AJC13B

After a bit of thought, I decided to take the turbo off and get the exhaust side of things made a bit smaller.

Turns out all of the tips off the exhaust wheel were missing. Fred said it must have run lean and broken the tips off. I told him what happened after Summernats when I lost the seals out the exhaust, thats when it must have happened! Over a year ago!! So the car ran an 11.1 @ 125 and made 500rwhp on a turbo that was cactus! I was pretty mad but happy at the same time! Fred also told me that the turbo was quite oorly put togehter. The backing plate was incorrect making the gap between the rear of the blade and the backing plate was quite large and would have been causing undue turbulence. The shaft was also 10 thou undersize as well as the bearing seals not being 100%.

Anyway, long story short, the turbo is practically brand new and is back on the car and the difference is remarkable! The car spools up 500rpm quicker, but builds more boost up to that point and pulls alot harder through the midrange! The top end has also improved immensely! Previously, the car felt a little flat above 7000rpm, I guess we know why now! The car will be back on the track shortly, in both street and strip guise! In street trim, I am hoping for mid 11s @ 120mph+ and in strip form mid 10s @ 132mph+.

Previous specs of the turbo were:
68mm front wheel
0.84 housing
73mm exhaust blade
1.22 exhaust housing

I now have:
68mm front wheel
0.84 housing
68mm exhaust blade
1.05 exhaust housing

Click on the pics for the larger versions.

RETed

Is that a Q-trim or an R-trim turbine wheel?


-Ted

AJC13B

The Garrett TA45 turbos don't have 'trims' associated with them, its just the size. So its just a 68mm blade to suit a 1.05 rear housing

RETed

Nah, they are supposed to.&nbsp The "TA45" series is supposed to be a T04 hot side mated with a "T05" compressor side.&nbsp I believe the turbine housing flange has the same bolt pattern as a T04 turbine flange?&nbsp If so, then the nomenclature still should apply.

Now...Garret doesn't even recognize S-trim, V-trim, H-trim, T6x, T7x - this is something the aftermarket turbo shops have applied to keep track of everything.&nbsp Garrett part numbers are a BITCH to remember!&nbsp Go ask a Garrett rep about a "60-1", and he's going to give you a very puzzled look.

(I was looking to run a TA45 at one time.)



-Ted

Max7

Well now that pretty much everything has been replaced/rebuilt/reworked,
the only thing that you might need to replace now is tires
Can't wait to see the new numbers!

AJC13B

The TA series of turbos has little if anything to do with the T04 series. The blade designs are all different as are the sizes mentioned. A T04 1.32 housing is equivalant to a 1.22 housing, which is what I had previously.

There are 2 types of flanges available for the TA45, the one I have is not compatible with a T04 style flange, otherwise my turbo might have had a .96 rear housing

All up, apparently, there are over 300 variants of TA45 based turbos. There are 2, that I know of, different style snouts available. The one I have is available with a 72mm or 76mm blade. Then there is a 'surge slotted' snout as shown in this picture here. This one is available with 72mm or 76mm blades. Then there are 0.96, 1.05, 1.22 and 1.52 exhaust housing sizes available and a whole bunch of blades sizes to go along with them.

I got this info direct from Garrett in Sydney by the way