Hey guys...I'm on to engine upgrades and I have a few questions
For the intake plenum...is there an aftermarket higherflow one available, should I just clean up and bore out the one I've got, or custom build one? In addition, are there any gains to be had from boring out the throttle body?
What kind of hp gains and gas mileage drops should I expect from a JWT ecu? Or should I go with an e-manage unit from Greddy?
Would I benefit from JWT cam shafts in a NA engine?
Is a lightened flywheel a good thing with an automatic?
Do they sell a lightened pully that is not underdrive?
Would high flow injectors be necessary in an NA setup or would stock suffice?
Sorry for the barrage of questions...but after doing some research those are what I came up with. Thans for any help.
On to engine upgrades...
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blackmax23
- Posts: 163
- Joined: Tue May 29, 2007 7:20 am
- Car: 1999 Nissan Maxima SE-L
Re: On to engine upgrades... (rxm6)
I'm not too sure about the first two questions of yours, but I can answer the rest.
As far as the ECU goes, no matter which ecu upgrade you go with, you'll more than likely see a 1-3 mpg drop, unless you have a genius of a tuner. You'll see gains from 8 to as much as 15 to the wheels with a good quality ECU upgrade, though.
With camshafts, yes you can benefit from it with an n/a engine, however, it's all about what your wants and needs are. If you go with a steeper lobe camshaft, you will lose a little on the bottom end, but you will see a pretty good improvement in the mid-range and top end. But once again, you need to get it tuned correctly, or your idle will be unbearable and you might stumble a lil at first until the computer recognizes the change.
No such thing as a flywheel in an automatic, torque converters is what transfers energy from the engine to the wheels.
Yes, they do sell a lightened pulley that isn't underdrive and I would recommend that over the underdrive cuz I've heard some stories of how after the UD pulley was installed, my boy's sound system was weaker, a/c wasn't as good, and it's really not that great to underdrive the alternator, so I would stay away from underdrive. You'll see a possible 5 hp free up from the lightened and maybe 8 with the underdrive, so it's not that big of a difference and it's not worth the headache. Check Unorthodox Racing for their lightened pulley.
High flow injectors won't be needed with a bolt-on setup that I think you're going for. Unless you're planning on stroking the engine or putting higher compression pistons in, your stock injectors are plenty sufficient. You'd get nothing out of bigger injectors, other than a lot of bogging down and real rich a/f mixture!
I hope that helps!
As far as the ECU goes, no matter which ecu upgrade you go with, you'll more than likely see a 1-3 mpg drop, unless you have a genius of a tuner. You'll see gains from 8 to as much as 15 to the wheels with a good quality ECU upgrade, though.
With camshafts, yes you can benefit from it with an n/a engine, however, it's all about what your wants and needs are. If you go with a steeper lobe camshaft, you will lose a little on the bottom end, but you will see a pretty good improvement in the mid-range and top end. But once again, you need to get it tuned correctly, or your idle will be unbearable and you might stumble a lil at first until the computer recognizes the change.
No such thing as a flywheel in an automatic, torque converters is what transfers energy from the engine to the wheels.
Yes, they do sell a lightened pulley that isn't underdrive and I would recommend that over the underdrive cuz I've heard some stories of how after the UD pulley was installed, my boy's sound system was weaker, a/c wasn't as good, and it's really not that great to underdrive the alternator, so I would stay away from underdrive. You'll see a possible 5 hp free up from the lightened and maybe 8 with the underdrive, so it's not that big of a difference and it's not worth the headache. Check Unorthodox Racing for their lightened pulley.
High flow injectors won't be needed with a bolt-on setup that I think you're going for. Unless you're planning on stroking the engine or putting higher compression pistons in, your stock injectors are plenty sufficient. You'd get nothing out of bigger injectors, other than a lot of bogging down and real rich a/f mixture!
I hope that helps!
Re: On to engine upgrades... (blackmax23)
I'm not going for a strict bolt-on. I would like a well tuned NA engine. I think down the road, once I get my other car in good working order, I will rebuild this engine with lightweight pistons, and lightened this and lightened that. I have a whole list of things that I want to do...but if they don't make the parts then I will have to get them custom made. I'm a nut and I like doing weird stuff...like seeing how much whp i can scrape from a NA VQ30. I'm going to hypothesize somewhere around 300whp and 280 lbs/ft.blackmax23 wrote:High flow injectors won't be needed with a bolt-on setup that I think you're going for. Unless you're planning on stroking the engine or putting higher compression pistons in, your stock injectors are plenty sufficient. You'd get nothing out of bigger injectors, other than a lot of bogging down and real rich a/f mixture!