HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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1984 Gen IV 5.3 Swap

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Re: 1984 Gen IV 5.3 Swap

Post  superman22x on Mon Jul 18, 2016 6:44 am

Worked a little this weekend on the car. Got my CNT fuel pump sort of installed. I need to replace the feed line to the pump, and figure out how to mount the pump. The stock pump is slightly smaller, so I can't quite get the new pump into the stock location without an interference issue with the tank. For now the pump is hanging in the back so I could test fire the engine. It runs, but only for 2 seconds and then shuts off. Going to look into this a bit more tonight. Could be the MAF. It's a GMPP controller, so it shouldn't be VATS.

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Re: 1984 Gen IV 5.3 Swap

Post  superman22x on Fri Jul 29, 2016 11:21 am

Got the car running and not dying out now. Got the proper MAF sensor installed. Installed O2 sensors as well. I had bought a nearly complete C6 corvette exhaust on craigslist, and used that off the headers. I only have about 10" of tube off the headers right now, but it was simple to do, and both pipes point nearly straight back, so the rest of the exhaust will be easy.

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Re: 1984 Gen IV 5.3 Swap

Post  FrostedFlakeJake on Fri Jul 29, 2016 12:37 pm

Nice progress Smile

Hoping i can catch up to you!

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Re: 1984 Gen IV 5.3 Swap

Post  superman22x on Fri Jul 29, 2016 2:52 pm

You might catch up pretty quick here... Unfortunately, I have a leak from the oil pan or oil lines leaving the pan. I think I have a leak where the pan meets the rear of the block and the rear cover. I reused the oil pan gasket I got with the engine, but I'm thinking that was a mistake... I plan to drop the pan and replace it one of these days and add some RTV. The SummitRacing oil pan I have does not seem to be of the highest quality either, so maybe it isn't flat enough to seal around the oil filter ports.

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Re: 1984 Gen IV 5.3 Swap

Post  superman22x on Sun Sep 25, 2016 11:38 am

Ok, been a while since an update.  No more oil leaks.  However, I do have a power steering leak.  The Russell 16mm to 6an fitting from the hydroboost to the rack is leaking.  I put it in there without an Oring or crush washer, so I think that's the issue.  I think a crush washer is the proper piece to seal that.  I had some issues with the main shaft in the torque tube moving on me.  I thought I had everything on the engine ready to go, got the transmission jacked up into the car and realized the main shaft had pushed back an inch...  Finally got that set and the transmission reinstalled now.  
I ran the engine until the thermostat opened and the first fan kicked on.  Using the Porsche fan system for an 84, is there a low and high fan speed setting?  Only one fan kicked on, and I guess I'm unsure if that's because it was only the first stage, or because the other fan isn't working.  The one fan was enough to drop the temperature back down until it shut off again.

I also decided to mock up my exhaust tips. I have the quad tips from a C6 corvette. For a muffler I am planning on ordering a Magnaflow dual in dual out. I'll hopefully get some pictures of this in a week or two.

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Re: 1984 Gen IV 5.3 Swap

Post  Hotrodz of Dallas on Mon Sep 26, 2016 9:00 am

I usually put a crush washer and a small amount of sealer on the threads to get the fitting to stop leaking.

Both fans should run at the same time. It is a low and high speed system. Each fan has its own fuse. There is only one relay and one resistor for both fans.
Try this link to trouble shoot your fans. [You must be registered and logged in to see this link.]
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Re: 1984 Gen IV 5.3 Swap

Post  superman22x on Mon Sep 26, 2016 1:01 pm

Hotrodz of Dallas wrote:I usually put a crush washer and a small amount of sealer on the threads to get the fitting to stop leaking.

Both fans should run at the same time. It is a low and high speed system. Each fan has its own fuse. There is only one relay and one resistor for both fans.
Try this link to trouble shoot your fans. [You must be registered and logged in to see this link.]

Got a crush washer coming. I threw an Oring on for now that seems to be holding, but a crush washer seems like the proper piece.

Reading that about the fan, seems having only the driver side come on is right. The passenger and high speed driver side setting only happens when AC is turned on. Since I don't have AC, it seems they will never come on then. Might be good for me to add a switch to that leg of the relay so I can trigger both fans on high if needed.

