| Author | Message | ||
| Paul Newman (Newman)
Member Username: Newman Post Number: 670 Registered: 12-2001 |
If 8-10k scares you, then dont port the heads either. Put on your NOS kit and be done with it. If you want to port the heads and change compression, simple, yank the whole drivetrain, split engine from trans, completely disassemble the engine and replace your pistons. Send your heads out for new guides prior to the costly porting(becasue 348's have crapy guides), order your custom pistons and replace all the other worn components you find while you are there. Easy and cheap. If you do all the labor yourself, you will be lucky to get it done for under 10k. Sounds like you should leave it alone. | ||
| Charles Barton (Airbarton)
New member Username: Airbarton Post Number: 45 Registered: 11-2002 |
I would love to have a 355 but the prices are still just too high. I actually have looked @ a few and found several that would be good choices. The only trouble is they are all outside my price range. Thats why I am looking for ways to improve the car I have. I thought the nitrous would be a good option because it is so inexpensive and generally not to complicated. I put it on an old T/A I had a few years ago and picked up about 200hp. It came in a kit I was able to install myself in about 4 hrs and only cost about $500. I just thought maybe someone might know if anyone out there makes something like that for a Ferrari. I know the main manufacturers like NOS make them for a variety of cars but I have not been able to find one for a 348. | ||
| Frank Parker (Parkerfe)
Intermediate Member Username: Parkerfe Post Number: 1536 Registered: 9-2001 |
For the amount such a swap would cost, you could either sell the 348 and buy a 355 or hop-up the 348 engine enought to be as powerful as a 355. | ||
| Mark Eberhardt (Me_k)
Junior Member Username: Me_k Post Number: 173 Registered: 5-2002 |
When you talk about 10 or 20 hp there are a lot of little things that might get you there. When you talk about 40 - 50% more, well that's a lot harder. You can build a race engine, ie porting,compression, cams exauhst, valve springs, Ti valves, Ti rods, new fuel ingnition systems. The cost...8-10k. Or you can go forced induction, blower/turbo, intercooler(or pistons ot drop compression), pulley(blower) or exhaust work (turbo), new fuel and ignition systerms. The cost 8-10k. If you can do the machining yourself you'll save 2-4k. If you want over 50%, then the only chioce is forced induction really. HP just isn't cheap. If your rebuilding the engine anyway, often you can sub in many ofthe race parts at no additional cost, but not cams or porting which acount for about 4-5k by themselves. Plus after you get finished modifying the car, where do you get it worked on? The more parts you change, the fewer shops will have the knowledge to repair it. I do my own work, so it doesn't matter to me, but if you don't it's very important. Often the answer to more hp is as Mitchell suggested at the beginning of the thread, have you thought about buying a 355? | ||
| Charles Barton (Airbarton)
New member Username: Airbarton Post Number: 42 Registered: 11-2002 |
wow 8-10K for a blower! I don't know if thats worth it to get the extra HP. I guess this whole idea is more complicated than I thought. I suppose porting and polishing the heads would be a good idea. I don't imagine anyone sells parts to acomplish the rest. Is anyone else interested in this idea? Don't you all agree the car would be better with a little extra HP! | ||
| Ernie Bonilla (Ernie)
Member Username: Ernie Post Number: 433 Registered: 11-2001 |
I know that you can get an extra 40-60hp from porting and polishing the heads. What about spinning the motor faster like in the 9,000-9,500 range. The valve springs would have to be changed to handle the extra rpm. Maybe even increase the compression ration from 10.6/1 to 11/1. Also what about increasing the displacement of the motor, by either stroking it or boring it out, or why not lets just get crazy and do all of the above? | ||
| Mark Eberhardt (Me_k)
Junior Member Username: Me_k Post Number: 169 Registered: 5-2002 |
The car can handle it. The compression is a little high so I think you would need to lower it or intercooler to get 100 hp. With lower compression 200-300 more is doable I think. To supercharge you'd have to build the parts or have them made I guess, I've never seen a kit. I'm think about getting into making them, but for a good kit plan on 8- 10K. I'm not a big fan of turbos on the street | ||
