CA18ET pistons fit CA18DET?

Post by **AWDB12wagon** » Mon May 28, 2007 8:34 am

Anyone know?~Ryanhttp://www.importperformancepa....html

Post by **r34 gtr** » Mon May 28, 2007 9:40 am

i uh, probably wouldnt reccomend it. why do you need pistons?

Post by **AWDB12wagon** » Mon May 28, 2007 9:48 am

r34 gtr wrote:i uh, probably wouldnt reccomend it. why do you need pistons?

I'm guessing pistons made contact with valves in my motor I just bought...why wouldn't you recomend it?

Post by **r34 gtr** » Mon May 28, 2007 9:55 am

im going to go ahead and guess the pistons from the ca18et suck some serious hairy balls. correct me if i am wrong. they will go in fine i assume, being the same engine size and everything, but being an older design they probably arent up to the task of det duty. i would definitely go with some det pistons. they shouldnt be hard to get a hold of, as i know there are several people on here who have extra sets.

Post by **AWDB12wagon** » Mon May 28, 2007 10:08 am

Okay....if you would've clicked the link you'd have seen that they are forged pistons...my question was simply if the dementions of the ET are the same as the DET...like wrist pin location and rings and such.

Post by **ca18det240hatch** » Mon May 28, 2007 3:28 pm

i know the rings for a ca18de will fit a det......

im assuming its all the same

if you need a set of stock ca18det pistons, let me know. I have some that are in good shape.

Post by **RS12Turbo** » Mon May 28, 2007 3:58 pm

I think the wrist pins are different between the et and det.......but not 100% sure.Call and ask the guy at IPP from the website you have listed.....I can't remember his name, but he was very familiar with both the et and det motors. On a different note.........why not just get some det pistons? IPP carries them........or they did

Post by **Masterdebater** » Tue May 29, 2007 2:21 pm

i dont think anyone is railing u for questioning et pistons over det ones its just the fact of, why? det pistons were made for the det and are just as easy to get. arents single cam pistons higher compression than dual cam pistons?

Post by **r34 gtr** » Wed May 30, 2007 8:54 am

I'm not a link-clicking kind of guy. and i wasnt trying to be a douche, i was just wondering why you are going out of your way to get et pistons when i know for a fact at least three members on here have sets they would like to get rid of. waaay cheaper than some new et pistons.

Post by **AWDB12wagon** » Wed May 30, 2007 9:13 am

The ones listed are forgies, I just thought I'd upgrade? I'm sure the pistons are fine even if they did hit valves, but you know, while I'm in there...

Post by **r34 gtr** » Wed May 30, 2007 12:55 pm

ok finally i click the link and it makes sense. i dont see why they wont fit, but doesnt weisco make forged slugs for the det?

Post by **AWDB12wagon** » Wed May 30, 2007 5:41 pm

r34 gtr wrote:ok finally i click the link and it makes sense. i dont see why they wont fit, but doesnt weisco make forged slugs for the det?

I e-mailed them and got the responce "they're listed under pistions, and the rods are listed under pauter". they suck ad e-mails. I was asking about a custom CR of 9.5:1, and rods.

Post by **float_6969** » Wed May 30, 2007 6:03 pm

My concern would be about valve reliefs. The ET is a SOHC and the DET is a DOHC (duh). I would think that the valve reliefs needed for a DOHC head would be lacking in a SOHC piston.

Just a guess on my part...

Post by **AWDB12wagon** » Wed May 30, 2007 8:50 pm

float_6969 wrote:My concern would be about valve reliefs. The ET is a SOHC and the DET is a DOHC (duh). I would think that the valve reliefs needed for a DOHC head would be lacking in a SOHC piston.

Just a guess on my part...

The weisco pistons on http://www.importperformanceparts.net have an 8.2:1 CR, so they probably have a bigger dish in them. What is the stock CR on the DET?

Post by **davidricardo86** » Wed May 30, 2007 9:05 pm

AWDB12wagon wrote:
The weisco pistons on http://www.importperformanceparts.net have an 8.2:1 CR, so they probably have a bigger dish in them. What is the stock CR on the DET?

8.5:1

Post by **AWDB12wagon** » Thu May 31, 2007 6:25 am

I called IPP and they said the highest CR they can make for the CA18DET is 8.2:1 , and it would need to be domed if I wanted a higher CR, does this sound right?

