Which Forged Pistons - Please Vote

[DaveSupTT]

I have asked a few people and I am getting a right mixed view.

 

CP or Wiseco Pistons?

 

Im due to have my block rebored, and then ill be having oversized pistons put in. Its between Wiseco and CP. (I believe stock oem pistons are not available oversized)

 

So whats the main differences, the pros and cons etc. What will be best for me!

 

I am running BPU with Hybrids with no intention on going single etc.

I have tried searching as well, and I have read other comments I have found, but i am after some real reasons as to why some think one is better than the other.

Chris if you read this, I am going to call you (well I did actually but I missed you so ill try tomorrow now rather than bother you over tea! - edit, just got your voice mail, ill call tomorrow )

I also had a look on supraforums.com, and again, there are mixed thoughts between the two http://www.supraforums.com/forum/showthread.php?p=6165808

 

So guys, please comment with ANY info you have, and use the voting thing above!

Im saying its between these two as they are in my price range.

 

Cheapest I have found Wiseco is £372 inc piston rings, but excluding VAT and delivery (£14.99).

Cheapest I have found CP is £499 delivered inc rings. (May be subject to import tax on the CP's but not 100%)

 

To be honest, I would like to keep cost down, so if there isnt much difference at all, I will be going for the cheaper option!

 

Thanks once again!

 

 

Many regards,

 

Dave

Edited September 19, 2008 by DaveSupTT (see edit history)

[JamieP]

If you have to rebore id go with CP, otherwise for your setup and you saying you have no intention of going single then id stay with stock pistons.

[Marty]

If your engine is in need of a rebore, and you are only sticking to hybrids then i'd go and buy a nice low mileage second hand engine. Be much more cost effective i'd imagine. Forged pistons are overkill unless you are going single.

I've voted wiseco anyway as that is what i have in my car

Edited September 17, 2008 by Marty (see edit history)

[DaveSupTT]

If you have to rebore id go with CP, otherwise for your setup and you saying you have no intention of going single then id stay with stock pistons.

 

Why CP rather than Wiseco?

Whats the difference etc.

[paul mac]

i think a vote is a bit daft really mate cos all people are going to say is buy brand X cos they have them !, does that make them good ? and what are they basing their opinion on, i am sure this question has been asked of Chris Wilson and he said Wiseco, what more do you want, what you should have asked is could people with experience of building engines please vote, for what its worth i have CP and that was purely down to price and availability

[DaveSupTT]

i think a vote is a bit daft really mate cos all people are going to say is buy brand X cos they have them !, does that make them good ? and what are they basing their opinion on, i am sure this question has been asked of Chris Wilson and he said Wiseco, what more do you want, what you should have asked is could people with experience of building engines please vote, for what its worth i have CP and that was purely down to price and availability

 

I know Chris said he prefers Wiseco hes told me, and I am going to call him tomorrow to have a in depth chat about them over CP's. Reason why im thinking CP's after Chris has said Wisco is because when I contacted traders to quote on Wiseco, Paul Wiffin, Kylestt and Dusty have said pretty much the same, and thats they prefer CP and they are one the best on the market?

So conflicting opinions from the technical guys. So thats why I just wanted an overview. Like I said, im ringing Chris tomorrow to find out his technical reasons for him not rating CP as highly as Wiseco

[michael]

Like I said, im ringing Chris tomorrow to find out his technical reasons for him not rating CP as highly as Wiseco

 

High expansion alloy and generic ring packs that require hand filing if his previous posts are anything to go by.

[Homer]

I know Chris said he prefers Wiseco hes told me, and I am going to call him tomorrow to have a in depth chat about them over CP's. Reason why im thinking CP's after Chris has said Wisco is because when I contacted traders to quote on Wiseco, Paul Wiffin, Kylestt and Dusty have said pretty much the same, and thats they prefer CP and they are one the best on the market?

So conflicting opinions from the technical guys. So thats why I just wanted an overview. Like I said, im ringing Chris tomorrow to find out his technical reasons for him not rating CP as highly as Wiseco

 

Chris is an engineer and engine builder, the others?

 

As much as the other folks seem to be good traders (i.e. good at flogging stuff, good prices and hassle free delivery), they are not engine build specialists themselves.

 

Make your choice

 

Whoops, probably not meant to say that being a moderator and all. Oh well!

[DaveSupTT]

Cheers for your input Homer.

I understand and agree with what your saying.

I did however think that Dusty V8 Killer did engine builds? But then again I may be thinking of someone else - theres that many people on here.

Also cheers Michael for your input. Do you happen to know which thread he posted the comments in so I can have a read through?

 

Cheers

[paul mac]

Cheers for your input Homer.

I understand and agree with what your saying.

I did however think that Dusty V8 Killer did engine builds? But then again I may be thinking of someone else - theres that many people on here.

Also cheers Michael for your input. Do you happen to know which thread he posted the comments in so I can have a read through?

 

Cheers

 

i think whichever piston you go for if you follow the manufacturers instructions you will be fine, lots of people run Wiseco and CP with no problems

[SimonB]

I did however think that Dusty V8 Killer did engine builds? But then again I may be thinking of someone else - theres that many people on here.