| Charles Barton (Airbarton)
New member Username: Airbarton Post Number: 37 Registered: 11-2002 |
Mark, were do I get a blower for the car? I would even consider a turbo if I knew were to get one. Can the engine handle either of those the way it is or will it need modifications such as lower compression pistons ect? This car would be really awsome with an extra 100hp don't you think? | ||
| Mark Eberhardt (Me_k)
Junior Member Username: Me_k Post Number: 168 Registered: 5-2002 |
I think you need a blower. Sorry one track mind  | ||
| Paul Newman (Newman)
Member Username: Newman Post Number: 662 Registered: 12-2001 |
Sounds like a cool setup with the twin turbos Gene but just imagine the money spent. Also what is it worth now that its a replica sort of? I would like to see some pictures though. | ||
| Charles Barton (Airbarton)
New member Username: Airbarton Post Number: 33 Registered: 11-2002 |
Mitchell, I sure would love to have a 355. Know anyone that wants to trade for a 348? Most of the 355's I've looked @ that are in good condition are selling for close to $90K. My wife thinks I already spent too much on the car I have. | ||
| Gene Agatep (Gagatep)
Junior Member Username: Gagatep Post Number: 86 Registered: 8-2002 |
Paul, Jim Carpenter of italianauto.com has done a twin turbo 348 on a 308 chassis converted to a 288 gto - longitudinal install | ||
| Charles Barton (Airbarton)
New member Username: Airbarton Post Number: 31 Registered: 11-2002 |
Ah well just thought I'd throw that out there. I suppose just buying a 355 would make more sense. The only trouble is a 355 in good condition is just a bit out of my price range so I thought I would try to find ways to improve my 348 instead. | ||
| Reiner Kaiser (Reinerkaiser)
New member Username: Reinerkaiser Post Number: 37 Registered: 2-2001 |
it sounds tempting, so let's say for the sake of the argument that you ruined your 348 engine and found a 355 powertrain, could you install it? I think that there are many things in the 355 that do not exist in the 348 , such as power steering, 6 speed or F1, etc., also your rear quarter panels would probably have to be updated as well (they are a bit wider, what else? | ||
| Paul Newman (Newman)
Member Username: Newman Post Number: 660 Registered: 12-2001 |
I was tossing around the idea that a 328 or 348 engine could be put into my 308, transverse mounted of course. Unless I can get an engine dirt cheap, it isnt worth it. I could jump to a TR for the money it would cost + the sale of my carb 308 if I paid going rate for the engine. So far it doent look like its going to happen. | ||
| BretM (Bretm)
Advanced Member Username: Bretm Post Number: 2949 Registered: 2-2001 |
For the money involved to either make a 348 run like a 355, or put a 355 engine in, you would be better off just getting a 355. Then you would have residual value as well as you wont get anything back on a modded 348 over a stock 348. A set of Ti rods comparable to what they use is gonna run you like $7G, forged pistons expect another $1000-1500, brakes you could get off a parts car for about $1500, engine management system is gonna run like $5G, etc. All in all you could make a 348 more powerful for less money than making the jump to a 355, but once again, you wont get any of that money back if you ever go to sell. Also, when you're done modding the 348 it wont be nearly as smooth as a 355, it's very hard to replicate the thousands of testing hours they put into the cars at the factory. So, although I think a 400hp 348 would be awesome, I personally like the 355 a lot and would try to jump for that before I would mod a 348 if I had one. Plus, 355 prices are coming down everyday. | ||
| Paul Newman (Newman)
Member Username: Newman Post Number: 657 Registered: 12-2001 |
I would think the cost of a 355 engine would make the swap not very cost effective. I would guess that it would be a $30k investment at least. Not to mention the modifications involved to make it work properly. | ||
| Mitchell Le (Yelcab1)
Member Username: Yelcab1 Post Number: 461 Registered: 11-2001 |
Charles have you thought about buying a 355? | ||
| Charles Barton (Airbarton)
New member Username: Airbarton Post Number: 29 Registered: 11-2002 |
I guess this is a follow up to the nitrous thing. I thought maybe this might be a good way to pick up the extra performance! I suppose I am just addicted to acceleration, something about pullin G's. I guess I don't get enough on the job! |