Boost_allways

Hey guys i'm building my motor using WISECO Pistons, rings + upgraded wrist pins & wanna know what piston to wall + piston ring end gap clearance u guys running for 1000+ hp please. I don't wanna make any mistakes, thanks guys.

Muckman

iTrader: (2)

1000hp?... loose loose loose.

Boost_allways

Top compression - 0.028
Bottom compression - 0.030
Oil rails - 0.015
?

OneBadTurboCRV

Something seems off... You are building a "1,000 hp" engine yet asking what to set your ring gap to? Interesting...

Well since you don't understand the basics I will try to help you. There are formulas for this sort of thing. They look like this:

Bore X .00XX" = Piston Ring Gap is .0XXX"

So since you didn't even give us your bore size there would be NO way of helping you. Just throwing out some random numbers could be WAY too severe for your build be it tight or loose. If you search the Google, you will find various equations posted - either get the manufactures recommendations or take your chances using random numbers. It's that simple really.

Boost_allways

Bore is 84mm

tron_

I would contact Wiseco and have a talk with them about the expansion rates on the pistons for something as extreme as a 1000hp setup.

Where are you getting your sleeving done?

Boost_allways

Sleeves done by Golden Eagle mfg

Turbo-LS

iTrader: (4)

for 1000+whp with an 84mm bore you should probably hav .0045-.0050ptw and ring gaps i would imagine to be .0028 on top and .0030 bottom compression rings. loose is the key for that kind of power and heat and you must have a really good crankcase ventilation system. I would do some more research on it though to make sure

Boost_allways

Thanks for ur input bro .

thid92

would like to see your build, do you have any pictures or specs?

kbouchard1092

why the heck would you want 1,000whp?

What turbo are you using to accomplish this....What rods are you using as well

Turbo-LS

iTrader: (4)

When going for that kind of power usually run aluminum rods or pauter x beams, carillo I beams something really highend. Probably a massive Borg Warner turbo or Garrett gt4202

Boost_allways

I got Pauter rods but just need to know how much clearance for that power range, thanks bro .

thid92

post the rest of your setup so we can help.

Boost_allways

My short block is a 84mm Golden Eagle mfg sleeved B20Z2 with
Wiseco pistons & rings + upgraded wrist pins
Pauter billet X beam rods with ARP 2000 3/8 bolts
ERL 5 point main girdle
oem balanced & micro polished crank done by Golden Eagle
ATI race damper for 11000+ rpm
Endyn oil pump
Moroso 5.5 qrt oil sump
Vybrant adjustable timing belt tensioner
electric water pump
Golden Eagle head studs & main studs
ACL Race Performance bearing with DFL coating
ClutchMasters 700 series twin
ARP flywheel bolts
ARP damper bolt
Toda Racing timing belt
BEP S372 turbo
Twin entry t4 Top mount manifold

SPOOLINmatt

.0045 for 1000hp? No thanks!

blackeg

Yea, im at. 0045 in the 500s for hp. Id want much larger than that. **** lots of people run bigger than that with 75mm vitara setups

Turbo-LS

iTrader: (4)

hence why i said more research im not positive on PTW with that kind of power. there are alot of factors to consider when it comes to ptw clearence. Alloy compound, fuel, power, etc.....

yeah vitaras are loud motors, they have alot of PTW because there not really a piston designed for a honda block, they just happen to work and .0045 isnt terrible but on a piston that doesnt expand much its not nessesary. Im at .0035 on my stock sleeve build with SRP's but they dont have the expansion rates or say cp's or je's or weisco's with lower silicon content in the alloy used.

NonovUrbizniz

that's just because they know it will work and don't know what else to set it at.

.0030 is plenty loose for a vitara build, but those are cast pistons so it's not even the same thing.

Here's what I don't get from the OP... If you don't know what specs to use, or even the right avenue to find out... who is building your motor?

I mean I know what numbers I want and where but I don't have the machines, tools, or measuring instruments to check everything so I sent out my bottom end to someone who does...

Your best and safest bet as far as determining the specs is to talk to the piston manufacturer about your goals and setup... or to talk to a reputable engine builder and have them set them.

Good Luck!

blackeg

Well another issue with vitaras is that they come a little undersized for the bore. My vitara was I think. 003 ptw and wasn't loud. The point of my comment is that you can run a ptw that's a tad big and have the engine hold out well.

Id say a good engine builder's opinion is just a good as the manufacturer. Example is that im pretty sure cp recommends a pretty small ptw like. 0035. For an engine making 400 + hp I think you will find many builders suggest going larger than that

Turbo-LS

iTrader: (4)

Weisco recommends .003 on their spec sheets but I know if you run a piston that tight with big HP it will a black death massacre on them pistons lol

Spawne32

iTrader: (3)

supertech recommends .0050 for full drag

sleepencivic

The coated wisecos spec sheet calls for .0025 PTW measured off the coating. When I called them that is for low boost applications. The tech told me for 450-500 hp range to run .0035 off the coating and said the coating will wear off and gain a extra .0005 bringing the PTW clearance to .0040.

For the OP ditch the wiescos and get a set up CP's and talk with the company when you buy them or call CP they have tech support as do Weisco. Im guessing the PTW for 1000 hp would be in the .0045-.0055 zone with the CP's they expand alot.