| Author |
Message |
Paul Newman (Newman)
Intermediate Member
Username: Newman
Post Number: 1079
Registered: 12-2001
| | Posted on Friday, January 24, 2003 - 6:21 pm: | |
I had mine made by Wiesco in ohio. They have made 2 valve and qv pistons. BretM bought a set for his qv from there as well. I believe mine cost $1700cdn including rings, pins, tax and so on. I had mine made to 10.8:1 and have only good things to say about them. |
Ben Millermon (Brainsboy)
Junior Member
Username: Brainsboy
Post Number: 119
Registered: 5-2001
| | Posted on Thursday, January 23, 2003 - 3:35 pm: | |
They are forged and made by Venolia . I'm sure they have made them before as they have about 5 models. V12's were around 930$ the dino was 481$ and the 308 621$ for complete sets. |
Philip Airey (Pma1010)
Junior Member
Username: Pma1010
Post Number: 95
Registered: 7-2002
| | Posted on Thursday, January 23, 2003 - 1:47 pm: | |
Ric
What do JE charge for forgings and were you able to buy less than 12?
Thanks
Philip |
Ric Rainbolt (Ricrain)
Member
Username: Ricrain
Post Number: 429
Registered: 2-2002
| | Posted on Thursday, January 23, 2003 - 1:40 pm: | |
Are the cast or forged? I'm told the pin offset is slightly strange on Ferrari pistons. Does this company have any experience or prior construction of pistons for this application?
FWIW, I have used JE for forged pistons (10.4:1 CR and another set at 8.8:1 CR). They are exceptionally well made. |
Ben Millermon (Brainsboy)
Junior Member
Username: Brainsboy
Post Number: 118
Registered: 5-2001
| | Posted on Thursday, January 23, 2003 - 11:42 am: | |
Thanks for all the information from everyone. I will probably just try an aftermarket piston. I have found a company that makes a 308 piston. They want 621$ a set, and can make it from 7:1 to 12:1. Is this a good price? |
Greg Rodgers (Joechristmas)
Member
Username: Joechristmas
Post Number: 618
Registered: 3-2001
| | Posted on Thursday, January 23, 2003 - 6:23 am: | |
I was thinking about that too Paul. That is a good idea but are the motor mounts bolted to the engine?
|
Paul Newman (Newman)
Intermediate Member
Username: Newman
Post Number: 1076
Registered: 12-2001
| | Posted on Wednesday, January 22, 2003 - 7:28 pm: | |
I have also heard the mounts dont line up but they have been put in before. Last one I heard about, they used the whole engine/gearbox assy but what if you transfered the engine to the 308 gearbox? |
Greg Rodgers (Joechristmas)
Member
Username: Joechristmas
Post Number: 616
Registered: 3-2001
| | Posted on Wednesday, January 22, 2003 - 4:51 pm: | |
The 328 engine won't fit into a 308 though right. The mounts don't line up if I remember correctly. Is this right? |
Paul Newman (Newman)
Intermediate Member
Username: Newman
Post Number: 1075
Registered: 12-2001
| | Posted on Wednesday, January 22, 2003 - 2:39 pm: | |
I have heard of people using 328 cranks in 308 blocks to increase displacement but dont know the work involved. May drop right in but a special piston would be required. It would be a worth while modification IMO. |
Matthew F (Mateotnt)
New member
Username: Mateotnt
Post Number: 15
Registered: 7-2002
| | Posted on Wednesday, January 22, 2003 - 11:06 am: | |
But can you use a 328 crank to restore proper stroke? |
Matt Morgan (Kermit)
Junior Member
Username: Kermit
Post Number: 102
Registered: 8-2001
| | Posted on Wednesday, January 22, 2003 - 9:41 am: | |
Ben, I'm in the process of building 83mm bore 308's for Nick's Forza.. The stock 308 liner will bore to 83 max. This leaves .158", which is just above Darton Sleeves recommendations of minimum .150" wall thickness. The block is bored a bit larger for the sleeves on a 328, so the cost of reboring woulnd't be worth it. Rics right, too much hassle. As the stroke is longer on a 328, the result of useing those pistons would be a drop in compression, due to the piston height. |
Ric Rainbolt (Ricrain)
Member
Username: Ricrain
Post Number: 416
Registered: 2-2002
| | Posted on Tuesday, January 21, 2003 - 6:50 pm: | |
No, but even if they did, you'd only end up with a 3.073 Litre motor (a 5% increase)... hardly worth the effort and $5-10K you'd spend in the process.
The Nikasil liners can be overbored, but it's an expensive process (they have to be machined down and then retreated with Nikasil). In the end, you'd end up spending $200-$300 per liner to do it.
If you want a 328 motor, I may know where a good factory crate motor (long block with all accessories, but no ECUs) can be had for substantially less than list.
If you have a 308 motor that's already apart, then consider aftermarket higher compression pistons. They're way stronger and much cheaper than OEM 328 or 308 pistons.
YMMV
|
Mitch Alsup (Mitch_alsup)
Member
Username: Mitch_alsup
Post Number: 306
Registered: 4-2002
| | Posted on Tuesday, January 21, 2003 - 4:51 pm: | |
No:
308 QV 81 mm piston in a 71.0 mm Stroke
328 QV 83 mm piston in a 73.x mm stroke
So even if the ring sizes and spacings are the same, and the cumbustion chamber had a usefully similar shape, and the piston pin position was the same, you are still out of luck. |
Dave328GTB (Hardtop)
Member
Username: Hardtop
Post Number: 397
Registered: 1-2002
| | Posted on Tuesday, January 21, 2003 - 3:53 pm: | |
It is my understanding you cannot overbore QV bores and there is no way the dome of a 328 piston is designed for 4 valves so could no way work with 2 valve heads even if you could overbore enough. No way head gaskets would work. Besides the bore diameter, the water openings would not match.
Dave |
Ben Millermon (Brainsboy)
Junior Member
Username: Brainsboy
Post Number: 117
Registered: 5-2001
| | Posted on Tuesday, January 21, 2003 - 3:35 pm: | |
Does anyone know if 328 pistons will fit in a 308? Also Will 328 head gaskets work on a 308? I notice the 328 has a larger bore, can the 308 be bored enough to fit 328 std pistons? |