bus engine. ugh |
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bus engine. ugh |
rjames |
Oct 4 2018, 12:01 AM
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#1
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I'm made of metal Group: Members Posts: 4,111 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest |
You'd think that it wouldn't have taken me 11 years to look at the engine code. I have a '75 2.0. Just assumed the engine was original to the car.
Finally looked tonight and saw the following: So I have a bus engine? (IMG:style_emoticons/default/barf.gif) A 1976-77 2.0 liter Bus, according to the interwebs. Confused because I only see 3 studs on the intakes. If it was a bus engine, shouldn't there be 4 studs? What little I do know: PO had the engine rebuilt by a well-known local shop. Was rebuilt with Hydro lifters Oil dipstick located at the top. Engine pulls to 5500 rpm (I've read that bus engines aren't capable of this) I replace the flywheel with a 914 flywheel when I replaced the clutch. I thought I read where the busses use a different flywheel? What do I have, and is there any chance it was built to Porsche 2.0 specs? Now all I can think of is finding a proper engine. (IMG:style_emoticons/default/headbang.gif) |
cgnj |
Oct 4 2018, 05:17 AM
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#2
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Senior Member Group: Members Posts: 634 Joined: 6-March 03 From: Medford, NJ Member No.: 403 Region Association: None |
I see late 2.0 heads. Likely 2.0 motor built in a bus case. Hopefully it doesn't have bus pistons.
Carlos |
914Sixer |
Oct 4 2018, 05:44 AM
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#3
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914 Guru Group: Members Posts: 8,987 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region |
They probably just used the case only. The rest of the engine is a 914 2.0L internals.
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Dave_Darling |
Oct 4 2018, 12:32 PM
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#4
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914 Idiot Group: Members Posts: 15,048 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
The only difference that I can think of between the GD case and the GA case is the oil filler and dipstick. I would assume yours has a blanking plate bolted on to the lower-left-front corner of the case? Obviously the 914-style filler and dipstick have been added.
--DD |
Grelber |
Oct 4 2018, 12:52 PM
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#5
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Insert favorite Don Rickles joke here. Group: Members Posts: 690 Joined: 30-May 06 From: McKinney, Texas Member No.: 6,107 Region Association: Southwest Region |
I have a 2.0L built on a 1984 bus case. It pulls hard to 6,000. Might go further, but that's all I'll let it do.
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DRPHIL914 |
Oct 4 2018, 01:33 PM
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#6
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Dr. Phil Group: Members Posts: 5,805 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States |
you could get a COA, or whatever they call it now but they will verify if that engine number is matching for your car.
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rhodyguy |
Oct 4 2018, 01:55 PM
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#7
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,188 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
NWCR?
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SirAndy |
Oct 4 2018, 02:00 PM
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#8
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Resident German Group: Admin Posts: 41,813 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Hopefully it doesn't have bus pistons. (IMG:style_emoticons/default/agree.gif) Seen this more than once, low compression bus pistons and hydraulic lifters make for a great update! ^^^ That's sarcasm btw ... (IMG:style_emoticons/default/dry.gif) |
914werke |
Oct 4 2018, 02:01 PM
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#9
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"I got blisters on me fingers" Group: Members Posts: 10,540 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest |
I was wondering the same.
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rjames |
Oct 4 2018, 02:08 PM
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#10
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I'm made of metal Group: Members Posts: 4,111 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest |
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rjames |
Oct 4 2018, 02:12 PM
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#11
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I'm made of metal Group: Members Posts: 4,111 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest |
Hopefully it doesn't have bus pistons. (IMG:style_emoticons/default/agree.gif) Seen this more than once, low compression bus pistons and hydraulic lifters make for a great update! ^^^ That's sarcasm btw ... (IMG:style_emoticons/default/dry.gif) I picked up on it. (IMG:style_emoticons/default/dry.gif) Would the engine pull to 5500+ rpms if it had bus pistons? |
porschetub |
Oct 6 2018, 01:01 AM
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#12
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Advanced Member Group: Members Posts: 4,725 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
Hopefully it doesn't have bus pistons. (IMG:style_emoticons/default/agree.gif) Seen this more than once, low compression bus pistons and hydraulic lifters make for a great update! ^^^ That's sarcasm btw ... (IMG:style_emoticons/default/dry.gif) I picked up on it. (IMG:style_emoticons/default/dry.gif) Would the engine pull to 5500+ rpms if it had bus pistons? Depends really ? if it go's ok I wouldn't worry,not sure about the comment about compression holding back RPM????,the only limit you would have is the hydro lifters . I agree with comments about a replacement case ,seems to be that's what was done. |
bdstone914 |
Oct 6 2018, 08:08 AM
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#13
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bdstone914 Group: Members Posts: 4,670 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
@rjames
Have you did a compression check ? That can be an indication of what pistons are in it and what compression ratio was set to. They may have changed the cam for something better than stock. If it runs good leave it alone and run it. My $.02 worth. |
johnhora |
Oct 6 2018, 09:03 AM
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#14
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Senior Member Group: Members Posts: 873 Joined: 7-January 03 From: Derby City KY Member No.: 107 Region Association: None |
Robert..
