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Skylineusa

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Posts posted by Skylineusa

    Garrett G Series

    in Forced Induction Performance

    Posted

    12 hours ago, robbo_rb180 said:

    G30 660 and 770 at jamboree last weekend. Asked about t3 or t4 housings possibly in the future but only doing vband housings for now. They are a direct bolt on replacement for g25 series too. 

    IMG_20190824_131819.jpg

    So, are they going to be doing the T4? Or did they not answer the question? I sure hope so. 

    Garrett G Series

    in Forced Induction Performance

    Posted · Edited by Skylineusa

    Sorry Lithium, you are correct. I should have gone into a little more detail. I was thinking for quick spool, which I understand by your reply, and looking at the map, would not be a good marriage. It looks like I will wait for the 770s to come out, and go that route.

    Hypertune makes twin manifolds for the G25s, if anyone is going that route. My car is more street than track, so I really do not need that much power.

     

    Adj. Camgears and Low/Mid Power Improvements

    in Drivetrain and transmission

    Posted

    I found some good rules for setting up a cam;

    Advancing the cam gear opens a valve earlier, and closes it sooner... retarding the cam gear, opens the valve later, and closes it later... since all you've done is moved a fixed event.

    Advancing Intake and Exhaust : This will provide the car with more bottom end power, and will decrease top end. Advancing both cam gears will move overlap earlier.

    Retarding Intake and Exhaust : This will increase the cars top end, but will decrease low end. Retarding both cam gears will move the overlap later and but will not change the amount of overlap.

    Advance Exhaust Only : This will help the cars top end, and it reduces overlap.

    Retard Exhaust only : This will help the cars mid range power, very useful for cars with big turbos / big cams. By increasing overlap, It decreases lag significantly. Doing this will bring the boost on all at once.

    Advance Intake only : This will increase overlap and helps the cars bottom end and mid range power. This mod will bring the turbo on all at once.

    The lift has a dramatic effect on low R.P.M. performance, but has a lesser effect at higher R.P.M.s.

    Duration has the opposite effect of lift. The longer the duration, the more the R.P.M. horsepower will be boosted, but it is at the expense of lower R.P.M. horsepower.

    As we all know, it's a bunch of trade offs. What one tuner might think is a good trade off, another will think its a bad trade off. That is when the debates will start.

    Merli, GT-SS ?

    in Forced Induction Performance

    Posted

    I have encountered more setbacks than I care to recount.

    Starting with an ever-growing modlist, which in turn leads to buying the new parts, which in turn leads to unreliable sources, or unavailable parts.

    I should have rods and pistons by mid-May, when the car is going in for the work...

    This is dragging on way too long and it's frustrating the hell out of me :P

    Sorry I can't show you any dyno sheets just yet :)

    Sorry to hear about your set backs.

    I might just be the same boat as you here in a few months. If we start bailing water now, we just might make it:)

    I hope to have mine up and running before the summer is over. I'll post my results for you guys.

    Merli, GT-SS ?

    in Forced Induction Performance

    Posted

    To me when it comes down to who is the fastest in the 1/4, its who has the deepest pockets. My pockets are kind of shallow, so when I take a hit off of the "Go Fast Crack Pipe" a have to look at it a little differently. I want power for a street car, power that will be there without having to rev it to the moon.

    1st thing is increase comp, that has and always will be the easiest way to increase power, of course you have to look at the problems of detonation, but if you are only boosting to 1.1-1.2 and using a higher octane fuel, with a good tune. I see no issue.

    Second is get a turbo that suits your engine. The 2.6 is a fairly small engine, yes it can rev very high, but that induces other issues of longevity. I really cannot see me revving past 7500, ever. Any more than that you are running a risk of something letting go.

    I know the 2530 has been a proven turbo for the RB26, but I think it might push too much volume for the application that I am think about, plus the from the limited info that I have been able to read about the GT-SS will spool a little faster, plus with the slight increase of compression it should be at full spool pretty early in the rpm band.

    Merli, GT-SS ?

    in Forced Induction Performance

    Posted

    I read a thread from a few months ago about installing your GT-SSs, but I cannot find any info after the installation. Were they installed? If so, could you give me a link to what you think of them.

    I just bought a D- Jetro with all the trimmings, now I am trying to decide if I want to go with GT-SS, 2510, or the 2530s.

    I would like a quicker power band than stock, so I was thinking of going to a 9:1 with the GT-SS. I hate lag.

    Thanks for any info you could give me.

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