GT40 turbo broken, what are my options

[Glenn Butcher]

Richard!  sorry mate.  Join through the red button at the top of the form - JOIN, or go here: http://www.mazdarotaryclub.com/shop/product_info.php?cPath=1_25&products_id=28

As for your turbo, what you really need to know is the Exhaust Housing size.

Some examples are that a GT35 (sometimes GT35/40) turbo rated at 700hp (on a piston engine) has an exhaust housing size of 1.06.  On a rotary engine that same turbo will produce just over half that amount of rated power, at similar boost.

0.70A/R for the front housing isn\'t a bad size, but you could go larger.

Selecting the correct turbo for your engine/car is a bit of a science really.

Have a search around within the Forum, here is a link for you with some great info.:
http://www.turbofast.com.au/GTseries.html

Hope this helps, sorry to mess up the thread!

[antnicuk]

on Ed\'s old turbo (GT35/40,) he made 360 rwhp at 1.1 bar, and it wasnt in a great a state of tune if i remember correctly.  That had a .94 hot side on a T4 footprint

[Ed_RX7]

cheers ant....yep its was a .96 undivided on a divided manifold...running in the low tens so pretty rich!!!.....

so whe you gonna let her rip ANT???....just gonna get a couple more bits for my new MP T70 crank it up to1.4 and see what happens....got 405 atw at about 1.2 and on a .84 rear (...bit too small to be fair) seemed restricted, so bigger rear and 4 inch tubed zorst on the way....I wanna see what difference the changes make without mapping for them..just for info....(obviously keeping an eye on AFR)

[BlitzBoy]

What does the MP stand for? is it Master Power turbos?

[Ed_RX7]

You got it Blitzy....did the side seal go whilst mapping?

[BlitzBoy]

it went 4 weeks after mapping, combination of colder temps and unmatched flowing injectors. You live and learn lol
T70 nice should give a good shuv in the back lol

[Ed_RX7]

it does to be fair running low at .95 at the mo and feels so strong...don\'t even bother switching to high boost...no point just goes mental!!!......but you know what its like...you just keep wanting more!...but after these last two changes i will leave it alone........as I feel it will get a bit too much for a street car....then up the strip at Rotorstock...i\'m in team JAYDEE by the way (as all my tuning and a few more bits and pieces are down to him)......then we can put all this arguing to an end.....

must give props to Ross who built my engine and geoff and chris for putting on a few of my bolt on goodies

...ooops...hope I haven\'t opened a can of worms :2Confused

[BlitzBoy]

ohhh Ed you have just given me an idea for RSIII, what this space in the hype section on MRC and on FDUK

[james01uk]

i feel so out of place with my little turbo\'s and only 300@wheels lol

by the time i get a single you guys will have 4 rotors  :Grrr

[royston1xx]

Hi Greg,

This had been brought to our attention as a reported post.

It was decided at the mazdarotaryclub.com AGM yesterday that we would moderate posts from NON-MEMBERS trying to sell items through the site.  Also that we won\'t be allowing NON-MEMBERS to publish their email addresses.

We will let you off this time, as we haven\'t made this public knowledge as yet.


Ok, i will cancel my course at phychic college as it obviously isn\'t working out for me and with my refund i can join here. I didn\'t realise you had to be a full paying member to help people out on this forum ( which i used to do a lot via pm before it was scrapped.)

 How much is it to join the rotary elite list? :Ladys-man

[Carl]

Hi Greg,
It would be really good if you were to join the club mate.
It is only £25.00 first time and £20.00 for a renewal.
You and other paid members get many benefits,apart from being able to see,and use all of the forum,such as discounts into events,and other benefits that will become more apparent as the year progresses.
I guess that with your course being cancelled at Phsychic college you should have known that it was waste of money,if it worked you would have known about the post being monitored!At least here you get real answers.
Regards
Carl

[richard cash]

Is there any way to measure the size of the exhaust thing as im haivng it sent off to universal turbos to see the damage and rebuild cost, would they be able to tell me the size of the exhaust wheel?

the turbo was supposed to be this one but i dont know that for definate: http://store.yahoo.com/cheapturbo/gat4b.html does that have the info you require?

[antnicuk]

cheers ant....yep its was a .96 undivided on a divided manifold...running in the low tens so pretty rich!!!.....

so whe you gonna let her rip ANT???....just gonna get a couple more bits for my new MP T70 crank it up to1.4 and see what happens....got 405 atw at about 1.2 and on a .84 rear (...bit too small to be fair) seemed restricted, so bigger rear and 4 inch tubed zorst on the way....I wanna see what difference the changes make without mapping for them..just for info....(obviously keeping an eye on AFR)

Hi Ed,

I have fitted the turbo and done a couple of other things,  (more fuel and nitrous) i have only driven it once with the new turbo and it feels more lively than the old T88 but i havent given it any stick as in this weather i have zero traction and its not mapped for the new turbo or fuel, so i just blipped it with boost controller off at wastegate pressure which is 8 psi.

Hoping to get it mapped at the end of this month....

405 ATW is pretty damn good,  i\'m still playing with old technology on my T2 engine  :2Confused   but if i get 385 with this turbo i will be happy,  plus Gas of course

[Ed_RX7]

Ok Geezer..good Luck And Keep Us All Posted!!