 

He doesn't build engines himself, he has an engine builder he uses to build engines for customers. There's basically three types of people involved in engine builds I guess. First are the "resellers" like MVP, PHR, traders here who will get your engine built for you by someone else. Then there are the Chris Wilsons who build engines but don't have the machinery so use a machine shop to do the actual boring, head porting, valve seat cutting etc. And then there are machine shops that do the physical stuff. Most of these guys don't actually build engines.

[Matt H]

Well Michel is sticking Wiseco in mine if that helps

[Pixelfill]

Well Michel is sticking Wiseco in mine if that helps

 

In that case go for CP j/k

[DaveSupTT]

In that case go for CP j/k

[Paul Whiffin]

Chris is an engineer and engine builder, the others?

 

As much as the other folks seem to be good traders (i.e. good at flogging stuff, good prices and hassle free delivery), they are not engine build specialists themselves.

 

Make your choice

 

Whoops, probably not meant to say that being a moderator and all. Oh well!

 

So I dont build engines? I have no experience with Wiseco pistons so cant comment on those. CP are recognised as being one of the best around at a good price, why use anything else?

[DaveSupTT]

Well after just getting off the phone to Chris and discussing this topic, I have decided to go for Wiseco after listening to his reasons against CP. Also at the price I have found them for, they are a bargain

[mikeyb10supra]

I wouldn't have a problem using the weisco ones, but if I had the money, Tomei would be on my shopping list

[johnny g]

Wiesco for me - but if if money wasn't an issue ... JUN/Cosworth ones.

[Luka-P]

Ill be purchasing Wiesco if a rebore is needed...

[supra]

Also at the price I have found them for, they are a bargain

 

wiseco are cheaper rrp than the cp rrp, one thing i have noticed on this forum is people tend to go with whats "cheaper" over quailty.

 

both cp and wiseco come out of the usa.

 

is there any "specific" reason why chris wilson prefers the wiseco over the cp pistons?

 

maybe he can input on this thread his opinions?

 

also what he thinks to wosner pistons made in germany? and i also like input on wosner rods over carrillo rods?

 

[DaveSupTT]

wiseco are cheaper rrp than the cp rrp, one thing i have noticed on this forum is people tend to go with whats "cheaper" over quailty.

 

both cp and wiseco come out of the usa.

 

is there any "specific" reason why chris wilson prefers the wiseco over the cp pistons?

 

maybe he can input on this thread his opinions?

 

also what he thinks to wosner pistons made in germany? and i also like input on wosner rods over carrillo rods?

 

 

 

From what Chris was saying to me is that CP were cheap and nasty and the pistons were made of a cheap alloy.

He said that they have got to be run at a huge bore clearance and that the rings were made of a generic size and all the rings have to be hand gaped which means they dont fit any particular bore size properly. He did give me other details on how pistons should be properly fitted but that's about as much as I can recall im afraid.

He said Wiseco were a good cheap piston and hes used them a few times and had no problems.

Hopefully what I wrote above is more or less correct.

If you read this Chris and I am wrong feel free to correct me.

 

Thanks

 

Dave

[supra]

From what Chris was saying to me is that CP were cheap and nasty and the pistons were made of a cheap alloy.

He said that they have got to be run at a huge bore clearance and that the rings were made of a generic size and all the rings have to be hand gaped which means they dont fit any particular bore size properly. He did give me other details on how pistons should be properly fitted but that's about as much as I can recall im afraid.

He said Wiseco were a good cheap piston and hes used them a few times and had no problems.

Hopefully what I wrote above is more or less correct.

If you read this Chris and I am wrong feel free to correct me.

 

Thanks

 

Dave

 

unfortunately that comment by chris wilson is uncalled for imo.

 

there is NO proof to his comment.

 

there are hundreds of supras (and other high HP cars out there) using the cp pistons and ring set with excellent track record.

 

there are many supra owners using the cp pistons running serious power levels, good reliable and very consistant records using the cp pistons.

 

not saying wiseco are rubbish in any way.

 

if there are any factual details i would b very interested to see them and broaden my knowledge.

 

[kslb]

I am using JE forged pistons and very happy with them. Just another one to look at.

[Chris Wilson]

Poor alloy choice with big expansion rate, hence need to run at large bore clearances, which impacts ring stability. Delivered with generic ring packs that need hand finishing to size. Proper ring packs are cast and ground to a specific bore size, and therefore stay round and at the correct tension when fitted, and shouldn't need the ends hand gapping, which is a tricky job even for those used to doing it, unless you buy a ring grinder and know how to use it. To me that's cheap and nasty. It was also a comment I made privately, when asked for my opinion on the phone. I stand by it though

[Pixelfill]

Poor alloy choice with big expansion rate, hence need to run at large bore clearances, which impacts ring stability. Delivered with generic ring packs that need hand finishing to size. Proper ring packs are cast and ground to a specific bore size, and therefore stay round and at the correct tension when fitted, and shouldn't need the ends hand gapping, which is a tricky job even for those used to doing it, unless you buy a ring grinder and know how to use it. To me that's cheap and nasty. It was also a comment I made privately, when asked for my opinion on the phone. I stand by it though

 

I can edit it away if you wish Chris .

 

Mike