Jump to content
SAU Community

Recommended Posts

depends what spec mate, post the full details of each your looking at.

Considering the GT42 can be ordered with any range of wheels and housings (as i bet a t66 can also) then its virtually a case of how long is the piece of string in this case as the question is too general

Link to comment
https://www.sau.com.au/forums/topic/103270-t66-or-gt42/#findComment-1898209
Share on other sites

The T66 is only rated at 700hp whereas the GT42R is rated at 800+...

T66 = old crap GT42R = new + improved design and twin ball bearing cartridge.

Also beware of cheap Chinese copies as many of these are circulating Ebay at the moment and are very very poor quality.

EDIT-R31Nismoid-you are not a trader, nor is FI a for sale section

Link to comment
https://www.sau.com.au/forums/topic/103270-t66-or-gt42/#findComment-1898982
Share on other sites

JVC the GT42/GT42R use either

94mm 56T (70.3mm inducer) compressor , max flow ~84lbs at ~ 22lbs boost

102mm 53T compressor , max flow ~ 95lbs at ~ 33lbs boost .

Compressor type for both is BCI-18 or GT series .

Turbine for both is 82mm 84T UHP or GT series .

The once Garrett T66 , rights were sold to Turbonetics , is

91mm 52T (65.5mm inducer) with max flow ~70lbs at ~ 25lbs boost .

I think these normally use TO4P trim (74mm 76T) turbines .

Garretts answer to the T66 was I think the TO4R compressor which is 84mm 63T and good for ~ 75lbs flow at ~ 26lbs boost .

The TO4R is said to be better spooling (lower boost threshold) than any of the above and judging by its major diametre and trim size it seems logical . The fact that its compact enough to fit in a TO4S compressor cover is a bonus . It is used in HKS's (rebadged Garrett) TO4R and TO4Z with TO4 P trim turbines and in bush bearing form just about any turbine practical ie T350 (75.5mm 70 or 76T) , TO4 O (74mm 69T) , TO4 P , TO4 GTQ (79mm 70T) , TO4 GTS (81.3mm 85T) and probably 82mm UHP turbine from the GT42 .

The Americans really like this TO4R compressor up to about 750-780 Hp as its efficient at low and high pressure ratios and not prone to surge . If you go searching for it they sometimes call it the GT67 wheel - they like to call compressors by their inducer diametre (66.7 = 67) for some strange reason .

There are some ball bearing alternatives to the TO4Z using it ie GT3567R and GT4067R which obviously use GT35 or GT40 BB UHP turbines in their native turbine housings .

Cheers A .

Link to comment
https://www.sau.com.au/forums/topic/103270-t66-or-gt42/#findComment-1901018
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Latest Posts

    • For these last 7 years of ownership, I've always had to use a small scissor jack under one of the front tow hooks to raise the front just enough so my low-profile jack fits under to reach my subframe jack point. I'm beginning to get annoyed of always having to do this. Are there any lower low-profile jacks that fit under the gtr lip on a dropped car?
    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
×
×
  • Create New...