Post by **r34 gtr** » Thu May 31, 2007 6:44 am

not really. i dont think cp's are domed or anything, and they are 8.5:1. it might have something to do with the way weisco makes them but who knows. may i ask why you are just looking at weisco pistons? mahle, arias, je, and cp all make great pistons and i think they all have off the shelf apps for the ca18.

Post by **float_6969** » Thu May 31, 2007 5:10 pm

You have to remember that the combustion chambers are shaped differently in the ET vs the DET. There is much more to compression ratio than just piston shape.

IDK about the ET but the DET uses a flat top piston w/4 valve reliefs to achieve it's stock 8.5:1 CR.

Post by **AWDB12wagon** » Thu May 31, 2007 7:18 pm

float_6969 wrote:You have to remember that the combustion chambers are shaped differently in the ET vs the DET. There is much more to compression ratio than just piston shape.

IDK about the ET but the DET uses a flat top piston w/4 valve reliefs to achieve it's stock 8.5:1 CR.

So are you using the CP 8.5:1 pistons Ryan? For $400 that isn't bad.

Post by **davidricardo86** » Thu May 31, 2007 7:41 pm

AWDB12wagon wrote:
So are you using the CP 8.5:1 pistons Ryan? For $400 that isn't bad.

Here are my pistons! I opted to go with the CPs too. I hear a lot of good and that makes me happy!

Here are some shots of my head.

Does anyone have shots of the ET's combustion chamber and Pistons?

Post by **AWDB12wagon** » Thu May 31, 2007 9:02 pm

Nissan p0rn FTW!! Nice shots, I wish I had a motor that clean! Mine's gonna need some lovin...bent valves and such. What CR are your pistons David?

Post by **themadscientist** » Thu May 31, 2007 10:01 pm

Daym that is one clean head.

Post by **rexhunta** » Fri Jun 01, 2007 2:53 pm

nice pink nail polish your running there

Post by **davidricardo86** » Fri Jun 01, 2007 3:18 pm

AWDB12wagon wrote:Nissan p0rn FTW!! Nice shots, I wish I had a motor that clean! Mine's gonna need some lovin...bent valves and such. What CR are your pistons David?

This was back when i had just gotten my head back from my machinist! Its still clean but you cant see under all that manifold stuff like rubber hoses, and harness. The CPs im using are 8.5:1 and stock bore of 83mm. I didnt want to go messing around with the static compression ratio as i dont have the money for a stand alone computer as this would be one of the best ways to take advantage of altering such things. That and im not the most experienced car guy so i left it "stock" for now.

The pink nail polish was the EX's! Thats a whole other subject id rather not get into! Can you say "crazy ex-girlfriend?!"

Post by **float_6969** » Fri Jun 01, 2007 7:24 pm

AWDB12wagon wrote:So are you using the CP 8.5:1 pistons Ryan? For $400 that isn't bad.

They're CP pistons, but they're not 8.5:1 and they weren't $400....

Post by **AWDB12wagon** » Sun Jun 03, 2007 7:31 am

float_6969 wrote:They're CP pistons, but they're not 8.5:1 and they weren't $400....

So, com'on, spill the beans, waht CR and bore are they?

Post by **sideways danny** » Sat Jul 14, 2007 4:02 pm

just to clear this up, ET wrist pins are 19mm, DET are 21mm

the ET runs 8:1 standard but the main difference is in the head design, there are big valve reliefs in the ET pistons, bigger than the DET ones, and due to the configuration of the head there are 4 cut outs on each piston

Post by **AWDB12wagon** » Mon Jul 16, 2007 10:56 am

sideways danny wrote:just to clear this up, ET wrist pins are 19mm, DET are 21mm

the ET runs 8:1 standard but the main difference is in the head design, there are big valve reliefs in the ET pistons, bigger than the DET ones, and due to the configuration of the head there are 4 cut outs on each piston

Cool, thanks for the info! I'd love to find a place that actually knew what they were talking about and could get me the correct CR pistions, I'm thinking 9:1 now.

Post by **sideways danny** » Wed Jul 18, 2007 4:47 pm

well a straigh 1mm oversize will give 8.66:1 and skimming the head will give you a bit more (calculations needed)

personally I run 8.17:1 and it's got plenty of response

CA18ET pistons fit CA18DET?

CA18ET pistons fit CA18DET?

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