most hp at 10 psi and 14 psi
10-10-02 | 08:58 AM
#1
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From: Tampa FL
most hp at 10 psi and 14 psi
ok, what is the most horsepower that anyone has made at 10 psi and 14psi.
I know that most people who have singles try to shoot for 400rwhp. I also know that most people that run singles don't run as low as 10 psi but if anyone has any data on this #, please psot it.
The reason I ask is that afriend of mine said he dynoed his car at 370 rwhp at 10 psi with upgraded twins. He is now running a t04s and feels that he should be able to hit around 400 rwhp at 10 psi with the single. otherwise why go to the single if it will only make the same hp. I told him that from what I had heard, most people with singles are happy to get 400 rwhp with around 14 psi and I could not understand how he accomplished 370 at 0nly 10psi with upgraded twins.
He said he has the dyno slip and I believe him as I know he is not the kind of person to lie. I asked if his boost guage is off. he said no and that the PMS showed the same boost. He also said that he knew of other people on the big list that also have put down that kind of hp. I personally put down 370 hp with my car, but that was at 13psi. I too have upgraded twins. I also have more porting done to my manifolds than he has.
WE both have streetported motors and all the intake and exhaust goodies.
This just seems odd to me, so i figured I would get some #'s to use for comparison and see if anyone else can confirm these results.
mike
I know that most people who have singles try to shoot for 400rwhp. I also know that most people that run singles don't run as low as 10 psi but if anyone has any data on this #, please psot it.
The reason I ask is that afriend of mine said he dynoed his car at 370 rwhp at 10 psi with upgraded twins. He is now running a t04s and feels that he should be able to hit around 400 rwhp at 10 psi with the single. otherwise why go to the single if it will only make the same hp. I told him that from what I had heard, most people with singles are happy to get 400 rwhp with around 14 psi and I could not understand how he accomplished 370 at 0nly 10psi with upgraded twins.
He said he has the dyno slip and I believe him as I know he is not the kind of person to lie. I asked if his boost guage is off. he said no and that the PMS showed the same boost. He also said that he knew of other people on the big list that also have put down that kind of hp. I personally put down 370 hp with my car, but that was at 13psi. I too have upgraded twins. I also have more porting done to my manifolds than he has.
WE both have streetported motors and all the intake and exhaust goodies.
This just seems odd to me, so i figured I would get some #'s to use for comparison and see if anyone else can confirm these results.
mike
10-11-02 | 06:22 AM
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From: Tampa FL
Hey Ernie, from the sound of your second post, it would seem that your first reply was meant to be sarcastic. Am I taking this correcetly or did you actually accomplish that #. I only ask, as I do not know what is ultimately feasable given propper tuning at 10 psi. like I said this also seems pretty high to me but without the benefit of more experience I can not be sure.
If you did make 372 was this with your single and if you didn't, what is the most you have put down at 10 psi or whatever you know at your lowest boost run.
Anybody else have any input. This will also help me judge if I am in the right spot with my car. I am still tuning and could use the info for reference.
mike
If you did make 372 was this with your single and if you didn't, what is the most you have put down at 10 psi or whatever you know at your lowest boost run.
Anybody else have any input. This will also help me judge if I am in the right spot with my car. I am still tuning and could use the info for reference.
mike
10-11-02 | 07:44 AM
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From: Tampa FL
I know that the twins that he was using at the time had upgraded compressor wheels and a 10% clip on the exhaust side. He is now running a to4s but has not dynoed this setup yet.
My twins have larger exhaust wheels and shafts (T25)
and super 60 compressor wheels. The outlets of the compressor housings have also been enlarged. I managed 370 but this was at 13 psi.
Another thing that bothers me is that he is still running stock injectors. Are the stock inj. even capable of supporting this peak hp? He said they were maxed out but I was maxing mine out at 310 hp along time ago. When I run at 13 psi now, I am in the mid 80% range. I have 550/1200's.
I think I am going to have to ask for the dyno sheet as all logic says this is impossible. The thing that perplexes me is that I am friends with the guy and he has never been the type to lie or exagerate. This is why I thought that he might have gotten a false boost reading. But if he really made 370, whether at 10 psi or 14 psi, the injectors should have literally run out of gas I would think.
mike
My twins have larger exhaust wheels and shafts (T25)
and super 60 compressor wheels. The outlets of the compressor housings have also been enlarged. I managed 370 but this was at 13 psi.
Another thing that bothers me is that he is still running stock injectors. Are the stock inj. even capable of supporting this peak hp? He said they were maxed out but I was maxing mine out at 310 hp along time ago. When I run at 13 psi now, I am in the mid 80% range. I have 550/1200's.
I think I am going to have to ask for the dyno sheet as all logic says this is impossible. The thing that perplexes me is that I am friends with the guy and he has never been the type to lie or exagerate. This is why I thought that he might have gotten a false boost reading. But if he really made 370, whether at 10 psi or 14 psi, the injectors should have literally run out of gas I would think.
mike
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10-14-02 | 06:45 AM
#10
370 hp on stock twins at 10 psi is pretty hard to swallow. My T-78 doesn't make that much at 10 psi.
