New pistons for my 308 ???

wiseco is where I had mine made, $1400 for pistons rings and pins in canadian funds when our dollar was crap including duty blah blah blah... venolia will make them too, just call around.

 

+1
I got mine from JE through Norwood's, same price.; bumped up compression to 10.5:1

 

Stock Borgo pistons are cast.

See what happens when they grenade?

(How many do you want,, free.)

JEs are Forged.

(It's a Ferrari motor.)
Edwardo
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The ferrari ring and piston technology was behind the times when the cars were new! 3 ring pack is the way to go, toss the 4 ring shop compressor pistons and get up to speed with todays stuff. Select your compression ratio bearing in mind you can run higher comp with aluminum heads due to heat rejection. Run a 10.5:1 piston right off the hop and crank up your timing. Add cams if you can spring for them and it will transform the car. My boxer has those same crappy cow turd pistons with 4 rings, they're getting the heave hoe when I tear into it. Also run a positive guide seal like newer cars so your oil consumption will be nil between changes since thats where 308's pull the oil from.

 

Never thought of them, when I think of pistons I think of piston makers that have been around forever and put my trust in them. If nick is having them made elsewhere then I dont see why I should pay the middle man. If he is making them himself then I wouldnt buy them for my own car because its a big leap of faith I would be taking on a very expensive job. I guess im stuck in my ways a bit with all the engines I do and its tough to change, its just personal preference and I know nothing about Nicks products.

 

Hey! Don't get so technical!

I just put 10.5:1 in my car and they are very nice! No problems so far with pump premium and 34 degrees advance. Anybody use more advance on a QV head?

 

And a "modest" bump in compression...
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3.2 qv stock 9.2:1 and a set of JE 10.5:1
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At best these domed pistons are a a far cry from ideal but were stuck with them. In the mustang engines I build we have the advantage of running a dished piston and still come out with a 10:1 ratio so the flame front doesnt have a hill to climb to get to the other side. Sorry but the engines are still ancient...at least my old 2 valvers, wonderful at making the right noises but old farts none the less. I wonder what the 360 is running for pistons and chambers, something like the QV? I figure they have a pent roof chamber rather than a hemi.

 

I have just installed a new heavy duty Kevlar clutch kit from FChat sponsor Norwood for a very reasonable amount; I really like it so far.
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Interesting pic of the broken piston - did the crank and rods suffer any damage?

 

if you are serious i would pay the shipping / boxing for one piston / rod assembly, just to have on my mantle!

Michael

 

you can have your disk and pressure plate rebuilt by any good local shop, and get new release and throwout bearings. the part numbers i think are in the cross ref thread. the 308 assembly was used in another donor car if i recall correctly, and it should not be expensive.

 

Couple other thoughts for 2 valve guys wanting to make power:

1. Change the compression height on the pistons so that the pistons at least come flush to the deck . . mine are coming out about .01 . .. I'll give you my numbers if you want.

2. One set of pistons I had made have massive valve reliefs in 'em really destroying the shape of the dome . . .in hind sight I think this has been a massive help by creating turbulence in the combustion chamber thus suppressing detonation.

3. Compression ratio . .. I'm at almost 12:1 (more like 11.8) with stock cams and am all the way to 36 deg full advance ... when I'm running really hard I'll add 5 gallons of (edit: Avgas) gas for extra protection but I can still run on straight premium . . . I think items 1 & 2 helped with this 'cause apparently others have experienced detonation at 10.5:1 increasing advance.

4. As several Fchatters witnessed last weekend, a 308 motor built like this with my EFI and minor suspension mod's is a bad ass car and will hold her own unless you get on a long straightaway . . . for those that don't believe this is possible I reccomend driving school .

Good luck . . these girls are tons of fun once you've got 'em setup .

Cheers,

Sean

 

To actually see some different 2v packages and how they do on the dyno, go to the "Dyno Results" section at www.carobu.com in the V-8 section. They have several different 2v engines with different levels of tweaking for comparison.

http://www.carobu.com/html/v-8.html

As always, the key is getting air into the motor.
best
rt

 

my motor has the stock 2vI induction system and cams . . . #4 in my last post still holds true . . . as you've said before Russ it's not just peak hp . . . torque is a big key and my motor has such a flat torque curve which is why it IS so fast but when you just look at peak hp it's not that impressive.

 

Yes, it's the whole package and what you intend to do with it. On street driven cars, torque is your best friend - and there's nothing like 12:1 that increases torque...
I would just add to Sean's good comments that especially with the 2v I engines, you need to do something to lose the K-Jetronic barn door in the induction system either with EFI or Webers. If not, then porting the heads and higher compression pistons will fatten the lower end, but your high end hp will always be shackled by the engine trying to breath around the K-jet airflow sensor plate (see: 'barn door')

 

What were those old 2V connecting rods made of? Cast Iron? or aluminum?

TIA

 

Great link to the Carobu site. Fitted JE pistons to my 308 GT4 are car which has worked well. Wrecken they've given an extra 25hp over the stock items . Would this be fair? Car runs higher profile cams and heads are ported and polished. Jetting as rich as I dare. I think the car is putting out about 280 hp at the flywheel but have yet to confirm this. Thought about putting bigger valves (inlet) in at the time of the rebuild but didn't . Regret that now. Anyone any idea what sort of hp the valves would have added ? Also I got a set of webber 44 DCNF's when I bought the car but have not fitted them yet. Would these give me many more horses over the 40's as I need to catch those 328's..............
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Russ--got a part # on those 328 pistons---I was about to get Wiseco to make a set...

 

give James a call at Norwoods - he's got the numbers. I'll look on my paperwork as well.