 
     |
| Chrysler 3.5 HO V6 swap (Page 22/33) |
|
BV MotorSports
|
JUN 09, 10:37 PM
|
|
| quote | Originally posted by seajai:
Update: It's been a week now since I got her back on the road. The 3.5HO engine revs to 6500 rpm and has a manifold tuning valve and a short runner valve that changes the airflow through the intake above 5000 rpm. The result is this engine just pulls hard and smooth all the way from idle to redline, making it a helluva lot of fun to drive. Filled the tank today, 7.3 gallons for 139 miles driven, so just under 20 mpg. Pretty good considering there has been more than a handful of full throttle runs, and plenty of idling while I worked out a few bugs. TorquePro indicates instant fuel economy around 25 while cruising on the highway. The engine is turning about 2100 rpm at 65 mph so I anticipate decent highway mileage if I can keep my foot out of it.
Been dealing with a cooling system issue, the SAAB coolant tank has a 20lb cap and the cap on the radiator was only 15lbs. When the front cap would try and vent, it would leak out around the cap because I had plugged the overflow port. I ended up plugging the radiator opening with a Dorman rubber expansion plug which so far has cured my leak problem. I can't find a 15lb threaded cap to fit the SAAB tank so I may go back to the pick n pull to look for a different coolant tank that uses a standard cap. I'm not sure what the long term effects would be of running a system at a higher pressure than stock.
Got my exhaust done by Tim's Custom Exhaust in Anoka. They did a great job of fitting it all in, it's amazing how little room there is. The twin MagnaFlow mufflers sound sweet with a nice mellow tone when driving normally and a good bark when the loud pedal hits the carpet. Stay tuned for an updated video...
|
|
Some may not like it, but I love the way fabricated (cut & weld vs U & J bends) exhaust looks.
|
|
|
|
seajai
|
JUN 13, 06:51 PM
|
|
|
Engine wouldn't start today after a quick 10 min stop at the auto parts store. First time that has happened, pretty warm today, think it may be a heat soak issue. Started again after leaving the trunk lid open for 10 minutes. Thinking I may need to add a couple decklid vents to let the heat out. Any suggestions?
|
|
|
|
Jake_Dragon
|
JUN 13, 07:35 PM
|
|
|
|
|
seajai
|
JUN 13, 07:58 PM
|
|
|
My car will run down the road all day at 195-198 deg and never higher than 213 when idling in traffic. I think I need something to let the heat rise out of the engine compartment when parked. A scoop would be cool, seen a couple pics of 84 center decklid vent being retrofit too.
|
|
|
|
Jake_Dragon
|
JUN 14, 09:05 AM
|
|
| quote | Originally posted by seajai:
My car will run down the road all day at 195-198 deg and never higher than 213 when idling in traffic. I think I need something to let the heat rise out of the engine compartment when parked. A scoop would be cool, seen a couple pics of 84 center decklid vent being retrofit too. |
|
Just make sure that you can get air flow in as well as out.
There was a reproduction in fiberglass but I don't recall who sold it.
|
|
|
|
Jake_Dragon
|
JUN 15, 09:25 PM
|
|
|
|
|
seajai
|
JUN 16, 02:01 AM
|
|
Yeah, I was eying up that one too. Although I really like the custom vent that SkiTime did on his car too. Decisions, decisions........
Edit: WooHoo!, my thread made it into the construction zone.  [This message has been edited by seajai (edited 06-16-2013).]
|
|
|
carbon
|
JUN 16, 11:04 AM
|
|
|
|
|
seajai
|
JUN 18, 01:40 AM
|
|
Car had a seizure on the freeway today and left me stranded against the concrete center divider. The engine just shut off and the PRNDL and odometer displays went dark, the speedo went to 120, the odometer display came back on with a "no bus" message for a few seconds, and then went back to normal. When I tried to restart, the starter would stutter like the relay was shutting off and the PRNDL and odometer displays would blink in unison. Opened the trunk lid and let things cool for about 10 minutes or so, hoping not to get rear-ended as I sat there. After a few failed attempts, the engine started and ran fine the rest of the trip. I know there are a few 300M owners out there in Fiero land, anybody ever experience something similar? It's pretty tough to find any useable diagnostic info about this engine on the web. Best I could tell, it may be a failing crank sensor.
I've got about 350 miles on it so far, and It's been a fun car to drive, but there are a few bugs popping up I need to deal with.
The stalling / no start issue.
I think I have a wheel bearing going bad.
The radiator has had trouble keeping up at 70mph on the freeway the last couple warm days, it runs 197-199 when the temps are cool but Sunday when it was 85 and sunny it was 208-212. So I think I may get a Champion 3-row aluminum Radiator to remedy that.
My engine has developed an incontinence problem and will randomly leave a small coolant spot on the garage floor, it's never more than a tablespoonful. I think my new waterpump from O'reillys is the culprit. (That one irks me because I wasn't particularly sanguine about using the MasterPro brand went for it anyway). Since I'd hafta pull the engine out to replace it, I'm gonna let it go for now because it only dribbles after the engine has cooled down.
|
|
|
|
kennn
|
JUN 18, 10:13 AM
|
|
You may have already explored this, but I wonder if there could be a grounding issue.
Ken------------------
'88 Formula V6
'88 GT TPI V8
|
|
|
|
