X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m22.mx.aol.com ([64.12.137.3] verified) by logan.com (CommuniGate Pro SMTP 5.0c2) with ESMTP id 710226 for flyrotary@lancaironline.net; Sat, 03 Sep 2005 13:14:15 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.3; envelope-from=Lehanover@aol.com Received: from Lehanover@aol.com by imo-m22.mx.aol.com (mail_out_v38_r4.1.) id q.1a5.3db38189 (4529) for ; Sat, 3 Sep 2005 13:13:22 -0400 (EDT) From: Lehanover@aol.com Message-ID: <1a5.3db38189.304b33b1@aol.com> Date: Sat, 3 Sep 2005 13:13:21 EDT Subject: Re: [FlyRotary] Re: "O" rings To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1125767601" X-Mailer: 9.0 SE for Windows sub 5017 X-Spam-Flag: NO -------------------------------1125767601 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 9/3/2005 11:19:15 AM Eastern Daylight Time, lors01@msn.com writes: Just read the Car & Driver article on long term test of RX-8. They saw the same long break-in period on the engine that I did. Compression was terrific from first run on but the power increased slowly over time. The CD car was significantly faster in the 1/4 mile after 40,000 miles than when new. I still don't know why this should be. The slightly wider side seals and exhaust shield on the rotors would not seem like they would cause this much difference. After a race engine rebuild the pros run in on the dyno for several hours. I just do an hour at fast idle (3,000 RPM) before using the engine hard. The engine runs best about the third weekend, because the sealing just keeps getting better to about then. A street engine will take much longer. Best sealing would be (my guess) after 6 months of gentle driving. The best ever power will be much further down the road. The sealing goes away a bit, but as the seals loose height, and spring tension, and the scrapers edges wear a bit flatter and become less effiecient, the total rotational drag goes down. Say it takes 5 foot pounds to rotate the new engine without plugs. The 60,000 mile engine will take less than 2 foot pounds. A 3 foot pound improvement over new. 3 pounds times best power RPM (8,500 RPM) = 25,500/5252= 4 free HP less a very small amount for slightly poorer sealing. A worn out ring package in a Miata (or any) engine will not seal like a new engine, but will always produce more power. The Formula Vees get 60+ HP from a stock (all stock pieces) 40 HP 1200CC VW motor. Formula Ford (1600CC) stock parts puts out over 100HP. Drag elimination is the secret. Lynn E. Hanover -------------------------------1125767601 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 9/3/2005 11:19:15 AM Eastern Daylight Time,=20 lors01@msn.com writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DVerdana color=3D#000000 siz= e=3D2>

Just read the Car & Driver article on long term test of RX-8.&nbs= p;=20 They saw the same long break-in period on the engine that I did. =20 Compression was terrific from first run on but the power increased slowly=20= over=20 time. The CD car was significantly faster in the 1/4 mile after 40,0= 00=20 miles than when new. I still don't know why this should be. Th= e=20 slightly wider side seals and exhaust shield on the rotors woul= d=20 not seem like they would cause this much=20 difference.

After a race engine rebuild the pros run in on the dyno for several hou= rs.=20 I just do an hour at fast idle (3,000 RPM) before using the engine hard. The= =20 engine runs best about the third weekend, because the sealing just keeps get= ting=20 better to about then. A street engine will take much longer. Best sealing wo= uld=20 be (my guess) after 6 months of gentle driving.

The best ever power will be much further down the road. The sealing goe= s=20 away a bit, but as the seals loose height, and spring tension, and the scrap= ers=20 edges wear a bit flatter and become less effiecient, the total rotational dr= ag=20 goes down.

Say it takes 5 foot pounds to rotate the new engine without plugs.= The=20 60,000 mile engine will take less than 2 foot pounds. A 3 foot pound improve= ment=20 over new.

3 pounds times best power RPM (8,500 RPM) =3D 25,500/5252=3D = 4 free=20 HP less a very small amount for slightly poorer sealing.

A worn out ring package in a Miata (or any) engine will not seal like a= new=20 engine, but will always produce more power. The Formula Vees get 60+ HP from= a=20 stock (all stock pieces)

40 HP 1200CC VW motor. Formula Ford (1600CC) stock parts puts out over=20 100HP.

Drag elimination is the secret.

Lynn E. Hanover

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