Toyspeed.org.nz Message Board

by **Adoom** » Sun May 09, 2010 2:57 pm

So yeh, I had this thought. If an engine running high boost does not pink/detonate/knock, what is the point of running forged pistons?
I intend to rebuild a CA18DET I have, to replace the CA18ET currently in THE STARVIA.
I am tossing up whether or not I NEED forged pistons. I could buy a LINK for the price of a set of "forgies"!!

I will be running water injection which reduces the risk of detonation by lots.
I want to be able to run decent boost with little risk of failure.
If little brother ~SlideWays~ can make 212kw with a 4AGTE..... where the $&#$% is my lots of Kw? :twisted:

by **matt dunn** » Sun May 09, 2010 6:04 pm

it would depend on the quality of the std pistons.

Factory toyota GZE pistons are very good.

by **iOnic** » Sun May 09, 2010 6:24 pm

Forged pistons give you a bigger margin for error. If you're running right at the limit of what is safe for your engine, even something as simple as a slightly bad batch of fuel could introduce fatal detonation.

OMG so shiny! · by **Dell'Orto** » Sun May 09, 2010 7:18 pm

Plus there is only so much a standard cast piston can take...though its usually quite a bit of HP.

by **Adoom** » Sun May 09, 2010 11:07 pm

matt dunn wrote:it would depend on the quality of the std pistons.

Factory toyota GZE pistons are very good.

Doesn't the 4agze have forged pistons standard anyway?

by **Adoom** » Sun May 09, 2010 11:08 pm

Dell'Orto wrote:Plus there is only so much a standard cast piston can take...though its usually quite a bit of HP.

Oh, thats okay then. I've been using Kw, no HP here! :lol:

OMG so shiny! · by **Dell'Orto** » Sun May 09, 2010 11:35 pm

Oh no thats worse, takes way less kw than hp to break them

by **~SlideWays~** » Mon May 10, 2010 9:46 am

Get a 4age.

As far as I know SR20DET's and 4G63's aren't forged and with a good tune they all seem ok with 200kw's.

Does the CA18DET have oil squirters?

by **iOnic** » Mon May 10, 2010 9:56 am

CA18DET will make 200wkw on the stock internals with no drama. Silvia/Pulsar T28 with supporting mods will see you close to that. They're pretty beefy little engines. No need for water injection at that level unless it's being tuned by a muppet.

Yep CA18 has oil squirters and a crank girdle...and is built like a brick shithouse.

by **Adoom** » Mon May 10, 2010 1:44 pm

iOnic wrote:CA18DET will make 200wkw on the stock internals with no drama. Silvia/Pulsar T28 with supporting mods will see you close to that. They're pretty beefy little engines. No need for water injection at that level unless it's being tuned by a muppet.

Yep CA18 has oil squirters and a crank girdle...and is built like a brick shithouse.

Oil squirters = CHECK
Crank Girdle = NOPE
Early FWD CA18DET do not have the girdle. I have one of those.... But I have a girdle from another RWD CA18DET I had years ago, I should have kept the rest of it too.

by **iOnic** » Mon May 10, 2010 2:25 pm

What is your CA out of? My old CA18DET in an 88 RNU12 Bluebird had a crank girdle and I'm pretty sure they're one of the first CA18DET's?

by **Adoom** » Mon May 10, 2010 5:57 pm

iOnic wrote:What is your CA out of? My old CA18DET in an 88 RNU12 Bluebird had a crank girdle and I'm pretty sure they're one of the first CA18DET's?

Not sure. I got it from an engine importers off trademe.
I think I read in a forum that some of the U11 Bluebirds had them.
Mine has a crossover inlet manifold rather than a reversed....$&#$% it.
It look like this http://carphotos.cardomain.com/ride_images/3/190/1301/25473150006_large.jpg

by **iOnic** » Mon May 10, 2010 6:01 pm

Aah ok. Mine had a side fed intake mani...Is that yours in the picture? looks bloody clean

http://img.photobucket.com/albums/v665/ ... 0012-2.jpg

by **~SlideWays~** » Tue May 11, 2010 10:14 am

Adoom with a 'clean' car :lol:

*dies*

by **Adoom** » Tue May 11, 2010 11:07 am

iOnic wrote:Aah ok. Mine had a side fed intake mani...Is that yours in the picture? looks bloody clean

http://img.photobucket.com/albums/v665/ ... 0012-2.jpg

Nah, its just a random picture I found. Mine is filthy.

by **4agtepwr** » Tue May 11, 2010 11:46 am

Id buy a link and pay for a decent tune way before I brought forged pistons,
Det will break a land on a forged piston as well as a cast one, it will just stand up to a shit tune a little longer, have seen over 500hp on standard sr20 pistons and ca one's will be fine. Buy a g4, get a decent tune and it will last way longer than a well built, but badly tuned forged motor

by **Heylin** » Tue May 11, 2010 1:13 pm

Id buy a link and pay for a decent tune way before I brought forged pistons,
Det will break a land on a forged piston as well as a cast one, it will just stand up to a sh*t tune a little longer, have seen over 500hp on standard sr20 pistons and ca one's will be fine. Buy a g4, get a decent tune and it will last way longer than a well built, but badly tuned forged motor

Thats exactly what ive done, $220 for a full set of cast pistons and rings (NPR\Teikin) Brand.

Aiming for a safe tune and 200-220 RWKW

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Are forged pistons REALLY worth it?

Are forged pistons REALLY worth it?

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