Return-Path: Received: from wb1-a.mail.utexas.edu ([128.83.126.134] verified) by logan.com (CommuniGate Pro SMTP 4.2b5) with ESMTP-TLS id 142978 for flyrotary@lancaironline.net; Mon, 07 Jun 2004 12:48:18 -0400 Received: (qmail 7253 invoked from network); 7 Jun 2004 16:47:45 -0000 Received: from dhcp-191-101.per.utexas.edu (HELO benefits3.mail.utexas.edu) (146.6.191.101) by wb1.mail.utexas.edu with RC4-SHA encrypted SMTP; 7 Jun 2004 16:47:45 -0000 Message-Id: <5.1.1.5.2.20040607113955.0252f680@localhost> X-Sender: msteitle@mail.utexas.edu@localhost X-Mailer: QUALCOMM Windows Eudora Version 5.1.1 Date: Mon, 07 Jun 2004 11:46:22 -0500 To: "Rotary motors in aircraft" From: Mark Steitle Subject: Re: [FlyRotary] Re: LS1 Coils - amp draw? In-Reply-To: Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=====================_243931531==.ALT" --=====================_243931531==.ALT Content-Type: text/plain; charset="us-ascii"; format=flowed Seems to me that we might have made a wrong assumption somewhere. I have an LS1 in my '99 Chevy pickup with eight of these coils. I just went out and checked the fuse panel. It has three ignition fuses, each 10A. I don't have a shop manual to check the schematic, but I've never had an ignition fuse blow, and they are only 10A. Logic would reason that only one of these circuits powers the coils. So, 10A for 8 coils. What's wrong here? Should I really design for 9A for each coil? Mark S. At 12:24 PM 6/7/2004 -0400, you wrote: >Hi Al, >I'm interested in Tracy's thoughts on this too. He said the high current >is only during startup, but if my fuse was accurate, then I drew > 15A at >5000 ft in cruise with 2 coils. >I think I'll be OK at 20A and 16G wire, but .... >Regards, >John Slade > > --=====================_243931531==.ALT Content-Type: text/html; charset="us-ascii" Seems to me that we might have made a wrong assumption somewhere. I have an LS1 in my '99 Chevy pickup with eight of these coils. I just went out and checked the fuse panel. It has three ignition fuses, each 10A. I don't have a shop manual to check the schematic, but I've never had an ignition fuse blow, and they are only 10A. Logic would reason that only one of these circuits powers the coils. So, 10A for 8 coils. What's wrong here? Should I really design for 9A for each coil?

Mark S.

At 12:24 PM 6/7/2004 -0400, you wrote:

Hi Al,
I'm interested in Tracy's thoughts on this too. He said the high current is only during startup, but if my fuse was accurate, then I drew > 15A at 5000 ft in cruise with 2 coils.
I think I'll be OK at 20A and 16G wire, but ....
Regards,
John Slade

--=====================_243931531==.ALT--