so whos got a ca18de piston lying around?

[Liquid_Neon]

Title says it...

I haven't taken mine apart yet and i want to know if ca18de pistons have some sort or recess for the squirters. thats all, thx!

[themadscientist]

I do, I think. I'll see if I still have the pistons from Damien. If they dont have a recess you could always cut it out though. I would be more concerned with the busy dome with all those sharp edges to inspire uncotrolled combustion under boost though.

[Liquid_Neon]

until the bottom end went, which I highly doubt was related to boost as my ca18de had been thrashed long before it saw a turbo, I never had any detonation problems at 6psi. Ran quite well actually, very strong.

So yeah, if u find you still got 'em, either snap a pic or lemme know! thx TMS!

[themadscientist]

6 psi is hardly boost, DETs run over 10 stock. Unfortunately I can tell you what sustained detonation does So have you not seen the crown of DE piston? Do you want a pic if I still have one?

[Liquid_Neon]

CA18DET's don't go over 10psi.. mine never did? I'm using the stock actuators on an SR20 T25.

I plan on getting a prom tune and running 10psi.

A picture would be lovely

[themadscientist]

.7 bar is stock. When I put the S14 turbo on it dropped to .3; I never figured out why. I had to crank it back up with a VBC.

[themadscientist]

sorry guy, no notch.

as you can see the dome is crazy

[float_6969]

You're a wussie Mike. Custom CP Pistons. 10:1 compression, bored .5mm over.

USDM CA18DE Pistons don't have the notch for the oil squirter. What I did was send CP a DE piston and then told them to use the dome from the DE on the DET pistons specs they already have in their system.

Stock CA T25 runs .7 Bar or 10psi. Stock SR T25 runs .5 Bar or 7psi. Stock SR T28 runs .3 Bar or 5psi.

At least this is what they ran on my CA.

I haven't done a write up yet, but I just converted to E85 (85% Ethanol) Now able to run 17° Total timing under 15psi boost on the CA T25. Was running about 5° total timing under same conditions. I'm pretty sure I've now cleared 200RWHP.

[themadscientist]

soon enough your uppance will come!

[Liquid_Neon]

Ill! I should have it apart sum time soon. I'll dremel out the hole or something.Now alls i have to do is get my taxes done and I should have most of the money to finish my car, id like to see it almost done within 2 months.

Hi comp is fun

[float_6969]

Yes it is. It's much easier to run on 105 octane as well.

[boost_boy]

You're a wussie Mike. Custom CP Pistons. 10:1 compression, bored .5mm over.

USDM CA18DE Pistons don't have the notch for the oil squirter. What I did was send CP a DE piston and then told them to use the dome from the DE on the DET pistons specs they already have in their system.

Stock CA T25 runs .7 Bar or 10psi. Stock SR T25 runs .5 Bar or 7psi. Stock SR T28 runs .3 Bar or 5psi.

At least this is what they ran on my CA.

I haven't done a write up yet, but I just converted to E85 (85% Ethanol) Now able to run 17° Total timing under 15psi boost on the CA T25. Was running about 5° total timing under same conditions. I'm pretty sure I've now cleared 200RWHP.

Funny, I run no retard before 17psi and my timing is alot more aggressive on 93 octane. Now I am well aware of the CR you're running, but with this engine one has to wonder if the higher comp. ratio is worth the minimal gains. The trickery involved with tuning this type of set-up can not be done and be totally effective on a standard CA18DET ecu. It will require a standalone engine management or some type of engine management system that allows a user to adjust the timing curve throughout the entire rpm range.

I just see the higher compression ratio help spool turbos a bit faster and moddest increase in low end torque figures, but my hypothesis is if one is not willing to spend the bucks on a competent engine management system, one should not be screwing with high compression and boost. "Keep it low and you'll rarely blow" .

Dee

[themadscientist]

I plan on going low, like 8.0-8.5:1 and making the power on boost. I will be letting the car loose on the highway though, long periods at WOT, not a responsive circuit engine. I picture the other car edging away then suddenly my power ramping up exponentially as the boost comes in. Response sucks when it screams to the boost set and then lays down.