Highest Horsepower dynos for SC Turbo and nitrous - post them here
02-01-2012, 11:52 AM
#451
Brettus suspected this when he looked at my dyno sheet and suggested i look at the valve function.
It is not known for fact--but it does make some sense.
the big apv bump up on the dyno sheet,
the hp was continuing to climb --even at 9K
lower horsepower that I thought would be ,at under 6K
But at the same time during the dyno I remember Steve saying i had a maf reading over 380 g/sec during one pull. So I dont know for sure---thats why I am going to talk to him and follow his suggestions. I am not going to take a chance just because the a/f's look ok.
It is not known for fact--but it does make some sense.
the big apv bump up on the dyno sheet,
the hp was continuing to climb --even at 9K
lower horsepower that I thought would be ,at under 6K
But at the same time during the dyno I remember Steve saying i had a maf reading over 380 g/sec during one pull. So I dont know for sure---thats why I am going to talk to him and follow his suggestions. I am not going to take a chance just because the a/f's look ok.
02-16-2012, 10:22 PM
#452
A/R numbers of the turbos used in the kits..
These are nice to look at, but what are the A/R numbers on the turbos used in, for example, the GT3071R Dyno pull..
Kudos to Brettus for the super smooth power curve. Mad tuning skills buddy! Also, are any of these stock renesis engines?
Best wishes,
Mark
Kudos to Brettus for the super smooth power curve. Mad tuning skills buddy! Also, are any of these stock renesis engines?
Best wishes,
Mark
There once was a very popular thread that compared all the popular FI options against each other . That did turn into a bit of a shitfight after a while as it was supposed to be for BASE kits and there was always arguments about what should or shouldn't be included .
I would like this thread to be more of a no holds barred thread - lets see what people have done to get good power from their 8 whether it is supercharged Turboed or nitrous 4 port , 6port , AT or MT .
I'm hoping that people that have posted their dynos in the past will post them again in here if they meet the criteria .
Only rules are :
It must be a renesis engine with Forced Induction
Dyno must be of a members car - not a promotional dyno
Post as much information as you can about what was needed to get the power you did .
I will endevour to keep the first page updated with the top whp dynos for each particular setup .
Don't want to forget the ATs - want a 6 port AT dyno chart as well but have not seen any yet ....
I would like this thread to be more of a no holds barred thread - lets see what people have done to get good power from their 8 whether it is supercharged Turboed or nitrous 4 port , 6port , AT or MT .
I'm hoping that people that have posted their dynos in the past will post them again in here if they meet the criteria .
Only rules are :
It must be a renesis engine with Forced Induction
Dyno must be of a members car - not a promotional dyno
Post as much information as you can about what was needed to get the power you did .
I will endevour to keep the first page updated with the top whp dynos for each particular setup .
Don't want to forget the ATs - want a 6 port AT dyno chart as well but have not seen any yet ....
02-17-2012, 02:36 AM
#459
02-17-2012, 08:40 AM
#461
true that--its all about flow-not psi. Trouble is, psi numbers are easy thinking , but some folks relate psi to flow and that is not true. So by saying 300rwhp on 7 psi of boost, even though we kinda know what you mean, still doesnt break down to what is actually needed.
It would be better to say I want 300rwhp with 370 grams/sec of air flow. at 98F iat and at sea level.
It would be better to say I want 300rwhp with 370 grams/sec of air flow. at 98F iat and at sea level.
02-18-2012, 11:49 AM
#462
Thanks for the comment. I'll definitely try to be more technical next time. Obviously, some smaller fast spooling turbo and exhaust setups will never see high air flow at 7psi. But do you think a turbo with an exhaust a/r of .81 and compressor of 60, is it remotely possible to achieve flow adequate for 7psi 300HP..?
Best regards,
Mark
Best regards,
Mark
true that--its all about flow-not psi. Trouble is, psi numbers are easy thinking , but some folks relate psi to flow and that is not true. So by saying 300rwhp on 7 psi of boost, even though we kinda know what you mean, still doesnt break down to what is actually needed.
