My Large Extended Ports
05-30-2005, 04:33 PM
#12
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Join Date: Jan 2004
Location: london uk
Posts: 79
[quote name='diabolical1' date='May 30 2005, 07:54 AM']good luck at the track and with your future tuning sessions! let us know your results.
[/quote]
One dyno is rear wheel the other is flywheel.
Racing this weekend was too great. I kept popping that same hose as I did on the dyno.
The mickey thompson are incredible tyres. when I warm them up witha good lengthy burn out and launch at 6500 rpm they are so sticky I bog down?
I only had 3 real runs becuase of my pipe problems quickest was 12.0 @ 123mph witha 2.1 sec 60ft
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One dyno is rear wheel the other is flywheel.
Racing this weekend was too great. I kept popping that same hose as I did on the dyno.
The mickey thompson are incredible tyres. when I warm them up witha good lengthy burn out and launch at 6500 rpm they are so sticky I bog down?
I only had 3 real runs becuase of my pipe problems quickest was 12.0 @ 123mph witha 2.1 sec 60ft
05-31-2005, 01:55 AM
#14
Senior Member
Join Date: Dec 2003
Posts: 162
554 at 1.2 bar, that's a pressure ratio of 2.2.
So by implication, you have a 250HP natasp engine under there...
I don't buy that dyno plot. Car should be fast as a scalded cat, but 550? Doesn't seem possible. I would seriously question the accuracy of that dyno, or get a second opinion off another one.
Happy to be proved totally wrong, but the numbers don't quite stack up.
So by implication, you have a 250HP natasp engine under there...
I don't buy that dyno plot. Car should be fast as a scalded cat, but 550? Doesn't seem possible. I would seriously question the accuracy of that dyno, or get a second opinion off another one.
Happy to be proved totally wrong, but the numbers don't quite stack up.
05-31-2005, 03:53 AM
#15
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Join Date: Jan 2004
Location: london uk
Posts: 79
[quote name='bill shurvinton' date='May 30 2005, 10:55 PM']554 at 1.2 bar, that's a pressure ratio of 2.2.
So by implication, you have a 250HP natasp engine under there...
I don't buy that dyno plot. Car should be fast as a scalded cat, but 550? Doesn't seem possible. I would seriously question the accuracy of that dyno, or get a second opinion off another one.
Happy to be proved totally wrong, but the numbers don't quite stack up.
[/quote]
Thanks for your technical input as usual Bill. By the way what took you soooo long?
I guess you we're busy setting up all your scientific equipment and working out figures on your calculator.
I think what i'm trying to say is that I really don't care.
So by implication, you have a 250HP natasp engine under there...
I don't buy that dyno plot. Car should be fast as a scalded cat, but 550? Doesn't seem possible. I would seriously question the accuracy of that dyno, or get a second opinion off another one.
Happy to be proved totally wrong, but the numbers don't quite stack up.
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Thanks for your technical input as usual Bill. By the way what took you soooo long?
I guess you we're busy setting up all your scientific equipment and working out figures on your calculator.
I think what i'm trying to say is that I really don't care.
05-31-2005, 10:36 AM
#16
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Join Date: Aug 2004
Location: San Diego
Posts: 186
http://static.zoovy.com/merchant/hightemps...S_Pricelist.pdf Scroll down to page 18 and look at there Constant Torque clamps I have them and they look like a very good piece. And I'm planning to push in the 30psi range of boost. Hope this helps you out.
05-31-2005, 12:16 PM
#17
Senior Member
Join Date: Oct 2003
Location: I don't really exist ...
Posts: 500
chin up, man. it's all a process, you know? i know time is money, but just start forming your plan for next time. i'll cheer for ya' ...
couple of questions ...
are your secondaries set to come online at around 5800 RPM? the reason i ask is because of that little dip on both sheets.
also, what were your AFRs for those runs?
couple of questions ...
are your secondaries set to come online at around 5800 RPM? the reason i ask is because of that little dip on both sheets.
also, what were your AFRs for those runs?
