Long time no see all.


I know GT30 turbos where the thing back in early 2000`s and since been replaced with Borg Warner but i know you need to use different manifolds for BW etc.

I have been offered a GT3082 (new) for my cossie being as most of you might have had them on the car 10-15 years on we must know more about them are they still a good turbo? this is the GT and not GTX variant.

 

I run a GTX and they are leagues ahead of the GT series mate , ive not seen a Gt30 powered car for a while now. Welcome back

 

What gtx do you run?
Do they do a internal gated gtx. Do you think a gt30 rear housing will go on gtx 30?

 

Hi mate , I run a GTX2867R Gen 2 and yea they do internally Gated as mine is .

 

I had a gt3076 on my saff before I chucked a rod. It went really well

 

I'd say go for it I'm sure mark has fitted one to stock manifold aswell with good results.

I had a gt4094r on an rb27 engine made over 700 hp at 1.7 bar, newer turbos will be abit more efficient but I don't believe it will be miles of difference in real terms and costs will be vastly reduced

 

G series turbos are better than the GTX turbos from what I’ve seen.

 

i keep looking at these but not much knowledge out there on cosworth engines.

 

I had the GT30/71 on my sapphire it had a .82 housing on it, awesome, car went very well, imo didn’t really notice it off the line but when doing 100+ mph and you sank ya boot car just kept on pulling, significantly different to the T34 .48 I had on the car previously, a long time ago now

 

I did end up buying it then got offered a Garret G25-550 which i couldn't turn down. so got a load of turbos to chose from.

 

I think i would be very happy with a good GT3071 at 450ish
Ive got some siemens 83lb on the shelf. Rest of car is ready. Just need MSD to map.. hmmm maybe next year upgrade from my T35.....

 

Putting 2 and 2 together, i think you brought my Turbo off me

 

You'll be mega with the G25 550 , I was going to go G series but​​​​​​ I'm already capping the delivery and toque to get it quicker up the road so was a pointless exercise.

 

Nothing wrong with gt30 setup even in todays world.
People are still using T series turbos!

Get the right spec gt30 for your setup and it would still be epic even matches up against something with the latest turbo setup.

Not all tuners can work this magic though 😉

Cheers Paul

 

I’ve gone the efr route but part of me regrets this.
Feel I should have kept it simple with 3071r Siemens and live map the p8.
Wouid have saved lots of money and hassle.
I also feel the turbo lag is part of the cars character on the t34 etc.

Cant fully comment until I drive the car with the efr

 

Hi mate, yes, no problem with it just now i have got the chance to get a G25-500.

 

I think thats why people love the T4 so much as its give so much lag and makes the cossie. but saying that i have been in a roller bearing T4 and that was very similar to GT30.

 

In what sense is the Gt3071 easier? I didn’t think upgrading to a Gt30 was easy either. But my main problem is that I need live mapping for any non T-series turbo, which is a problem when you’re not in the UK.

 

I believe you need the downpipe and oil return fittings custom made to fit the efr where as the gt30 is a straight forward bolt in.

Also many people go for an aftermarket manifold with the efr as to get the best from it you really need to pair it with a custom manifold.

Than then reqs an alternator drop down bracket.

Cheers Paul

 

As Paul said,
the GT can be had with the standard Cosworth 3 bolt exhaust fitment and can also go on the standard 4x4 manifold.
So just water and oil feed/returns to sort.
Thats probably a Ł1200-1500 saving alone.

I didn’t mind the lag on my .55 T34 and from looking at graphs the 3071r was maybe 200rpm behind it in spool?

Sure I will change my mind once my car is mapped on the EFR I’m just looking back in hindsight

 

I thought that the GT3071R actually needed a .82 exhaust housing and that the .72 3 bolt Cosworth type would not be so great. But I guess that converting the exhaust to a V band isn’t that difficult.

A few years ago I looked into a GT28, as it should spool better than a T34 but still get the same power. I always find it strange that it seems there is no one who wants good spool with about 400 bhp. All popular upgrades, like the GT3071R and EFR7064 go close to 500 bhp and need the gearbox to be upgraded as well, at least on a 4x4.

 

I’m guessing good spool 400hp in 2wd would be great.
Always feel the 4x4 needs that bit extra.
I had the MSD 380 kit before on a .55 T34 and to be honest it was great, but just needed a little more (famous last words)
Will see how my box holds up PDE with straight cut 2nd and 3rd

 

One of the nicest Sierra's I ever drove was a Rousesport with the small turbo.

Anyone who thinks lag is good...is a bit mad. In some cases yes it is unavoidable, but rarely would I ever seek it out, vs a responsive turbo.

 

​​​​​​​Amen .