vortech FAQ: read this before asking vortech questions
this sucks
yes i completely removed ssbox, and cog belt and heres a vid of the boost and air/fuel guage at idle, i do still have in line vortech and fmu hooked up
http://www.youtube.com/watch?v=qRHxZTE69zU
watch how slow it goes lean after i tap gas.
http://www.youtube.com/watch?v=qRHxZTE69zU
watch how slow it goes lean after i tap gas.
its not the sensor...the car idles horribly when it runs lean and bogs when its running lean..and sometimes it clears up and read correct a/f at idle and driving and it idles right and drives right when it does.
ok i have problem thats been goin on two weeks, mabye one of you can help me out, car started stumbling at idle and bogging when given gas thru gears but does magically go away at times...a/f goes 17+ then off guage...at first it would clear its self up and run fine, but its gotten to the point that i cant drive car, if i do it will act up more then run right, at cold start it starts right up everything looks good, once warms up and idle gets to around 1k it starts stumbling and a/f slows goes up 14..15...16....17 car almost stalls, then it catches itself revs and does it over again...i had one guy over that had 12000 scanner and there were no codes and he thought it was plugs or throttle body since he couldnt get a reading on tb test, i changed both and no luck, brand new plugs and tb with sensor, any ideas?
vortech 3.12 tuned on ssbox, has been running perfect for over a year.
oh and it will clear up on occasion but comes back
vortech 3.12 tuned on ssbox, has been running perfect for over a year.
oh and it will clear up on occasion but comes back
I had a similar-ish problem with a part throttle lean spot, see here:
https://my350z.com/forum/forced-indu...0-3500rpm.html
Worth swapping out the front o2 sensors and trying that, it seems to have worked for me. Remember to reset the ecu after, and give it a good 50 miles of driving to re-learn.
So, I hate to revive this thread, but I don't want to feel like I am high jack another thread. Anywho, I spent alot of last night reading this thread and threads that were linked in there. What I came up was the formula for calculating impeller speed. and this is what I came up with for me
So, doing the math, the ati pulley(6.78/3.33) pulley, (32/28) for the cogs, (3.54x7000)rpm=57,667, which is almost 4000 about a V3 SCi trim's max. Binder kinda already chimed in a bit on 4shizzle's thread about this and I am wondering just how far you can safely push them, and how hard it is to get the better bearings and install them.
I currently have a Fully built DE motor with 11:1 compression, JWT C8 cams with springs and retainers. I have an ATI pulley, rev-up oil pump, LTH's and a crappy knock off hks exhuast and everything is forged internally. I plan on putting on a Vortech supercharger on in the future, and I knew turbo maps, and I was happy to learn some of the supercharger math. I am going to run a 3.33 pulley, and if all goes well, I will get the 928 impeller and bearings and run a 3.13 which will be about 62k RPM on the impeller. I do have concerns of pushing the engine with a supercharger with 11:1 compression, but stock compression is not that far off and it is all forged in the bottom end, not the crappy stock rods and pistons. So, I am not too afraid of busting a rod. It isn't like I am going to run a T-Trim maxed out!!
SO, is there anything else I should know or any advise anyone would give about my future set up? (I know I don't have parts for fuel in here, and I will be tuning with uprev)
So, doing the math, the ati pulley(6.78/3.33) pulley, (32/28) for the cogs, (3.54x7000)rpm=57,667, which is almost 4000 about a V3 SCi trim's max. Binder kinda already chimed in a bit on 4shizzle's thread about this and I am wondering just how far you can safely push them, and how hard it is to get the better bearings and install them.
I currently have a Fully built DE motor with 11:1 compression, JWT C8 cams with springs and retainers. I have an ATI pulley, rev-up oil pump, LTH's and a crappy knock off hks exhuast and everything is forged internally. I plan on putting on a Vortech supercharger on in the future, and I knew turbo maps, and I was happy to learn some of the supercharger math. I am going to run a 3.33 pulley, and if all goes well, I will get the 928 impeller and bearings and run a 3.13 which will be about 62k RPM on the impeller. I do have concerns of pushing the engine with a supercharger with 11:1 compression, but stock compression is not that far off and it is all forged in the bottom end, not the crappy stock rods and pistons. So, I am not too afraid of busting a rod. It isn't like I am going to run a T-Trim maxed out!!
SO, is there anything else I should know or any advise anyone would give about my future set up? (I know I don't have parts for fuel in here, and I will be tuning with uprev)
Classy you need to watch for detination.
go big like 850/1000 cc injectors and plan on meth with that compression.
engine at 11 plus 14psi of boost!
hmmm.. becareful.
go big like 850/1000 cc injectors and plan on meth with that compression.
engine at 11 plus 14psi of boost!
hmmm.. becareful.
I plan on running E85, and at least a CJM stage 0, a 255lph, or if needed I will go with an aeromotive and about 850cc injectors depending on how big I need for E85. I have not done any kinda of math for what size fuel pump or injectors I will need. I know alot of guys use 600cc injectors, but with E85, I will need larger.
Def got to have a large set of injectors and watch out... but you should be ok, my Subaru runs 12.5:1 and 12psi on a supercharger and I abuse the ever living FAWK out of it and its held up great so far 
(other had has fingers crossed)
(other had has fingers crossed)
The tune on the car won't be aggressive by any means, but saying that, I also believe I will have a very healthy 400+hp with my car as it stands now. IF the 3.33 works out well, with the 928 impeller and the upgraded bearings, I am excited what kinda power could be made with that on high compression!
Last edited by Classy; Dec 3, 2011 at 01:48 PM.
Deutchwerk (however you spell it) makes a nice fuel pump,300cc I belive, we upgraded my Walboro when we had a weird injector/dirty maf issue.
it flows like a mother!
I didnt start getting the famous tick sound until 100 degrees, 420rwhp, at WOT and high rpms...
thats what started me down the road to bigger injectos more boost etc. etc.
id go with 850 if you "promise yourself" to stay at 400rwhp, but might as well go 1000cc just for a later date, goals, needs.
it flows like a mother!
I didnt start getting the famous tick sound until 100 degrees, 420rwhp, at WOT and high rpms...
thats what started me down the road to bigger injectos more boost etc. etc.
id go with 850 if you "promise yourself" to stay at 400rwhp, but might as well go 1000cc just for a later date, goals, needs.
Last edited by 4SHIZZIL; Dec 3, 2011 at 01:58 PM.
i'm actually thinking of upgrading my fuel system to be compatable with E85 as well, but I'm building a 9:1 motor with turbos, and I've decided that if I do end up going all in that I'm getting the Areomotive 340 pump with 1200cc injectors...
Be sure the look into the injectors though and see if they are E85 compatible, E85 is corrosive as shnit and will mess up some injectors.
Be sure the look into the injectors though and see if they are E85 compatible, E85 is corrosive as shnit and will mess up some injectors.
You really think that my car will only make 400hp with 850cc injectors and e85?? I saw a lot of well set up supercharged cars making about 400hp on a 3.13 pulleys. I think that with the big cams, and the higher compression and all the other breather mods, I will make 400hp pretty easy, it is only 100 more hp!!