Issue with the HKS F-CON V PRO standalone.
#1
Issue with the HKS F-CON V PRO standalone.
Hi guys,
last saturday dynoed the Rx-8 with SFR custom turbo kit with HKS F-CON V PRO standalone and we got some issues, the car made a buggin in 4,000rpm and we don't know the reason!!!
I make two pulls, one is in 6.5psi (wastegate) and one in 7psi. And in 7psi made less power than the 6.5psi and both pull was use 93oct and have same problem on 4,000rpm.
Here is the dynograph in stock everything, made 158rwhp and you can see the comparassion with the 6.5psi power:
[IMG][/IMG]
Here is the dynograph 6.5psi and made 249whp and 192lb/ft and 7psi made 237whp and 187lb/ft:
[IMG][/IMG]
Any comments about the buggin in 4,000rpm. I try to fix the problem, need help.
Thanks,
Antonio.
last saturday dynoed the Rx-8 with SFR custom turbo kit with HKS F-CON V PRO standalone and we got some issues, the car made a buggin in 4,000rpm and we don't know the reason!!!
I make two pulls, one is in 6.5psi (wastegate) and one in 7psi. And in 7psi made less power than the 6.5psi and both pull was use 93oct and have same problem on 4,000rpm.
Here is the dynograph in stock everything, made 158rwhp and you can see the comparassion with the 6.5psi power:
[IMG][/IMG]
Here is the dynograph 6.5psi and made 249whp and 192lb/ft and 7psi made 237whp and 187lb/ft:
[IMG][/IMG]
Any comments about the buggin in 4,000rpm. I try to fix the problem, need help.
Thanks,
Antonio.
Last edited by ghlisa; 09-04-2006 at 06:54 PM.
#2
Registered
Check your AFR in the dyno shot here:
notice how the AFR spikes right about 4250 rpm? You might have a problem in your fuel map because all of the sudden you're running very lean.
So it's either your injectors (which it doesn't look like according to the rest of the dyno) or a problem with the fuel map. At least that's how it looks to me and i am by no means an expert.
notice how the AFR spikes right about 4250 rpm? You might have a problem in your fuel map because all of the sudden you're running very lean.
So it's either your injectors (which it doesn't look like according to the rest of the dyno) or a problem with the fuel map. At least that's how it looks to me and i am by no means an expert.
#4
The problem can be the following:
1- fuel map
2- DW throttle body
3- Secundary injectors, Im using for secundary injectors the stock ones, and the primary is RC 450cc. SFR should sent me the 550cc for the secundary one, but he didnt get the right one, so, at moment I used the stocks one. Somebody know where can I get the correct secundary injectors or better somebody have a upgrade fuel upgrade system with return line??
Your comments will be appriciated.
Thanks,
Antonio.
1- fuel map
2- DW throttle body
3- Secundary injectors, Im using for secundary injectors the stock ones, and the primary is RC 450cc. SFR should sent me the 550cc for the secundary one, but he didnt get the right one, so, at moment I used the stocks one. Somebody know where can I get the correct secundary injectors or better somebody have a upgrade fuel upgrade system with return line??
Your comments will be appriciated.
Thanks,
Antonio.
#6
Here is another very rare thing, after I make the pull on 7psi and get lower hp, I turn off the boost control, thats mean back to 6.5psi. And I want almost 15 minutes and make again one pull. this pull in 6.5psi only get 183whp with 159lb/ft
in same condition as first two pulls and is running much lean than the two first time. So thats why I feel sometimes the car moves more much faster. I don't know what happened.
Here is the dynograph:
[IMG][/IMG]
Thanks,
Antonio
in same condition as first two pulls and is running much lean than the two first time. So thats why I feel sometimes the car moves more much faster. I don't know what happened.
Here is the dynograph:
[IMG][/IMG]
Thanks,
Antonio
#7
Registered
it's not the ports (they don't pop until 6250 or 6750 or whatever) and I don't think it's the injectors. The secondaries turn on at 3750. IMHO, it really does look like it's the fuel map.
#9
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If you are near SFR, then you may be near SP Engineering (City of Industry). They are the ones that worked on my car, so they know what they are doing with the HKS V Pro.
