rx7will

iTrader: (6)

Anyone know of a good website that describes how to convert the stock sequential turbos to non-sequential. When does boost come on for the non-seq and does the car pull harder at the high end as compared to the sequentials.

spooledUP7

Anyone feel like playing hangman? I'll start.

S _ _ r _ _

Just kidding. Actually, I don't personally know, but if I were wanting to know I would search the forum under non sequential. Good luck

black99

here's a little on how to do the "poor mans version" and use search for the rest..

http://www.rx7turboturbo.com/robrobi...other.htm#Poor Man’s Non-Sequential Turbo Mod

kwikrx7

depending on how modded you are is when you'll have full boost. If you're close to stock then probably 4200-5K rpms I have streetport, dp, hi-flo cat, cb, and flywheel and get full boost by 3200 rpms. I think stock sequentials have full bost by around 2800 rpms - there is a little lag but will pull harder in midrange as both turbos are online earlier than sequential (depending on your mods) - top end is the same

7-sins

Non-Sequential has been working fine for me. I sure do love not having to deal with all the control issues.

billvp

what gear are you all talking about getting full boost by 5500 rpm in, and how much boost are you talking about?

rx7will

iTrader: (6)

Whats the most power a stock motor with non-sequential turbos can produce, lets say the car has full exhaust, fmic and the car is tuned for 14 psi of boost. Because that is what my car will be, i just wanted to try to max out the stock stuff before i go ported motor and single turbo.

rynberg

How long have you had your car? With only 14 posts, how much do you really know about modifying FDs? Are you sure you just want to jump right into making big changes to the car? A single turbo is not for everyone. The power curves I've seen are huge but there is nothing down low at all. Not very streetable in my opinion. (strapping flame suit on...)

At this point, I never see myself ditching the stock twins. I plan on adding a cat-back, intake, SMIC, PowerFC, and running on 12 lbs of boost. I think once I reach that point, I will be completely done with power upgrades. I think that most people that have gone single have had their cars a while and have gone through the upgrade process over time. Oh well, it's your car.

BTW, running 14 lbs on the stock twins will probably fry them pretty quickly.

redrotorR1

not to be a ****** (instead of a wankel), but the stock twins can handle up to 20psi ... however, the 13B all by its lonesome without any help will probably be the first one to fry @ 14psi. but there's a point to be made; running full exhaust should gravitate you towards upgrading the ECU ... don't be a bonehead. _EA_CH ...

rynberg

Really? I bet a LOT of people on this forum would call you on that one.

7-sins

I run 14 psi at times... from what I have heard 16 psi is reliable with the proper mods. 18 psi is max safely but will extremely shorten the turbos life. That is just what I read on the forum, I could be wrong.

daze

iTrader: (8)

most I've seen was 15psi on stock twins. Im also planning on going non-sequential.

artguy

any of you boys run fifteen pounds of boost and I would suggest having a few grand in the bank for either a new set or the upgrade. your ***** will be melted and leaking and smoking faster than you can make money. the excess heat will probably damage your side seals as well so start looking for 3mm seals and a good deal on some rotor housings.
you dont have to learn the hard way ya know...

and to the guy that thinks he can run sixteen pounds or eighteen pounds on stockers...hahaha..I wish I was your mechanic. Id prep a spot for ya and let my bank know that I was going to be making some large deposits.



do some research guys...anything more than stock will significantly shorten the life of your stock turbos...anything over say thirteen pounds will simply melt those little suckers to pieces in a very short time. the heat is tremendous and they simply were not build to handle high boost levels. oh they might work for a while..but when you finally pull them off and the wheels are broken to pieces from brittleness and heat damage (see engine damage after that) and your interior smells from all the burning oil...... then you may find that it was not such a great idea.

not to mention anything over fourteen pounds and you are risking running lean and blowing that little motor. you need a total fuel system upgrade as well as an ecu upgrade to handle such a thing.

if you can afford it...and ya are up to destroying a good car...go for it. have fun..Im sure it will be a blast.

jason

kwikrx7

The stock twins can run 15 psi as long as the car is tuned for it and there is plenty of fuel. If your motor was built for a streetport, oil port, and coolant port with silicone seals and o-rings over the stock rubber, and upgraded apex seals then you can run higher boost safely. Even the stock 2mm can handle high boost but just not as long. I'd say 12-13 psi is the limit for stock twins as far as reliability and length of life. I've been running 13 psi on 1 turbo (other's blown) for a while and all's ok. Tuning is very important if you want to save your engine at higher psi. Going non-sequential can help eliminate nasty problems with the stock sequential system (which will occur eventually whether you like it or not) You have to do the full conversion properly or you won't see the benefit. getting full boost by 4-5K would suck IMO but if you have the proper setup then you can pull past a similarly modded FD that's sequential. Dynos have proven there is more hp available in the 3.5-6K range with non-seq.

rx7will

iTrader: (6)

Thanks for all the info guys. I just recently bought my FD, but that doesnt mean i dont know anything about the car. I had a TII for 3 years and have rebuilt a few motors and i have lots of experience on working on FDs also. I'm also a mechanic so i do know what i'm doing. When i had my TII it ditched everything under the hood that i possible could. The reason i want to go single turbo is because it is simple and easy to work on. And i can get the manifold from the previous owner for cheap and also get the turbo for cheap. I most likely go with a 60-1 which xs-engineering calls the to4s. I bought the car with most of the following mods:3" dp, mp and catback, 20b fuel pump, apexi power fc and commander tuned for the car, al. radiator, koni shocks, M2 cold intake, M2 trailing arm and toe links, and some other stuff. I would have had to spend my money on theses parts, but since it came with the car i can use that money for the single turbo. And oh yeas, i have a spearco intercooler that i need the get piping made for it. The car is a blast to drive. Later. Will

Man-Chun

Can't the newer 99-00? turbos take more boost?.

Chun.

kwikrx7

The 99 and newer turbos are definitely made better and much more efficient than the 93-95 turbos. the secondary is a bit larger and I believe it put out about 10 more hp over older turbos. i'm sure they can handle higher boost for longer periods of time than 93-95 turbos.

justin

I run 13.5-14lbs.at the drag strip only.Cut it back to 11 for street. I always let the turbos cool and run
96 octane for high boost.So far no problems at all.I think it makes a big difference if your running high boost
all the time on the street. Stock eng.,injectors and turbos(running every possible bolt on upgrade profec b,ecu ect.) I am still running stock seguential system and running 116 trap speeds.
Would I benefit from a mod to non-sequential ?