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Noahs944
Joined: 08 Dec 2015 Posts: 782 Location: Calgary, Alberta, Canada
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Posted: Tue Jun 14, 2016 10:09 pm Post subject: |
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Regarding the cam grinding, I'm referring to making the base circle smaller. When googling I found this and was impressed by the fellows answer... the very long answer... although not all applies to the Porsche engine. https://answers.yahoo.com/question/index?qid=20071019000014AA0T8uQ |
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XLR8
Joined: 30 Mar 2016 Posts: 143 Location: Byron Bay, Australia
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Posted: Wed Jun 15, 2016 10:46 am Post subject: |
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Noahs944 wrote: | Well all I said was I'm thinking about it. There are several other aspects that need research. Such as clutch/bellhousing/input shaft/ign/engine mounts/harness adaption, etc.
Common belief is the n/a CIS can be used for a built 2.0 (150-160 hp). Well that's stock 2.5 territory.
My exploration into the swap will reveal more. If you've already done this research then feel free to post the info. In the end I think I'll just rebuild the stock 2.0. (It's leaking and someone appears to have stripped out all of the allen bolt heads from one end to the other). Nice
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Apologies, I did not mean to discourage you AND I misread what you were planning on doing. I thought you were putting CIS into a 944!
I too dream of more power for my NA, but the $ and frustration that my research has uncovered seems to point to persisting with the NA. Just about everything else requires a full drivetrain swap ...
If you did put the 2.5 in the NA shell (+ crossmember + torque tube + tranny) then it's not a huge effort to put EFI onto that engine. Less stuff in the engine bay as well.
My $0.02 (having not done either). _________________ '81 Porsche 924 NA
'89 Eunos Roadster NA6
'06 Landcruiser HDJ100 |
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Noahs944
Joined: 08 Dec 2015 Posts: 782 Location: Calgary, Alberta, Canada
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Posted: Wed Jun 15, 2016 9:49 pm Post subject: |
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Absolutely no apology necessary mate. Perhaps I was too subtle.
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Update: I have it on good authority that the 79 928 intake manifold is too tall to fit under the hood of the '24/'44.
Last edited by Noahs944 on Thu Jun 16, 2016 9:00 am; edited 1 time in total |
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Power Tryp
Joined: 16 Apr 2009 Posts: 434 Location: Calgary, Alberta
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Posted: Thu Jun 16, 2016 4:27 am Post subject: |
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Neat read.
If you plan on doing head modification and cam work, boy have I got a deal for you on a decent head and a cam core to practice on.
Just let me know. _________________ Melanie - 1980 931
NoName - 1980 931 (seeking rebuild)
Green tartan interior, you don't see that on a Civic. |
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Noahs944
Joined: 08 Dec 2015 Posts: 782 Location: Calgary, Alberta, Canada
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Posted: Wed Jul 20, 2016 12:00 pm Post subject: Main Bearings? |
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Ummm, how does a guy find crankshaft main bearings for the 2.0? Seems like no one has them |
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Power Tryp
Joined: 16 Apr 2009 Posts: 434 Location: Calgary, Alberta
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Posted: Wed Jul 20, 2016 12:16 pm Post subject: |
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EBSracing doesn't have any? You may be relegated to ordering from Mittelmotor in Germany. _________________ Melanie - 1980 931
NoName - 1980 931 (seeking rebuild)
Green tartan interior, you don't see that on a Civic. |
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morghen
Joined: 21 Jan 2005 Posts: 8883 Location: Romania
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Posted: Wed Jul 20, 2016 4:44 pm Post subject: Re: Main Bearings? |
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Noahs944 wrote: | Ummm, how does a guy find crankshaft main bearings for the 2.0? Seems like no one has them |
what happend? _________________ https://www.the924.com |
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MikeJinCO
Joined: 08 Jun 2010 Posts: 1228 Location: Maysville, Colorado
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Posted: Wed Jul 20, 2016 10:19 pm Post subject: |
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I got some piston rings from EBS last week and Troy said he had the main bearings. _________________ Mike
'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild) |
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Noahs944
Joined: 08 Dec 2015 Posts: 782 Location: Calgary, Alberta, Canada
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Posted: Wed Jul 20, 2016 11:42 pm Post subject: Re: Main Bearings? |
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morghen wrote: | Noahs944 wrote: | Ummm, how does a guy find crankshaft main bearings for the 2.0? Seems like no one has them |
what happend? |
Nothing. Except Gramps is dripping a lot of oil. I can't tell exactly where it is coming from... so right now, my plan is to: repair the fuel system so he doesn't act up when hot. Once reliable, dis assemble the 2.0 and try to up his power out put by another 20%.
