Ka-T pistons and rings, suggestions on brands?

[Redsunz916]

im bought to order up all my pistons.

im looking at the supertech pistons that make 8.5:1.

any companies out there better? ive never heard anyhting about these pistons

they sell them on ka24de.com? so i ono...


doing this with stock 93 cams, will it be reliable? at the same time make alot of power?

im thinking about doing standalone megasquirt and converting to MAP, also wanna maybe upgrade the head, by port and polish, and hone and polish the intake manifold.

gimme some pointers, this is my first inside tear down.

im forealz, help me out.

:rawk:

[Redsunz916]

was also thinking about doing jwt cams

.390" Lift / 275 Degree Duration

is this motor gonna be a good build or bad idea? shoot me ideas and suggestions, please dont flame me

[2forty]

im getting wiseco 9:1 CR .20 over. the more you lower your CR, the less power you will make but it will be safer to run higher boost. how much boost are you planning to run?

[RBS14]

f that.

If you're going with wiseco, go with 90.5mm's. I'm not going kat, but I'll be using wiseco 10.5:1 90.5mm pistons with a shaved head. 90.5mm yields just under 2.5l, which is sweet imo. Pick up some extra torque, without increasing stroke, best of both worlds.

[Redsunz916]

i was thinking of going with these The Supertech pistons are 0.5mm (0.020") oversized and are now available in 8.5:1CR OR 9:1CR on the KA24DE, which make them ideal for forced induction (turbo/supercharger) and nitrous applications.

Complete set of 4 Supertech coated pistons in 8.5:1 Compression Ratio - Price: $549 Sale Price: $489

im thinkin of running on the T25 till i can afford a t28 10-15 psi

[veilside180sx]

The KA has plenty of displacement. Besides flirting with that thin of cylinders on a highly strung motor isn't recommended anyway.

I would either run 9:1/89.5 Wiseco's or 8.8:1/89.5 Arias if it were me.

Wiseco's have the largest top ring land for resistance to damage from detonation.

These are also the only 2 piston sets to withstand 600 + rwhp in a KA, as of yet that is.

[Redsunz916]

this is my plan


jwt cams w/ .390" Lift / 275 Degree Duration
Supertech coated pistons in 8.5:1
Port and polished head
honed/polished intake mani
ssautochrome manifold
arp bolts/studs all around

im aiming for reliable track car, with much power and doo doo amounts of torque

but REliable is the key main idea.

[Redsunz916]

im shootin for like 350-400 im not a big Hp person, i got my 67 mustang for solid steel Hp lol that mother is at 475

[kandyflip445]

How much does the Mustang weigh??

[veilside180sx]

I hope your'e reinforcing that ssa manifold if you want reliablilty out of it.

[RBS14]

The KA has plenty of displacement. Besides flirting with that thin of cylinders on a highly strung motor isn't recommended anyway.

Actually more displacement without increasing stroke is almost always a good thing. There are a few 2.5l ka's running around, and they've held up very well.

[veilside180sx]

Actually more displacement without increasing stroke is almost always a good thing. There are a few 2.5l ka's running around, and they've held up very well.

The only ones I know of though are NA, not FI. I guess I'm looking for more power than most, and the advantages don't outweigh the disadvantages to me.

[TheWolf]

the supertechs sound nice from their description. We've had good luck with CP pistons as well which should be a little cheaper but not as many features. Mahle Motorsports is going to be making some ka24det soon which thouse should pwn all.

[SpeedMonkeyInc]

Or you could buy the OS Giken for almost twice the price of the other pistons! I don't get why they charge so much. I am sure the OS pistons are nice and all that but twice as nice?
http://www.enonvativforce.com/ka24det.htm

[kandyflip445]

What are other pistons made out of? The OS say they're aluminum.

[kandyflip445]

I guess Ross and others are aluminum also.

[S14DB]

http://forums.nicoclub.com/zerothread?id=133996

[Redsunz916]

yeah i got a idea with the ssa manifold. I was thinkin to weld brackets across so less weight is on the bottem of the manifold, and support by 2 spots instead of a big loop then the turbo hanging. i ono tho, im not sure, to bored out and resleeve the block it will cost as much as getting a SR, i duno?

[veilside180sx]

Bore out and resleeve the block? I think you think the block is aluminum. You don't resleeve a cast iron block (what the KA is).

Boring a block averages at a machinest at around $15-20 a cylinder. If that's expensive, then your'e playing with the wrong toys.

[orion::S14]

im shootin for like 350-400 im not a big Hp person...

Then leave the head alone.

KA head flows PLENTY of air stock...JWT cams on an otherwise stock head will be perfect for less than 400rwhp.

If you wan 600...then do head work...but it's expensive and basically uneeded on a forced induction motor.

My reccomendation would be:

9:1 pistons (no brand preference), .020" over (89.5mm bore)
Aftermarket rods
Stock headgasket (it's a good "fuse" for detonation)
JWT cams

...and some better manifold. With the money you'll save by not doing headwork, you can buy a decent manifold (My RevHard has held up greatunder lots of track abuse at ~300rwhp, 12psi, stock block).

- Brian

[Jeff240sx]

I've been a stock headgasket proponent for those under or around 400whp.

I like CP/Crower combo. Currently have JE/Crower combo. But the JE have some piston slap during startup.
-Jeff

[kandyflip445]

You O-ringed your block though, didn't you Jeff?

[ledzeppelin240]

I would port and polish the cylinder head myself. Not only does it increase air flow, carbon buildup is stopped by having a smooth combustion chamber and exhaust ports.

[TheWolf]

the reason the JE's have slap at startup is because JE uses a different alloy on alot of their pistons. On average for small bore import engines, we see CP and Mahle ask us for a .0035" clearance, ross on a .0043" clearance and JE on a .0055+" clearance. Add another .001" to that if you plan to run nitrous. the CP's run the same clearance as your stock pistons so you should experience no piston slap. The Je's have to warm up and expand before they'll settle in. Ross makes some nice pistons but I'm not sure I'm a believer in their "top fuel" army green coating. Ceramic coatings can definitly help with spool.

[S14DB]

Mahle Motorsports is going to be making some ka24det soon which those should pwn all.
You know when the mahle's are coming out? Part number?

[ryan hagen]

my block is getting bored, they found a hole in cyl one, they installed a melling cylinder sleeve, they said it was $35+ $80 labor, shit sleeve those out to 91mm in your ka, the sleeves are suposed to be alot stronger than the rest of the block. i wanted the whole thing sleeved then but cant afford it right now.

[TheWolf]

You know when the mahle's are coming out? Part number?

No but when they're in stock I can do a GB. We get them at the wharehouse direct pricing level so expect around $350 a set with rings included. :wiggle:
I'll call today and see if they have an update, seems this nascar chase thing has them loaded up with orders.