Favoured: 0
|
|
|
TOPIC: Re:HC pistons
|
Reggie (User)
Senior Boarder
Posts: 325
|
|
HC pistons 1 Year, 8 Months ago
|
|
|
Worth it? Do they introduce new issues (reliability)?
|
|
|
|
 Logged
|
|
|
The administrator has disabled public write access.
|
Reggie (User)
Senior Boarder
Posts: 325
|
|
Re:HC pistons 1 Year, 8 Months ago
|
|
I'm reading that they yeild a 6-9% hp increase. Given this data which would be a better way to go. Hc pistons, 42mili mikuni, both? |
|
|
|
Logged
|
|
|
The administrator has disabled public write access.
|
|
|
|
Re:HC pistons 1 Year, 8 Months ago
|
|
Carb would be the easier of the two to do. But I don't have either so I can't give a good comparison.
|
|
|
|
Logged
|
|
|
|
|
|
The administrator has disabled public write access.
|
|
|
|
Re:HC pistons 1 Year, 8 Months ago
|
|
I asked Curt about the increase of HP/TQ on his after he installed the HSR. His Dyno results didn't improve from the stock carb. Look in the thread "HSR rich idle" on pg 9. I would be curious to hear from someone with dyno results before and after HC pistons. HC's could go on my winter "to do" list.  |
|
|
|
Logged
|
|
|
dave
|
|
|
The administrator has disabled public write access.
|
|
|
|
Re:HC pistons 1 Year, 8 Months ago
|
|
i did my top end finished yestuday first promblem right off the bat is hard starting. i have a 310cca battery and it has a hard time turning it over,but keep in mind not only went to 10.5:1 wiseco pistons but i also decked the heads, had them ported and polished and triple cut the vavles. as for the carb i have the 40mm carb but it is jetted and i have a hand ported intake with a bak.also have dynatek3000 cdi set at 4750 and pipes. |
|
|
|
Logged
|
|
|
The administrator has disabled public write access.
|
greenpus (User)
Platinum Boarder
Posts: 1674
|
|
Re:HC pistons 1 Year, 8 Months ago
|
|
mkayx wrote:
i did my top end finished yestuday first promblem right off the bat is hard starting. i have a 310cca battery and it has a hard time turning it over,but keep in mind not only went to 10.5:1 wiseco pistons but i also decked the heads, had them ported and polished and triple cut the vavles. as for the carb i have the 40mm carb but it is jetted and i have a hand ported intake with a bak.also have dynatek3000 cdi set at 4750 and pipes.
do you have the thicker battery cables and starter cables? you'll probably need them now if you don't. also you might want to consider upgrading your starter
|
|
|
|
Logged
|
|
|
The administrator has disabled public write access.
|
|
|
|
Re:HC pistons 1 Year, 8 Months ago
|
|
My understanding is that the 42HSR gives much better throttle response, but the HC pistons (which I installed) add horse power.
I've wanted to get her dyno'd but have had trouble getting the intake sealed.
I'm going to the Rice-O-Rama in North Brookfield, Massachusetts, this weekend and am hoping that a little tightening and a lot of throttle will clean her out! 
Ray |
|
|
|
Logged
|
|
|
Ray
|
|
|
The administrator has disabled public write access.
|
texasscott1 (User)
Two of a kind
Platinum Boarder
Posts: 1824
|
|
Re:HC pistons 1 Year, 8 Months ago
|
|
|
Reggie wrote:
Worth it? Do they introduce new issues (reliability)?
Mine may be the unpopular view but I don't think they're worth it. Hard starting, preignition, reliability to name a few. One thing I've never seen mentioned is gapless rings. You'd be surprised at how much horsepower can disappear through the ring gaps.
Your low compression engine can produce a lot of extra power even with the stock carburetor if it's just opened up. The right cams can pack the cylinders better, the right 2 into 1 exhaust can actually help pull the exhaust out of the cylinders, a little head work and I think the results would be surprising.
The stock carburetor jetted correctly should be good for 80 or so horsepower so unless your planning on a lot more than that you can save some money there.
Scott B.
|
|
|
|
Logged
|
|
|
My 99 Standard Test Mule
Scott B.
|
|
|
The administrator has disabled public write access.
|
Reggie (User)
Senior Boarder
Posts: 325
|
|
Re:HC pistons 1 Year, 8 Months ago
|
|
texasscott1 wrote:
Reggie wrote:
Worth it? Do they introduce new issues (reliability)?
Mine may be the unpopular view but I don't think they're worth it. Hard starting, preignition, reliability to name a few. One thing I've never seen mentioned is gapless rings. You'd be surprised at how much horsepower can disappear through the ring gaps.
Your low compression engine can produce a lot of extra power even with the stock carburetor if it's just opened up. The right cams can pack the cylinders better, the right 2 into 1 exhaust can actually help pull the exhaust out of the cylinders, a little head work and I think the results would be surprising.
The stock carburetor jetted correctly should be good for 80 or so horsepower so unless your planning on a lot more than that you can save some money there.
Scott B.
2003 1600, ported intake, bbak, v&h propipe, 31t pulley. Dyno'ed @ 60hp. 80hp possible?
|
|
|
|
Logged
|
|
|
The administrator has disabled public write access.
|
|
|
|
......................................................................
......................................................................
......................................................................
......................................................................
......................................................................
......................................................................
......................................................................
......................................................................
......................................................................
-->
