A&Q about 350Z
Q:
congrats... i would hope that they would do something like that... just because... who is really gonna make a 3.5 in high flow cat? so you'r only option would to be to go with the 2.5 for a street setup without them...
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A:
Good points.
I am really excited about this 3in. exhaust and making it work. Not so much now, but that's important, but mostly for the future.... I think this exhaust will meet my immediate needs and ALL future needs with the 3" exhaust and 3.5 inch test pipes (for drag strip or Summit point,WV) and 3.5 inch extremely high flow catalytic converters for the street. This is a very important piece of the equation for me that I have had a lot of difficulty with! More power and street legal as well. Throw in the new APS extreme performance fuel system and some carrillo H beam rods and arias extreme duty forged pistons and wrist pens...and there you go. Kinda scarey and dangerous, are it not? ....count me in!
Post Edited (Jan 25, 7:35pm)
A:
jeez... from the sound of it... it seems like your working on making a dragster...1000+ HP and that's about what your gonna have... i'm not sure i'd wanna drive it cause i might get addicted...lol...
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Chrome Silver '03 Touring -MT-
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A:
Nah, I've posted before I will have a toggle switch to flip between 2 tuning maps. One map tuned for about 600 engine hp for the street and the other tuned for about 725 engine hp at the drag strip. It would be capable of a lot more, but I don't want to go higher than that as you start breaking axles, differentials and driveshafts somewhere north of that. I will leave the cutting edge for others with bigger pocketbooks but the car still should be crazy fast for a daily driver. And I am going to leave the suspension setup like it is for sportscar handling. So it is not going to hook up at the track like a true dragster. But I want a good handling 350Z sportscar that can also run a pretty quick qtr. mile. Not a dragster trailer queen.
The above strategy is what I did with my HKS stage VI++ mitsu eclipse awd turbo and it turned out great. Considering what it was. Not the best at anything, but a pretty good all around performance car. For the money. My 350Z will be much better than the eclipse IMO because of the low rpm torque and much better throttle response. And a better chassis and suspension. If I am successful. No guts, no glory, ha. My 35OZ is just a more technologically advanced car than the mitsu was. Just like the 996 twin turbo Porsche that my friend with an APS TT 350Z blew into the tall grass. IMO and in his opinion, the Porsche is the more technologically advanced all around sports car. But it is FUN to beat cars like that anyway. I just like to go fast! That is what it is all about. And I just personally love the handling of my 350Z in curves.
Post Edited (Jan 25, 11:08pm)
A:
As usual, phxZ31, you make a lot of incredibly good points. You tend to confuse these issues by applying logic, knowledge, and common sense. ha. It is really neat having constructive forced induction discussions on this website lately. None of us have all the answers since the 350Z is still pretty new to forced induction and the limits are being explored even as we speak. But this makes is an interesting and exciting time for the 350Z forced induction enthusiast.
Your thoughts about the differential are comforting and I thought it would hold pretty good as well. I think you know a little bit more than I do about the differential. And Zazupilot probably knows more than I do as well.
I have heard from several sources that our driveshaft should hold to 800 hp. I don't remember if that is to the wheels or engine hp. (I think it was to the wheels although the power hits the drive shaft before the wheels, ha..) I have a lot of confidence in the drive shaft. Note that I said somewhere north of 725 hp is where you start breaking parts. I am not sure of all the limits myself, truth be known.
Very consistent with your post, even though I failed to mention that in my post, my error, the half shafts are the thing that I am conerned about most handling power over 725. Sharif is running 622 hp to the wheels, forget what torque he's at, I can look that up, and his half shafts are holding up ok so far as far as I know. The halfshafts are definitely my chief area of concern going to 725 hp eventually. I think they will hold up too, but I could be wrong on that and that is an areas I can look into if I weren't so busy at work right now. The most APS TT power I know of personally is being run by a good friend of mine. Greater than 790 hp. - I really need to ask him about those halfshafts. But, I am probably not going to run over 540 engine hp for a while until I build up the bottom end of the engine. So I don't have to worry about all that YET. ha.
Like you mentioned. And as you noted my tranny has been modified a LOT so that is different than your discussions about the stock trannys which I thought were good. And you noted my mods. My auto tranny is designed to handle 600 lb ft torque to the wheels long term. Estimated to handle up to 800 lb ft torque to the wheels. Until I put the TT power to it though, I am just talking... My input billet shaft has been tested ok up to 1300 hp to the wheels so if that damn thing breaks I am boing to be pi$$ed. But my tranny guy says he will replace it free so, what me worry? ha. No guts no glory.
