Author Topic: Turbo big enough for my M42? (Read 6583 times)

naika · « **on:** August 20, 2009, 10:49:40 AM »

Hi, I found a Garrett T04E , T3 flange with trim sizes as follows:
Compressor A/R: .42
Turbine A/R: .48

Is it going to be big enough, I want to boost only 6-7psi to start with on stock internals.

Thanks for feedbacks

bearsbmw · « **Reply #1 on:** August 20, 2009, 01:43:52 PM »

its fine for up to 10psi and then you will choke

Deftones · « **Reply #2 on:** August 20, 2009, 03:53:33 PM »

you say it's a t04e with t03 flange, so i think it's a t04e/t03... like bear says it's good for at least 10psi, under you will have an enormous lag! that is a turbine good for a 2500cc with 300hp not for a tiny 1.8 for making 190hp!

JP 91iS · « **Reply #3 on:** August 20, 2009, 06:53:41 PM »

You mean this one? Seller says its good for engines up to 2.0L

naika · « **Reply #4 on:** August 21, 2009, 03:49:47 AM »

Yup, this one.
I know he says it's good for up to a 2.0l, but I don't usually just take what people say for granted

Asking people in the know is usually a good idea before buying

I think it seems suited for my set up, as long as I'm not looking for extreme power, because of the housings sizes especially, but I can buy another once I rebuild the engine and go for more.

Anybody can confirm that will work fine for a 6-7 psi set up on stock internals?

Danny707 · « **Reply #5 on:** August 21, 2009, 01:47:13 PM »

deekay · « **Reply #6 on:** August 22, 2009, 12:55:51 PM »

that is the same turbo i got, for the same boost/power goal. you will be good.

Vladi · « **Reply #7 on:** August 23, 2009, 03:01:33 PM »

I've also got one running 10PSI. Past 4500rpm, no one can hear you scream.

naika · « **Reply #8 on:** August 24, 2009, 03:47:31 AM »

Alright, thanks guys, very helpful.
I'm going to pull the trigger on this, and especailly since it doesn't have an internal wastegate, I can buy a good quality Tial wastegate and set it exactly to the psi I want.
Should be nice

Thanks again!

Birdman16 · « **Reply #9 on:** September 13, 2009, 12:33:43 AM »

Quote from: Vladi;77305

I've also got one running 10PSI. Past 4500rpm, no one can hear you scream.

Greatest f^%#*&@ quote ever. I use this everytime people ask what my stripped e30 sounded like.

Awesome man!

AcSchnitzer318is · « **Reply #10 on:** September 13, 2009, 09:28:17 AM »

Quote from: Vladi;77305

I've also got one running 10PSI. Past 4500rpm, no one can hear you scream.

What AFR's are you running @ full boost above 4500 RPM? Around 12:1 or lower?

Danny707 · « **Reply #11 on:** September 13, 2009, 01:35:36 PM »

11.5 is the lowest you should realistically be seeing.

naika · « **Reply #12 on:** September 15, 2009, 11:14:22 AM »

When you say you're running 10psi, is it on stock internals? that sounds a bit much for me, I'm shooting for 6psi to start and I'll see, but if I can do more, I will

what do you guys think?

naika · « **Reply #13 on:** September 21, 2009, 03:59:09 PM »

bump...

AcSchnitzer318is · « **Reply #14 on:** September 21, 2009, 06:39:55 PM »

6psi is fine... lol but 10psi is better

I'm sitting at just over 9psi right now (166kpa) and at 7000rpm I am just about maxing my injectors. Sooooo... I will leave the boost there until I get some bigger ones.

If you want to stay completely safe, just for peace of mind, stay around 8psi. You'll never have to worry about anything as long as it is tuned properly.