It would be better to say I want 300rwhp with 370 grams/sec of air flow. at 98F iat and at sea level.
It would be better to say I want 300rwhp with 370 grams/sec of air flow. at 98F iat and at sea level.
02-18-2012, 12:51 PM
#464
Thanks for the comment. I'll definitely try to be more technical next time. Obviously, some smaller fast spooling turbo and exhaust setups will never see high air flow at 7psi. But do you think a turbo with an exhaust a/r of .81 and compressor of 60, is it remotely possible to achieve flow adequate for 7psi 300HP..?
Best regards,
Mark
Best regards,
Mark
02-20-2012, 03:09 PM
#467
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It's just too bad that that is the traditional easy way that every person ever has used to get a paper reading of how much power their car is putting out.... I'm so glad the Rx8 community is trying to think outside of the box but show me any other model based forum where people don't give turbo size, boost and and a dyno hp number to approximate the power level of their car??
To me there is way more error in a MAF reading becuase not one of ours on this forum are even calibrated the same..... so what does that give us? MORE ASSUMPTIONS
I hate when you guys **** on new members for asking a questions that would be normal on any other forum.... measuring my MAF at certain T and at this atmospheric P?? Sure in theory that sounds awesome but in real life there is just as large of error as stating this turbo size and this pressure level approximately give you this much HP
/endrant
02-20-2012, 04:00 PM
#468
It's just too bad that that is the traditional easy way that every person ever has used to get a paper reading of how much power their car is putting out.... I'm so glad the Rx8 community is trying to think outside of the box but show me any other model based forum where people don't give turbo size, boost and and a dyno hp number to approximate the power level of their car??
To me there is way more error in a MAF reading becuase not one of ours on this forum are even calibrated the same..... so what does that give us? MORE ASSUMPTIONS
I hate when you guys **** on new members for asking a questions that would be normal on any other forum.... measuring my MAF at certain T and at this atmospheric P?? Sure in theory that sounds awesome but in real life there is just as large of error as stating this turbo size and this pressure level approximately give you this much HP
/endrant
To me there is way more error in a MAF reading becuase not one of ours on this forum are even calibrated the same..... so what does that give us? MORE ASSUMPTIONS
I hate when you guys **** on new members for asking a questions that would be normal on any other forum.... measuring my MAF at certain T and at this atmospheric P?? Sure in theory that sounds awesome but in real life there is just as large of error as stating this turbo size and this pressure level approximately give you this much HP
/endrant
I'll listen to Team about FI when he actually achieves something worthwhile . Till then ,in my eyes, he is just a frustrated FI wannabe .
02-21-2012, 09:51 AM
#470
I agree with Brettus.
But, to stay on topic, I'd like to know what we can do to increase the torque of our small footprint renesis engines... I know we can reach high HP levels, but is it impossible?
Also,
It doesn't really matter. I'm just curious and interested. People have been toying with these engines for many years, so I was just seeing if anyone has ever found a perfect turbo housing, a/r exhaust and compressor trims, turbo manifold exhaust design, exhaust system, etc combination that works very well with our stock engines.
When I tell people I am boosting a Renesis engine, they all trip out. Old school RX7 people tell me the compression is too high and that I'll blow the motor. But I see some people here that have successfully boosted their Renesis to over 60k, with more than 90% boosted.
I know of engines, such as the N54 with high compression to begin with. Now, I know you can't compare rotaries and piston engines, but compression ratio is compression ratio to me. They're able to run reliably at various boost settings, with good tuning.
Best regards,
Mark
But, to stay on topic, I'd like to know what we can do to increase the torque of our small footprint renesis engines... I know we can reach high HP levels, but is it impossible?
Also,
When I tell people I am boosting a Renesis engine, they all trip out. Old school RX7 people tell me the compression is too high and that I'll blow the motor. But I see some people here that have successfully boosted their Renesis to over 60k, with more than 90% boosted.
I know of engines, such as the N54 with high compression to begin with. Now, I know you can't compare rotaries and piston engines, but compression ratio is compression ratio to me. They're able to run reliably at various boost settings, with good tuning.
