[Build Thread] -- Journey to 700+ WHP [Supercharger]

[soill370z]

Originally Posted by Senna-F1

Since my 41 psi was with vacuum line connected and engine running, would the gauge have registered more had I unplugged it? Wondering what effect it has with line connected vs not connected.


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yeah it would have came up a few psi, once you have vacuum on it, it drops a tad. with mine set at 52 , once i connect vac it drops to around 48-50 ish.

[turtle64b]

Originally Posted by Senna-F1

Since my 41 psi was with vacuum line connected and engine running, would the gauge have registered more had I unplugged it? Wondering what effect it has with line connected vs not connected.


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Yes. Your engine operates at a vacuum normally.

There is a piece inside the fuel pressure regulator that moves with changes in intake manifold pressure.

When you set it initially, it has to be a atmospheric pressure to give a good baseline for fuel pressure.

When idling (engine operating at vacuum), the regulator will send less fuel (pressure) to the engine since it does not need as much fuel to idle as compared to driving.

When you really get on it, that piece moves to allow less flow back (more resistance to flow), increasing fuel pressure proportional to intake manifold pressure, ensuring that the engine is getting the correct amount of fuel as pressure increases.

[Zezus]

Those graphics though....

[Senna-F1]

Hey Turtle, I see 50%. But that’s at only 6000 RPM. it will keep increasing with RPM. I do not know if they set pressure with line connected or not. I probably had set mine to 42, line connected, engine off, but pump on by using the app.

Cupcakez, let us know what yours pressures are. Curious.

[Rusty]

Mine is 54 psi at idle on phunk's gauge. That's stock with the RRP kit.

[turtle64b]

Originally Posted by Senna-F1

Hey Turtle, I see 50%. But that’s at only 6000 RPM. it will keep increasing with RPM. I do not know if they set pressure with line connected or not. I probably had set mine to 42, line connected, engine off, but pump on by using the app.

Cupcakez, let us know what yours pressures are. Curious.

That is true. I'll see if I haven't solved the tube collapse to stay on it to redline after the rain passes down here.

[Senna-F1]

Originally Posted by turtle64b

That is true. I'll see if I haven't solved the tube collapse to stay on it to redline after the rain passes down here.

You’ll probably be in the lows 60s at redline. 50% at 6000 and the increase should be linear.

[Martijn_b]

FPR to be set wo vac line connected

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[cupcakez]

Update:

Adel, My mechanic, went to route some lines and adjust the fuel pressure on my car yesterday and ended up fixing whatever the issue was. I still do not completely understand what the issue was exactly, but all I know is that:

(1) The rev limiter is now removed
(2) I do not need bigger injectors
(3) Eugene tested the car today doing a pull on a highway and made 14.5psi at 7500 RPM with the same setup as I previously posted with the dyno sheet post. (Air Filter still on there)
(4) The steering rack is being changed hopefully either tonight or tomorrow night and once that is done, I will go pick up my vehicle, get an alignment done at a nearby Firestone and drive back home with it!
(5) No dyno appointments available this week, so I'll try to get in sometime in February to dyno the upper RPM's with Eugene to get that dialed in and all worked out, also to see what numbers it makes for kicks. I'm guessing at this rate it would make (as Topgunz is guessing --> Around 550 RWHP and a little over 425 WTQ) which is perfect as I do not drive it crazy all the time so it will be fine.
(6) After all is said and done (minus the last dyno bit for the upper RPM's), I can finally enjoy and see my car for the first time in 2020!

So woot!

Huge thanks to Eugene my tuner, and Adel my mechanic for all of their hard work and time put into this vehicle, and a huge thanks to you guys (the Z community) for being so supportive of me thus far and for months to come

[Senna-F1]

Congratulations Cupcakez! I just got my car back tonight. My local installer guy messed up the stage 3 clutch install so SOHO went and installed a stage 4 and fixed it. This, along with a belt tightening got rid of my slight boost drop I was seeing up top. So I’ve got my flex fuel tune done, and a fresh alignment that also got rid of a very twitchy car. Is Eugene going to add traction control to your tune? It would be nice to see what that ends up looking like. Also, remind us again what your filter, pulley, and impeller mods are. I’m not sure what exactly you ended up with.

[redondoaveb]

Originally Posted by Senna-F1

Congratulations Cupcakez! I just got my car back tonight. My local installer guy messed up the stage 3 clutch install so SOHO went and installed a stage 4 and fixed it. This, along with a belt tightening got rid of my slight boost drop I was seeing up top. So I’ve got my flex fuel tune done, and a fresh alignment that also got rid of a very twitchy car. Is Eugene going to add traction control to your tune? It would be nice to see what that ends up looking like. Also, remind us again what your filter, pulley, and impeller mods are. I’m not sure what exactly you ended up with.

He has the V3 Ti blower with the 9lb pulley, 3.00 sc pulley and the stock k&n filter.

[BildoDabbins]

Wow just saw this post and your Z is amazing. Way too many questions,but I'll just ask one lol. I saw you got your exhaust work done at mufflertech in Sac everyone keeps referring me there. There was another nizzy on bags that came into my shop and referred me to mufflertech. How do you like their work?

Do you have exhaust clips?

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[cupcakez]

Originally Posted by BildoDabbins

Wow just saw this post and your Z is amazing. Way too many questions,but I'll just ask one lol. I saw you got your exhaust work done at mufflertech in Sac everyone keeps referring me there. There was another nizzy on bags that came into my shop and referred me to mufflertech. How do you like their work?

Do you have exhaust clips?

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They dont do things just for the money. I've been to MufflerTech multiple times and they charge very fairly. Also, they are very nice and try their best to adhere to customer requests, will also tell you that they cant do something if it's not what their shop offers!

I don't have any exhaust clips unfortunately. The work I had done at muffler tech was on my RED Z before I crashed it and totaled it, the exhaust on my car now is just a stillen full CBE which actually came with the car when I bought it off the lot used.

I'd go to Muffler tech for any exhaust needs. They also do all kinds of custom work too, so the imagination is your limit when going to get work done by them!!

[BildoDabbins]

Originally Posted by cupcakez

They dont do things just for the money. I've been to MufflerTech multiple times and they charge very fairly. Also, they are very nice and try their best to adhere to customer requests, will also tell you that they cant do something if it's not what their shop offers!



I don't have any exhaust clips unfortunately. The work I had done at muffler tech was on my RED Z before I crashed it and totaled it, the exhaust on my car now is just a stillen full CBE which actually came with the car when I bought it off the lot used.



I'd go to Muffler tech for any exhaust needs. They also do all kinds of custom work too, so the imagination is your limit when going to get work done by them!!

That's awesome that you're familiar with them too you're like the 4th person to recommend them now I just need to go there when I get more money after I put new tires on tho...

So are you still in Sacramento?

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[cupcakez]

Originally Posted by BildoDabbins

That's awesome that you're familiar with them too you're like the 4th person to recommend them now I just need to go there when I get more money after I put new tires on tho...

So are you still in Sacramento?

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Been living in Elk Grove since 1998!!
You're more than welcome to check out my Z if you like!