What is the benifit of getting thies pistons? How much power will they give me? What other mods would I need with thies to make sure they are safe. What kinda fuel mods would I need? And last. What's a decent price to have the pistons installed?

Thanks.
Chris

 

I wouldn't get them with poopy CA gas. You would need Technoaquare to really back the timing off.

 

I Didnt think about that......Does a few octane make that big of a difference? I know 91 aint much- but it's not good enough?

Say crappy gas wassnt an issue, what kinda power would they make? what fuel mods would I have to make?

Chris

 

Well they wouldnt make much power without doing other things to compliment them..Not one mod is a majical solution they all work together..To see anyreal signifigant gains you would neet to do EVERYTHING...Intake,plenum,heads,cams,piston might as well do the rods too, then headers, cats and full exhaust. plus an ECU flash cause you would be running lean as hell but man once your done you probably would have well over 300 hp at the wheels but an empty wallet!!!You better of getting a SC or turbo kit for that money and build up the engine when you need to..

 

I think that's the wrong way to think about it. "When you need to" usually means when you throw a rod from getting too greedy with the boost, if you're not extremely careful.

Set a budget and if it's not astronomical, then don't go N/A. N/A is always the more expensive alternative on a per whp gain basis. Think about what it would cost you to simply raise the compression to 11.5. You would need the pistons ($1200), then the labor would probably run $500+, ECU flash from T-square ($600?), and then in NJ just to be safe, you would want to run 94 octane at all times ($3.00 extra/tank). So basically you're looking at $2300+ initial investment for a modest gain.

Beyond that, if you don't change out the cams, rods, springs, and retainers while the engine is torn apart then you're wasting your time and money on labor down the road, not to mention the fact that you aren't taking full advantage of your higher compression.

I had an ITR so this was my frustrating, and financially draining reality for a few years. It sucks. I would go FI.

 

I emailed sgp about these pistons awhile back and they said that the pistons would be good for around 15whp with no other mods. However they also answered my question about the crappy 91 octane gas by saying that using 91 would be pushing it and I would probably need to get the car dyno tuned. Not worth it in my opinion unless you plan on going all-motor and have access to higher than 91 octane.

 

Where are you gonna get the 15whp? When I raised the compression in my ITR all the gains were way up in the rev range (VTEC BS) and not very significant below 5700rpm (VTEC changeover).

 

Increasing compression forces the same amount of air to combust in a smaller space making a relatively larger explosion. There is more power and I think 15 HP is a fair estimate for this. Conversely, there is more heat as a byproduct which increases the risk of detonation. Thus, more octane is necessary. And probably less timing as mentioned above. Personally, I won't be building the bottom end as the power gains are def. not HP/$ sensitive. It is stong enough to take cams and bolt ons and maybe a 75-100 shot only when needed. If I pull on a car then I won't spray. Only when I begin to fall behind will the laughing gas be on. Anyways, I would change compression lower if I was going FI and higher if I wanted to race it all the time NA. But for a street car already seeminly running at the brink of ping, I wouldn't do it.

 

What is the stock compression? Maybe 10 hp by increasing compression.

 

I wasn't debating the hp estimate. I was only reporting that my highest gains were in a rev range that is really only used for racing. Are you saying that the peak gain should be located at peak hp?

 

First of all, I think the terminology that is being used and has been used on this website is flawed when referring to peak numbers. A baseline might have a peak HP show at 6K. This is where the HP is highest. Say at 6.5K HP is 10 HP LOWER. Now if you do some mods and change the HP and the dyno shows that at 6K HP rose 10 HP and at 6.5K HP rose 25 HP. What happened?

It seems like everyone here says well we got 10 HP at the peak but 25 HP at redline (or 6.5K). This is not accurate.

A better thing to say is that you have shifted your peak. 6K is no longer the peak of your HP graph. It is now 6.5K. You see? So with that, what are you asking me? Even without that, I don't understand your question.

 

15hp sounds nice... but that is absolutely the opposite direction of FI.

not that its a bad thing; but keep your final goal in mind... also; if your gonna crack the engine to put pistons in; might be financially worth while to save up for whatever else you want in there; to cut down on install cost.