My opinion, which I have stated before, is very consistent with yours: The stock auto tranny WILL NOT hold up to twin turbo power of roughly 400 lb. ft torque to the wheels and above long term. It is torque more so than HP that will kill the auto tranny. We could have a whole thread about the auto tranny as I went through 3.5 months of modifications in anticipation of the power. Whew. I thought it would never end, ha. It was very interesting I am just BSing.
You and others know more about the manual tranny than me, since I am auto, so I will defer to others there.
Post Edited (Jan 26, 7:46pm)
A:
I am an auto Z32 TT at about 400 ft-lbs of torque. I am installing a large hayden tranny cooler this weekend to handle the extra heat - even still, I will probably shred my flexplate as I add power this year.
A racing auto tranny is going to be a must for any 350Z that exceeds that torque.
Post Edited (Jan 26, 7:10pm)
A:
Yes, alang, I am going to toggle between fuel maps. Yes you are very correct, APS recommends not to use the boost controller like you mention and I used the HKS EVC on my eclipse turbo. Yes we should have the engine fine tuned by an APS dealer for each fuel map on a load based dyno. They fine tune this even down to the octane of your local gas and they fine tune the map at 168 points in the engine rpm/load band. This tuning is critical. I talked to Jason in NJ who has been running 11 sec qtrs. with APS tts for something like 70,000 miles with no problemos (his was the first APS 350Z TT kit installed in North America). He and others will tell you fine tuning is a critical key.
I am going to have to look into the the modus operandi of the computer and the fuel maps toggling more before I post on it. The piggyback on our factory ECU is a unichip in the stanard APS TT kit. Tuan at Chi town can do it he tells me. He is so busy I have not had a chance to hold his feet to the fire on all the computer details I need. I had a discussion with another guy that is now doing it (toggling between 2 fuel maps) with APS TTs. I am probably not going to build up the bottom end of the engine for awhile. Until I do I won't be toggling. I'll just be running one map at 11.5 psi fine tuned on the 93 octane APS map. So I haven't looked into the computer aspect yet for the different maps as much as I should. I think I remember, but I'd rather check before taking a chance on posting incorrect info. This is an extremely interesting question. If I get a chance tomorrow, I will call the guy I know that is already toggling and Tuan. I am really pushed right now at work so it maybe a couple of days. Job cuts into my day. ha. If you find out more about the toggling between maps, please post. I am incredibly interested just need to research more. Eventually I want to run on the street on the 93 octane map at about 600 engine hp. And toggle up to about 725 engine hp at the drag strip.
Post Edited (Jan 26, 7:43pm)
A:
Thanks for th info on diffs Zazupilot. Much appreciated. We are sure in agreement on the need for a racing tranny if you have auto tranny for 350Zs on turbos. I said running 400 lb ft torque and over but I really think this is a need for even less power. Like probably any serious forced induction. I just have too many stories about this. The racing tranny is absolutely needed where I am going. That is for sure. I posted a thread a couple months ago on my auto tranny upgrade on this website. So a search on my posts if anybody is interested would get you info on what I did to my auto tranny. It was upgraded all the way throughout.
Post Edited (Jan 26, 7:55pm)
A:
Yeah I remember discussing your tranny modifications just after you had them done. I'm sure you probably won't have a problem there.
But does anybody even know if there are stronger aftermarket halfshafts for the 350Z? I don't even know if NISMO makes stronger replacements. I suppose if you ended up breaking a halfshaft you could probably have a machine shop make custom ones to your own specifications. Custom driveshafts are pretty common mods, I'm sure custom half shafts would be a good purchase down the road.
It is fun to have forced induction discussions. It will be even better once more cars out there use it and there will be less speculation and more actual discussion based on experience. I can't wait to start throwing cash at my car again. I'm almost fully recovered from Christmas now, my next purchases will be to overhaul my suspension, and from there everything goes into the turbo engine.
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1985 300ZX n/a
A:
i just gotta find a better paying job...in the process right now...lol
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Chrome Silver '03 Touring -MT-
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A:
I gotta get my last kid thru college without bankrupting me like the first one did!!!!! (Kids are fun, though.)
A:
Wow your kids are lucky. I gotta pay for my own college (which is another reason why working on the car is so slow...)
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1985 300ZX n/a
A:
How much do I have to pay you to say this to my kids????? I will buy you a real nice dinner at the very least, ha. Maybe they will listen to you, ha. Nah they are good kids. He does have some loans to pay off as well as me. But NOT like the one I have!!!! And that was after paying tens of grand out of pocket that is not on the loans. Kids are worth it though. My son has now been accepted into 4 dental schools for next fall! I am so proud of him that it almost overpowers the agony of the loans. It only hurts now when I laugh, ha..... Oouch!
