Hello. I have A 1.6L, 8v engine slated for rebuild. I have seen plenty of rebuild kits, but all with cast pistons (more CHINA SCRAP?). I've e-mailed wiseco twice but I guess they don't want my business. Balanced, forged, lightweight pistons are what I want. Suggestions?
light weight would make crank unbalanced.
find a dealer , most mfg never answer email. ( all 1 million questions)
i think there are factory pistions that are forged, for the GTI model swift?
IIRC.
Go to Teamswift join and ask, lots of turbo action there and forged everything.
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91'-8v,2dr,4wd,Conv. Market#E03
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Rebuilding your engine with forged pistons doesn't really make sense. The only real benefit you'll see from lighter stronger pistons is if you are revving above the stock red line and/or pushing more power and if your doing either of these you should be replacing the rods before anything else as they are the weakest link. In my opinion using higher performance pistons while operating in the original engine specifications and environment will yield a very minimal advantage and is not worth the added cost, especially considering the durability and longevity of the OEM cast pistons. My old Sidekick had 320000KM and my current has 230000KM and there pistons are/were in great shape and many others are at much higher mileage . Also while the crankshaft is balanced on it's own and changing the pistons (assuming there all the same weight) should keep it balanced, but it's not to say the lighter pistons wont change the engines harmonic characteristics.
My advice would be instead of spending an additional $500 - $800 on pistons and rings not to mention the headache of ordering them and the added waiting time.Instead spending the money on other maintenance or a header and exhaust system would be more practical and rewording for the driver.
The OE pistons are cast but are renowned for their strength. The Honda boys use them as low CR pistons in turbo apps. Some guys are running 300bhp on stock Track/Kick pistons.
Rebuilding your engine with forged pistons doesn't really make sense. The only real benefit you'll see from lighter stronger pistons is if you are revving above the stock red line and/or pushing more power and if your doing either of these you should be replacing the rods before anything else as they are the weakest link. In my opinion using higher performance pistons while operating in the original engine specifications and environment will yield a very minimal advantage and is not worth the added cost, especially considering the durability and longevity of the OEM cast pistons. My old Sidekick had 320000KM and my current has 230000KM and there pistons are/were in great shape and many others are at much higher mileage . Also while the crankshaft is balanced on it's own and changing the pistons (assuming there all the same weight) should keep it balanced, but it's not to say the lighter pistons wont change the engines harmonic characteristics.
Header, port, oversized bore are all I plan on doing (not certain on cam due to E-testing)
Lighter pistons = more torque
I've used wiseco's on many small engines (watercraft, sleds, bikes) any they worked very well, and were reliable. Just trying to get A bit more power.
I have A spare engine in the garage...so wasting time means nothing. This engine still runs fine.
I used Wiseco on race bikes. very good pistons and light too. I would be wary of overboring the block. I've seen a lot of blocks cracked between nos 3 and 4 and reducing the thickness of the liner will reduce the rigidity of the block.
I have considered some ally welding across the top of the block to add bracing and hold the top of the cylinder more rigidly but theres no knowing how this would affect the expansion and contraction of the block over temperature.
I have also used Wiesco pistons. What Rihnoman is saying is correct and I have the block to prove it, needless to say I would reccomend against increaseing the bore. The engine should respond well to a new cam, 3Tech can make you a custom grind. I have also done some electronic simulations and I think because of the small valve diamieter and lift the simulations are not as accurate as they could be. But all of this might be useless without the proper fuel and ignition tunning.
Pistons
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