Twin Turbo EG33 Build - cozykat - Page 4

YourConfused · #46 05-12-2009, 09:48 PM

I thought the pics would be smaller, sorry

longassname · #47 05-13-2009, 08:00 AM

Ya the bores on those are probably too big for the oe head gaskets. Head gasket clearance is starting to get tight on my high compression pistons which have a 97.4mm bore. I don't think I'd go any bigger or even that big with low compression pistons. Increasing bore increases compression.

You also might want to double check your compression height; it looks like it is getting a little low.

longassname · #48 05-13-2009, 08:19 AM

Ok, you posted the spec sheet while I was typing my last post. That compression height is fine. I think the actual compression is higher than calculated though.

The bores on those are too big not too small. You have the wrong number for the stock bore. The stock bore is 96.9mm=3.8150 You're off by 40 thousandths.

If you go to 97.0 you'll be able to just hone the block. 3 thousandths aught to be enough to get the bores round. If you go any bigger with your bores you have to bore and hone which is kind of throwing money out the window.

You also don't have clearance to maintain zero interference operation with performance camshafts if she is getting any.

svxash · #49 05-13-2009, 08:40 AM

WOW those are nice looking pistons!!! Almost a shame you won't be able to see them once installed.

longassname · #50 05-13-2009, 08:59 AM

98mm? These pistons are spec'ed for a 3.858 bore which is 98mm.

I looked back and saw further down in her price list that she has cometic head gaskets listed. They have a larger bore so you should be able to use these pistons. You'll have to bore and hone and rechamfer the cylinder liners as you are taking quite a bit off of them.

I believe the cometic head gaskets also have a higher compressed height than oe head gaskets so although the squish area will be kind of tall the compression ratio should come down to the 9.0 that was specified. It looks to me like they correctly made what was ordered.

YourConfused · #51 05-13-2009, 09:46 AM

Quote:

Originally Posted by longassname

98mm? These pistons are spec'ed for a 3.858 bore which is 98mm.

I looked back and saw further down in her price list that she has cometic head gaskets listed. They have a larger bore so you should be able to use these pistons. You'll have to bore and hone and rechamfer the cylinder liners as you are taking quite a bit off of them.

I believe the cometic head gaskets also have a higher compressed height than oe head gaskets so although the squish area will be kind of tall the compression ratio should come down to the 9.0 that was specified. It looks to me like they correctly made what was ordered.

I was tired and thinking stock was 3.858" when I posted last night.

It's been so long since I ordered these that I forgot the specs.

STeeL25T · #52 05-14-2009, 12:25 PM

Are you keeping the stock cam specs?

YourConfused · #53 05-17-2009, 02:43 PM

Quote:

Originally Posted by STeeL25T

Are you keeping the stock cam specs?

no
I am not sure she has decided what she wants for head work as what I proposed is a little too pricey. We are both a little too busy ar this moment to make any decisions either way, but at least any direction she goes won't require 2 months to get parts made like the CP pistons did.

Johnybeas · #54 05-18-2009, 11:12 PM

wow 2 months for the pistons??

YourConfused · #55 05-18-2009, 11:17 PM

Quote:

Originally Posted by Johnybeas

wow 2 months for the pistons??

yeah, seems when I called to cancel the order they were magically ready a few days later. lol In reality it took a little more than 2 months, but whatever.
I should have called to cancel sooner I guess.

they are, with all the other parts for the short block, at the machine shop now.

STeeL25T · #56 05-29-2009, 09:45 AM

Going over you parts list and stealing things from it and had some questions:

Where are you getting the Cometic head gaskets for 190 a set? The price I wrote down was 137.74 a peice, if your getting them cheaper someplace I'd love to know where =)

And forgive me for asking this again, I'm assuming its a stupid question... What part numbers are you using for the ARP bolts?

So far my list is coming up a bit under 3000 bucks... without bearings...or a trans...or a turbo...or engine managment lol

SilverSpear · #57 05-29-2009, 10:28 AM

$190 a set? That is not possible I guess.

A supplier quoted me $131 a piece.

cozykat · #58 06-02-2009, 10:15 AM

Quote:

Originally Posted by STeeL25T

Going over you parts list and stealing things from it and had some questions:

Where are you getting the Cometic head gaskets for 190 a set? The price I wrote down was 137.74 a peice, if your getting them cheaper someplace I'd love to know where =)

And forgive me for asking this again, I'm assuming its a stupid question... What part numbers are you using for the ARP bolts?

So far my list is coming up a bit under 3000 bucks... without bearings...or a trans...or a turbo...or engine managment lol

The 190/set price was because back in April, there site said $88 and Tom bough them for that price. It has since jumped up to $137/each. I intended on buying them then but was distracted with school and will now have to pay that higher price as well. :/
I will get my ARP receipt and pull the numbers for you this evening.

longassname · #59 06-02-2009, 10:51 AM

You will find the 4 short studs for the front will need about .01" ground off of the nose. Assuming you don't have a coolant fed grinder at home you may want to go ahead and take them somewhere to get them done ahead of time.

STeeL25T · #60 06-02-2009, 01:55 PM

Thats bad news for all of us. Wonder what happened to make their price go up nearly 50 bucks?