88CRXHybrid

Does anyone actually have any dyno's that prove that the rollerwaves at the same compression ratio make more power than oh say JE, Arias, or stock?

falcongsr

there may be something to 'sanding' the tops of pistons to remove sharp edges, which removes hot spots, but theres no substantial evidence to support the 'rollerwave' theory - except for that which comes out of Larry's mouth. unfortunately much of what comes out of his mouth is suspect.

i say unfortunate cause they guy is one strange bird even though he has a great amount of knowledge regarding engines.

case in point, Larry has told people he likes to troll other boards reading what other people say about him....it looks like he's been spotted on clubsi
http://forums.clubsi.com/ubb/Forum16/HTML/007062.html

dustin

Hmm, I thought larry worked for the CIA.
sorry. =P

Continue the technical discussion.

pornstarSR

well see i have purchased some endyne roller wave pistons, but they are just sanded down weiscos....soo im hoping this giant larry scandal doenst filter down to me becuse the motor is still being built(not by larry) and i dont want many more problems

b18bturbo

I think they are great pistons actually. Most people have had only good thoughts about them when they put them in there motor. Even if larry only sands them down. They are still good pistons no matter what anyone has to say. I asked the saem question last week.

SiR Kid

I like mine.. mine are ceramic coated too.




[Modified by SiR Kid, 2:20 PM 2/20/2002]

pornstarSR

ok atleast im hearing good things...yeah mine are done with there thermal coatings

turboex

i have wiseco 7.5to1 pistons and i love them. so at least larry started with a good product.

pornstarSR

mine are 9.0-1 were trying something different

93LSivic

Damn that some low compression. Whats the point?

pornstarSR

yeah that is realllly low....

turboex

well i dont have access to a dyno, so im gonna play it super safe. the weird part is that the car drives just fine. i guess we will see how it runs after the turbo is on.

Dublocivic

Ive talked with Larry at and Englishtown event and he is a very intelligent guy.. I dont know what happened
between a few members etc.. I had an article published in Hot Rod Mag about my thoughts on the "Import
Movement" which he pointed out to me. He obviously knows ALOT. He has quiet a few credible references(how
many other imports have you seen in HRM?).. some people hate some like him and some are just perplexed by
the whole deal. Ive seen the pistons first hand... and Ive seen them increase the tuning window considerably (as
advertised). The stuff we discussed wasn't a bunch of hot air, it was the real deal as far what works and what
doesn't. For the guys that have been "burnt" I could imagine how mad you must be. But he is sure knowledgeable
and you cant discount that. Im not pro anyone but I did like what I saw as a result as far as the pistons go.




[Modified by Dublocivic, 11:11 PM 2/20/2002]

pornstarSR

wel thanks thats good news to hear

88CRXHybrid

I am not asking about the tuning window increase but the HP increase itself without more tuning. Would it be feasible to buy the weisico's from another company and sand them down yourself? Wouldnt this be considerably cheaper? how hard would it be?

threatcon13

I agree that he is knowledgable, but I have heard too many bad things about his products. also the mysterious supercharger which will never come out adds to my suspicion...hes supposedly had prototypes running since 99? riiiiiiiiiight

G

I am not responding to you in particular, allmotordc2, but if you (or any of us) do some research on performance motors, there is great effort in promoting swirl, or actually fuel/air mixing. A good mixture, or more even mix of air/fuel makes more power than a poor mixture. For an example, a room filled with particles of wood dust on the ground will burn where you lay the match, maybe even spread a bit. When the wood dust is mixed and flying through the air, it has been known to explode (work safety videos). Soooooo, if the funny little wall can cause the mixture to stir as it (piston) rises/compresses the air/fuel (especially as it closes in to the roof), then one would think it promotes mixing of the air/fuel. In simple physics, it seems to work. Then, they are pretty much cheaper than some other brands of pistons.......Cheaper is good enough for me, hehehe....

Dublocivic

88crx: if you think about it... if you install something that increases the size of the performance window and when tuned it makes more power, or if anything allows for more room for error than I think it would be a good part to have regardless of who it comes from. As far as cheaper I dont know you'd have to call Brian @ Wiseco to see what you could get.
Allmotor: I know I waited for that charger to come out well...hmmm.. since the beginning in the old Import Chat board. I chose not to wait... whether it be some fictitious ploy for business or if it is real (and if it is a ploy it was a good ploy at that because it got alot of us all worked up..LOL) I chose to make my own footprint with a custom Vortech setup (we'll see how that goes..)
Like G says about swirl...The pistons work Ive seen it with my own eyes so I am sold on the RW pistons. Ill post what timing I run, boost, and octane and you can be the judge.

falcongsr

I would like to know how the "floor of the combustion chamber" aka the piston can promote swirl.

The concept of a "wave" rolling across the surface of the piston its a little too far beyond my grasp - for now. Does anyone besides Larry 1) understand it 2) believe it?

I am not bashing Endyn. I am not promoting Endyn. I am trying to start a technical discussion.

threatcon13

thats cool. I feel bad for everyone who was waiting for the supercharger to come out, it is good that more people are seeing the truth and moving on as you did. I personally do not have any experience w/ the rollerwave pistons, if they are putting out good numbers then I just think that Larry's business practices are extremely SHADY, as evidenced by the dispute (all facts,not opinions) which occured between importbuilders and fendyn.

VaporTrail

Not only do I understand it, I also believe it does in fact, do what he says it does.

I built a B20VTEC with 12.5:1 CR RW pistons. We had a slight leak from the head gasket after about 1400 miles, so we pulled the head to inspect everything. When we removed the head, you could see where the carbon residue had started to build up on the piston. It was all concentrated in between the "lips" that Endyn adds to promote swirl. Whether or not this makes a difference in power, I don't know, but this proved to me that it at least worked as advertised. Theoretically, his principles are sound.

People, these are just wiseco pistons, which have been deburred and a little lip which was added to promote swirl. In the very worst case scenario, they are just going to be like any other piston, at a price that is fair. I really like the fact that they are deburred, which is why you can run more timing on these than other pistons at this compression level.

b18bturbo

I agree. I dont think Larry is all talking a bunch of mess. It actually does work. His theroy is indeed correct in how the swirl will take place inside the combusinton chamber. I also suspect that with the rollerwave sanding approach you can run a little higher advance as well as bosot pressure.

b18bturbo

I would like to know how the piston works with oversized valves though. I am not too sure how it would work.

DaveF

was this b20 vtec in a green 92-95 bodystyle hatchback??and got sold to a kid named kevin up here in PA

VaporTrail

Larry has told me they are relieved to accept up to and including a 1mm over valve. Best to clay check for clearances anyway, it's cheap insurance.