Ive always been under the impression that anything smaller than a .748 pin on a street aplication wasnt a good idea. Recently though, Ive seen a few people with .708 pin set ups and It brought up a couple of questions for me...

1. Is there any real reliability sacrifice when running a .708 pin?

2. Is there any sacrifice in longevity at all?

Any feedback is greatly a preciated

 

lol

 

dont do it

Honda put a 21 in there for a reason

 

Steve, doesnt your stroker piston set up use 708 pins? How have they worked on on daily drivers? Would it work with the H22 motor as well as it does on the B series?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NiceDc2r &raquo;</TD></TR><TR><TD CLASS="quote">Steve, doesnt your stroker piston set up use 708 pins? How have they worked on on daily drivers? Would it work with the H22 motor as well as it does on the B series?</TD></TR></TABLE>

yes, and they work flawlessly. they would work fine on an h22 as well, lisa used them to make.....mmmmm...about one thousand horsepower on her civic, so i'm sure they'll be fine for some 200 something hp n/a engine.

 

what type of pin do you use? what metal/alloy is it made of?

 

i've had em in my boosted b16 with an ls crank for bout a year now, no problems

 

tool steel.

 

Steve, do you have any out there running hard with a decent amount of mileage put on the motor? 20-30k+ maybe?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NiceDc2r &raquo;</TD></TR><TR><TD CLASS="quote">Steve, do you have any out there running hard with a decent amount of mileage put on the motor? 20-30k+ maybe?</TD></TR></TABLE>


yup. more than that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boost_addict &raquo;</TD></TR><TR><TD CLASS="quote">i've had em in my boosted b16 with an ls crank for bout a year now, no problems</TD></TR></TABLE>
If you don't mind me asking..how much power do you make?

 

don't know really, never dynoed, only street tuned. i ran an 11.7 @ 123 in an eg hatch with problems gettin in to 2nd gear. motor's got about 15K hard driven miles on it and no problems so far

 

Honda also made the motor stock should we not build it either?

The .708 pin is fine for the street you will have no problims with it.

Like Steve said. I have also seen over 1000 hp on the .708 pin.

Dont be scared of the pin. Be scared of the guy putting it together. lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TOM J &raquo;</TD></TR><TR><TD CLASS="quote">Honda also made the motor stock should we not build it either?</TD></TR></TABLE>

lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TOM J &raquo;</TD></TR><TR><TD CLASS="quote">Honda also made the motor stock should we not build it either?

The .708 pin is fine for the street you will have no problims with it.

Like Steve said. I have also seen over 1000 hp on the .708 pin.

Dont be scared of the pin. Be scared of the guy putting it together. lol</TD></TR></TABLE>

So yur saying your pistons dont d-shape the pin boss with .708 pins?

You might want to start looking @ the pistons of your customers .......

You know where to look right?

 

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

So yur saying your pistons dont d-shape the pin boss with .708 pins?

You might want to start looking @ the pistons of your customers .......

You know where to look right?

</TD></TR></TABLE>

LOL this is funny..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MHRacing-310 &raquo;</TD></TR><TR><TD CLASS="quote">LOL this is funny..</TD></TR></TABLE>


I guess you run .708 pin on the street huh

whats a .708 pin wall wt.. 64.2 gms
what does a 21mm tapper 66.7 gms

2 grams less and its weaker ?

I guess everyone has there own way

 

MAX_CFM

Where to start lets see.

317 sets thats 1268 pistons with a.708 pin last year. 70% are stroker kits. I would say about 20% are turbo.
I have yet to see a Arias Piston D shape around the pin tower.
I have seen other brand pistons D shape due to improper pin engagment.
My new race car I use a .708 pin and it is only .060 straight wall no taper its about 34 grams.

To sum this all up.
Rick if you use a ARIAS Piston and a ARIAS Pin and they break because of the pin I personaly will give you a new set of pistons on me at no charge to you. Thats how sure I am that there is no prob running the .708 pin in a street car if you know what you are getting yourself into.

MAX_CFM
If you would like I can ship you a piston that I use in my own car so you can see how it works.
Let me know if you would like me to do this for you.

A little info for you.

I personally run a .708 pin in my friends street car now for about 2 years with aluminum rods and it is turbo charged. It makes about 600hp and we still run the same .708 pin when I built the motor.

Tom Jung


Modified by TOM J at 2:43 AM 6/8/2004

 

damn. moded.

 

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

Where to start lets see.

317 sets thats 1268 pistons with a.708 pin last year. 70% are stroker kits. I would say about 20% are turbo.
I have yet to see a Arias Piston D shape around the pin tower.
I have seen other brand pistons D shape due to improper pin engagment.
My new race car I use a .708 pin and it is only .060 straight wall no taper its about 34 grams.

To sum this all up There is no prob running the .708 pin in a street car if you know what you are getting yourself into.
If you would like I can ship you a piston that I use in my own car so you can see how it works.
Let me know if you would like me to do this for you.

A little info for you.

I personally run a .708 pin in my friends street car now for about 2 years with aluminum rods and it is turbo charged. It makes about 600hp and we still run the same .708 pin when I built the motor.

Tom Jung </TD></TR></TABLE>

Ok im not trying to be an ***
I have just built alot of engines and seen things......

I under stand on race engines.....
I run some pretty small stuff.....

But street engine making a ton of power I would feel safer with a big pin
Thats my 2 cents if you want me to check out some pistons
send them my way

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TECH43 RACING INC. &raquo;</TD></TR><TR><TD CLASS="quote">damn. moded.</TD></TR></TABLE>


THERES THAT WORD AGAIN!!!!!!!! MODEDD!!!!

 

MAX_CFM

I will send you something to look at give me your adress where you would like me to send it.

 

What about a .669 pin, (17mm)? Would these in tool steel be able to support a 300+ HP engine?