Anyone tried a Garrett G Series on a YB yet ?
#1
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As above has anyone fitted one of the new Garrett G25-550 or 660 turbos on a YB engine yet as I have killed my T34 on my car running it on its limits.
my mapper use to swear by the BW EFR turbos but after mapping a few none YB engines on the new Garrett G25 turbos he thinks it would work well on my car and is suggesting we use one of these rather than the EFR turbo.
my mapper use to swear by the BW EFR turbos but after mapping a few none YB engines on the new Garrett G25 turbos he thinks it would work well on my car and is suggesting we use one of these rather than the EFR turbo.
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See what Mark Shead thinks.
i think Cossiedave May have tried one.
i think Cossiedave May have tried one.
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Mark will say use an EFR turbo
Cheers Paul
Cheers Paul
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Looks like I'm going to be the first to try a G25 series turbo on a yb then.
I have spoken to my mapper today and given him permission to order it ready to fit once the tubular manifold is made..
Let's hope it's as good as he tells me or it could be an expensive mistake!
I have spoken to my mapper today and given him permission to order it ready to fit once the tubular manifold is made..
Let's hope it's as good as he tells me or it could be an expensive mistake!
Last edited by cossie51; 23-09-2019 at 03:18 PM.
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Looks like I'm going to be the first to try a G25 series turbo on a yb then.
I have spoken to my mapper today and given him permission to order it ready to fit once the tubular manifold is made..
Let's hope it's as good as he tells me or it could be an expensive mistake!
I have spoken to my mapper today and given him permission to order it ready to fit once the tubular manifold is made..
Let's hope it's as good as he tells me or it could be an expensive mistake!
What power are you aiming for?
Cheers Paul
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Im after the drive ability and having the power and torque where it's needed which my mapper tells me I will have with this turbo !
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that makes no sense?
Who is your mapper?
Cheer Paul
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If you can have 600+ bhp but it drives like crap and you have to fight for traction in every gear, what's the point ?
By mapping it for drive ability you can use the power it has which makes for a quicker road car.
No point in having more power than you can put on the ground and I'm not interested in bragging rights down the pub of how much power my car has !
Mapper is Grant baker of GB Enterprises Ltd.
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Would be interested to hear why your mapper prefers the new Garret to an equivalent sized efr
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Paul it makes perfect sense ! Plus it's a turbo and manifold upgrade not an engine build.
If you can have 600+ bhp but it drives like crap and you have to fight for traction in every gear, what's the point ?
By mapping it for drive ability you can use the power it has which makes for a quicker road car.
No point in having more power than you can put on the ground and I'm not interested in bragging rights down the pub of how much power my car has !
Mapper is Grant baker of GB Enterprises Ltd.
If you can have 600+ bhp but it drives like crap and you have to fight for traction in every gear, what's the point ?
By mapping it for drive ability you can use the power it has which makes for a quicker road car.
No point in having more power than you can put on the ground and I'm not interested in bragging rights down the pub of how much power my car has !
Mapper is Grant baker of GB Enterprises Ltd.
Im guessing your engine is almost standard?
If youve been maxing out a t34 your probably around the 400hp area, so you may not be wanting to fit say a 550hp rated turbo to your engine?
Mark Shead saw a nice 500hp to a semi standard engine on a 7064 recently so will be interesting to see if the g25 is as good as that is....
Not heard of Grant Baker before either, I look forward to your findings...
Cheers Paul
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What are the diff ratios like on the 2WD saphs? Some of the Cossies were geared for nearly 190mph and they become a bit more lively with a more suitable ratio which I think makes the gears feel a little closer too.
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it accelerates quicker than before but 70mph is now 3.5k rpm.
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The new G series look to be a great spec. The blade design on the turbine is where Garrett had been so far behind for many years. The GT series was just a change to the compressor wheel really in a vane attempt to re find lost ground. The totally new frame G series have bot new turbine and compressors.
Again re-using the Ti-Al (titanium alumnide) or Mar-M materials for the high temp ranges where efficiency and reliability needs to meet. Of course BW were there first in the EFR series but there has been other manufacturers who have used this technology for years. The MHI series had the TI-Al materials in the 90's, Holset had the turbine efficiency in the 90's, combined together MHI and Holset had great journal offers in the mid to late 2000's. It was just Garrett who kept trying to resurrect the old T series in one guise or another.
