Anyone tried a Garrett G Series on a YB yet ?
02-11-2019, 01:52 PM
#41
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The car drove great with very little lag and a good spread of power across the Rev range.
Run for 8 months and about 1800 miles and the turbo has loads of play in it and was starting to blow oil through with the boost which collected in the plenum cover hence why it's now gone back for a bigger turbo that will not be working flat out to make the same if not more power.
Run for 8 months and about 1800 miles and the turbo has loads of play in it and was starting to blow oil through with the boost which collected in the plenum cover hence why it's now gone back for a bigger turbo that will not be working flat out to make the same if not more power.
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jsa (03-11-2019)
02-11-2019, 09:50 PM
#43
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25-05-2021, 06:49 AM
#46
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Finally got round to getting my cossie mapped on the G25-660. I wasn't looking to make big numbers, just the best drivability I could get and most importantly reliability. I'm very happy with how it drives now and wouldn't want any more power on the road as the rear wheels struggle for grip now.
25-05-2021, 08:30 PM
#47
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Finally got round to getting my cossie mapped on the G25-660. I wasn't looking to make big numbers, just the best drivability I could get and most importantly reliability. I'm very happy with how it drives now and wouldn't want any more power on the road as the rear wheels struggle for grip now.
Did they do an overlay plot of the t34 and the g series to see any gains/losses ?
25-05-2021, 08:50 PM
#48
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Seems to build boost quite late
26-05-2021, 05:55 AM
#52
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The car drives great and I haven't felt it's laggy at all. Plus a 660 gives me scope for more power in the future once i get use to it and it feels slow again.
31-05-2021, 07:40 PM
#53
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Theres a guy on gtr owners who's fitted an ams turbo kit with the g35 1050 turbos it's not performed as expected and is now getting swapped out for a boostlogic kit instead
Seems the g30 900s have some positive feedback though
Seems the g30 900s have some positive feedback though
01-06-2021, 07:35 AM
#55
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The graphs I have seen on the g series gtr’s don’t look impressive, no better than efr’s which are probably older than 10 yrs now.
Some people say they do one good pull then have issues, I’ve not seen it first hand but I’m sure John Morgan posted on it.
Some people say they do one good pull then have issues, I’ve not seen it first hand but I’m sure John Morgan posted on it.
02-06-2021, 07:33 PM
#57
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Yeah looks to have lost 500 rpm of spool, has gained 25 hp but is running an extra 3 psi of boost above what the t34 was running, so realistically if it was at the same 23 psi likely be around 425 hp imo
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Rsmat (02-06-2021)
04-06-2021, 06:06 AM
#59
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When driving it now I find It picks up low down much better than the T34 ever did, maybe it's due to the massive reduction in heat and the car in low boost on the G25 pulls harder and is much quicker and nicer to drive than it ever was on high boost on the T34.
It's massively improved how well the car drives which was the point for me. It's a road car and should be safe and reliable so I can actually use it rather than it sitting in the garage broken.
04-06-2021, 09:13 PM
#61
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It made 32psi before replacing with the following, top feed intercooler, 70mm DBW Throttle bodie and Hart plenum. After that anything over 23psi increased heat and power dropped
04-06-2021, 11:29 PM
#62
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same volume of air through a small hole will create much higher pressure than pushing it through a large hole.
It made 32psi before replacing with the following, top feed intercooler, 70mm DBW Throttle bodie and Hart plenum. After that anything over 23psi increased heat and power dropped
It made 32psi before replacing with the following, top feed intercooler, 70mm DBW Throttle bodie and Hart plenum. After that anything over 23psi increased heat and power dropped
Ah the old measure of restriction .
I'm quite shocked to hear at 23psi it got too hot and power would drop as I've never seen a T34 on a YB do that before .
05-06-2021, 09:42 AM
#63
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The only issue is the T34 was running on its limit meaning it got extremely hot and so only lasted 6 months hence needing to go bigger on the turbo.
When driving it now I find It picks up low down much better than the T34 ever did, maybe it's due to the massive reduction in heat and the car in low boost on the G25 pulls harder and is much quicker and nicer to drive than it ever was on high boost on the T34.
It's massively improved how well the car drives which was the point for me. It's a road car and should be safe and reliable so I can actually use it rather than it sitting in the garage broken.
When driving it now I find It picks up low down much better than the T34 ever did, maybe it's due to the massive reduction in heat and the car in low boost on the G25 pulls harder and is much quicker and nicer to drive than it ever was on high boost on the T34.
It's massively improved how well the car drives which was the point for me. It's a road car and should be safe and reliable so I can actually use it rather than it sitting in the garage broken.
If it's making boost lower down the rpm range now when out on the road then the t34 must of been dynoed under a higher load than the new g30 turbo was, Dyno results are only comparable when equal load is applied for each run otherwise there meaningless
I've seen this with rods old Dyno runs, engine Dyno high load made boost 4000 rpm, but on the rollers it didn't make boost til after 5000 rpm due to the rollers applying less load on the engine
It also made 838 hp on the engine dyno but only 809 hp on the rollers
06-06-2021, 06:29 AM
#64
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For me, knowing what the power and torque figures are for the car is great but also totally irrelevant as it was all about how it drives on the road.
Yes I have lost a few rpm before hitting full boost but it pulls much stronger when building up to it than with the T34
on paper I've gained about 40 lbft and 25 bhp which after the stress and cost of it all, was very disappointing but when I drove the car even in its low setting of 18psi it's so much nicer to drive and despite the numbers on the dyno sheets it feels like I've gained a massive amount more power and torque so is a little bit confusing as the numbers and the way it drives don't agree in my brain.
The mapper was a little confused as he said the same turbo on something like a evo would be up around the 550 bhp and similar torque at the same boost levels
Yes I have lost a few rpm before hitting full boost but it pulls much stronger when building up to it than with the T34
on paper I've gained about 40 lbft and 25 bhp which after the stress and cost of it all, was very disappointing but when I drove the car even in its low setting of 18psi it's so much nicer to drive and despite the numbers on the dyno sheets it feels like I've gained a massive amount more power and torque so is a little bit confusing as the numbers and the way it drives don't agree in my brain.
The mapper was a little confused as he said the same turbo on something like a evo would be up around the 550 bhp and similar torque at the same boost levels
Last edited by cossie51; 06-06-2021 at 06:34 AM.
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