#12
Originally Posted by Jon
twin injector compensation isnt set properly, when the injectors are switching on the air/fuel is going lean
#13
Registered User
So when are you opening the SSV(Secondary Shutter Valve)?
This is roughly the rpm range where the factory ecu opens the SSV,the exact rpm depends on engine load etc.In the case of the factory ecu,the SSV is timed to open with the Secondary fuel injector.
It looks like you don't have enough fuel from Secondary injectors when the SSV opens.
This is roughly the rpm range where the factory ecu opens the SSV,the exact rpm depends on engine load etc.In the case of the factory ecu,the SSV is timed to open with the Secondary fuel injector.
It looks like you don't have enough fuel from Secondary injectors when the SSV opens.
#14
Mazsport.net
Join Date: Mar 2005
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Fuel system!
3- Secundary injectors, Im using for secundary injectors the stock ones, and the primary is RC 450cc. SFR should sent me the 550cc for the secundary one, but he didnt get the right one, so, at moment I used the stocks one. Somebody know where can I get the correct secundary injectors or better somebody have a upgrade fuel upgrade system with return line??
Your comments will be appriciated.
Thanks,
Antonio.
We have a complete plug and play fuel system available for the RX-8. 1-800-538-9989,Scott
Your comments will be appriciated.
Thanks,
Antonio.
We have a complete plug and play fuel system available for the RX-8. 1-800-538-9989,Scott
Last edited by MazsportScott; 09-06-2006 at 09:25 PM.
#15
Are you positive that the primary's are RC 550's???
Originally Posted by ghlisa
How can I set the twin injector properly??? Is something about the secundary injectors?? because I use RC 550cc primary and secundary I use stock injectors
#17
i'm about 95% positive that whoever installed the injectors did not put them in the primary's because RC injectors are too wide to fit in the primary location due to the casting on the center plate. So what i think is happening is, either they left the stock injectors in the primary's or if they were smart they would have swapped them for the larger secondary's which do fit in the plate. This being said you are probably running out of injector at that rpm and the secondary's are engaging too late.
#18
Originally Posted by Jon
i'm about 95% positive that whoever installed the injectors did not put them in the primary's because RC injectors are too wide to fit in the primary location due to the casting on the center plate. So what i think is happening is, either they left the stock injectors in the primary's or if they were smart they would have swapped them for the larger secondary's which do fit in the plate. This being said you are probably running out of injector at that rpm and the secondary's are engaging too late.
What level of HP is good for the stock injectors??? can be use until 350rwhp???
Thanks,
Antonio.
#19
Early RX8 Adopter
Originally Posted by ghlisa
Im going to check what you said. But in this case, you basically said is better to replace to all stock injectors and see what happened, right??
What level of HP is good for the stock injectors??? can be use until 350rwhp???
Thanks,
Antonio.
What level of HP is good for the stock injectors??? can be use until 350rwhp???
Thanks,
Antonio.
#20
stock injectors are good up to about 300whp at most, I would suggest replacing the primary injectors with the yellow secondary injectors. then use your 550cc injectors in the secondaries and tune it from there, that should have plenty of fuel for 350whp.
#21
Originally Posted by Jon
stock injectors are good up to about 300whp at most, I would suggest replacing the primary injectors with the yellow secondary injectors. then use your 550cc injectors in the secondaries and tune it from there, that should have plenty of fuel for 350whp.
Antonio.
#22
Early RX8 Adopter
Originally Posted by Jon
stock injectors are good up to about 300whp at most, I would suggest replacing the primary injectors with the yellow secondary injectors. then use your 550cc injectors in the secondaries and tune it from there, that should have plenty of fuel for 350whp.
#24
Originally Posted by Jon
i'm about 95% positive that whoever installed the injectors did not put them in the primary's because RC injectors are too wide to fit in the primary location due to the casting on the center plate. So what i think is happening is, either they left the stock injectors in the primary's or if they were smart they would have swapped them for the larger secondary's which do fit in the plate. This being said you are probably running out of injector at that rpm and the secondary's are engaging too late.
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