Brettus turbo 111 (the ultimate Renesis turbo ?)
#1701
Hybrid Greddy Boosted
Yep, mostly here for the Brettus updates, a lot of crickets chirping elsewhere on the site (including my garage lol).
Are you gonna log the exhaust manifold pressure vs boost? Would be interesting to compare with previous results.
Oh, and did I mention that you should definitely run it up to redline then crank up the boost to 13psi? No point doing tomorrow what can be done today - nothings gonna change!
Are you gonna log the exhaust manifold pressure vs boost? Would be interesting to compare with previous results.
Oh, and did I mention that you should definitely run it up to redline then crank up the boost to 13psi? No point doing tomorrow what can be done today - nothings gonna change!
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#1707
Just thinking back to Ve again, and how that must change under FI, but we do not know how much.
- We have around 100% VE NA(14.65 PSI absolute) at 4750RPM.
- Power is 135FWHP at this RPM, ref Racing Beat dyno
- Your setup shows 215FWHP(?) at 10 PSI(=24.65 absolute)
135HP x ( 24.65/14.65) = 227HP
227/215 = 94% VE at 10PSI and 4750RPM
If this is a valid thought, and we do it for other RPMs as well, it would be valuable data for future compressor evaluations, would it not....?
Would say your system is operating very good by looking at this math....
EDIT: For educational reasons: I was mixing up units here. 1 Atmosphere = 14.696 PSI = 1.013 Bar. So 14.65 in above calculation should be 14.67. I believed 1Bar was 1 Atm, but not exactly. https://en.wikipedia.org/wiki/Bar_(unit)
Last edited by AAaF; 07-31-2018 at 01:39 AM.
#1708
Hmm... Is this estimate FWHP or WHP?
Just thinking back to Ve again, and how that must change under FI, but we do not know how much.
- We have around 100% VE NA(14.65 PSI absolute) at 4750RPM.
- Power is 135FWHP at this RPM, ref Racing Beat dyno
- Your setup shows 215FWHP(?) at 10 PSI(=24.65 absolute)
135HP x ( 24.65/14.65) = 227HP
227/215 = 94% VE at 10PSI and 4750RPM
If this is a valid thought, and we do it for other RPMs as well, it would be valuable data for future compressor evaluations, would it not....?
Would say your system is operating very good by looking at this math....
Just thinking back to Ve again, and how that must change under FI, but we do not know how much.
- We have around 100% VE NA(14.65 PSI absolute) at 4750RPM.
- Power is 135FWHP at this RPM, ref Racing Beat dyno
- Your setup shows 215FWHP(?) at 10 PSI(=24.65 absolute)
135HP x ( 24.65/14.65) = 227HP
227/215 = 94% VE at 10PSI and 4750RPM
If this is a valid thought, and we do it for other RPMs as well, it would be valuable data for future compressor evaluations, would it not....?
Would say your system is operating very good by looking at this math....
Last edited by Brettus; 07-30-2018 at 01:33 PM.
#1709
Definitively. I was more looking at how to estimate when/if we(you) get more accurate and reliable data.
#1712
When you think about it, Bretts development has been phenomenal. Started out at 333whp@14PSI on "a slightly optimistic dyno", if memory serves me right. Now we are at the same power level @10PSI, that's massive gains in relatively short time. And sharing of findings/theories, that opens up for further understanding and development, usually there will come good ideas now and then, by doing it this way.
And the best of all, a friendly tone. If you ask/suggest in a friendly tone, that is
And the best of all, a friendly tone. If you ask/suggest in a friendly tone, that is
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northzone (08-01-2018)
#1713
Registered
When you think about it, Bretts development has been phenomenal. Started out at 333whp@14PSI on "a slightly optimistic dyno", if memory serves me right. Now we are at the same power level @10PSI, that's massive gains in relatively short time. And sharing of findings/theories, that opens up for further understanding and development, usually there will come good ideas now and then, by doing it this way.
And the best of all, a friendly tone. If you ask/suggest in a friendly tone, that is
And the best of all, a friendly tone. If you ask/suggest in a friendly tone, that is
Last edited by jcbrx8; 08-01-2018 at 01:37 PM.
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Gr8White (08-01-2018)
#1716
The E85 pump near me is having issues so that has been hampering my progress . It seems like it's not gunna get fixed any time soon. There is a pump about 50 miles away so I'm going to head up there later this week and get some. Haven't booked the dyno yet but it should be soon .
When I do get on the dyno , I'll be taking it up to around the 400whp mark initially and will see if there is any improvement over what I've done in the past . Will be looking at boost pressure vs whp . With previous designs I always started to see a poor return (extra boost vs extra hp) from about 13psi on . If I don't see any improvement on this I'll be aborting any attempt to go higher .
When I do get on the dyno , I'll be taking it up to around the 400whp mark initially and will see if there is any improvement over what I've done in the past . Will be looking at boost pressure vs whp . With previous designs I always started to see a poor return (extra boost vs extra hp) from about 13psi on . If I don't see any improvement on this I'll be aborting any attempt to go higher .
Last edited by Brettus; 08-11-2018 at 05:58 PM.
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RotaryMachineRx (08-14-2018),
stronkrotor (08-13-2018)
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Brettus (08-14-2018)
#1721
Update : went to dyno yesterday . We took it up to 14psi and 400whp and could see no improvement over my previous attempt plus it seemed to be dropping away earlier in the rpm range so we called it a day. Only positive was a slight improvement in spool up which I had noticed already. So yeah I'm disappointed but at least i still can enjoy driving the car.