Montego

iTrader: (1)

mindless comments? Son you have me confused with a newbie.

I have talked extensively to Brian (yes Brian the guy who made YOUR turbo) about non sequential boost threshold. Guess what he said 3800... But I guess he was just making a mindless comment. In reality very few actually achieve a boost threshold below 3800 RPMs, nevermind the lag.

I had a perfectly working sequential system. Except that once every few months I had to go in digging for an issue. So I tried out the whole richman's non sequential. Soo many people claimed "with the right mods you should spool at 2800 or at least 3000 RPMs" I thought I give a try. So try this on for size... M2 CAI, PFS SMIC (short piping), Mild streetport, DP, MP, CB, Lightened flywheel, and YES PORTED TURBOS... drum roll please.... 3800 RPM boost threshold. Funny that coincides with what b said. But yeah neither he, my mechanic, nor I know how to do the job right. I speculate that the good boost threshold has to do more with wednesday turbos than anything. But it's just speculation.


I'm here to tell you that boost threshold of 3400 RPMs sucks. I hit full boost at 3200 RPMs with my GT35R. I attribute that to having a short manifold, using a SMIC, and having a turbo in decent condition.

I don't doubt SOME people have. But I have YET TO MEET one that does. I've heard it many times on the forum people making that claim. But living here in california where most of the FDs are at, I haven't met one yet. You can count in my 12+ years of ownership in my search. Guess they are all in the forum posting...

Fact is if it was as easy as you claim, it wouldn't the white rhino that it seems to be.

Well given that I spool quicker and have a higher CFM than you I say otherwise. Besides you are generalizing too much Mark. Not all single turbos are the same and should not be lumped together in one statement. I figured a guy who has been in the forum for as long you have wouldn't make that mistake.

no_more_rice

Stage 3s...I have Stage 2s (last one he ever made)

Good for you, but I doubt it's all that noticeable of a diff

Are they running cats? If so, forget it

The 35R is a good medium size turbo, I was referring to the monsters

dradon03

iTrader: (2)

Poor guy you like arguing with yourself.

I like North Carolina, good people but I wasn't aware that they included B.Eng's in the Cheerios boxes.

On a side now if you think I am a left winger you are in for a slight surprise

serbRX7

iTrader: (9)

non sequential - makes full boost at 4000rpm on primery and secondary turbo at the same time or faster if you remove the cats,bridgeport,exhaust port, shorter ic piping...blablabla..

they still start making boost at 2500rpm

and runing them at 15psi

i do not think that any one would miss stock car feel with new 80rwhp gain

i look at this as reliability mod
it maks turbo more consistent

ptrhahn

iTrader: (9)

^^^

Disagree. People are too obsessed with peak horsepower... there's also torque and power under the curve. My car (with a fairly unremarkable setup) is quicker than many small single turbo cars (particularly out of slow corners) that technically make "more power", and you're not going to be making any 80 more peak hp with a similar nonsequential setup. 20-30 or so maybe.

If someone would develop a high-flow sequential manifold, perhaps for two GT25R's, nothing would touch it.

mikeric

iTrader: (20)

I used to have the RX6 kit on my FD. Extremely fast spool up. For I mild setup, I would recommend that.

Right now, I have a 60-1 T04 built by Brian at BNR in my FB. At 14 PSI, I have 330whp. I would not call it mild by any means, but it is a great setup. I bought a used HKS manifoild and 50mm wastegate on ebay for $300 shipped. All I needed to do was put a stronger spring in ($15) and it works perfectly.