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Re: 1984 Gen IV 5.3 Swap

Post  Hotrodz of Dallas on Mon Sep 26, 2016 3:07 pm

You could add a second relay that would turn on the second fan when the first fan comes on.
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Re: 1984 Gen IV 5.3 Swap

Post  superman22x on Wed Sep 28, 2016 9:49 pm

Yeah, that would be pretty simple.  I'll save it all for the winter, I may end up changing fans altogether.  I guess someone already swapped in the 6 blade fans in the past at least.  

In other news, I nearly completed my dual 2.5" exhaust. It's ugly under the car... but it is functional.  I used most of a used C6 Corvette exhaust system along with about $15 worth of straight pipe from O'rielys to get to the muffler.  So for the price, I'm happy.  And I even have quad tips!  The picture isn't great, garage is a mess and so is the car.  The passenger side tip isn't finished yet.  It's tacked together, but needs a hanger welded on, joints finished, and some paint.  
The muffler I bought was a dual in dual out Magnaflow.  I've only run it briefly on the jack stands.  I'm hoping this weekend to take the maiden voyage up and down the dead end street I live on.  Unfortunately, the only road that connects is a much busier road, so I don't want to take it out there until I'm sure it runs decent and doesn't overheat/melt anything in the engine bay.    
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In removing the rear bumper rubber pieces, one broke all three studs off. I'm thinking of just filling in the slots and making the bumper smooth. Two problems I have though: the little plastic pieces on the ends have slots that would need filling as well. Has anyone done this? Other problem, the bolts that hold those on are just spinning in their slots as well. So I might need to cut those off...

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Re: 1984 Gen IV 5.3 Swap

Post  superman22x on Mon Oct 03, 2016 9:31 am

I drove the car down the street for the first time yesterday. Seems a little delay in throttle response. But that is probably just due to having a mismatched tune and cam right now. Working through that still. Otherwise, it drove great. The only problem is the powersteering. It has a loud whine as soon as RPMs get much above idle. Either the pump is shot, or the supply fitting I used (1/4 NPT to 3/8" hose) was too small causing cavitation in the pump. Going to try fixing that with a 1/2" NPT to 5/8" Hose today.

I also ordered an M18x1.5 to 1/2" NPT to use the stock 944 Oil pressure sensor in my remote filter mount.

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Re: 1984 Gen IV 5.3 Swap

Post  Hotrodz of Dallas on Mon Oct 03, 2016 5:19 pm

I have had bad luck using the stock pump. I only use the Turn One pumps now.
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Re: 1984 Gen IV 5.3 Swap

Post  jpkinerk on Mon Oct 03, 2016 6:49 pm

+1 on the Turn One pump. I chased down all kinds of issues both in the steering and power assist brakes, once I added the Turn One pump (tuned for this swap specifically), all problems went away.
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Re: 1984 Gen IV 5.3 Swap

Post  dsrracer on Mon Oct 03, 2016 7:25 pm

superman22x wrote:I drove the car down the street for the first time yesterday.  Seems a little delay in throttle response.  But that is probably just due to having a mismatched tune and cam right now.  Working through that still.  Otherwise, it drove great.  The only problem is the powersteering.  It has a loud whine as soon as RPMs get much above idle.  Either the pump is shot, or the supply fitting I used (1/4 NPT to 3/8" hose) was too small causing cavitation in the pump.  Going to try fixing that with a 1/2" NPT to 5/8" Hose today.  

I also ordered an M18x1.5 to 1/2" NPT to use the stock 944 Oil pressure sensor in my remote filter mount.  

Where did you find one? I've just stared looking but haven't found one yey
thanks!
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Re: 1984 Gen IV 5.3 Swap

Post  superman22x on Fri Oct 14, 2016 8:41 am

I found it on eBay.  However, it turns out my oil filter mount uses 3/8" NPT, not 1/2" NPT.  Oops.  Have to see if there is a fitting for 3/8" now, otherwise I will just get a 3/8 to 1/2 elbow.

Also, the pump no longer makes noise now that I have the 1/2" NPT to 5/8" hose fitting on it. Found one of my lifters on the drivers side was collapsed this weekend though, so I've only been running on 7 this hole time. Stupid displacement on demand lifters. Got that straightened out though, should be able to fire it up on Monday, on all 8.

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Re: 1984 Gen IV 5.3 Swap

Post  superman22x on Wed Oct 26, 2016 8:36 pm

Car seems to run decent now. I haven't taken it off my street yet, hoping to do that this weekend. I've done some mild tuning so far. I have a wideband hooked up, and everything seems good that I've seen.
Working on getting gauges hooked up now. The tach signal from the E67 needs a 12v and 5k resistor to be able to be read by the Porsche Tach it seems. At least, this is what the GMPP manual suggests. Has anyone used a Gen IV controller and had to do this?
I also still need a fitting for the oil pressure sender as well, that is somewhere between here and China now.

