1GGTE+Blitz CT12 turbos+1JZ CT12A guts = 250rwkw??

**BLK1g-gte** · 27-01-2009, 07:50 PM

Hi Boys and Gals

Haven't posted for a while...well i get right to the point. As some might or might not know i have been messing about with my 1GGTE for a while now. Current specs are refreshed 1GGTE, Custom Waggot Cams, Forcefed Custom Cam Gears, The Real Road Runners Custom Dump pipes, Blitz Bag Turbos, Std Computer, Std Injectors, Apexi Neo and Apexi SITC, Blitz DSBC and offcourse the cooler and fool exhaust. So far with the above i have managed to get the car to 180rwkw with and autotrans.

Now for the question... The Blitz Bag Turbos are actually high flowed CT12 gen 3 turbos. I have had one of them pulled apart as they have failed and they use a bigger housing and a CT12C wheel from what i have been told. Now since they have failed its going to cost bucket load to repair...

I have been given an option to fit 1JZ CT12A Steel wheels guts in my turbines and this will fit due to the bigger housing that the Blitz turbos have with some minor machining. Now this will cost about a 1k more then rebuilt bringing the grand total to $2500.

I will be fitting a Microtech lt10 to get rid of the restrictive AFM and to have full control over the 7M 440cc injectors and the whole engine management.

The question is Does anyone see the above as beneficial upgrade and do we see any other restrictions in the stock 1GGTE piping running to the turbos then to intercooler piping and throttlebody.
I am using all the stock top piping and metal 2 inch piping to the HKS cooler.

Would the throttle body be a restriction and these power levels?
What are you opinions about the work being done on the Turbos?
Would any other thing i cant for see be a restriction?

Single is out of a question as i have spent enuf money on dump pipes and other bits and pieces that it would work out to cost more then $3000 to convert when I count my loses.

Power level that i am chasing is 250rwkw + or About 400hp at the fly and high 12's in a 1500kg car.

I am aware that 1JZ would have been a smart and much better option both in torque and power but too late now as too much money and 3 years has been poured into this....any good advice would be greatly appreciated.

Sorry if i was to detailed and for the epic size of this post just after some solid advice.

Thank you

**Kedderz** · 27-01-2009, 07:59 PM

I would go a big single Ball bearing turbo if it were me, 1jz turbos will lag to hell and back on a 2 litre.
At that power level the head is a restriction not the manifold, head flows 180cfm and the head is 240cfm.
To give you an idea, microtech+440cc injectors + gt28rs turbo .64 rear housing = 240rwkw on 16psi which is in another members car.
Stock piping will be a huge restriction especially the dump pipes.
Also you need to make a decision on TVIS or not as well

**BLK1g-gte** · 27-01-2009, 10:44 PM

I do completly agree with u to a point. I know the new age ball bearing turbo it will cost me the same in the end....I need a manifold and all new piping. As well as that i am not using stock dump pipes i am using custom ones sourced of Road Runner.... i am just worried about the two top pipes that have the stickers Toyota and the other where it says twin turbo. The one that connect to the inlet of turbo's and the other that connects to the throttle body and manifold. The turbos will be fitted with ball bearings but i am not 100 percent on that just as yet.. This is more of a hybrid turbo not a 1jz turbo. Just the guts may be CT12A in the Blitz CT12 housing or similar...we are still in the stages of finding what will fit best and work best so i am open to ideas. The TVIS i am keeping unless it proves to be a restriction. It will be controlled with the Microtech and i will put two 4mm bolds in cyld 1 and 6 to even out the flow....I have been doing my homework and i really want to get as much out of the stock top pipe work (altho i will change this if its a problem), cast turbo manifold and throttle body as i can...I know what i am doing is kinda stuborn and stupid when there is a better way but i really would like to see if this is possible and would like peoples input...I thought the head flows no probs to 250rwkw and more...the only weak point is the valve springs. That has been proven a few times... altho a thre angle valve job will help i am going i have the cams to make up for some of that...and yes the manifold does outflow the head....thx for the input

**Kedderz** · 27-01-2009, 10:51 PM

sounds like you have made up your mind mate, theres a few of us doing 1g "builds" atm and all of us have done homework like you have and decided on a ball bearing, modern single turbo.

We also have the same power figures in mind.

**BLK1g-gte** · 27-01-2009, 11:25 PM

Very true most people want about that out of 1G cause its still reliable...how much are the single conversing costing u fellas including manifold new dump and lines and fitting the lot...Can u give me rough figure

**SillyCarS** · 28-01-2009, 12:07 AM

1. sell dumps on here or supra forums $400

2. fit y pipe + kkr 380 and run 18psi ($800) (depending on how agressive your cams are this "should" achieve your aim

3. get new hot side cooler pipe and zorst ($400)

4. profit? $2500 -$400 -$800 + $400 = $1800

there's a million variables but to me a cheap y-pipe and newer big single will do what you want. but in the end its just a printout from a dyno, what about response, torque and application

like kedderz said there's at least 6 of us that come to mind who are building these things. check out: screaminrolla's, ino5nt, kedderz, mine (if you have access), stradlaters old setup, emp's old car etc etc etc

**VasH** · 28-01-2009, 01:34 AM

Im aiming for about the same power figure, I spoke to 6boost a while back he recommended getting a GT2870R - $1600 and one of his single manifolds - $1200 and should easily make around 200rwkw in a stock setup, with the work you have done 250 should be achievable

No doubt you will pay a bit more, but it will be easier to work on if something goes wrong also the potential to go to a bigger turbo later. Plus you might save some weight in the front the stock setup weighs a bit

**Z2TT** · 28-01-2009, 02:17 AM

Hi,

If your interested, somebody is selling 2 T28 Turbo's from a Skyline GTR, on a Custom manifold to suit a 1g-gte. I don't know how well this will suit a 1g-gte, but here's the link :

http://z20soarer.org/forums/showthread.php?t=465

I know you want to keep it Twin Turbo, so this might be a good buy, you will need to signup to view and send the person a PM.

Price on the thread I read was, for Turbo's are $250 each, and $450 for the manifold and $200 for dump pipe. The turbo's have been rebuild recently.

**VasH** · 28-01-2009, 02:20 AM

i wouldnt bother with sevens old setup, no offence seven

he would be better off keeping the blitz bags, plus a single setup is more practical.

**SillyCarS** · 28-01-2009, 02:29 AM

i'll second gt2871r if its in you budget, it will be more responsive than my gt30

**JustCallMeOrlando** · 28-01-2009, 09:35 AM

As a previous owner of a pair of said turbos, I'm with everyone else. Sell the dumps and your piping, the dumps in particular will be worth something to someone with factory twins. For that power, get yourself a KKR380 or a Garrett GT2871R as I planned to and enjoy the simplicity.

**BLK1g-gte** · 30-01-2009, 11:23 PM

Thanks for all your input and i agree with u all. I will let u know how it works out.. I agree i am not only after the power but also the repsonse....and been giving this a thought that 1jz hybrid turbos will be slow to spool...Should have just put a 1jz in it 2 years ago....