hi guys ..... I would like to change my T34 for something more powerful, I thought of T38 or GT30, but not as many rpm work.
I would like to be progressive, not at high rpm.
get me out of doubt. thanks.

 

GT30 should be quite good with not to much lag, think the T34 and more so the T38 get progresively more *laggy* the bigger you go

edit: also dependes what engine your intending to run it on??

 

this is a nice set up - depends on your budget

this is what i would go for: gt3071r, siemens 83lbs injectors, hart inlet plenum, rs500 intercooler, MSD chip, ported head.

more of a budget spec: gt3071r, siemens 83lbs injectors, 4x4 inlet with spacer, rs500 intercooler, MSD chip.

 

I want is to have more power from low rpm, not only have up. and if possible some lag.
gt3071r, siemens 83lbs injectors, inlet with 4x4 spacer, RS500 intercooler, MSD chip. is possible for me.
but it will be what I want?

 

depends on how much power you want; also the cam choice will make a difference.

do you have valve cut outs in your pistons?

 

yes, i have valve cut outs in pistons and kent cams. but not exactly the type BD are

 

GT3071, Std comp ratio, big cam, decent cooler and management, hart inlet or spaced std one, and lots of boost

 

I have a GT30/71, bd14 inlet cam, Bosch 750cc injectors, vipec ecu I highly recommend it


Luciano

 

You'd be better off building a 2.1 or 2.2 bottom end, and use a gt3071r.

Cossies as standard aren't built for progressive power say like a 20v vw is,
its an old school low comp setup using old school injection.
The yb is all about nothing nothing nothing then bam power.

depending on how much power you want will determine the drivability and torque characteristics with regards to low rpm.

 

Not so if mapped properly!!!cam choice is essential also...
As long as the cr isnt too low then a gt30 will work very well with the right inlet cam and mapping with near zero lag...


cheers danny

 

T38 will also work well on the correct CAM/s too and good mapping, mine wasn't great because the Engine wasn't speced for the 38, but Steve aka cossie4i makes a nice 440bhp as you know Danny from quite a nice low down boost too...

 

You can use a bd14 as you have valve cut outs.

To get the most of the spec you choose, you really need to have it live mapped and not a "off the shelf chip"

have you got someone who can map the car for you in Spain?

 

I do not know of any site here in Spain, near my house is a site that mapped cars, but are not specialists in cosworth, I can ask, but I do not like that practiced with my car

 

Looks like you need a road trip over here fella head for marlow and MA Developments


Luciano

 

Yeah he has the tt t38 witch is much better than the ut t38 imo and it works well,he also has a ported head an ab 07 cam ec4 inlet plenum and now a better fuel map so has all the right ingredients..


cheers danny

 

Or come to some one that will map webber!!!ME!!lol


cheers danny

 

I would not mind going, but now is impossible , I will ask around here and speak with MSD also

 

how much u sellin t34 if you go bigger??

 

Never ever sell anything, if I need later

 

there is a guy from spain on this website called "Rafa cosworth" he may know of someone who can map your car in spain for you. maybe send him a private message

 

https://passionford.com/forum/member...-cosworth.html

 

I see that there are several models of GT30.
one is the other gt3076r gt3071r
valve also external or internal.
which would be better for my spec? thanks

 

gt3076 is a 550hp+ turbo
gt3071r is 450-500hp turbo, 3 different exhaust housings to choose from, .63, .82 or 1.06. you want the .82

you want a internally gated one unless you want the headache of fitting a external wastergate. a guy on here runs the gt3071r with 2.5 bar boost, inlet cam, rs500 intercooler and gets 480hp & 474 ft/lb torque.

 

I will decide for gt3071r, but it is better to exhaust housings .82?
I like external wg but I'll put in 2wd exhaust I will go very well