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Re: 1984 Gen IV 5.3 Swap

Post  superman22x on Thu Oct 27, 2016 7:37 pm

No luck with the inline resistor on the Tach signal. Guess I'll have to dig further into this issue.

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Re: 1984 Gen IV 5.3 Swap

Post  matt889 on Sat Oct 29, 2016 10:38 am

superman22x wrote:No luck with the inline resistor on the Tach signal.  Guess I'll have to dig further into this issue.  
my truck PCM didnt have the pin 10 tachoutput did ur truck you took the engine from have a tach in it ? mine didnt and cant seem to find something to hook up the tach to im on pin 10 and the green wire under passenger side dash no luck

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Re: 1984 Gen IV 5.3 Swap

Post  sharkey on Sat Oct 29, 2016 12:49 pm

is the tach output turned on in the ecm? often its turned off as most of the time tach signal is sent through data bus

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Re: 1984 Gen IV 5.3 Swap

Post  superman22x on Sat Oct 29, 2016 2:28 pm

Yea, seems the ECM is set wrong.
I have a GMPP E67 controller, tach is pin 25 on connector 1 with this engine.

Took the car for a 20 Mike ride today. Unfortunately... The engine seized up. Guess I have the winter to continue working on it now.

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Re: 1984 Gen IV 5.3 Swap

Post  matt889 on Sat Oct 29, 2016 2:57 pm

superman22x wrote:Yea, seems the ECM is set wrong.
I have a GMPP E67 controller, tach is pin 25 on connector 1 with this engine.  

Took the car for a 20 Mike ride today.  Unfortunately... The engine seized up.  Guess I have the winter to continue working on it now.  
i have a full 4.8 silverado full block and heads( 243's ) if u need it 200 000KMS needs new rings

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Re: 1984 Gen IV 5.3 Swap

Post  superman22x on Sat Oct 29, 2016 3:02 pm

Not sure just yet. Here in Detroit there are plenty of blocks for sale at least. I'll probably yank it tomorrow and see what went pear shaped.

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Re: 1984 Gen IV 5.3 Swap

Post  racertomtom on Sat Oct 29, 2016 4:43 pm

superman22x wrote:
Took the car for a 20 Mike ride today.  Unfortunately... The engine seized up.  Guess I have the winter to continue working on it now.  
Dammit! Nobody needs that. So sorry to hear.

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Re: 1984 Gen IV 5.3 Swap

Post  erioshi on Sun Oct 30, 2016 12:14 am

Ouch! Hopefully you can get through this without too much trouble.
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Re: 1984 Gen IV 5.3 Swap

Post  superman22x on Wed Nov 02, 2016 6:58 am

Got the engine all torn down this week. No rod bearings spun, but all of them were in bad shape, showed signs of heat, and were scraped. Rear of the engine is worse than the front. All main bearings and cam bearings appear to be in good shape. I'm guessing I had low oil pressure the entire time. Just unsure why at this point. I didn't have my porsche gauge hooked up yet... Oops. I'm going to look at an LS2 from a TBSS tonight though. My aluminum 5.3 will be good for someone who wants to bore it out to 5.7 I suppose.

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Re: 1984 Gen IV 5.3 Swap

Post  superman22x on Thu Nov 17, 2016 6:52 am

Finally some updates. Car is in the garage for the winter now. So I started the sanding process. Previous owner did a good job getting all the panels straight, but didn't remove any trim or tach the car when the color coat went on it seems. Lots of fisheyes in the paint. My plan is to sand the whole thing with 80 grit, and in the spring, get a gallon of Evercoat Slicksand, spray and block the car, and bring it to a local paint shop for the color and clear coat (or maybe I will stick with single stage. Not sure just yet).

As far as the engine, I took apart the oil pump, and I'm thinking the pressure control valve got hung up in the low pressure setting. So I only had idle oil pressure the whole time. This is just a theory though.
I did stop by a junkyard yesterday and put down a deposit on an LS3 shortblock (they still had to remove the heads and such today). So that will be my new engine. Basically an LS3, but I am going to use my 243 heads and LS2 intake. With the LS3 engine, I know I will need a different flywheel/pressure plate. Do I need a different friction plate as well? I have the sachs unit that TPC sells with their kit.

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Re: 1984 Gen IV 5.3 Swap

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