A:
Hey alang, regarding your question about the use of a toggle switch to run 2 different tuning maps on the APS unichip with the APS TTs:
I wanted to talk to one of the better APS tuners to see if anything has changed (since I last spoke to him) and to make sure I said it right. Before posting this info. OK, the guy told me that yes, he does run 2 tuning maps right now and yes they are stored in memory in the standard 350Z APS TT unichip engine management system. (The unichip can store up to 2 but no more than 2 tuning maps he said.) BUT....right now anyway....the 2nd map does not include the ability to alter the boost psi compared to tuning map 1. So it is of limited use - right now. Read on as that is about to change. You can run more aggressive timing he said on map 2, and maybe other changes, so like if you plan to run 105 octane gas at the drag strip and more timing. But no boost psi changes... for now. Read on for the good news.
Now having said all of the above, he did say that it is estimated that within the next 6 months we WILL be able to save two different tuning maps in the APS unichip that DOES include a higher boost psi as well as changes to all the other tuning parameters. In other words, 2 complete tuning maps including higher boost. And the ability to toggle back and forth. He said that is being worked on right now. Like I said in one of my recent posts, this (forced induction and 350Zs) is all evolving and being worked out as we go. Not like the Z32 TT that has well over a decade of tuning knowledege and experience. The guy I spoke to though is not just some guy with an APS TT. This guy is one of the better APS turbo tuners in the U.S. He has lots of years of turbo tuning experience including other makes of cars.
And this guy has over 30,000 miles on his APS TT 350Z that makes 430 hp to the wheels on the crappy CA 91 octane gas. That is on stock 350Z engine internals. So he does have experience with APS TTs on 350Zs including his car and many kits he has installed and tuned. He says that currently, with the more aggressive tuning map #2 (that right now does NOT include higher boost...yet) at the drag strip and on 100 octane gas, his APS TT 350Z makes 500 hp to the wheels. Or about 602 engine hp. He has over 30,000 miles running his APS TT 350Z with no problems, hard driving, and many track events.
I do think we are light years ahead of where we were even 2 years ago with 350Z tubo induction! But it is still a work in progress.
Post Edited (Jan 27, 5:19pm)
A:
still NOT paying for my student loans... i'm suppose to be paying but i...just don't feel like it... heh...
but hey...MP i gotta pay for mine too...although my dad signed for them...
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Chrome Silver '03 Touring -MT-
C.F. Nismo Wing
Shorty Antenna (Stolen!!! Thanks alot!)
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A:
Dental school eh? Thats pretty cool! I'll finally have my biochem degree in another year and a half. Don't know what I'm gonna do with it though. I'm thinking research pharmacist at the moment, but my mind changes every few months. We'll see...
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1985 300ZX n/a
A:
Hey staticivi03, my son was once planning to go into the PA school at James Madison Univ. where he got his 4 yr. degree. I think JMU has a master's degree program in PA now if you are interested.
I also work with a PA who is also in the U.S. Public Health Service like me. He got his PA degree paid for by PHS and then you have an obligation to agree to work for us for several years as payback. Might want to talk to him and look into that as far as financing your degree. Saved him megabucks. PHS are commissioned officers (same rank/retirement as regular military) in a medical corp that is part of the military establishment, but we are under the U.S. Surgeon General and Dept. of Health/Human Services. Rather than Dept of Defense. As such...since we are not an "armed" service, we do not have to go through military basic training or officer training school. It is a direct commision. I used to be in the Air Force and went through basic training under a Marine Corp D.I. who tranferred over into the Air Force. OmiGod, believe me, you don't want to go though basic training like I did if you can avoid it. 6 weeks of pure hell!!!!!. Tough love, but without the love, ha. A direct commission is mucho easier. This is good for people who might want to be commissioned officers in the miliary, but had rather be in a medical corp and not have to deal with the "armed" part of the training and potential combat sevice. We deploy at times but it is for things like the Katrina hurricane relief - so we do have a positive role and do do a lot of good. You know, the Centers for Disease Contol (CDC) and research into AIDS is under PHS. National Institutes of Heath (NIH) in Bethesda, MD, and the EPA are under PHS. It is just not in an armed combat capacity. Just a thought. I paid back 2 student loans of my own and now wish I had known about this earlier and had my schooling paid for by Uncle Sugar. But I do everything the hard way, ha.
Post Edited (Jan 28, 12:30pm)