Thanks Mike and PT for the tips. |
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morghen
Joined: 21 Jan 2005 Posts: 8883 Location: Romania
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Posted: Thu Jul 21, 2016 12:26 am Post subject: |
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Is it smoking or is it leaking out? _________________ https://www.the924.com |
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Noahs944
Joined: 08 Dec 2015 Posts: 782 Location: Calgary, Alberta, Canada
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Posted: Thu Jul 21, 2016 12:16 pm Post subject: |
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Very minor smoking, but major oil leakage. As best I can tell, it's front crank seal, oil pan gasket and rear main dripping. All oil pan gasket and front pulley bolts are rounded out. Records show main bearings and rear main were done but... the workmanship is so crappy I don't trust any of it.
It's very possible I mis-diagnosed the head gasket a few months ago, as I didn't find actual damage to the gasket.
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GOOD NEWS: called EBS Racing and they have in stock std and oversize main bearings AWESOME.
Bad news is the wife told me I need to cough up $3000 for hail damage repairs... so I am re-assessing everything due to finances.
Honestly I like the 2.0 litre... it's a cute little engine & I think it has potential |
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ideola
Joined: 01 Oct 2004 Posts: 15548 Location: Spring Lake MI
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Posted: Thu Jul 21, 2016 12:57 pm Post subject: |
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Main bearings also here:
http://garage.ideola.com/prod-EngineRebuildKits.html#block
I provided the samples and went in with EBS to get that last run of bearings made, FWIW. _________________ erstwhile owner of just about every 924 variant ever made |
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Noahs944
Joined: 08 Dec 2015 Posts: 782 Location: Calgary, Alberta, Canada
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Posted: Thu Jul 21, 2016 2:14 pm Post subject: |
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Thank you for your valuable add, Dan!
Question: if you wanted to up the compression to say 11.5:1 (using stock pistons), is this possible on the na 2.0l by merely shaving the head, or is shaving the block required? |
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ideola
Joined: 01 Oct 2004 Posts: 15548 Location: Spring Lake MI
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Posted: Fri Jul 22, 2016 1:01 am Post subject: |
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Noahs944 wrote: | Question: if you wanted to up the compression to say 11.5:1 (using stock pistons), is this possible on the na 2.0l by merely shaving the head, or is shaving the block required? |
DO NOT shave the head! The NA head is a heron style head, meaning it is flat, with no combustion chamber in the head itself. You will not gain a single point of compression by shaving the head, you will only affect your ability to properly tension the timing belt.
Have you seen my compression ratio calculator?
http://garage.ideola.com/top-DL-CompressionRatioCalc.html
If you start with US-spec long block from 1980-82, you have 9.0:1 CR pistons to start with. Assuming you don't want to go to the expense of finding Euro-spec pistons, or swapping in something aftermarket or custom, this is your best starting point.
You can gain another 0.4 points of compression by using a Cometic .027" head gasket.
If you take the block down to 230.0mm, you gain 2 whole points of compression, so that would put you at 11.4:1.
So that's how you do it.
If you remove that much material from the block, you should consider an adjustable cam gear to dial in cam timing. _________________ erstwhile owner of just about every 924 variant ever made |
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Power Tryp
Joined: 16 Apr 2009 Posts: 434 Location: Calgary, Alberta
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Posted: Fri Jul 22, 2016 1:06 am Post subject: |
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Hey, I have exactly that short block sitting around taking up space. How funny is that? _________________ Melanie - 1980 931
NoName - 1980 931 (seeking rebuild)
Green tartan interior, you don't see that on a Civic. |
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