apneablue

I always said I would never start a poll and be a total noob but here I go! (i'm not even sure I am doing this right)

I am just wondering what are some of the reasons why you chose to go non-sequential. Please feel free to elaborate on why you chose the option you did and if you are happy with the outcome.


I don't believe there was a post like this already but if there was then point me in the right direction and shut this baby down.

vudoodoodoo

Clean up the engine bay.

pp13bnos

iTrader: (1)

Minor boost issue for me, and read about 3-4hrs worth of threads with people having boost issues. Looked at the rats nest, and decided that I was'nt going to be putting it back in there. I'm totally happy with my choice. But if it ain't broke...don't fix it. Thats my opinion. CJ

meddle

Boost issue

large_x7

iTrader: (1)

Had boost issues and couldn't solve them. Did ghetto Rikki-style mod first. Lag is noticeable but not terrible, but I will re-evaluate after I get my (RB) exhaust, (M2) intake, and PFC installed. Then if I still like it, I will do it "properly" this fall/winter. I agree with pp13bnos, though, "If it ain't broke, don't fix it!"

dubulup

I had no problems with seq. except my tires (plenty of rubber potenza) kept braking loose in 1st, top of 2nd and 3rd. I felt way out of control during transition. Started hose job saw the rats nest and said HELL NO!

Went full non-seq with reblueprinted ceramic coated twins (pre-control welded shut), tkt cai & pullies, efini y, pfs smic, eleminated dt, dp, main cat, and racing beat cb. 10psi non-seq pulls HARD all the way to 8k. Builds to 10psi around 3800-4000. I LOVE it, I feel way more in control; my tires will still try to break loose at the top of 1st and 2nd...but don't. There is lag, you learn to drive different and the lag is no problem. Engine bay is way simplier. All I can say is SOLID!

artguy

i went non seq because i was frusterated with some seq boost issues and thought it might be worth it.

I couldnt stand the lag....Im now back to sequential.

everyone said non seq wasnt laggy....but i found out differently...waiting til 3800 rpms for boost was nasty.

long live sequential!!





j

racerfoo

boost issues...couldnt figure it out so i just went non-seq. turns out i just didnt have pills in my stock lines...but i like it so much better that im never goin back

bploz RX7

I never had a problem w/ seq. set-up and I loved it... but I got the BNR stage 3's and was told by Bryan that at the transition the boost and torque would drop to much which is way he suggests non-seq. Car is not done yet so I guess I'll just have to see .

jpandes

I was a noob with boost issues. This was an easy way to get rid of them. I still miss the seq. set-up. I don't like the lag associated with the Non-seq set(max boost13psi by 3800 rpm). However, I do love that fact that I get max boost when and where I want it. The power delivery is very smooth and linear.

BTW, At what RPM do the BNR stage 3's build max boost? I'm thinking about getting a set...

jimlab

I went non-sequential three months after buying my car new, so obviously I had no boost problems or vacuum line issues. I drove a friend's non-sequential car with mods, and that's all it took. 4+ years before Rikki.

If you didn't have boost until 3,800 rpm, then something was wrong with the conversion. With the exhaust manifold ported, a manual bleed valve, and no cats, I was hitting full boost (14-15 psi) by 2,800-2,900 rpm. With catalytic converter(s), I can see not being able to make boost until later, or especially with an automatic, but there's no excuse for a 5-speed with a full aftermarket exhaust if the conversion was done right and the turbos are in good shape.

I've ridden in four and driven three non-sequential FDs and none of them (all were converted by Trev and/or I) had a problem making full boost early in the rpm band.

artguy

well ive yet to see a non seq dyno sheet with the power down low of a sequential set.

j

bploz RX7

I agree w/ Jim... you should be hitting decent boost well before 3800 rpm's unless you are running w/ very restricted air flow (i.e. exhaust) or improper tuning. I was told to expect 10 lbs by 3000 rpm and 18-20 lbs by 4000 rpm w/ the BNR 3's. I'll give my results in a couple of weeks after everything is broken in and tuned .

jimlab

What's your definition of "down low"? No rotary makes significant power below ~2,500 rpm, and non-sequential obviously makes more mid-range power with the same potential for peak power as a twin setup at higher rpm.

http://www.micromanx.com/goble/rx7/p...3/compare.html

artguy

right now I get 16psi by 2800 rpms on my primary

dubulup

Holy Cow!!!

and your tires have no problem handling that???

dubulup

Stock twins, w/ main cat.

jpandes

Ok, So what can my problem be?

My mods are: M2 Stage III ECU . Custom Cold air intakes w/ K&N's . M2 Large/Race Stock Mount Intercooler . 3" SS Downpipe . N-tech Hi-flow cat . HKS Exhaust . Non-Sequential Stock Turbos @ 13 PSI . Home Depot Boost Controller . HKS Twin Power Ingition Amp . M2 Coil Overs . Tokiko 5 Way Adj. Struts . Pettit Front Sway Bar . Tri Point Rear Sway Bar . 18" AB-Flug Wheels . B&M Short Shifter . Home Depot Torque Brace . Supra TT Fuel Pump . Autometer Boost Guage . Hawker Odessey PC 980 Mini Battery . Home Depot Grounding Straps . Petit AST . Lightened Flywheel . '99 spec Lip . HID Conversion kit .

Sorry, I pasted it that^

I could have sworn that I read that most people were get 3600-3800 rpm max boost after doing the rikki Non-Seq. conversion.

jimlab, Do you know where I can get a write up on how you did the conversion. Perhaps there's a major difference.

I'm tempted to post a thread asking @ what RPM do the Non-seq guys get Max Boost...

artguy

decent boost to me by 2800rpms is full boost.

jpandes

I agree.
I can't be the only guy with this sort of Non-seq lag...

jimlab

I didn't read through it to make sure that it was identical to the method we used, but Trev's write-up (and a lot more information) is available here: http://www.scuderiaciriani.com/rx7/non-sequential.html

SPOautos

boost doesnt give you hp....airflow does. If you have twice as much turbo going (as in non seq) then you dont need as much boost to make the power.

Artguy - running non seq I pretty much match your rwhp at around 3700rpms and thats with no tuning at all in those lower rpms. Then at that point my rwhp takes off and yours is fixing to die into transition. I honestly think with your bb turbos and just a little tuning down low you'd make just about as much power from 2500-3500 as you do in seq plus gain a lot from 3500-4500. Might be worth a try to do the Rikki conversion and see now that you have the bb turbos. Course the Rikki conversion isnt as good as the full since you keep all the doors and crap in there.

STEPHEN

jimlab

BTW, porting the exhaust manifold and complete removal of the pre-control gate may account for some if not all of the difference. I've heard of a lot of people having the gate welded open or partially open lately, and we eliminated it completely, tapped the hinge/shaft hole and installed a cast iron pipe plug to close it up.

GoRacer

iTrader: (2)

^ Jim, any write on where/how much to port the exhaust manifold (did you heat coat?) and did you also port the turbo manfiold to match? ...also assuming the wasegate was ported.

kwikrx7

If non-seq can be tuned right and the full conversion is done with cutting out the door, you can have full boost but low 3Ks. I had full boost (13 psi) by 3300 rpms with the stockers with full non-seq and it pulled hard to redline. I enjoy driving around on the primary hard through town with sequential - makes it feel like a 400+ hp car but I can tell seq falls on it's face close to transition where my non-seq were pulling hard. It's a different power delivery but I believe that non-seq has quite a bit more midrange power than seq. I seq and non-seq with both stockers and upgraded twins and enjoy seq more.