<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><br id="lineBreakAtBeginningOfSignature"><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br>Begin forwarded message:<br><br></div><blockquote type="cite"><div dir="ltr"><b>From:</b> Lyman Scherer <lymanazhd@yahoo.com><br><b>Date:</b> April 7, 2025 at 9:21:02 PM MST<br><b>To:</b> Dave Riddle <Dave@microworks.net><br><b>Subject:</b> <b>Re: [Fot] Video from yesterday at Arizona Motorsports Park</b><br><br></div></blockquote><blockquote type="cite"><div dir="ltr"><meta http-equiv="content-type" content="text/html; charset=utf-8">It is intake leakage.. with stock gasket (stainless covered with fiber material) have blown #4 and #1 ports at different events.<div> Have used same gasket on same BajaTR3 engine for 7 years, dozens of events, 1000’s of miles without failure!</div><div>Variable is: TR4 intake and headers that came with #65 car.</div><div>Systems checked: solid 150+ compression, plugs great! cones grey w/ no oiling, valve clearances not changing set .016” intakes .018” exhaust, timing & advance ok 20’ idle 32’ advance, carb jetting from past only richened main.</div><div>Solution? Crappy sealing surface clamping of intake/exhaust stud hardware. Or fab soft copper gasket?<br id="lineBreakAtBeginningOfSignature"><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On Apr 7, 2025, at 5:54 PM, Dave Riddle via Fot <fot@autox.team.net> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Yes on the Webbers. Fuel pressure seemed good as did the color of th eplugs<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-ligatures:standardcontextual">Dave Riddle<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;mso-ligatures:standardcontextual">602.692.5276<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> David Gott <triumphsix@yahoo.com>
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<b>Sent:</b> Monday, April 7, 2025 4:47 PM<br>
<b>To:</b> Dave Riddle <dave@microworks.net>; FOT (fot@autox.team.net) <fot@autox.team.net><br>
<b>Subject:</b> Re: [Fot] Video from yesterday at Arizona Motorsports Park<o:p></o:p></span></p>
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<p class="MsoNormal">Just because I’ve missed this myself and watched others do the same; check timing. I take it you are running webbers if you mention jetting? Curious about fuel pressure…<o:p></o:p></p>
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<p class="MsoNormal">Normally would sound like detonation if you lose midrange; possible if you have an intake leak even with low compression. What do the plugs look like?<o:p></o:p></p>
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<p class="MsoNormal">I’m likely stating the obvious things, but sometimes the simple is overlooked….<o:p></o:p></p>
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<p class="MsoNormal">Hope that helps,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Dave Gott<br>
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<p class="MsoNormal"><a href="https://mail.onelink.me/107872968?pid=nativeplacement&c=Global_Acquisition_YMktg_315_Internal_EmailSignature&af_sub1=Acquisition&af_sub2=Global_YMktg&af_sub3=&af_sub4=100000604&af_sub5=EmailSignature__Static_"><span style="font-size:9.0pt">Sent
from Yahoo Mail for iPhone</span></a><o:p></o:p></p>
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<p class="yahoo-quoted-begin" style="margin-top:0in"><span style="font-size:11.5pt;color:#715FFA">On Monday, April 7, 2025, 7:39 PM, Dave Riddle via Fot <<a href="mailto:fot@autox.team.net">fot@autox.team.net</a>> wrote:<o:p></o:p></span></p>
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<p class="yiv7680026821msonormal"><span style="font-size:11.0pt"><a href="https://youtu.be/MQjU3jhW7Y8" target="_blank">https://youtu.be/MQjU3jhW7Y8</a></span><o:p></o:p></p>
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<p class="yiv7680026821msonormal"><span style="font-size:11.0pt">Took the TR4 out in an HPDE3 Session to test how she’s handling. I like how she handles but we have developed a lean condition. Revs fall flat between 4-5k then come back between 5-6k. Changed
jetting and that did not really help. Neither did hotted plugs. Lyman checked valve adjustments. That was not the issue either. It is odd however that we are blowing out the intake gaskets but no issue with the exhaust gaskets.</span><o:p></o:p></p>
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<p class="yiv7680026821msonormal"><span style="font-size:11.0pt">Lyman figures we are running about 90 hp at the wheel. Hopefully putting it on a dyno next month will help find the lean issue and maybe some more hp from this low compression engine. This is
the motor (and 5 speed Toyota) that was in the Baja Car which needs low compression to deal with low quality fuel in Mexico. This fall a rebuilt high compression engine along with a 4 speed Triumph box will be installed.</span><o:p></o:p></p>
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<p class="yiv7680026821msonormal"><a href="http://www.microworks.net/" target="_blank"><span style="font-size:11.0pt;text-decoration:none"></span></a></p><div><a href="http://www.microworks.net/" target="_blank"><image001.jpg></a></div><o:p></o:p><p></p>
<p class="yiv7680026821msonormal"><b>Dave Riddle</b><o:p></o:p></p>
<p class="yiv7680026821msonormal"><span style="font-size:11.0pt">Business IT Consulting</span><o:p></o:p></p>
<p class="yiv7680026821msonormal"><span style="font-size:11.0pt">Office: 480.610.8234</span><o:p></o:p></p>
<p class="yiv7680026821msonormal"><span style="font-size:11.0pt">Cell: 602.692.5276</span><o:p></o:p></p>
<p class="yiv7680026821msonormal"><span style="font-size:11.0pt">eMail: <a href="mailto:dave@microworks.net" target="_blank">
<span style="color:#7B78FF">dave@microworks.net</span></a></span><o:p></o:p></p>
<p class="yiv7680026821msonormal"><span style="font-size:11.0pt">Website: <a href="http://www.microworks.net/" target="_blank">
<span style="color:#7B78FF">http://www.microworks.net</span></a></span><o:p></o:p></p>
<p class="yiv7680026821msonormal"><a href="https://partner.microsoft.com/en-US/" target="_blank"><span style="font-size:11.0pt;color:windowtext;text-decoration:none"></span></a></p><div><a href="https://partner.microsoft.com/en-US/" target="_blank"><image002.png></a></div><a href="https://www.acronis.com/en-us/" target="_blank"><span style="font-size:11.0pt;text-decoration:none"><div><image003.png></div></span></a><a href="https://www.clio.com/" target="_blank"><span style="font-size:11.0pt;text-decoration:none"><div><image004.png></div></span></a><a href="https://www.citycommunications.com/" target="_blank"><span style="font-size:11.0pt;color:windowtext;text-decoration:none"><div><image005.png></div></span></a><o:p></o:p><p></p>
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