There is always a possible 'fudge factor' involved when comparing dyno results. It is possible to have results that are very inaccurate if parameters such temperature are registered incorrectly in the dyno software. This being said, your friend may very well have a dyno sheet that backs up his numbers.
If you average all the of the hp numbers you see posted on this board, you'll see that it is unlikely that stock twins (even upgraded) could make that much power.
There is always a possible 'fudge factor' involved when comparing dyno results. It is possible to have results that are very inaccurate if parameters such temperature are registered incorrectly in the dyno software. This being said, your friend may very well have a dyno sheet that backs up his numbers.
If you average all the of the hp numbers you see posted on this board, you'll see that it is unlikely that stock twins (even upgraded) could make that much power.
10-14-02 | 07:26 PM
#11
Twin Turbo LSX
Joined: Mar 2001
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From: Jacksonville, Fl
The reason I ask is that afriend of mine said he dynoed his car at 370 rwhp at 10 psi with upgraded twins. He is now running a t04s and feels that he should be able to hit around 400 rwhp at 10 psi with the single. otherwise why go to the single if it will only make the same hp. I told him that from what I had heard, most people with singles are happy to get 400 rwhp with around 14 psi and I could not understand how he accomplished 370 at 0nly 10psi with upgraded twins
Are you reffering to Sergio's car? I saw him put down something like 367rwhp on a mustang dyno in orlando awhile back. I could have sworn he was on 12psi. Still a very good number for the amount of boost.
Btw, this is Bryan Mahin. I believe we met at the Rolex 24hr race two years ago. I have a black R1. heh.. I know this probably doesn't ring a bell.
10-14-02 | 07:50 PM
#12
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From: G-vegas, SC
Originally posted by Michael Filippello
Another thing that bothers me is that he is still running stock injectors. Are the stock inj. even capable of supporting this peak hp? He said they were maxed out but I was maxing mine out at 310 hp along time ago. When I run at 13 psi now, I am in the mid 80% range. I have 550/1200's.
mike
Another thing that bothers me is that he is still running stock injectors. Are the stock inj. even capable of supporting this peak hp? He said they were maxed out but I was maxing mine out at 310 hp along time ago. When I run at 13 psi now, I am in the mid 80% range. I have 550/1200's.
mike
Absolutely NO WAY he is making 400rwhp with stock injectors. I made 370rwhp with my T-78 at 12psi with 550/1200's at 85% inj duty. I made 405 rwhp at 16-17psi with 850/1200's at 80% inj duty. I don't feel like making the calculations, but at any sort of reasonably safe A/F ratio and pump gas, i would have to say 400rwhp with the stock injectors is not possible!!
10-14-02 | 09:13 PM
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From: Tampa FL
Ok, to answer a couple of questions.
1) the turbos that I have were done by Turbonetics. From what I understand they do not do this upgrade anylonger. And I can understand why.
2) yes this is sergio's car. I was told this was done at 10 psi. If you say you think it was actually 12psi then I can better believe it myself. when I put down 370 the boost peak hold indicator on my power Fc read .90 bar. This peak # was actually recorded at a spike when the secondary turbo came online. I believe I actually was around .86 psi when I made peak horsepower at 7k. I can not say for sure as I was not allowed to make the runs myself and had to rely on tuning from my log. That is why I say 13psi. I would hate to be called a fibber.
3) Just to point out. I never said he made 400hp with the twins or any turbo. The # is 370 rwhp. After going to the RX7.com site and using the fuel calculator, it seems as though the stock injectors are capable of 420 bhp. Using 15% loss for drive train and you get 360 rwhp at 100% duty. This is pretty close to what was reported. 367 rwhp at 99% duty. The big question was how was this accomplished at only 10psi? This is were the descrepancy probbably lies.
as a final note. after tuning my car in with the DIY WB I am now only running 77% duty cycle at 1bar. My air fuels are good and this is on the highway were we get better cooling of intake charge and make more hp than we get on the dynos. like I said early, I am running 550/1200 also.
hope this helps answer some questions. It helps to know that someone else saw this run too.
Hey Bryan, It was me at the 24hrs. I have the red Rx7. How is everything going?
mike
1) the turbos that I have were done by Turbonetics. From what I understand they do not do this upgrade anylonger. And I can understand why.
2) yes this is sergio's car. I was told this was done at 10 psi. If you say you think it was actually 12psi then I can better believe it myself. when I put down 370 the boost peak hold indicator on my power Fc read .90 bar. This peak # was actually recorded at a spike when the secondary turbo came online. I believe I actually was around .86 psi when I made peak horsepower at 7k. I can not say for sure as I was not allowed to make the runs myself and had to rely on tuning from my log. That is why I say 13psi. I would hate to be called a fibber.
