X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=eO9tc0h1 c=1 sm=1 tr=0 a=m0AEC+RiiqKPtGNj2ediMQ==:117 a=jpOVt7BSZ2e4Z31A5e1TngXxSK0=:19 a=x7bEGLp0ZPQA:10 a=KJlNJeHkcVsA:10 a=dq6fvYVFJ5YA:10 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=jJrOw3FHAAAA:8 a=aGabw9dAbC4nDFJ0cc8A:9 a=YIeT0BjK12haJjJG:21 a=HnBOy5izyF1dXZs9:21 a=QEXdDO2ut3YA:10 a=-FEs8UIgK8oA:10 a=NWVoK91CQyQA:10 a=2_-9m9JRtc_NfO1rGQQA:9 a=Ydtqn_4FFzrpHa_m:21 a=Sx9VKbwjEl9xVJt5:21 a=c13SY5490KmfdSX2:21 a=Urk15JJjZg1Xo0ryW_k8:22 a=lsIkP6lG2H4f0j7eDx0G:22 From: "Sam Hoskins sam.hoskins@gmail.com" Received: from mail-vs1-f41.google.com ([209.85.217.41] verified) by logan.com (CommuniGate Pro SMTP 6.2.12) with ESMTPS id 12699088 for flyrotary@lancaironline.net; Sun, 23 Jun 2019 16:43:08 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.217.41; envelope-from=sam.hoskins@gmail.com Received: by mail-vs1-f41.google.com with SMTP id u124so7267551vsu.2 for ; Sun, 23 Jun 2019 13:43:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=bE97QeEqHhVYgpjmdbkCRokWbGBZ6GoaW6blxdUR2gw=; b=MloHAaTR94XN7/nJCaCs6ShzxKffvAN+eca8plonlpn4V63LbfQaBFiVl9CS1TyF15 4rfu/gahw2eKamr0JN57DS8pDje4VfN0jNlq6mitrnBPIQDzs0kMJUbJZ4wm9XVgcCIl dWnF+fjuR1YkNWfxW+XTdtp30rBLogApkbrMJln2e8mEvsXXba3M8jJrI2YeBee8VVNn k3XPObmezgLNbqphfXjl8yeCKFsoAsdbONDx+tbnjSh4v7ZNzDuJEVu59Yutu5pmc0z0 hNI2EW9eyG+I7cfZFpvNYenh6nGJ2++43PYyiygaYXKZL53aSNE8VvWFF23q28zoGYlp PEHA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=bE97QeEqHhVYgpjmdbkCRokWbGBZ6GoaW6blxdUR2gw=; b=GQqVJsSLSUHyd5IQb5NMaXJy+4ryRvJ3iKPRpkFhMup9yR4sEGRrWvNUKABqxgEu0d smFbxdNyH5JzYPpRQRXj6hdGs9j4Gny7SJO1o5Ua1ub98lES3WSJdNv7h7GUQ5muNtZl VNy7wBdGmi7CZy27qwoXhiGxcxm8c4G5GkrEFnNuJd2SALokWwLgRdSDIdPf1kE6Z+ij YWmYg0CXmZjrr/jqzOru//+feDvZGUTMRO4dtIfpYwXqLJhUTudvw4sPx5Dx/rtL2BS9 hBoT7rj3pxOpoqhEvlnQ4jBybl6mcBeVmiR4dsaCvpWYAHx50Bg8Ro+mA/UHpJUwAUg+ EzDA== X-Gm-Message-State: APjAAAW77hd9NQ2G0CuHKZ8D5Xc5EAFcnIJAtW6NJf5xOFae/tDyaQyS VLpO0TrV0QD4mlYnpb9XXzKArnLdmOv+CzgeNJrU5Q== X-Google-Smtp-Source: APXvYqziKpUXLVykv7Y406LQ8ugjaKBt9yKSHEFuQLCpc8ZxgeEP03xeQKblbOOEMPpUbYbxGWE/mNhhC2arPgeXr+E= X-Received: by 2002:a05:6102:3c5:: with SMTP id n5mr25039695vsq.56.1561322570783; Sun, 23 Jun 2019 13:42:50 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Sun, 23 Jun 2019 22:42:38 +0200 Message-ID: Subject: Re: [FlyRotary] Throttlebody To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="000000000000362238058c03bd7e" --000000000000362238058c03bd7e Content-Type: text/plain; charset="UTF-8" Look up Jenvy throttle bodys in the UK with USA dealers. On Sun, Jun 23, 2019, 8:53 PM Le Roux Breytenbach breytenbachleroux@gmail.com wrote: > Hi Matt: You have mentioned in your email to the group about to replaced > the slide throttle with a 3 inch throttlebody.Is the 75 mm more or less the > correct size for a p port 13 B ? > I have p ported my housings with 44 mm diameter ports. The intake runners > is 2 inch to the p ports .Has also build a intake plenum "cilinder shape > intake plenum" > Just want to now what size throttlebody will be appropriate. > > Regards Le Roux Breytenbach > > I have a good one for you guys. I've been trying to get a slide throttle > to work. Lots of fixing to make it usable, mainly at lower RPM when the > suction is at it's highest. Lapped the outer plates flat, machined down the > thickness of the inside slide, doubled up all the bolts to seal fuel from > leaking, and stiffened up the throttle cable every few inches. BUT now that > I am taxing around, this issue is coming up and I think it has to do with > having the injectors before the slide throttle. I think... > > When I taxi (under 1100rpm prop) and start to step on the brakes, the > engine drops a few hundred RPM and struggles. If I pull power to idle to > slow down before tuning (600rpm prop), the engine will die. Unless I catch > it in time, and stab the throttle. The right brake is more pronounced then > the left. Even though the wideband is showing a quick lean condition, > I've tried riching up / leaning out the mixture at those lower rpm's to no > results. Once I get past 1200rpm prop and the engine is starting to breath, > no issues at higher powers. > > So we tried an experiment while idling and shook the plane left/right, it > reproduces the engine dieing. I did see a quick puff of black out the > tailpipe. That make me think at low idle, with the slide opening moves > right to left, the fuel is pooling at the bottom of the opening. The > shaking is causing raw fuel to make it's way in pass the opening. Drilled a > few small holes at the bottom of the slide to hopefully suck in any raw > fuel that tries to pool. It's helped a tiny bit, but if I shake the intake, > the engine still isn't happy at idle. > > I don't have a video of the engine running (will get it tomorrow), but > here's a video of the intake setup. > https://youtu.be/tuwBkDuKh9Q > > I'm tempted to remove the slide throttle and put in a standard 3" > throttle body on my intake box (ie, before injectors). Just want to get > your guy's thoughts if I'm on the right track. And if anybody is running a > slide throttle.? > > - Matt Boiteau > > Sent from my iPhone > --000000000000362238058c03bd7e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Look up Jenvy throttle bodys in the UK with USA dealers.= =C2=A0

