A few questions about fuel system and N/A tuning
Joined: Jul 2007
Posts: 983
Likes: 14
From: Lone Tree, CO
A few questions about fuel system and N/A tuning
I was wondering if the stock fuel system(injectors, pump, rails, regulator) are sufficient for a decent amount of N/A mods?
Right now I have skunk2 5/8 spacer, ztube, greddy drop in filter, xerd longtube hearders, and HKS single 3" custom exhaust
I am thinking about getting an SAFC2 like nismoG if it would do the job, or an uprev osiris. Would I need to upgrade anything in the fuel system? and also would these provide sufficient fuel tuning for my purpose?
Also I am considering nismo s2 cams in the future possibly. (which with I would use a utec at that time)
Thanks in advance!
Right now I have skunk2 5/8 spacer, ztube, greddy drop in filter, xerd longtube hearders, and HKS single 3" custom exhaust
I am thinking about getting an SAFC2 like nismoG if it would do the job, or an uprev osiris. Would I need to upgrade anything in the fuel system? and also would these provide sufficient fuel tuning for my purpose?
Also I am considering nismo s2 cams in the future possibly. (which with I would use a utec at that time)
Thanks in advance!
Photographer
Joined: Nov 2002
Posts: 5,050
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From: St.Pete, FL
I can't think of any NA VQ's that have required additional fuel system mods.
That might change with a stroker kit, but, short of something that increases engine size, I think the OEM fuel system is good enough for NA cars.
That might change with a stroker kit, but, short of something that increases engine size, I think the OEM fuel system is good enough for NA cars.
Registered User
Joined: Dec 2003
Posts: 2,514
Likes: 5
From: Marietta, Georgia
Since oem runs over rich to reduce piston temperature and knock at WOT and most ecu retunes lean A/F to remove safety and increase power [temporarily], there would always be enough fuel reserve for 20% more air flow into engine.............very few aftermarket mods increase air flow much maybe 5-10% in combination at best.
As to spark is not 33,000 volts enough, assuming oem sparkplugs properly gapped and clean.
As to spark is not 33,000 volts enough, assuming oem sparkplugs properly gapped and clean.
Last edited by Q45tech; Mar 24, 2008 at 03:44 PM.
Originally Posted by Q45tech
Since oem runs over rich to reduce piston temperature and knock at WOT and most ecu retunes lean A/F to remove safety and increase power [temporarily], there would always be enough fuel reserve for 20% more air flow into engine.............very few aftermarket mods increase air flow much maybe 5-10% in combination at best.
As to spark is not 33,000 volts enough, assuming oem sparkplugs properly gapped and clean.
As to spark is not 33,000 volts enough, assuming oem sparkplugs properly gapped and clean.
Correct?
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As far as the fuel system - is concerned, it will work for just about anything NA up to stage 2 cams. It will even work for up to about 385-400HP FI.
As far as spark - there is always benefit to better and more stable spark. The better the burn, the better the power and smoother the acceleration, regardless of what the ECU may adjust for. The better the spark up high, and anywhere for that matter, the more timing and better performance any tune will bring you.
Rick
As far as spark - there is always benefit to better and more stable spark. The better the burn, the better the power and smoother the acceleration, regardless of what the ECU may adjust for. The better the spark up high, and anywhere for that matter, the more timing and better performance any tune will bring you.
Rick
Originally Posted by ISMSOLUTIONS
As far as the fuel system - is concerned, it will work for just about anything NA up to stage 2 cams. It will even work for up to about 385-400HP FI.
As far as spark - there is always benefit to better and more stable spark. The better the burn, the better the power and smoother the acceleration, regardless of what the ECU may adjust for. The better the spark up high, and anywhere for that matter, the more timing and better performance any tune will bring you.
Rick
As far as spark - there is always benefit to better and more stable spark. The better the burn, the better the power and smoother the acceleration, regardless of what the ECU may adjust for. The better the spark up high, and anywhere for that matter, the more timing and better performance any tune will bring you.
Rick
Originally Posted by OCG35
okay - so after market ignition system would be beneficial?...
Last edited by SDGenius; Mar 24, 2008 at 07:15 PM.
Originally Posted by usmcmark
YES, i've got the HKS DLI-II and i'm all N/A. love it, better response and stays strong at high RPM. ur OEM system dies out at high revs by w/an ignition amp you can still pull strong well into 100mph+. plus there are less misfires, if any.
HKS is what I have been considering... are there others that would be worth looking into? I need to search the 350Z forums, but this thread just lent itself to the info.
Thanks for the responses...
long drive