3) Just to point out. I never said he made 400hp with the twins or any turbo. The # is 370 rwhp. After going to the RX7.com site and using the fuel calculator, it seems as though the stock injectors are capable of 420 bhp. Using 15% loss for drive train and you get 360 rwhp at 100% duty. This is pretty close to what was reported. 367 rwhp at 99% duty. The big question was how was this accomplished at only 10psi? This is were the descrepancy probbably lies.
as a final note. after tuning my car in with the DIY WB I am now only running 77% duty cycle at 1bar. My air fuels are good and this is on the highway were we get better cooling of intake charge and make more hp than we get on the dynos. like I said early, I am running 550/1200 also.
hope this helps answer some questions. It helps to know that someone else saw this run too.
Hey Bryan, It was me at the 24hrs. I have the red Rx7. How is everything going?
mike
10-20-02 | 12:41 AM
#15
Banned. I got OWNED!!!
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From: Bannished
Originally posted by Michael Filippello
Another thing that bothers me is that he is still running stock injectors. Are the stock inj. even capable of supporting this peak hp? He said they were maxed out but I was maxing mine out at 310 hp along time ago. When I run at 13 psi now, I am in the mid 80% range. I have 550/1200's.
Another thing that bothers me is that he is still running stock injectors. Are the stock inj. even capable of supporting this peak hp? He said they were maxed out but I was maxing mine out at 310 hp along time ago. When I run at 13 psi now, I am in the mid 80% range. I have 550/1200's.
10-20-02 | 12:48 AM
#16
Banned. I got OWNED!!!
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From: Bannished
Originally posted by Michael Filippello
as a final note. after tuning my car in with the DIY WB I am now only running 77% duty cycle at 1bar. My air fuels are good and this is on the highway were we get better cooling of intake charge and make more hp than we get on the dynos. like I said early, I am running 550/1200 also.
mike
as a final note. after tuning my car in with the DIY WB I am now only running 77% duty cycle at 1bar. My air fuels are good and this is on the highway were we get better cooling of intake charge and make more hp than we get on the dynos. like I said early, I am running 550/1200 also.
mike
I run 850/1300's on stock twins and in +30C intake tuned temps I run 72% at 1bar. Now tonight in +15C intake I ran up to 92% INJ duty at .9bar. Glad I tuned up the temperature correction maps rich (10.8 AFR).
Why does everyone ignore temperature?
10-20-02 | 11:43 PM
#17
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From: Marysville, Ohio
temps are ignored simply cause there are too many other "important" factors too look at. Here in Ohio, we have safety tuners, such as BaDog.
A T78 shouldnt be a good low boost turbo, so i would suspect that a T04E would be more efficient in the 10psi range....just a thought though.
A T78 shouldnt be a good low boost turbo, so i would suspect that a T04E would be more efficient in the 10psi range....just a thought though.
10-23-02 | 03:55 PM
#18
I personally think that his numbers are "optimistic." He has no 1/4 mile times or MPH's to back them up.
He actually doesn't have a dyno sheet to back it up if I remember correctly (his runs were actually much lower [320 rwhp] but he inflates them because it is a mustang dyno).
I asked him to humor me and get a dynojet dyno run OR run down the drag strip a time or two, but he wasn't interested.
His high hp runs on stock twins were also with a really rich a:f (mostly in the 10's). It just doesn't add up to 370 rwhp. I don't think he is BSing, I just think he is mistaken.
Wade
He actually doesn't have a dyno sheet to back it up if I remember correctly (his runs were actually much lower [320 rwhp] but he inflates them because it is a mustang dyno).
I asked him to humor me and get a dynojet dyno run OR run down the drag strip a time or two, but he wasn't interested.
His high hp runs on stock twins were also with a really rich a:f (mostly in the 10's). It just doesn't add up to 370 rwhp. I don't think he is BSing, I just think he is mistaken.
Wade
10-23-02 | 05:31 PM
#19
Originally posted by Wade
I personally think that his numbers are "optimistic." He has no 1/4 mile times or MPH's to back them up.
He actually doesn't have a dyno sheet to back it up if I remember correctly (his runs were actually much lower [320 rwhp] but he inflates them because it is a mustang dyno).
I asked him to humor me and get a dynojet dyno run OR run down the drag strip a time or two, but he wasn't interested.
His high hp runs on stock twins were also with a really rich a:f (mostly in the 10's). It just doesn't add up to 370 rwhp. I don't think he is BSing, I just think he is mistaken.
Wade
I personally think that his numbers are "optimistic." He has no 1/4 mile times or MPH's to back them up.
He actually doesn't have a dyno sheet to back it up if I remember correctly (his runs were actually much lower [320 rwhp] but he inflates them because it is a mustang dyno).
I asked him to humor me and get a dynojet dyno run OR run down the drag strip a time or two, but he wasn't interested.
His high hp runs on stock twins were also with a really rich a:f (mostly in the 10's). It just doesn't add up to 370 rwhp. I don't think he is BSing, I just think he is mistaken.
Wade
I guess everyody just wants to have more power, who can blame them...
