How come no one has come up with this yet? I would think this would be a HUGE seller.

Does anyone sell these?

 

Besides Honda? There are other OEM type replacement companies that sell cast pistons, I think Federal Mogul does some but I haven't had a coffee yet so I can't be sure.

 

I'm talking about being able to buy 84mm cast pistons in different CR over stock like 11.5:1.

 

Why would you want these?

 

So you could build a strong running B20 VTEC with out having to buy forged pistons. Instead of buying $500 pistons and maybe aftermarket rods you could just get a set of ~$200-250 cast pistons. I don't think that forged pistons are needed for these mild street builds.

 

What makes you think they'd charge less? They could just as easily mark them up more. You could just as easily say that making cheaper forged pistons would be a big seller...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sly_106 &raquo;</TD></TR><TR><TD CLASS="quote">Why would you want these?</TD></TR></TABLE>

$$

I too have been asking this very question for a while now. Domestics have had the choice of cast and hypereutectics forever. This really reduces the price of building a strong street engine.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Davep &raquo;</TD></TR><TR><TD CLASS="quote">How come no one has come up with this yet? I would think this would be a HUGE seller.

Does anyone sell these? </TD></TR></TABLE> you should try contacting Sparkracing. They had some custom cast 84mm 11.5:1 in order.. here was the link: https://honda-tech.com/zerothread?id=1039537

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Davep &raquo;</TD></TR><TR><TD CLASS="quote">So you could build a strong running B20 VTEC with out having to buy forged pistons. Instead of buying $500 pistons and maybe aftermarket rods you could just get a set of ~$200-250 cast pistons. I don't think that forged pistons are needed for these mild street builds. </TD></TR></TABLE>


why go cheap, do it right the first time

 

inexpensive has nothing to do with doing it right.

 

yes BUT it sounds like hes building a pretty all out or big motor, why not get forged for the extra strength ?

 

people through in b16 or ctr pistons in 81mm cars ALL THE TIME cause you can keep your stock rods and have 11:1 for cheap. you do not need forged pistons for the average street build and you dont need aftermarket rods either.

if you have a b20 you have either 9:1 or 10:1 cr options (roughly depending on the head) but if you want more than that you have to drop 400 or so on pistons and 300-400 on rods because you now have floating pin pistons.

making a jdm p72 or b16a piston in 84mm would be a HUGE seller for all those b20 people out there looking to get some decent CR in their motor without having to mill or drop a huge amount of money

edit, just checked that other thread and 349 for a set of pistons is a bit much i woulda liked to see about 250 maybe but hey its still cheaper than 800+

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jason bouchard &raquo;</TD></TR><TR><TD CLASS="quote">why go cheap, do it right the first time </TD></TR></TABLE>

Cheaper doesn't mean worse.

Are there forged pistons that can match the ring lifespan of cast pistons?

 

For all motor cars hypereutectic pistons in many ways are better than forged pistons. Tighter clearances, long ring life. Forged pistons are better if you are running nitrous or forced induction because the can tolerate a little detonation and the high heat of nitrous or turbo engines.

 

you can get wiseco pistons for around 400 or so. they are proven power makers.

 

I just think that forged pistons are not needed for street NA engines, I don't think that its being cheap.

How many people make good power with OEM cast pistons?

It just something that I've been wondering about.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jerseykid609 &raquo;</TD></TR><TR><TD CLASS="quote">What you think and what is right is two completely diffrent things.. lemme ask you why would there not be such a product on the market ? easy cus no one buliding a motor is gonna want a casted pistion for preformance. frankly there weak. u ask how many people have made good power on oem pistions? i ask u how many of them are still running after a few months? for every 1 good oem pistion story u give me i can give u 10 storys were the pistion faild plain ans simple there not made cus noone is gonna buy cheapo pistions that cant cut it . </TD></TR></TABLE>

well said john

 

Well I don't agree with all that but I guess your right because no one sells them. I wouldn't mind being able to decide for myself though.

 

so your saying that all stock motors are weak then cause they dont have forged pistons? should the first upgrade for all cars be pistons?

for someone like me wanting a simple build that would only want to rev to 8 and use R cams and have 11:1 cr forged internals would be nice but arent needed.

 

There will be soon (?)..... with some very cool features....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jerseykid609 &raquo;</TD></TR><TR><TD CLASS="quote">

i never siad that stock pistions are weak for a stock app.. im talking about a high compression "built" engine app there thats all remember more compression more pressure and heat there are limits to casted pieces. once thoes limits are met u go to a forged piece. note the term "built" </TD></TR></TABLE>

ever considered tuning?

 

Consider the fact that omniman made 220 - 240whp+ on OE cast B20Z pistons with no problems. There are also quite a few 210+ 1.8's running OE cast pistons in 11+ CR with no problems either.

 

A)This is the ALL MOTOR forum, boost goes to FI forum.
B)I am willing to bet 99.9% of the people looking for a cast piston are not looking to go over roughly 12:1 compression. These are for street engines. Most builders understand this.


This is not Building for Dummies. Most people here understand the stregth/weakness between the two piston materials....The point is that high dollar stuff is overkill in some applications.

 

Simple Test

Get a 5lb whacking hammer and hit the dome of an OE piston. You'll be surprised at the strength. I know I was.

 

Building without cast pistons has nothing to do with ethics. Offering more useful products for a customer seems like a great way to get customers.

I hardly see an engine with cast pistons tuned to a proper a/f ratio with the right amount of timing for the octane available as a weak point, let alone unethical.