05-31-2005, 12:59 PM
#18
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Join Date: Jan 2004
Location: london uk
Posts: 79
[quote name='diabolical1' date='May 31 2005, 09:16 AM']chin up, man. it's all a process, you know? i know time is money, but just start forming your plan for next time. i'll cheer for ya' ...
couple of questions ...
are your secondaries set to come online at around 5800 RPM? the reason i ask is because of that little dip on both sheets.
also, what were your AFRs for those runs?
[/quote]
No my secondaries are not the cause. Problem was I was supposed to be on the dyno approx 10:00am I didn't get on until 4pm so was a bit pushed for time so between 4500 to 6000 rpm my air/fuel ratio is really rich the dip is when air fuel ratio gets to 9.9 to 1 but because of time I didn't adjust it. I will be going back in a few weeks to map to up to 1.7 maybe 1.8 bar and will take care of it then.
Above 6000 rpm air fuel ratio is 10.5 to 1 as I said I was pushed for time as I don't have my own dyno. I only mapped this on race fuel as my water injection was quenching as my jet is too big.
couple of questions ...
are your secondaries set to come online at around 5800 RPM? the reason i ask is because of that little dip on both sheets.
also, what were your AFRs for those runs?
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[/quote]
No my secondaries are not the cause. Problem was I was supposed to be on the dyno approx 10:00am I didn't get on until 4pm so was a bit pushed for time so between 4500 to 6000 rpm my air/fuel ratio is really rich the dip is when air fuel ratio gets to 9.9 to 1 but because of time I didn't adjust it. I will be going back in a few weeks to map to up to 1.7 maybe 1.8 bar and will take care of it then.
Above 6000 rpm air fuel ratio is 10.5 to 1 as I said I was pushed for time as I don't have my own dyno. I only mapped this on race fuel as my water injection was quenching as my jet is too big.
05-31-2005, 03:40 PM
#19
Senior Member
Join Date: Dec 2003
Posts: 162
Fine don't care, but by my reckoning AT BEST you have 460-470HP at the flywheel. If you are happy that the dyno you are using is so far out as to be useless, then fine. But you cannot say you currently have a 500+HP car. The physics of it do not stack up.
Some less than professional dyno operators like to set things up to give an 'emperors new clothes' plot. Given you went on the same dyno that managed to get 380HP out of stock twins I would say that there is much of that going on.
Do I care that you don't care: NO. However it needs to be pointed out to others reading this thread that 550HP on 1.2bar on streetports is not a believable figure.
Some less than professional dyno operators like to set things up to give an 'emperors new clothes' plot. Given you went on the same dyno that managed to get 380HP out of stock twins I would say that there is much of that going on.
Do I care that you don't care: NO. However it needs to be pointed out to others reading this thread that 550HP on 1.2bar on streetports is not a believable figure.
05-31-2005, 03:45 PM
#20
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Join Date: Jan 2004
Location: london uk
Posts: 79
[quote name='bill shurvinton' date='May 31 2005, 12:40 PM']Fine don't care, but by my reckoning AT BEST you have 460-470HP at the flywheel. If you are happy that the dyno you are using is so far out as to be useless, then fine. But you cannot say you currently have a 500+HP car. The physics of it do not stack up.
Some less than professional dyno operators like to set things up to give an 'emperors new clothes' plot. Given you went on the same dyno that managed to get 380HP out of stock twins I would say that there is much of that going on.
Do I care that you don't care: NO. However it needs to be pointed out to others reading this thread that 550HP on 1.2bar on streetports is not a believable figure.
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Some less than professional dyno operators like to set things up to give an 'emperors new clothes' plot. Given you went on the same dyno that managed to get 380HP out of stock twins I would say that there is much of that going on.
Do I care that you don't care: NO. However it needs to be pointed out to others reading this thread that 550HP on 1.2bar on streetports is not a believable figure.
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