 1.7 engine w/2.0 throttle body?, WTF? |
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| scrz914 |
 Mar 10 2008, 02:40 PM
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#1
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Member  Group: Members Posts: 397 Joined: 21-April 04 From: Santa Cruz, CA Member No.: 1,960 Region Association: Central California  |
My engine has the engine code "W" (early 70's) but has the square air cleaner and the vertical TB. The upright TB is for the 2.0, right?
Is there a reason the PO did this other than he just threw together what he had in his back yard. Honestly, it seems strong enough. But I don't see why he didn't add a bigger exhaust as well. I haven't checked the other components such as the ECU, MPS, Injectors, but wouldn't they have to be 2.0 as well to work with that TB? Where do I go from here? Thought I had a 2.0. Damn. (IMG:style_emoticons/default/ar15.gif) |
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| southernmost914 |
Mar 10 2008, 02:45 PM
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#2
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KEY WEST/HAVANA Tunnel Authority Group: Members Posts: 338 Joined: 16-October 07 From: Key West/ St. Augie, Fl USA Member No.: 8,234 Region Association: South East States 
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You may not have a GA case but it could still be a 2.0, look at your heads, intake manifold - heads, 3 or 4 bolt?
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| scrz914 |
Mar 10 2008, 02:55 PM
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#3
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Member Group: Members Posts: 397 Joined: 21-April 04 From: Santa Cruz, CA Member No.: 1,960 Region Association: Central California |
4 bolt.
I thought maybe bigger P/C were put on and the heads were reworked. But that's just wishful thinking on my part. |
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| scrz914 |
Mar 10 2008, 03:54 PM
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#4
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Member Group: Members Posts: 397 Joined: 21-April 04 From: Santa Cruz, CA Member No.: 1,960 Region Association: Central California |
So, has anyone heard of this combination? Is there an advantage/disadvantage?
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| 914Sixer |
Mar 11 2008, 03:22 PM
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#5
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914 Guru Group: Members Posts: 8,882 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region
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They may have used 1.8 914 or 2.0 bus heads, that way you do not have to change the exhaust. Yes, the valves could have been opened up and the crank and rods replaced There is only a little difference in the exhaust system. All the cases are the same. W case is usually in better shape than a GA case according to Jake.
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| r_towle |
Mar 11 2008, 03:27 PM
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#6
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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I guess if I was faced with this I would do two things.
First, either borrow or buy a wide band O2 sensor to determine what your Air/fuel ratio is as right now. You can go to a gas station and have them hook it up on a dyno to test this also. Then, if that checks out and you are not running to lean, you can drive it. The second thing I would consider is drop the motor and pull one of the heads. Measure up what you have, pistons, strok, and valve size. You may have a 2.0 liter, just not in the original case. Rich |
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| r_towle |
Mar 11 2008, 03:28 PM
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#7
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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As I was writing this, it occured to me.
Pull the number 3 plug, take a clear picture of the plug. Post it here. We should be able to tell if you are running to lean. That may be the easiest first step. Rich |
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| scrz914 |
Mar 11 2008, 09:57 PM
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#8
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Member Group: Members Posts: 397 Joined: 21-April 04 From: Santa Cruz, CA Member No.: 1,960 Region Association: Central California |
Rich,
Are you saying that the 2.0 TB in combination with 1.7 heads could cause unadjustable mixture? Or would it be the 2.0 TB with an early ECU. Hopefully this weekend I'll be able to get part numbers off all the FI components. This might give me a better idea of what's going on. If this motor is a 1.7, I can't wait to drive a 2.0 (or 2056). I'll check the plugs like you said. Tony |
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| Bleyseng |
Mar 11 2008, 10:11 PM
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#9
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Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
RichD is running a 1911 with 2.0L injection that I tuned the MPS on. It works just takes a little tuning.
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| orange914 |
Mar 11 2008, 10:57 PM
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#10
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http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California |
check the numbers on:
1] mps 2] ecu 3] distrbutor check the injector body color check the exhaust to see if they curve upward at the point each side connets to the muffler mike |
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| 914werke |
Mar 12 2008, 10:29 AM
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#11
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"I got blisters on me fingers" Group: Members Posts: 10,066 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest
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QUOTE(Bleyseng @ Mar 11 2008, 09:11 PM)  RichD is running a 1911 with 2.0L injection that I tuned the MPS on. It works just takes a little tuning. My setup started as a 1.7 updated P/C's to 96mm units then applied 2.0 heads and a complete FI & induction off a 73 (or 74) 2.0 including HE's & exhaust. Geoff tweased on the MPS & it runs STRONG! (IMG:style_emoticons/default/driving.gif) (IMG:style_emoticons/default/aktion035.gif) |
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