Having not tested one yet, but I do feel that the G series will be up there with the EFR. Garrett had no reason not to be.
Again re-using the Ti-Al (titanium alumnide) or Mar-M materials for the high temp ranges where efficiency and reliability needs to meet. Of course BW were there first in the EFR series but there has been other manufacturers who have used this technology for years. The MHI series had the TI-Al materials in the 90's, Holset had the turbine efficiency in the 90's, combined together MHI and Holset had great journal offers in the mid to late 2000's. It was just Garrett who kept trying to resurrect the old T series in one guise or another.
Having not tested one yet, but I do feel that the G series will be up there with the EFR. Garrett had no reason not to be.
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Im not saying you have to have 600hp plus and chase numbers Im just saying when choosing a turbo you need to know roughly what kinda power your aiming/specced for.
Im guessing your engine is almost standard?
If youve been maxing out a t34 your probably around the 400hp area, so you may not be wanting to fit say a 550hp rated turbo to your engine?
Mark Shead saw a nice 500hp to a semi standard engine on a 7064 recently so will be interesting to see if the g25 is as good as that is....
Not heard of Grant Baker before either, I look forward to your findings...
Cheers Paul
Im guessing your engine is almost standard?
If youve been maxing out a t34 your probably around the 400hp area, so you may not be wanting to fit say a 550hp rated turbo to your engine?
Mark Shead saw a nice 500hp to a semi standard engine on a 7064 recently so will be interesting to see if the g25 is as good as that is....
Not heard of Grant Baker before either, I look forward to your findings...
Cheers Paul
Unrestricted inlet meant 23psi peak holding 21psi which made 425.6bhp but turbo couldn't flow anymore.
The budget for a few upgrades got a bit out of hand last year so had to draw the line and as it was making over 400 bhp decided to leave the turbo until it started to fail.
i was happy with the power it had so told Grant to just make sure it drives as well if not better than with the T34, if it comes back with more power which I already know it will then it's a bonus. Wasn't bothered about the numbers just how it put the power down.
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425 out of a t34 running 23psi sounds optimistic
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Not if you understand how air flow and pressure work !
standard inlet use to give 32 psi. With the larger inlet you flow the same amount of air but can't built up the pressure due to no restrictions. The T34 couldn't physically flow more pressure due to it being maxed out.
standard inlet use to give 32 psi. With the larger inlet you flow the same amount of air but can't built up the pressure due to no restrictions. The T34 couldn't physically flow more pressure due to it being maxed out.
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205 block?
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Nice !!!
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The G25 is a really good turbo, it's transient response is noticeably different to the older GT units. It won't make the headline figure of '550 bhp' in the real world, but high 400's are achievable.
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the one ordered for my car is the G25-660. Not going to push it hard as current bottom end spec wouldn't take it but wanted the potential for the future.
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My crank and rods are standard but pistons have been changed for pocketed ones and head has been ported and polished and bigger inlet cam plus a few other bolt on bits and pieces.
Unrestricted inlet meant 23psi peak holding 21psi which made 425.6bhp but turbo couldn't flow anymore.
The budget for a few upgrades got a bit out of hand last year so had to draw the line and as it was making over 400 bhp decided to leave the turbo until it started to fail.
i was happy with the power it had so told Grant to just make sure it drives as well if not better than with the T34, if it comes back with more power which I already know it will then it's a bonus. Wasn't bothered about the numbers just how it put the power down.
Unrestricted inlet meant 23psi peak holding 21psi which made 425.6bhp but turbo couldn't flow anymore.
The budget for a few upgrades got a bit out of hand last year so had to draw the line and as it was making over 400 bhp decided to leave the turbo until it started to fail.
i was happy with the power it had so told Grant to just make sure it drives as well if not better than with the T34, if it comes back with more power which I already know it will then it's a bonus. Wasn't bothered about the numbers just how it put the power down.
425 hp with a t34 at 21 psi is physically impossible
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Sorry looking at wrong bit
Last edited by Adam-M; 02-11-2019 at 09:59 AM.
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I agree Steve that's why I always do timed runs before and after to see the real world gain Vs Dyno plots
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But if the Dyno is correct I'm struggling to get my head around how a t34 can physically flow enough to support 425 hp
Last edited by scoooby slayer; 02-11-2019 at 12:50 PM.
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