For My Next Trick, Minimum Cost /6 Converion, An experiment to show low cost done well. |
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For My Next Trick, Minimum Cost /6 Converion, An experiment to show low cost done well. |
Series9 |
Jul 29 2011, 09:27 AM
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#1
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Lesbians taste like chicken. Group: Members Posts: 5,444 Joined: 22-August 04 From: DeLand, FL Member No.: 2,602 Region Association: South East States |
It occurs to me that we've been throwing around some pretty big numbers in my 3.2 exploits of late.
I want to see how little I can spend converting Luckie's 914, but still do the job correctly. Here are the parameters: The engine has to be no larger than 2.4. This will save us the major expense of having to provide external cooling. The oil system will only be tank and lines. The 2.4 will use an early 901 911 flywheel, which I should be able to find used. It will also use a stock clutch. The goal on this one will be finished for $5k. I sourced a core 2.2T engine for $300. Since it was so little, I have quite a bit of room to fix whatever it needs, but 911 parts get expensive fast. I'm going with Megasquirt II fuel injection possibly on a custom-built intake manifold. This arrangement will not use the expensive 914/6 bellcrank conversion, but rather a simple 914/4 stock throttle cable. Current expenditures listed below: Engine mount: $90 2.2T engine (long block, delivered): $195 (cost adjusted for unneeded parts sold off) Megasquirt II ECU: $85 FI components (relay board cables and wiring): $219.25 Intake: $55 Headers: $168 Crank-fire pulley kit: $175 Blast headers: $10 POR-20 for the headers: $37.02 Current total $1034.27 (IMG:style_emoticons/default/sunglasses.gif) |
shoguneagle |
Jul 29 2011, 10:15 AM
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#2
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shoguneagle Group: Members Posts: 1,180 Joined: 3-January 03 From: CA, OR, AZ (CAZOR); New Mexico Member No.: 84 Region Association: Northern California |
Joe,
This looks like a great project. I really like the 2.2 and 2.4 engines. I do have a 914-6 oil tank which I could part with; only after you see pictures we will talk. Just setting here so you might as well have it; will need some money though, but not anywhere near the level for used tanks. It has been cleaned and pressured checked. I have the console, dipstick and housing somewhere around here along with the possibility of the metric adaptor from 27mm(?) for the oil tank. May have some other items you can use. I did find out a little more regarding the DMEs for the 1984-86 and 1987-89 3.2 engines. The essential difference is the 84-86 and nonprogrammable with 24 pins and programs burned into the chip; 87-89 is programmable with 28 pins. I am still unsure about the o2 sensor being just on the 87-89 and not on the 84-86. Hopefully, I will get a nonrepairable DME to tear apart to see what makes it tick and give me a basis to talk to knowledgeable experts. I find this very interesting. Excellent, excellent project. Let us see if we can help you and Luckie on this project. Will get back to you. Steve Hurt |
r_towle |
Jul 29 2011, 02:28 PM
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#3
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Custom Member Group: Members Posts: 24,624 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
I did find out a little more regarding the DMEs for the 1984-86 and 1987-89 3.2 engines. The essential difference is the 84-86 and nonprogrammable with 24 pins and programs burned into the chip; 87-89 is programmable with 28 pins. I am still unsure about the o2 sensor being just on the 87-89 and not on the 84-86. Both DME's are upgraded with new chips. The older DME's can be changed from the 2k format to the 4k format with a small amount of soldering...so you can use the later chips. See Steve Wongs 911 chip site. The largest difference between the two is the idle circuit sucks on the earlier DME's and the later ones smooth that out quite a bit. Either one will be smoothed out very nicely with the Steve Wong chip. He enriches the idle circuit and the lower RPM curve so street driving is more pleasant. Both the early and later versions use narrow band O2 sensors. These only kick in when hot, but if you delete that sensor, your MPG will suffer dearly (50%) Euro DME's have no O2 sensor and they have different A/F maps. Call Steve Wong...he can lead you in the right direction. Rich |
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