStreetVw
Samba Member
Joined: October 03, 2004
Posts: 871
Location: Wild West
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| Posted: Thu Jul 29, 2021 1:44 pm Post subject: Re: Dyno strap location |
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I've run them off the torsion housing. Its going to depend on the location of the tie downs on the floor. Just don't wrap them around your axles lol
_________________
4inBhore
50 Split - 2724cc NA. Haltech injected
62 Notchback - 2542cc Turbo WIP |
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buguy
Samba Member
Joined: November 17, 2003
Posts: 4915
Location: Port Orange, FL
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| Posted: Thu Jul 29, 2021 3:59 pm Post subject: Re: Dyno strap location |
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| Ok thanks. I've watched a few dyno vids and it looks like they move around kind of a lot. Looks sketchy! |
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Dauz
Samba Member
Joined: January 05, 2010
Posts: 1790
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| Posted: Thu Jul 29, 2021 4:51 pm Post subject: Re: Dyno strap location |
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| HotStreetVw wrote: |
| I've run them off the torsion housing. Its going to depend on the location of the tie downs on the floor. Just don't wrap them around your axles lol |
Same. JBA strapped mine to the torsion housing. |
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King_vw61
Samba Member
Joined: February 03, 2018
Posts: 1383
Location: Southern California
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| Posted: Thu Jul 29, 2021 5:30 pm Post subject: Re: Dyno strap location |
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Torsion housing. Mine barely moved at all. My muffler was kinda in the way. They used a chain on that side.
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1961 Ragtop, Autocraft 2783cc for street/strip 10k miles and counting...230.84 HP to the wheels thru Muffler 13.4 to 1 on E85
https://www.instagram.com/king_vw61/?hl=en |
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buguy
Samba Member
Joined: November 17, 2003
Posts: 4915
Location: Port Orange, FL
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| Posted: Thu Jul 29, 2021 8:40 pm Post subject: Re: Dyno strap location |
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| Thanks guys. Also i should edit, i was thinking 225-250hp to the flywheel. So i will more likely be in the 175-200 hp range to the wheel. |
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mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23937
Location: SHALIMAR ,FLORIDA
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| Posted: Fri Jul 30, 2021 10:17 am Post subject: Re: Dyno strap location |
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| just be sure to post your findings. |
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buguy
Samba Member
Joined: November 17, 2003
Posts: 4915
Location: Port Orange, FL
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| Posted: Fri Jul 30, 2021 10:41 am Post subject: Re: Dyno strap location |
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I made 8 pulls. 3rd was the best. 241hp at 5000 and 262tq at 4500 at close to 20 psi. Settled in to 18 psi for 221 and 243 at the same rpms. All with the belt on.
I have something going on with what seems like the BOV opening at 9-10 psi. So i will most likely replace it. It's a cheap eBay valve.
2054
MS efi
AA 35x40 heads cleaned up by me (know zero about doing it!) with out of the box dual springs
94mm "forged" Mahle pistons
Web 163 on a 112 lobe
Stock rods
Single 50mm tb
Small water to air intercooler
E85 |
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HotStreetVw
Samba Member
Joined: October 03, 2004
Posts: 871
Location: Wild West
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| Posted: Fri Jul 30, 2021 11:47 am Post subject: Re: Dyno strap location |
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Awesome. Congrats on the build.
_________________
4inBhore
50 Split - 2724cc NA. Haltech injected
62 Notchback - 2542cc Turbo WIP |
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buguy
Samba Member
Joined: November 17, 2003
Posts: 4915
Location: Port Orange, FL
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| Posted: Fri Jul 30, 2021 12:48 pm Post subject: Re: Dyno strap location |
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| Thanks. Im happy with the results for a cheap build. |
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Dauz
Samba Member
Joined: January 05, 2010
Posts: 1790
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| Posted: Fri Jul 30, 2021 2:07 pm Post subject: Re: Dyno strap location |
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| You sure it’s your bov opening and not your wastegate? I’m assume you’re venting to atmosphere.. is there change in the exhaust sound? |
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buguy
Samba Member
Joined: November 17, 2003
Posts: 4915
Location: Port Orange, FL
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| Posted: Fri Jul 30, 2021 4:00 pm Post subject: Re: Dyno strap location |
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| I'm not 100% sure. I thought it was the waste gate but on the dyno it did the same thing and i turned the ebc from 0 to 100. It boosts so fast it's hard to tell. I bought that BOV block off and will see if it still does it. Also it sure sounds like it's coming from the driver's side where the bov is. Waste gate is on the passenger side. Vented to atmosphere. |
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buguy
Samba Member
Joined: November 17, 2003
Posts: 4915
Location: Port Orange, FL
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| Posted: Fri Jul 30, 2021 5:54 pm Post subject: Re: Dyno strap location |
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Here is a printout of the last 3 pulls out of 8 total. This is 18 psi.
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74 Thing
Samba Member
Joined: September 02, 2004
Posts: 7390
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| Posted: Sat Jul 31, 2021 4:15 pm Post subject: Re: Dyno strap location |
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| What was your AFR during the pulls under boost? |
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buguy
Samba Member
Joined: November 17, 2003
Posts: 4915
Location: Port Orange, FL
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| Posted: Sat Jul 31, 2021 6:40 pm Post subject: Re: Dyno strap location |
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| It varies. Probably 12.5 to 11.5 afr. I'm on E85 so I'm a bit richer than gasoline. |
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