You have a proper engine.... A Type 4 case is a Type 4 case....if you start with a good case no a problem. VW even used these engines for industrial use like running generators, etc. The heads, pistons, exhaust are where the magic is. Check you engine build sheet for part numbers. As mentioned from your pics....you already have 2.0L heads... see the 3 bolt intake and location of spark plugs And you are lucky to still have the FI. Drive it and stop worrying about a case number! |
Dave_Darling |
Oct 6 2018, 10:29 AM
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#15
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914 Idiot Group: Members Posts: 15,048 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
Would the engine pull to 5500+ rpms if it had bus pistons? Well, it could. The compression ratio doesn't affect breathing that much; the cam and valves and ports and exhaust and such are really what determine where the engine makes power. Lower compression more or less means less power throughout the RPM range. But frankly, it would be pretty weird for someone to swap over the heads from a 2-liter 914 and do the work to move the dipstick and such while leaving the low-compression Bus pistons in there... --DD |
rhodyguy |
Oct 6 2018, 11:05 AM
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#16
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,188 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
Northwest Connecting Rod had their own methods back in the day. The staking of the valve seats was a 50/50 situation.
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worn |
Oct 6 2018, 11:46 AM
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#17
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can't remember Group: Members Posts: 3,288 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest |
Would the engine pull to 5500+ rpms if it had bus pistons? Well, it could. The compression ratio doesn't affect breathing that much; the cam and valves and ports and exhaust and such are really what determine where the engine makes power. Lower compression more or less means less power throughout the RPM range. But frankly, it would be pretty weird for someone to swap over the heads from a 2-liter 914 and do the work to move the dipstick and such while leaving the low-compression Bus pistons in there... --DD (IMG:style_emoticons/default/agree.gif) The 2.0 heads are in my mind the special parts. You were happy before you saw the number? I would assume you have what everyone else has unless you notice less performance. |
rjames |
Oct 9 2018, 11:37 AM
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#18
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I'm made of metal Group: Members Posts: 4,111 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest |
@rjames Have you did a compression check ? That can be an indication of what pistons are in it and what compression ratio was set to. They may have changed the cam for something better than stock. If it runs good leave it alone and run it. My $.02 worth. Compression measured by the shop that did the ppi when I bought it was 135, 135, 130, & 150 Although numbers aren't great, they along with the feedback here seem to indicate the car isn't being moved down the road buy bus power. I'll continue to enjoy the car without stressing about it. That said, I have dreams of a fresh 2056 build in 3-5 years. Time to start saving $. |
VaccaRabite |
Oct 9 2018, 12:06 PM
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#19
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En Garde! Group: Admin Posts: 13,549 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
Thats not bad compression at all. Its strange that one cylinder has 15 more PSI then the others, but it would not stop me from driving the car.
Zach |
mepstein |
Oct 9 2018, 12:38 PM
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#20
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914-6 GT in waiting Group: Members Posts: 19,511 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
@rjames Have you did a compression check ? That can be an indication of what pistons are in it and what compression ratio was set to. They may have changed the cam for something better than stock. If it runs good leave it alone and run it. My $.02 worth. Compression measured by the shop that did the ppi when I bought it was 135, 135, 130, & 150 Although numbers aren't great, they along with the feedback here seem to indicate the car isn't being moved down the road buy bus power. I'll continue to enjoy the car without stressing about it. That said, I have dreams of a fresh 2056 build in 3-5 years. Time to start saving $. Buy someone’s hot 4 when they are converting to a 6. |
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