Attn 2TG Guru's info on 88262 head wanted. *now with pics*

[Turdinator]

Some interesting observations. The 262 head almost looks like its been redesigned to be lighter. It would be interesting to have a 261 and a 262 head weighed for comparison. In actual driving terms though it will make two fifths of fuck all difference. But interesting non the less.

[hks7mgt]

who knows anything about squish zones? Would the new design been developemnt to resolve issues with poor squish zones, maybe?

[TheToyman75]

who knows anything about squish zones? Would the new design been developemnt to resolve issues with poor squish zones, maybe?

My personal thoughts on this are that the chamber redesign is for exactly that, Improved squish area and burn efficiency to make for a more emissions friendly result. As the last of the 2TG's they had a more stringent emissions requirement than the earlier heads.

Its not about more power, but less emissions. (they had less power)

[The Green Terror]

Hey guys, this has been a most educating thread.

I am getting ready to take The Green Terror down the 2t-geu path and courtesy of Invid pointing me at this thread and the info already here, I now know that I have a "262" head (and the cams are stamped 262 as well).

My question to the Guru's (and I have it on VERY good authority that Toyman75 is a god with these) is what reccomendation would you make in regards to replacing the pistons (brand, etc)?

Some back ground: This rebuild is not to make big numbers on a dyno, nor is it for a race car. TGT is my daily driver, as it has been for the last 17 years. The 2T I have in it goes well but is starting to get a little tired, has a few niggly problems and after it did a head gasket a few months ago (not to mention the constant crap slung at me from my fellow CCG members for only having ONE cam...love you guys) I decided that I would stay with the awesome T series but take that step up. I'll be running the stock computer for a while as I am doing this on shoe string budget. The head has had a full service at Phillip Head Service and has new valves (inlet & exhaust) and new genuine valve guides. Block is next and will determine the size/bore of the pistons. Will remain N/A despite the nagging from Invid. I (think) I understand that so called "standard" pistons are not useable with a "262" head but I have no idea (about so many things) which pistons can be used.

Please help...I am a total automotive gumby but I try hard

[hks7mgt]

errr, the only way i understand you'll be able to get replacement pistons, is to give one of your pistons to a piston manufacturer to have ones made to the same specification. Otherwise, ditch your head and use another head with the more common design pistons. What is wrong with the pistons you have in there?

When i had mine rebuilt, they simply just replaced the piston rings and all the neccessary bits for a full rebuild using the standard crank and pistons and it runs sweet. Unless your pistons are shot, use them.

[poida]

I could not find replacement 2TG pistons in Australia, unless you want them custom built but these were quoted at over $1000.

There are a few options for aftermarket pistons. Most I've seen are for the 1750cc upgrade or the 2000cc upgrade which uses the 3T crankshaft.

http://www.kameariusa.com/2TG_Piston.php

2TG 1750cc Piston
Manufacturing Method Forged
Type High Comp
Bore 88.5, 89
Pin Diameter x Length 22 x 60mm
Pin Height 39mm
Piston Ring Thickness 1.5 x 1.5 x 2.8mm
Rod Type 2TG, 3TG Rods
Crankshaft 2TG

(Includes Piston Ring, Pin, Snap Ring)

PRICE: $980

2TG 2000cc Piston
Manufacturing Method Forged
Type High Comp
Bore 88.5, 89
Pin Diameter x Length 22 x 60mm
Pin Height 35mm
Piston Ring Thickness 1.5 x 1.5 x 2.8mm
Rod Type 2TG, 3TG Rods
Crankshaft 3TG, 3T, 13T

(Includes Piston Ring, Pin, Snap Ring)


These pistons are exclusively for the hemi-spherical combustion chamber. This cannot be used for the laser head type.

PRICE: $980

(Add $145 for Titanium coated SPL piston rings)

You will find more info by searching for the 2t/3t hybrid.

[The Green Terror]

Thanks Poida, I had seen them but was hoping I could stick with a 1600cc capacity. Looks like I may not have an option.

Hks7mgt, yeah having spent the dosh on getting the head done with new valves and guides, ditching it is not really an option. At last look a couple of the pistons were not as great as they could be. Wish I had found this thread beforehand.

Either way it has taught me things I didn't know.

Cheers,
Matt

[poida]

Also, not sure if you planning to put the 2tg head on the 2t, if so you will need things like the 2tg timing cover and dummy cam. Not sure what else but its more than just the head. Heaps of info on the net about this.

[The Green Terror]

Also, not sure if you planning to put the 2tg head on the 2t, if so you will need things like the 2tg timing cover and dummy cam. Not sure what else but its more than just the head. Heaps of info on the net about this.

Sorry mate, should have said, I have a block plus all the injection gear + ecu & loom, fairly much a complete engine, just in need of money and work. Beginning to think it was a bad idea and should have lashed out on the injection gear for the 2T.

http://www.efihardware.com/products/...onomy-kit-DCOE

I reckon this would be a whole lot cheaper, even doing all the rewiring.

[TheToyman75]

Matt,

If your planning to stay at 1600cc Capacity then just use your stock 262 pistons with some new rings if you can. I have a few 262 pistons kicking around so may have some decent ones there if you get stuck.

If you do need new pistons then your mad not to fit a 3T crank while its all apart.

For a budget NA built a 3T crank and some oversize stock 3T pistons work a treat but you will have to get your engine builder to check the head to piston clearances with the 262 head.

[hks7mgt]

but you will have to get your engine builder to check the head to piston clearances with the 262 head.

Hey Rod, who would you use to reproduce new '3t' pistons to suit the 262 'offset' chamber design head? I'm sure there is some one out there...

[The Green Terror]

I have heard (but am yet to confirm) that wiseco will fly cut the pistons custom. I'll see what I can dig up and report back.

I'll see if I can dig up a 3T crank from somewhere. Thanks for the suggestion.

[Rodger]

It would be worth talking to Special Piston Services in Melbourne (03) 97931110 http://www.specialpistonservices.com/. They would be able to make suitable pistons.

Send down a stock 2T-G one and a 3T example and they can work it out. May well have done it before.

Regards

Rodger

["Z" UTE]

Steve Millar had a set of 3T pistons milled to the correct dimensions for the GEX 262 head. The guy fabricated a piston holder to mount in his milling machine. Steve has that piston holder in his garage, so if you get stuck the pistons can be machined.

cheers Chuck.

[brucey]

Hey Marcus, what kind of pistons did you end up finding when you took the 88262 head off your 3tg hybrid engine?