Best regards,
Mark
02-21-2012, 10:07 AM
#473
I agree with Brettus.
But, to stay on topic, I'd like to know what we can do to increase the torque of our small footprint renesis engines... I know we can reach high HP levels, but is it impossible?
Also,
It doesn't really matter. I'm just curious and interested. People have been toying with these engines for many years, so I was just seeing if anyone has ever found a perfect turbo housing, a/r exhaust and compressor trims, turbo manifold exhaust design, exhaust system, etc combination that works very well with our stock engines.
When I tell people I am boosting a Renesis engine, they all trip out. Old school RX7 people tell me the compression is too high and that I'll blow the motor. But I see some people here that have successfully boosted their Renesis to over 60k, with more than 90% boosted.
I know of engines, such as the N54 with high compression to begin with. Now, I know you can't compare rotaries and piston engines, but compression ratio is compression ratio to me. They're able to run reliably at various boost settings, with good tuning.
Best regards,
Mark
But, to stay on topic, I'd like to know what we can do to increase the torque of our small footprint renesis engines... I know we can reach high HP levels, but is it impossible?
Also,
It doesn't really matter. I'm just curious and interested. People have been toying with these engines for many years, so I was just seeing if anyone has ever found a perfect turbo housing, a/r exhaust and compressor trims, turbo manifold exhaust design, exhaust system, etc combination that works very well with our stock engines.
When I tell people I am boosting a Renesis engine, they all trip out. Old school RX7 people tell me the compression is too high and that I'll blow the motor. But I see some people here that have successfully boosted their Renesis to over 60k, with more than 90% boosted.
I know of engines, such as the N54 with high compression to begin with. Now, I know you can't compare rotaries and piston engines, but compression ratio is compression ratio to me. They're able to run reliably at various boost settings, with good tuning.
Best regards,
Mark
We're going OT...
However don't focus too much on compression, that's not the real issue if the tuning is right. It may leave less margin for error but that's almost irrelevant if the tuner knows what he's doing.
What limits our engine is also what makes it great and it's the exhaust port location. It limits the overall output\flow, overheats and whatever but is also a great contributor to our lovely powerband. Given our engine's limits i wouldn't really build a system around an used unit without addressing some areas of concern first. That's just me though.
I wouldn't use anything over a gtx35xx or similar series turbo. I'd also spend some time researching for the right turbine blades to use.
That's because of the way the exhaust gasses are expelled from a side port vs a peripheral one and the right blade setup has a huge influence on spool time etc. I definitely wouldn't use a precision turbo or any other product from a manufacturer that only lists voodoo crap on their website, without releasing real specs.
I'm not saying this for any particular reason but knowing how to read turbo charts, flow maps, impeller\propeller (whatever they are called in eeeengrish) shapes etc should be mandatory before discussing any build for any application. Even knowing your engine (VE, CFM etc etc etc at various load\rpm\whatever conditions) matters.
The trend on various fora is to throw some names, numbers, random specs and wait for somebody else's input. That may work in an ideal world... unfortunately the guy replying to you probably knows less than you do and is just parroting something he doesn't really understand.
Last edited by bse50; 02-21-2012 at 10:11 AM.
02-21-2012, 07:10 PM
#475
thats a good question dude.
But without getting into a long detailed post about tq--lets just say anything you can do to increase power you will also have an increase in Tq. The rotary will never be an engine known for Tq.
its Te is too bad.
The only thing I know that could possibily increase tq without actually focusing on hp is friction coatings--but that wouldnt be a lot? Probably not worth it if you are not rebuilding at the same time.
You have to rev this sucker to get power out of it.
But without getting into a long detailed post about tq--lets just say anything you can do to increase power you will also have an increase in Tq. The rotary will never be an engine known for Tq.
its Te is too bad.
The only thing I know that could possibily increase tq without actually focusing on hp is friction coatings--but that wouldnt be a lot? Probably not worth it if you are not rebuilding at the same time.
You have to rev this sucker to get power out of it.