I am asking this question for two reasons, one being that I seen everyone recommending not to get SRP's and why are they so bad? They been around alot longer than some piston companies and are big in the domestic market. So I'm kind of confused why they are good enought for domestics, but "dog ****" for imports????

 

i think the silicone content is lower (i think).... silicone helps with expansion if i recall correctly. the lower silicone content in the SRPs means that the piston doesn't deal with high heat (ie high hp) as well as a piston with a higher content.

I think i remembered it right, I might have it backwards

 

That's a good explaination, anyone else? Experience?

 

you know i think i have it backwards. i'll find out for sure.

 

They basically aren't as hard of a piston. They don't take as much heat as some of the others. You can compare densities and such on the JE website. It shows you the difference between the real JE pistons and the SRP pistons. They are good pistons for a street setup, you won't get too much piston slap, because you can run a tighter piston to wall clearance, kinda like a stock piston.

Here is something you can read up on. GO halfway down the page and you can see the difference. The tinsile strength isn't as high and they have a lower expansion. This is what keeps the quiet.

http://www.jepistons.com/pdf/2006-sportcomp1.pdf


Modified by 93turbo16 at 8:30 PM 4/25/2006

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93turbo16 &raquo;</TD></TR><TR><TD CLASS="quote">you won't get too much piston slap, because you can gap the rings a bit tighter, kinda like a stock piston.
</TD></TR></TABLE>

ring end gap has nothing to do with piston slap. You are thinking of piston to cylinder clearance.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93turbo16 &raquo;</TD></TR><TR><TD CLASS="quote">They basically aren't as hard of a piston. They don't take as much heat as some of the others. You can compare densities and such on the JE website. It shows you the difference between the real JE pistons and the SRP pistons. They are good pistons for a street setup, you won't get too much piston slap, because you can gap the rings a bit tighter, kinda like a stock piston.

Here is something you can read up on. GO halfway down the page and you can see the difference. The tinsile strength isn't as high and they have a lower expansion. This is what keeps the quiet.

http://www.jepistons.com/pdf/2006-sportcomp1.pdf</TD></TR></TABLE>
SRP's are good for lower boost applications. I have the greddy 18G in my car and I have a set of SRP's. I'm only seeing 15 psi on the boost gauge, which is plenty lower than some of the others guys on this board. I'll check it out at work the big difference between the alloys tomorrow. I work in the aluminum and steel industry and have many books on this kind of crap.
On TOPIC:
I have piston slap at start up, but that could be caused by one of the bores having a larger out-of-round difference than the other 3 when I rebuilt, but still within limit. It is gone within 3 seconds and doesn't bother me really. So far I'm happy with SRP's.

 

why buy srp's when u can buy wiseco or cp's for 50 bucks more and get a piston that handles at least 3x more power

 

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

ring end gap has nothing to do with piston slap. You are thinking of piston to cylinder clearance.</TD></TR></TABLE>

you are correct at that. So I can rephrase it. Being that these pistons don't expand as much as other forged units, it reduces the amount of piston slap, because you can run a tighter clearance.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93turbo16 &raquo;</TD></TR><TR><TD CLASS="quote">They basically aren't as hard of a piston. They don't take as much heat as some of the others. You can compare densities and such on the JE website. It shows you the difference between the real JE pistons and the SRP pistons. They are good pistons for a street setup, you won't get too much piston slap, because you can run a tighter piston to wall clearance, kinda like a stock piston.

Here is something you can read up on. GO halfway down the page and you can see the difference. The tinsile strength isn't as high and they have a lower expansion. This is what keeps the quiet.

http://www.jepistons.com/pdf/2006-sportcomp1.pdf


Modified by 93turbo16 at 8:30 PM 4/25/2006</TD></TR></TABLE>

Correct me if I'm wrong, but are'nt SRP and JE the same company? They are on the same website now, and made in the same factory!?

 

Yes, they are. SRP are just the lower grade JE. Read that site you will see. That is why I linked it.

 

By looking at JE/SRP's website, there is not too much of a difference in hardness. Yeah, it would make a difference if your running an all out drag car with 30+psi, but for under 500 HP. I think SRP will be fine, I've been leaning towards SRP for my Ls/vtec build. I like the compression of 8.9:1, and it's price is competitive. Like I've said before, I don't plan on going over 450hp anytime soon, and 18psi.

 

I ran srp's until they almost seized my motor. I was running an aggresive tune, but they still went prematurely. I'm using CP's now

 

i run a well tuned (conservative, but powerful) 20-21 psi into my d16a6, with stock sleeves/head, and SRP's and eagles.

it has held up well, and i think it would easily do 400 whp. i am really glad i went with them, and given the opportunity to do it again, with more money, i'd still build the exact same bottom end.

they are more than most people need.

from what i've read, it seems that the usual srp user is cheaper-not always a bad thing, but TERRIBLE when it comes to tuning. cheap out and dont properly tune the car, and your screwed. thats why people kill them. same thing with any other forged piston. usually the tune kills them, if they ever die.

 

You'll be fine with SRPs

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by redzcstandardhatch &raquo;</TD></TR><TR><TD CLASS="quote">i run a well tuned (conservative, but powerful) 20-21 psi into my d16a6, with stock sleeves/head, and SRP's and eagles.

it has held up well, and i think it would easily do 400 whp. i am really glad i went with them, and given the opportunity to do it again, with more money, i'd still build the exact same bottom end.

they are more than most people need.

from what i've read, it seems that the usual srp user is cheaper-not always a bad thing, but TERRIBLE when it comes to tuning. cheap out and dont properly tune the car, and your screwed. thats why people kill them. same thing with any other forged piston. usually the tune kills them, if they ever die. </TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rioninja &raquo;</TD></TR><TR><TD CLASS="quote">You'll be fine with SRPs</TD></TR></TABLE>

Thanks, I'll be heading that direction as soon as I receive my tax refund, which will probably be next year LOL

 

I agree that SRP's are not a bad piston, however, when I had mine SRP's were 350 and the closest competitior was like 550-600 bux. Nowadays you can pick up weisco or CP for almost the same price.

 

haha, I remember my first turbo setup. SRP pistons, 60 trim T3, AFC hack, 3 degrees base retard, and 19 pounds of lovin. I still have one of the melted pistons in my carnage box.
For what I did to them, I guess they were still pretty impressive.

 

 

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


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

Posting pictures without info as to what caused it doesnt help him at all with making a decision, but thanks for that random photo.

 

^ Looks to be a bit more than piston failure dood.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tactic$ &raquo;</TD></TR><TR><TD CLASS="quote">^ Looks to be a bit more than piston failure dood. </TD></TR></TABLE>

What makes you say that

 

with the insane numbers people are making nowadays on STOCK bottom ends (over 300 on d16s, over 500 on b series stuff and h and k) i'd be safe to say most people, if not all people, would be fine with even the worst forged piston! haha

 

and your post did? im just showing results of my experiance with them smart ***

 

I know quite a few SRP piston cars that are making some good numbers and times. It's all in the tune. As was stated before, people who buy a cheaper piston lots of times also cheap out on tuning and it causes failure. No one wants to blame their own cheap assedness so they blame the pistons.

I have never personally seen a set fail because of piston quality. Only because of tuning quality.