On Sun, Jun 23, 2019, 8:53 PM Le Roux Breytenbach breytenbachleroux@gmail.com <flyrotary@lancaironline.net> wro= te:
Hi Matt: You have mentioned in= your email to the group about to replaced the slide throttle with a 3 inch= throttlebody.Is the 75 mm more or less the correct size for a p port 13 B = ?
I have p ported my housings with 44 mm diameter ports. The inta= ke runners is 2 inch to the p ports .Has also build a intake plenum "c= ilinder shape intake plenum"
Just want to now what size thro= ttlebody will be appropriate.

Regards Le Roux Brey= tenbach=C2=A0

I h= ave a good one for you guys. I've been trying to get a slide throttle t= o work. Lots of fixing to make it usable, mainly at lower RPM when the suct= ion is at it's highest. Lapped the outer plates flat, machined down the= thickness of the inside slide, doubled up all the bolts to seal fuel from = leaking, and stiffened up the throttle cable every few inches. BUT now that= I am taxing around, this issue is coming up and I think it has to do with = having the injectors before the slide throttle. I think...

When I taxi (under 1100rpm = prop) and start to step on the brakes, the engine drops a few hundred RPM a= nd struggles. If I pull power to idle to slow down before tuning (600rpm pr= op), the engine will die. Unless I catch it in time, and stab the throttle.= The right brake is more pronounced then the left.=C2=A0Even though the wideband is showing a quick lean condition, I&= #39;ve tried riching up / leaning out the mixture at those lower rpm's = to no results. Once I get past 1200rpm prop and the engine is starting to b= reath, no issues at higher powers.

So we tried an experiment whil= e idling and shook the plane left/right, it reproduces the engine dieing. I= did see a quick puff of black out the tailpipe. That make me think at low = idle, with the slide opening moves right to left, the fuel is pooling at th= e bottom of the opening. The shaking is causing raw fuel to make it's w= ay in pass the opening. Drilled a few small holes at the bottom of the slid= e to hopefully suck in any raw fuel that tries to pool. It's helped a t= iny bit, but if I shake the intake, the engine still isn't happy at idl= e.

I don't have a video of the engine running (will get it tomor= row), but here's a video of the intake setup.
I&= #39;m tempted to remove the slide throttle and put in a=C2=A0standard=C2=A03&qu= ot; throttle body on my intake box (ie, before injectors). Just want to get= your guy's thoughts if I'm on the right track. And if anybody is r= unning a slide throttle.?

- = Matt Boiteau

Sent from my iPhone
--000000000000362238058c03bd7e--