Upgrading to ROW 4.7S engine
Thread Starter
Racer
Joined: Mar 2005
Posts: 329
Likes: 6
From: Tulsa, Oklahoma
Upgrading to ROW 4.7S engine
I am looking at replacing the stock 4.5l engine in my 79 Euro with a twin distributor ROW 85S engine.
I am trying to get a list of what would need to be changed out for this conversion and here is what I have so far:
Engine cross member and mounts
Engine wiring loom
Engine bay wiring loom and 14-pin connector
Central electrical panel
Fuel pump
Coil
Exhaust system
Anything I am missing?
Would appreciate hearing from anyone that has done this upgrade.
Thanks in advance, John
I am trying to get a list of what would need to be changed out for this conversion and here is what I have so far:
Engine cross member and mounts
Engine wiring loom
Engine bay wiring loom and 14-pin connector
Central electrical panel
Fuel pump
Coil
Exhaust system
Anything I am missing?
Would appreciate hearing from anyone that has done this upgrade.
Thanks in advance, John
Nordschleife Master
Joined: May 2012
Posts: 5,222
Likes: 432
From: Thousand Oaks California
Just use the engine sans the ignition system and fuel injection system and swap your stuff over.
It will drop right in at that point. You also don't need to change to the later mounts. The block has the holes to use the solid mounts and shocks.
It will drop right in at that point. You also don't need to change to the later mounts. The block has the holes to use the solid mounts and shocks.
Thread Starter
Racer
Joined: Mar 2005
Posts: 329
Likes: 6
From: Tulsa, Oklahoma
The 85S engine is local to me and is complete so logistically it makes sense. Just trying to work out all the bits I need to buy along with the engine and brains. The CIS hybrid concept is interesting but the throttle body and intake runners on my car are a smaller diameter than on the S models so would lose some HP there also. Also not confident in my ability to troubleshoot rough running problems with CIS if I mix and match so will likely take the all or nothing approach.
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From: Clemson, SC
Look into the cam profiles of your 4.5L vs the 4.7L you're moving toward. Using the cams from the 4.5L might give you higher performance. That's what I did when installing an '83 4.7L (non-Euro) into my' 79 non-Euro. In my case, the 4.5L cams have higher lift and duration so I've ended up with a tiny displacement bump, higher compression ratio, and better cams. My car has a 928MS Powerdyne Stage 2 supercharger on it too.
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Joined: Mar 2002
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From: Texas
Look into the cam profiles of your 4.5L vs the 4.7L you're moving toward. Using the cams from the 4.5L might give you higher performance. That's what I did when installing an '83 4.7L (non-Euro) into my' 79 non-Euro. In my case, the 4.5L cams have higher lift and duration so I've ended up with a tiny displacement bump, higher compression ratio, and better cams. My car has a 928MS Powerdyne Stage 2 supercharger on it too.
Kiwiokie has a 4.7L Euro engine that already has great cams, so there will be no need for him to change cams.
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From: Clemson, SC
That's not what his initial post says - it says he has a 4.5L '79 Euro and is looking to install a 4.7L ROW motor into it, unless I'm reading it wrong. You recommended he go with a later 4.7L Euro motor instead, but I don't think that's one of his current considerations or something he already has.
Rennlist Member
Joined: Mar 2002
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From: Texas
That's not what his initial post says - it says he has a 4.5L '79 Euro and is looking to install a 4.7L ROW motor into it, unless I'm reading it wrong. You recommended he go with a later 4.7L Euro motor instead, but I don't think that's one of his current considerations or something he already has.
His original 4.5 cams would have definitely been better than the cams from a US 84 engine, but I was suggesting that he use an earlier (80-83) ROW Euro 300HP engine which uses CIS injection just like his original engine and would make the swap far less complicated.
Race Director
Joined: Sep 2004
Posts: 16,271
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From: Stockton, CA
I agree a CIS Euro would be an "easier" conversion but you will gain performance with the Euro S LH setup once complete. Another idea is to make a 5L hybrid euro out of an 85-86 USA short block. There is no replacement for displacement!
Thread Starter
Racer
Joined: Mar 2005
Posts: 329
Likes: 6
From: Tulsa, Oklahoma
Yes I currently have a ROW (Euro) 4.5l CIS engine and have the opportunity to purchase a ROW (Euro) 4.7l LH injection engine. I have CIS on my 911SC and it works great but have read many horror stories of people rebuilding their CIS systems with new and rebuilt components and struggling to get it to run right. This pushes me towards LH even though it seems it will be a lot more work.