| Author | Message | ||
| Verell Boaen (Verell)
Member Username: Verell Post Number: 336 Registered: 5-2001 |
Paul, Peter's right on, If you're going to do serious engine mods, go for a V-12. Otherwise, a twin turbo like Ric Rainbolt's car, or the conversion Norwood does will probably give you the most go for your buck. BTW, the original Goldsmith car was up for sale in FML last fall. Anyone know how much it went for & what country it ended up in? | ||
| '75 308 GT4 (Peter)
Intermediate Member Username: Peter Post Number: 2010 Registered: 12-2000 |
Paul, don't go for only an extra 200cc's, shoot for the moon and try the Goldsmith V-12 conversion...  | ||
| Matt Morgan (Kermit)
Junior Member Username: Kermit Post Number: 52 Registered: 8-2001 |
Much better Idea IMO. We are now working to put together a package for large bore 308's. No reason it couldn't start as a 3200. This will require special sleeves, and boring the block to fit. As soon as I can I'll post more. It will be late this winter I suspect. I am still curious about "marrying" the 348 heads runners to a 3 or 3.2. It looks like a very involved mod though, with the idler issue, etc. Oh well, we would still be on horses if someone didn't try a new iodew now and then. | ||
| Paul Newman (Newman)
Member Username: Newman Post Number: 465 Registered: 12-2001 |
Well, that screws that idea. I wont bastardize it to mount it longitudinally. Oh well, maybe a 328 block is the wiser choice. | ||
| Matt Morgan (Kermit)
New member Username: Kermit Post Number: 50 Registered: 8-2001 |
In looking at a Mondial T manual, I can see that the pan that bolts to the bottom in place of the trans is a different shape. The right side widen out on the front passengers side. The belt drive cover is a different pattern too according to the picture. What might be a better way to go, although perhaps not as easy is to an adapt the 348 to the 308 as including the 348 trans. I wish I had more to pass on, but the majority of my work is on 308's. | ||
| Paul Newman (Newman)
Member Username: Newman Post Number: 457 Registered: 12-2001 |
If I bought the engine with the intake and injectors and so on, an aftermarket efi system like one from holley could be used Im sure. As well as a direct fire ignition incase there are no provisions for the distributor from my 308. I would like to retain the carbs though because I think HP would be higher and a stock appearance is somewhat important to me. I will dig deeper. I want to call a ferrari wrecker in town to see whats available. He seems to have alot of engines and gearboxes laying around out of write offs of most models. I think you are right about the torque. Uping the CID and going with 4 valves along with better cam timing and so on, I dont think I could go wrong. I guess cost will be the only limiting factor for me. If I could locate a higher mileage engine, I could freshen it myself to keep costs under control. | ||
| Matt Morgan (Kermit)
New member Username: Kermit Post Number: 49 Registered: 8-2001 |
I agree Paul, It sounds like an interesting way to up the torque and power. My question is : rather than carbs, why not look into adapting the stock injection? IMO the 348 has a superior runner, plenium design from a flow standpoint. If that proved to be too much trouble, the runnners could be shortened and a flange welded on to fit Webers. Anyone got any more info on the block? | ||
| Paul Newman (Newman)
Member Username: Newman Post Number: 440 Registered: 12-2001 |
Thanks, I suspect they probably didnt mess with the design too much for cost reasons. Ill look into it alittle more. | ||
| Matthew J. Morgan (Kermit)
New member Username: Kermit Post Number: 46 Registered: 8-2001 |
I do not know about the bottom end. The heads I have dropped right on a 308 block. Everthing looked like a go to me. I was more impressed with the runners and plenium on the 348 than 308 2V and 4V. The valve angle was changed slightly. The valve seats were as follows :intake seat ID .076 larger than 308QV. The exhaust seats were .066 larger, with the OD and valves correspondingly larger. The ID is what I look for as far as porting. It is one thing that limits flow. Too often larger valves are installed with the seat ID unchanged. This is much like putting a double door on the outside, while leaving the original single door jam. Only so much will go thru no matter how large of a valve | ||
| Paul Newman (Newman)
Member Username: Newman Post Number: 424 Registered: 12-2001 |
They did change the angle on the intake flange from carb to QV and I assumed the 348 was no exception. A simple sheetmetal manifold tig welded with nice aluminum wouldnt be that hard. Its probably the simplest manifold design on an engine. I figured the blocks would be similar in dimension, I just dont know what they put on the bottom of a 348 block for a pan when they relocated the gearbox. Anyone have underside pics or and engine on a stand? | ||
| jeff ryerson (Atheyg)
New member Username: Atheyg Post Number: 17 Registered: 8-2002 |
Talking to a local wrench the blocks are the same up to the latest cars they all have the transverse mounting holes, the top ends are whats different | ||
| Hans E. Hansen (4re_gt4)
Junior Member Username: 4re_gt4 Post Number: 146 Registered: 4-2002 |
I've heard that there isn't an off-the-shelf way to adapt carbs to any 4 valve head. I'd like to do that. Custom manifold, we're talking about. As for mounting and tranny compatibility, I've not a clue. Guessing a longitudinal block would be a major PITA to do transversely, but don't know for sure. | ||
| Paul Newman (Newman)
Member Username: Newman Post Number: 421 Registered: 12-2001 |
Just curious about the block mounting surfaces regarding bellhousing and oilpan/crankcases. Ive heard of 328 engines in 308s, why not use the stock 308 gearbox? Ive heard of complete unit transfers but not just the engines. I was also interested in how the 348 block differs? Could a 348 engine if stripped down to the longblock bolt to a 308 gearbox? Did they change the casting for the bellhousing and lower crankcase because of the Transverse gearbox layout? Yeh it probably isnt feasible but you never know, I like mess around with stuff like that. If I could get a 348 engine cheap enough from a wreck, I would consider it and make it carburetted. |