I've been chatted to various specialists and am considering doing a few things. Not all but maybe one or two this year and others later. What do you guys think? Good or bad, please post up as I value your input. First up... tubi 348 manifolds. I've been told a figure of 20bhp??? Anyone had these put on their 348? Next, 355 gearbox swap. Assuming it does'nt affect the air con etc, I'll probably do this end of the year. A 355 gearbox has been located. Any downsides to putting a 355 gearbox in regards to drivability etc? Third... the engine will be out having the gearbox put in... sooooooo how about some titanium con rods? Good idea or bad idea? Fourth.... is to have the 355 plenums grafted on. Downside is the need to change the rear engine cover. Fifth... someone has offered to put a 360 engine in the 348. I'm tempted.....very tempted...but not certifiably mad as yet. but what if.............??? I'm currently running at around 342 bhp (assuming 18% transmission loss). My target is 390 to 400bhp or just under. So around 50bhp should do it. I should also putting in a racelogic traction contraol system as well in the next month or so. Going to choose oine with launch control. Will never use taht function...but it's so cool i can't resist it. Trying to get hold of the traction control switch from a 430 to use instead of teh standard button. Why all the mods? No real reason, I just want to build something unique and perfect for me and I'm never going to sell it it, upgrade it etc. And no...i don't want a 355 or 360........because this looks loads better By the way... do you lik my new plate? Tried to get 666 but someone alreday had it. Image Unavailable, Please Login Image Unavailable, Please Login
I see another monster 348 in the works..... the other is of course andy hill's..... You should just do the 355 motor...... a 360 motor will not work unless you use a 360 gearbox. The end of the 360 crank is different and cannot accomodate the 348/355 trans/shaft. Iknow because I looked into using a 360 crank on mine..... great plate by the way......
I did think about the 355 engine, but according to people I've talked to, most don't have the 375bhp often quoted. Plus they are quite expensive as they always catch fire (sorry...couldn't resist ). To fit a 360 engine i would need everything. gearbox, ecu's etc so the cost would be quite high and would require the moving of the fuel tank. It's insane, but doable. After all, someone fitted a V12 into a 355. Did you get the Brembo brake kit Oz? I've been waiting 13 weeks for the AP Racing brakes, only to be told last week that they have misplaced the calipers that went for painting and I would have to wait another 4 weeks for them!!!
Great looking car and plate. I figure your parasitic drag loss to be more like 20+%. We just have too much stuff in there to twist and turn before the power gets to the wheels. Of course, all dynos are differrent so the numbers you see are relative and not absolute. I am envious of your situation - you can do whatever you want to your cars and not worry about the CA smog Nazis!
Stock is 320bhp..... and I have tubi, hyperflows and K & N filter. Although I have a strong suspicion that a previous owner has messed with the ECU's as the rev limit seems to be at 8,200 rather than the standard 7,500. May explain the low mpg i get..although maybe the excess revving has something to do with it. It was discussed here along with teh dyno graph. http://www.ferrarichat.com/forum/showthread.php?t=195382&highlight=dyno
352 bhp on a 348 I paid £1.29 ($2.59) for a litre of fuel today. We may not have the Nazi smog rules here yet, but they still **** us every other which way!!!!
That is where our engines have potential. The 355 revs so much higher and generates most of its higer HP in these woods. I have been hesitant to spin my engine up this high, so I am curious of how it works out for yours. The stock cutoff for my car is 7750 revs (or so). Another couple of hundred might not be so bad... What do you think, goth and ND? Can we get there? BTW, those stripes do a lot for the look of the car. It almost looks like you need some ducts on the hood.
We did a compression test before the engine out and each cylinder was 195 with a couple at 185. So no damage to the engine as far as i could see. Remember also that Chaa chipped his testarossa to 10,000rpm and it's still going strong. I had a chat with a Ferrari technician who knows these cars quite well and told him about the bhp figures. He said we could take it down to a place that would download the ECU info and we could have a look. I could get a copy done and send it over to you guys if that helps. I'm definetly keeping them. Most people who aren't too sure about them change their minds when teh see the car in the metal. photo's don't do it justice. As for the hood, I should have the 355 bonnet grill put on next week and the stripe applied over it. Ducts sound like a nice idea but I think it's a bit over the top...even for me.
The 1994 Le Mans 348s ran 9000 rpms for 24 hours straight (2nd fastest in class), so I'd say that we should look at 9000 rpms (or a bit less) as the maximum for our own revs.
.............. that is why one must stay on top of it maintenance wise ........ I do regular instpections on my 355 to try ans head off any potential 'issues' ............... I just don't drive it and wait until something goes wrong then blame the car ....... Yes this is true and you are on to one of my 'down the road' projects........ getting a 355 or 360 (haven't decided yet) drivetrain from a damaged vehicle and doing a 'total rebody/suspension' to aircraft/racecar specifications........... My 'connection' fell through... ...... there is no way I am paying retail for that setup....... I may just go with the front slotted girodiscs.... ... I don't see a problem going to 8000 rpm with an 8100 cutoff ........... though to really take advantage of higher RPMS...... one would have to retard the intake cam and advance the exhaust cam to move the torque peak to the new higher RPM . Exactly how much, would need some calculations though..... . +1
This is what I had in mind with my comment. On our dyno runs, you can see the torque drop off as the engine nudges into the mid-7K range, so adding revs is going to continue the HP curve upward (after making F/A adjustments) while torque drops. I don't want to muck around too much with the torque curve since it is fine right where it is. Moving it up might not make the car as street drivable as it is. The LM 348's didn't have this problem, IMO.
A knowledgeable local 348 owner has told me that a well-respected local Ferrari Indie mechanic is confident our 348's would hold to 10,000rpm (no kidding). I don't plan to test fate, though!
Vince.. ................ the HP curve cannot continue 'upwards' as RPMs climb unless the 'torque' at higher RPMs holds steady or goes up. A/F ratio/mixture can help a tad but it really boils down to the engine processing more air along with the correct fuel. Higher RPMs will do that but the cams need to be optimally timed for that higher RPM. As the cam timing is now and just spinning the motor faster along with more fuel will not yield apreciable HP gains and may even lose some HP. .............
What???? You're thinking of modifying a Ferrari????? Heresy, I say!!!!!! Just kidding. Sounds like you're going to have some fun! Looking forward to seeing the results! Love the stripes!
+1. This would yield some crazy horsepower and probably cost less than one might think. Sound Performance in Chicago is huge into the Supra Turbo's (1600 RWHP 3.4 litre's) but can design a turbo set-up for most anything. I think safe to say that you would be in the 500 to 600 HP range with low boost.
I also have a 355 Gearbox which I'm trying to get fitted to the 348 at the moment. Trouble is finding someone willing to take it on, without me needing to get a 2nd mortgage! (I have neither the room or the expertise to do it myself). As soon as people hear 'Ferrari' they automatically assume they can add a '0' to the price.
You're right about that Your 348 looks great and good luck with the mods! Be sure to post more pics once they're done.
And the CAMs are now in my car Not sure what my rev limiter is set too. Deffo not 9000rpm but over 8000rpm.
