The Nando Build - Tear down thru First Start, Power for your budget....Both ways! |
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The Nando Build - Tear down thru First Start, Power for your budget....Both ways! |
jwalters |
Dec 6 2006, 07:02 PM
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#81
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Sooo Close....... Group: Members Posts: 1,677 Joined: 14-May 04 From: Huntsville, AL Member No.: 2,068 Region Association: Europe |
(IMG:style_emoticons/default/biggrin.gif) Hello all!
Welcome to the "NANDO BUILD"! From this first page onward the saga of one mans quest for Uber reliable power will unfold.. My good friend Nando (martinef1963 - club member here) has experienced engine power problems. He has made the decision to rebuild for two primary purposes: 1 - Must be stone reliable and all things working (heat) 2 - Must make more power than stock. I went down to his house which is about 45 minutes away and helped him pull the engine. We then loaded the engine is his beast and brought it back to my skunk works: "Exhaustive Solutions". And thus began the teardown - But let me back up for a moment. Nando was unsure of just where to go with his motor. Size wise, power wise, money wise, etc, etc. So I took him for a ride in Black Sabbath - Here is what comprises my motor build: 1.7 liters Original 1971 90mm pistons and cylinders (almost worn out, I just did not have the money for upgrade when building, which is what many of you, are in the same predicament) These have a fair amount of blowby, and are probably affecting my overall compression ratio by -2 points by guessing..so prolly around 7.1:1 at least. A SCAT C20 cam - Weber 40mm IDF's with stock vents, 120 mains and 45 idles with F7 tubes. Short manifolds 2 liter headpipes with monza manta exhaust 009 with crane optical Now I am the first to admit, my motor is not "new", nor is it at full power levels had I had the money to do it the way I wanted.... I'll just let Nando tell you all what HE thought----- Back to the motor: This is one reason why low power---- These are the really small valve 1.8/2.0 heads. W/o cleaning thay look to be pretty good, will know more when cleaned --- I have some bolt-on power mods I have been working on for quite some time now, and a few will be incorporated into Nando's engine. I am using Black Sabbath as my on-road test bed. Everything I do is backed up by road tests and chassis dyno tests.......Stay tuned for info and pics. (IMG:style_emoticons/default/cool_shades.gif) |
jwalters |
Dec 11 2006, 06:40 PM
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#82
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Sooo Close....... Group: Members Posts: 1,677 Joined: 14-May 04 From: Huntsville, AL Member No.: 2,068 Region Association: Europe |
(IMG:style_emoticons/default/sad.gif) Man, today has been rough - had company x-mas party last night. All day today I have been - (IMG:style_emoticons/default/icon8.gif) (IMG:style_emoticons/default/barf.gif) (IMG:style_emoticons/default/stromberg.gif) .........think someone forgot to wash after wiping...........
Ok, so now it is late in the day and feeling a little better - So I go out to the skunk works to try and get something accomplished. On another thread there was a little discussion about "oil sludge". This is what sludge is: and the following is what sludge will do for you............... Basically, sludge is formed from byproducts of combustion, not being lifted, carried out of, and filtered by the engine system. Two things: 1. Poor choice of chosen oil - quaker state aquired a very bad rap for causing so much sludge buildup and engine failure that: I almost "AVOID" at all costs to not even look at a bottle while in my favorite FLAPS -- I personally use an oil designed for air-cooled piston aircraft. EXXON multi-grade ashless dispersant - this stuff is made from the word go for high heat aircooled engines. No problems with seals being ate up or anything else for over a year of use now. But I change it very, very frequently. This oil will scrub the engine very much so and quickly dirty up the filter. I go about 2K max and change it - But everybody has their favorite oils to use - this is just mine- anyway: 2. high heat producing engines. In particular aircooled engines. Because of so much thermal expansion and cooling contracting, tolerances easily open up to the point of the part or system is compromised - allowing non-full performance of designed part and allowing too much seepage of cumbustion products into the crankcase. |
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