| Author | Message | ||
| Mark Eberhardt (Me_k)
Member Username: Me_k Post Number: 650 Registered: 5-2002 |
Running off the cam seems like a very bad idea. It is pretty easy to throw another pulley on the crank though. For the blower pulley, I machine the outer edge to 3.600" and put 3 small dowel pins around the center then use a longer center bolt to hold everything on. I'm sure a drysump pump could be done the same way.    | ||
| Newman (Newman)
Intermediate Member Username: Newman Post Number: 1252 Registered: 12-2001 |
I did try the overfill option and I dont get the same dip in pressure on the same on ramp as before. Thanks for the input. I did see a 308 with an aftermarket drysump setup, tank in the trunk and the pump ran off the cam pulley (toothed of course) originally used for the airpump. I didnt like that setup loading the cam belt like that, could cause a major disaster. | ||
| Philip Airey (Pma1010)
Member Username: Pma1010 Post Number: 366 Registered: 7-2002 |
There's a number of threads in the archives about this. Some of you may know Bill Pound -- he's forgotten more about the 3x8 series of motors than I'll ever know. He tried deeper pans (e.g., 328 pan on a 308) and Accusumps. None of this worked very well. The oil pump flow rate is so high in Ferraris that even a bigger Accusump will get exhausted in a fraction of the time it takes to complete a turn like the carousel at RA. Not too much of a problem usually in the carb cars as they experience fuel starvation too, but a bigger problem in the FI cars. As I recall, Ferrari did introduce a modified windage tray to help combat the problem. Solution was a DS conversion. Bill Pound built up a kit - from memory about 3K - to convert from WS to DS but you lose the AC compressor in the process. I passed (too expensive and while I don't use the AC much in Chicago, I do want it there). On my WS 77, I do overfill the sump at the track, and, thanks Phil, I'd never known how much to overfill before it starts squirting everywhere (tends to get past the cam seals as the top end gets pressurized). | ||
| Ira Schwartz (Iraschwartz)
New member Username: Iraschwartz Post Number: 16 Registered: 5-2003 |
I have a 3-quart Accusump in my GT4 track car, but rather than try to squeeze it into the engine compartment it's in the trunk. I was having real oil surge problems, and while this set-up seems to have mitigated them to some extent, there's still a bit of a drop in oil pressure in right-hand sweepers at the tracks where I hang out, viz Moroso, Sebring, Homestead. I've also had to add an extra oil cooler to keep the temp under control, so there's a lot of extra plumbing to contend with. | ||
| Phil Hughes (Ferrarifixer)
New member Username: Ferrarifixer Post Number: 45 Registered: 7-2003 |
Accusumps do work, but the Ferrari engine bay doesn't lend itself to many add on's. The wet sump arrangement needs a little encouragement to perform, but it can be ok. The oil level must be overfilled by 25mm WHEN HOT (100 c). This is about 5mm over max when cold. BE SURE YOUR CRANK VENT CONDENSOR POT has a clear drain to the sump. They get internal corrosion and need cutting open to fix and then re weld closed. If you over fill the system with a blocked return pipe, or go more than 25mm over max, you will compress the crankcase and the inlet system will swallow itself with dramatic effect. You can re-route the vent pipe away from the filter box inlet and into a separate catch tank if you want to get serious. | ||
| Joe Craven (Rscapri2600)
New member Username: Rscapri2600 Post Number: 26 Registered: 7-2002 |
Has anyone explored adding an Accusump to these motors? BTW, I race a couple of cars and when I've seen the oil pressure start wiggling due to oil pickup problems, the motor already has bearing damage. Of course, they still run but when I tear them down, the main and rod bearings definitely get some wear. If I've kept the motor oil pressure constant, bearings stay closer to looking like new. 85 Mondial QV | ||
| '75 308 GT4 (Peter)
Advanced Member Username: Peter Post Number: 3002 Registered: 12-2000 |
Dave, not only does the 308 have a windage tray stock, but it has a second horizontal tray as well (which is bolted to the pan itself and is one of the leading causes for difficult pan removal, second to the dip-stick tube being in the way). Plus, trap-doors and boxed-in pick-up tube. The 308 wet-sump layout is as close to a racing set-up that you can get, without resorting to dry-sump and should be more than suitable for road use (you must be pushing it Paul, because I've never experienced this problem). One of the easiest and cheapest remedies is to install a 328 oil-pan and pick-up tube. The 328 pan is only about 1/2" deeper than the 308 one, but I'm told it makes a considerable difference. | ||
| Mark Eberhardt (Me_k)
Member Username: Me_k Post Number: 645 Registered: 5-2002 |
An aftermarket drysump oil pump if about$600, then plumbing, a tank, brackets, ...I'd figure $1500 to do it. I think Jeff Davison is doing a QV and posted something, if you do a search it might turn up. I'm trying to get it on my list for next year but I still haven't finished last witer's winter upgrages yet..... | ||
| Russ Turner (Snj5)
Member Username: Snj5 Post Number: 371 Registered: 2-2003 |
You're right - it's unavailable. Will try later. Did you or any of the Seattle folks ever make it up to NFF or Kermit's? Would be interesting to meet these guys. | ||
| dave handa (Davehanda)
Intermediate Member Username: Davehanda Post Number: 1589 Registered: 5-2001 |
www.durable1.com he said he was having some website troubles due to the worm...so patience if you cannot get it to load. (at least that's what I saw him post on the KrankVent thread...) | ||
| Russ Turner (Snj5)
Member Username: Snj5 Post Number: 370 Registered: 2-2003 |
What is the address for Kermit's site? thanks rt | ||
| dave handa (Davehanda)
Intermediate Member Username: Davehanda Post Number: 1587 Registered: 5-2001 |
You can buy a "windage tray" that fits inside the oil pan, from aftermarket suppliers...I believe I saw one on Kermit's site. They may be others that offer them as well. | ||
| Newman (Newman)
Intermediate Member Username: Newman Post Number: 1246 Registered: 12-2001 |
I know the blocks are cast to be either wet or dry but never looked into how feasable it would be to change it over also the parts cost for factory stuff would be silly Im sure. I dont really want to go aftermarket either. | ||
| Lee Hamner (Tennlee)
Junior Member Username: Tennlee Post Number: 160 Registered: 2-2002 |
That is the common complaint against wet 308s. I think there are conversions to drysump still available. | ||
| Newman (Newman)
Intermediate Member Username: Newman Post Number: 1245 Registered: 12-2001 |
During long right handers at high speeds, the oil pressure goes to 0 and the pressure light comes on. Not good so I guess I have to slow down or get an early Euro 308 drysump car. Why would they make the car handle well enough to cause oil starvation problems? |