Turbo Renesis dyno
#1
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Turbo Renesis dyno
I know that no-one on here will be impressed with these numbers but just thought some might find it interesting to see what is possible with the Renesis.
Turbo : Garrett G30-660 1.01
Manifold : custom fabricated log style low mount.
Engine: Renesis on E40 with rx7 apex seals and dowelled.
Exhaust : 3" main with separate WG exhaust
Intercooler : custom vertical row
Tune: myself using Mazdaedit
Power : 415whp @ 15psi
Turbo : Garrett G30-660 1.01
Manifold : custom fabricated log style low mount.
Engine: Renesis on E40 with rx7 apex seals and dowelled.
Exhaust : 3" main with separate WG exhaust
Intercooler : custom vertical row
Tune: myself using Mazdaedit
Power : 415whp @ 15psi
Last edited by Brettus; 11-01-21 at 06:21 PM.
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chiquito1228 (12-29-21),
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thanks for sharing, i haven't seen a Renesis dyno in maybe a decade? that is a nice looking power curve
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Brettus (11-02-21)
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Brettus (11-02-21)
#5
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Engine was built by Mark Haynes here in NZ.
#6
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thats awesome numbers, Marks doing my new motor at the moment, dam lockdown I cant go get it, Im about to respline/shorten my ford exploder axles so it should be all go when the engine comes back
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Brettus (11-03-21)
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#10
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Yes it's a 6 port .
We stopped at 7500 because I've had some nasty detonations with previous engines at high rpms at those boost levels. My theory is that exhaust ports become flow choked and the engine then starts to recirculate a ton of exhaust gas. For the street I just dump boost at around 7300 and rev it out to just over 8000.
We stopped at 7500 because I've had some nasty detonations with previous engines at high rpms at those boost levels. My theory is that exhaust ports become flow choked and the engine then starts to recirculate a ton of exhaust gas. For the street I just dump boost at around 7300 and rev it out to just over 8000.
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neit_jnf (11-08-21)
#11
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You must be thinking about this guy : https://www.rx7club.com/single-turbo...us-r5-1152962/
Yup, that's the one. Thanks. It looks like he hit ~14-15psi at roughly 3500-3600rpm. Hard to tell due to the lack of resolution in the plots. And noted vacuum leak. And he's on the 13b and different turbo setups. That all said, you're spooling up the G30-660 with 1.01 A/R only a couple hundred rpm behind the G25-600 with 0.92 A/R.
#12
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Yup, that's the one. Thanks. It looks like he hit ~14-15psi at roughly 3500-3600rpm. Hard to tell due to the lack of resolution in the plots. And noted vacuum leak. And he's on the 13b and different turbo setups. That all said, you're spooling up the G30-660 with 1.01 A/R only a couple hundred rpm behind the G25-600 with 0.92 A/R.
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scrapz (11-09-21)
#13
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I'd guesstimate about 300rpm improvement in spool-up with the 0.83 A/R on the G30-660. Which puts you in the same area as the G25-660 with 0.92 A/R. Well, I'm glad to see my estimated performance is looking to be about right.
#15
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Also seeing 1-2psi less emap than the gtx3582 0.82 I had on the car just prior to this test.
Last edited by Brettus; 12-21-21 at 07:04 PM.
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j9fd3s (12-22-21)
#16
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Have tested the 0.83 turbine housing to 10psi and seeing that by 3000rpm (3rd gear) . The manifold for the 1.01 was fabricated ms and this new one is cast stainless which has def. helped with spool also. It's looking like the improvement will be more like 400rpm to 15psi. So your prediction was about right.
Also seeing 1-2psi less emap than the gtx3582 0.82 I had on the car just prior to this test.
Also seeing 1-2psi less emap than the gtx3582 0.82 I had on the car just prior to this test.
Pretty simple. Higher compressor efficiency means less turbine power required. In this case, it looks like 3 points of compressor efficiency where you're operating. That's 3 points over 79%, or about 4% less turbine power required by the G30-660 compared to the GTX3582R. That's not enough to account for 25whp, or roughly 7% power gain. Turbine power is a combination of exhaust gas temp, exhaust gas mass flow, pressure ratio, and turbine efficiency. Assuming the exhaust gas temp is the same, we know you're seeing less pressure ratio (lower EMAP) and lower exhaust mass flow (turbine maps), so the G30-660 turbine efficiency should be higher. And the much lower rotational inertia shows up in the transient response you're feeling.
A bit more direct comparison that I've brought up before is the G30-660 in the 0.83 A/R vs. the G25-660 in the 0.92 A/R as they share the same compressor wheel. The 0.83 A/R of the G30 has slightly lower turbine flow than the G25 in the 0.92 A/R, but it should have much better efficiency due to better blade speed ratio from a better pairing of turbine and compressor wheel sizes. So the G30-660 in the 0.83 A/R will spool up faster and make more power than the G25-660 in the 0.92 A/R.
Last edited by spdracerUT; 12-29-21 at 01:23 AM.
#17
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#18
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Hmm.. Thoughts on why there was the boost control issue with the 3582? Or were you limiting based on EMAP?
#19
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Just looking at the boost logs, the 3582 lost like 0.7 psi from a 0.5 psi lower start point vs the G30 losing just 0.3psi ... It added up to 1 full psi difference between the two at peak which is worth around 14whp.
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