How many miles and what rpms are you guys recommending...
I was told 1,000 miles change the oil, and take it up to 5,000 rpm then at 1,500 miles drive it the way i normally would... what do you guys reconmend?.... Thanks Shay |
Thats a good bit longer than what I do. First 500 miles, staying under 4500 rpm(no boost if turbo), change the oil/filter, and gradually raise the redline until 1000 miles.
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Oh yeah and with 450 miles on it the compression number are in the lowwer 5's
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Originally Posted by '79rx7' date='May 3 2004, 09:07 PM
Oh yeah and with 450 miles on it the compression number are in the lowwer 5's
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Low 5's are real low, how's she starting???? Ours are usually in the 8.9 - 10's even with used housings...
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Originally Posted by Kathy Atkins' date='May 3 2004, 11:34 PM
Low 5's are real low, how's she starting???? Ours are usually in the 8.9 - 10's even with used housings...
The numbers are still low, but give it another 1000 miles, and see how it fares from there. |
The housing were in great shape, about a 9 on a 1-10 scale, the rotary doctor assembled the engine i trust his work... He had said these seals don't show the higher compression numbers for about 3,000-5,000 miles. and that's the compression on a factory mazda compression tester i'm not sure what you guys are using, but only once have i seen an engine with compression even in the 9's
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scarthart did some testing on the these seals for compression and found that they have the best compression after 3000 miles(if memory serves me correct).
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It was 5000 miles, actually. I have done a few tests on these seals and a couple others for personal information, and so far, I have been very pleased with the results from the RWS seals.
They have held 200 hp nitrous shots for 25+ seconds intervals for me (at 11.8:1 AFR and timing appropriately retarded), so I can't understand any issues being brought up about warping when the seals are properly fitted. |
Keep in mind that is when I tend to achieve peak compression, with testing done very 500 miles. You can vary your break-in periods and styles however your engine builder sees fit.
When using these seals, i use this: -Start the engine and let it idle for 30 minutes. -Change the oil and filter (this removes any bearing wear from new bearings, if used, and any material that was left in the oil passages after sonic cleaning, etc). - Idle the engine to 2000 for 90 minutes. - Initial tune for cruising load, 13.2-13.5 AFR under cruising load. - Drive 1000 miles with carry load, using lots of starts and stops, no hard launches, no WOT, no boost, and no engine rpms over 4000 rpm. - Change the oil and filter. - Drive 2000 miles, highway miles work fine, no hard launches, no WOT, no boost, and no engine rpms over 4500 rpms. - Change oil and filter. - Drive 2000 miles, highway is fine, easy launches, no WOT, boost under 5 psi, no engine rpms over 5000 -Change oil and filter, retune car for WOT and cruise AFR. |
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