12leavu

iTrader: (1)

can i do this mod to my car safely or will it max out my stock computer???. only mods are some makeshift intake and a full hks exhaust down pipe back. i do not have a boost controller or even a boost gauge yet. thanks

rynberg

You're going to blow the motor anyway already....haven't you been hitting fuel cut?

12leavu

iTrader: (1)

why would i be hitting fuel cut and why am i gonna blow motor anyways. i bought the car 3 days ago and it has a hks exhaust( still has catalytic convertor) and a rigged up looking air filter set up. was told it has a upgraded fuel pump but haven't seen it with my own eyes. the car is a automatic , unless you hit the hold button it shifts out early anyways. i may be ignorant to these cars right now, but please do not take me as an ignorant individual. i just wana know is it safe to do the nonseq. mod without a boost controller. simple question. thanks

rynberg

When you say you have a full HKS exhaust from downpipe back, it implies you are running a midpipe (no cat). That would be very bad. In either case, you NEED to get a boost gauge ASAP. You should not boost over 10 psi on the stock ecu.

Going full non-sequential will most likely result in slightly higher boost levels. Going poor-man's non-seq probably wouldn't.

12leavu

iTrader: (1)

thanks. the exhaust is necked down to a convertor then back up to the muffler. i found that tonight on a lift. i guess he had to pass emmisions. im gonna try to install boost gauge tomorrow. one more question. i looked under the car at the turbo area, and i searched some old posts, but just to be safe i noticed there is 3 rods and 3 doors. which of these 3 get wired open. i understand you pop off rod and wire them open, but i dont know which door is which?? also in the first part of the post he said he wired y pipe door open and turbo door open. is that ok to do, or do i need to located the y pipe valve and cap it. im just wanting to try this mod out before i ****** all the vacuum lines out.

rynberg

I hope you understand that poor-man's non-seq with a cat and an auto will be a complete DOG in normal driving. I mean minivans will dust you from a dig....

CosmoRx

Agree with rynberg. Auto fds really need the sequential system badly.

bridogr1

I bought an RX-7 a few months ago. It is heavily modded and was switched to be Non-Sequential. I don't spool at all until about 4500 rpms. I read earlier in this post that I should be spooling earlier then that. What should I look for? at? I love the feeling of the kick but would like to be able to get some of it a little lower in the RPM band. I don't like having to dump my clutch off the line.

CosmoRx

After thought I think Im really gonna just try to figure out the sequential problem. Non-seq poorman style isnt worth **** besides if you keep having vac system issues.. You make the same power above 4k as you did with sequential but lose the bottom end. The power you feel poorman style non-seq is very fake in the sense that you think your making a **** ton more power but in reality its just you got zero ***** then turbo dumps and it hauls ***..

12leavu

iTrader: (1)

nevermind i guess. i will search for the simple answers to the simple straight foward questions i asked.

Eggie

Dude, everything you asked has been answered already in this very thread. See post #10 to locate the relevant parts.

12leavu

iTrader: (1)

thanks for post number 10 i looked at that but still im ignorant to these cars.

in the first part of the post he said he wired y pipe door open and turbo door open. is that ok to do, or do i need to located the y pipe valve and cap it.............i just was wanting to try this mod out. if i didnt like it i could unwire it and re -do the vac. lines to the crv and abv. when i looked under the car i noticed three rods going to three doors. what is the 3rd door?

Eggie

Match how the stock system functions above 4500rpm. IOW, wire open charge, pre- and turbo control. Tee the vacuum lines so that CRV and ABV work together. Don't mess with the wastegate.

But IMO, if you don't have the commitment to read a few pages and learn how this stuff works, you should put away your wrenches & pay a mechanic.

12leavu

iTrader: (1)

not an option. ive been reading for 3 nights about this stuff. i actually put the car on a lift, took a look at everything with my own two eyes to compare what ive been reading. there is several different posts about this but they all arent very clear. i was just looking for some additional help. im not one to jump the gun, or i wouldnt of put the car on the ground after checking it out for an hour, leaving it untouched. ive ran into another problem now that i gotta figure out with a boost problem. then i will get back to doing this mod. like i said im just wanting to try this mod. if somebody kills me from a dig with my weak automatic, ive got a LOW 11 sec. 01 vette sitting in the garage i can hop in. thanks for the help. also sorry to hijack the thread, but this thread may help someone like myself in the future

dabigesii

iTrader: (4)

Completed my nonsequential mod today...I like it. Its not bad. I get 5psi by 3000rpm and full boost 3400. It looses traction like a ****. I don't like the lag...but I don't mind it. Thanks for all the help guys.

Rayrx7

Hello guys,
i have a question about the boost control on the second turbo.
I know that the first turbo has the wastgate flapper installed. But how would the spool of the second turbo be controlled?
I will also convert to the full non sequential but this irritate me a little.
Now i control the boost with my Profec B boost controler.

Rayrx7

Hello guys,
i have a question about the boost controlling. How would the boost on the second turbo controlled?
I have the Profec B on the first turbo wastgate installed.
I will also convert to full non sequential,but this irritate me a little.
Then i think the second turbo spools up to no end. Need i an Popp off?

rynberg

I don't think you understand how the seq twins work:

http://www.autosportracetech.com/RX-...erOverview.htm

There are also plenty of threads on how to install the Profec B properly, just search using "profec install".

Rayrx7

yes my Boost was stabil at 12 PSI and i know that my Profec works fine on the seq. setup.
But i would lovely to know how it works technical.
Every single Turbo has an Wastgate,but now we put" two singles" together. How would the pressure of the second turbo controlled? Where vent the pressure of to much boost on the second compressor ?
I look on the pic from you rynberg(thx) and see nothing that gives me the right input.

rynberg

They do not operate as two singles put together. In non-sequential, exhaust gases are fed to both turbines at the same time, both spool up at the same time, and the excess exhaust gas from both turbos exits the same wastegate, which is controlled by a single actuator.

You are operating under the assumption that there are two wastegates and there is only one.

NissanConvert

iTrader: (1)

I read somewhere that someone ported both the primary and the secondary wastegate. What would lead someone to believe that they had done this?

Rayrx7

Sorry rynberg,but there is nothing to tell me that both exhaust gases go through the wastegate. Look on the pic here(http://www.autosportracetech.com/RX-...rOverview.htm)!
And the Precontrol valve is only for prespooling the second turbo.
The charge control valve is for close the way to ic and intake mainfold and the charge relieve valve let the prespooled boost vent to air till it comes to the magic ~3500 U/min. Then all let the boost came together... the first and the second turbo spools together.I know the system. But only this little thing irritate me.

rynberg

Look at the diagram, between the turbines. You can clearly see that the exhaust path comes out from both turbines and joins together into one stream...

twomucboost4u

iTrader: (9)

Cosmo rx:
if you like the sequentials and dont want a whole bunch of lines why dont you just do the simplified version. I did it and its so much easier to trace through now. Took me litterally a whole day to take everything apart and put all the lines on and make sure they where secure and correct. But at least now I completely understand the system and its easier to work on. Just my opinion.

Chris