My point is if you shp around and buy used you can find great deals and do the single swap for not too much money.

no_more_rice

Agree...as long as the control system was simple and not nearly as horridly complex, difficult to service, and poorly designed as the FD system. Someone in Japan was certainly on drugs when that cluster was "designed". I could get a sixth grader to improve on it.

ptrhahn

iTrader: (9)

^^^^

My system has been working untouched for five years or so... but I've got the Saxyman solonoids still sitting in a box for when that time comes. Installing them out from under the IUM and some viton check valves is all you really need to do.

serbRX7

iTrader: (9)

at 15psi you should be making around 330 rwhp and stock rx7 only makes 255rwhp so it is a big gain...

we can go at this all day

thing is - sequential setup is unreliable...

one more thing my car will spank your cars any day in corners

KKMpunkrock2011

iTrader: (5)

fyi, the stock FD makes 255 at the crank, that's between 210 and 220 at the wheels usually.

Montego

iTrader: (1)

4K wtf? Daaaam that is a horrible boost threshold... Talk about time standing still jeez.

Have you ever really driven a modded car with a perfectly working sequential system? Doesn't sound like it. It has the pick up response of an N/A car. It hits full boost INSTANTLY and I'm not embelishing it either. After 2800 RPMs boost lag is non existant. No system touches it in boost response. In comparison the fun factor of sequential is >>> than nonseq.

What makes you think that a sequential setup cannot have that 80 HP? Other than the boost spike at the transition state everything should be all good.

The main issue with the sequential system is that MOST people don't know what's wrong with it as these days cars have undergone several owners and those owners have seriously fucked **** up.. But if your system works all you gotta do is every few years just do the whole silicon vacuum job and replace solenoids for reliability. With me: I got lazy and didn't want to do it again so I opted for the non seq because people swore by it and I had all the right mods...

Non seq did have it's nice perks... but the fun factor of the non-seq trumped in the end. BTW yes my car was actually slower sligtly slower due to the boost lag. I judged it by racing my buddy. He had a stock porsche boxter and we have been racing each other since we were kids. From roll races sequentially and at low boost (stock 10 lbs) he never had a prayer. I would dust his *** the second I got on the gas. At 14 psi.... It was a massacre.

Then I went non seq same low boost level. From a roll he would leave me behind by 1 1/2 car lenghts but once I actually hit boost (what felt like 10 years later) I would leave him behind. Same exact outcome at high boost. He'd leave me behind and whener I'd hit boost his *** would be dust. His response to my mod "Why did you do that again?"... yeah good question.




Is that supposed to be a joke? Seriously I can't tell

no_more_rice

I drove the car with stock seq (I bought my FD with 12k original miles - it still had the original tires and battery) for at least six years. Yes, it was fun, but it was also pretty slow and I got beat by plenty of other cars. That doesn't happen now. I would never go back - the car is alot more fun to drive with 360+ rwhp vs 215 rwhp, and keeping the rpm above 3400 is not a problem.

Simplicity is absolutely critical with these cars, heaven knows there is enough stuff to break - when I decided to simplify and uncork the motor, the maze of vacuum lines and solenoids were promptly shipped to the neatest landfill and were not missed. I can actually see the motor and what the heck I'm doing when I work on it. There is nothing more beautiful imo than a clean FD engine bay, stripped of all superfluous street paraphernalia. It's been proven that a properly set-up up track prepped FD with about 350 rwhp can smoke many higher hp cars on a roadcourse, including single turbo Supras. Track prepped = simple to work on

no_more_rice

Try downshifting. This isn't that tough. Again, these cars will never be torque monsters, so if you think you can leave it in fifth and do a roll at anything less than 100 mph, forget it. Believe me, I've rolled many cars in 4th gear - Mustangs, F bodies, Beemer M3s, Caymans....haven't lost yet

Oh and older Boxsters are nothing to boast about, they are toads

ptrhahn

iTrader: (9)

5 years of track use and counting my friend without even touching the "unreliable" system, and that's 345 at the wheels @ 12 psi on track, and my car will get out of corners with Z06's and GT3's, so I'm not buying the spankage claim.

no_more_rice

I find this hard to believe....are you saying you can pull even with GT3s and Z06s out of slower corners?

Montego

iTrader: (1)

really? what a concept!

Come on Mark you are reaching dude. The jump of 1 1/2 car lenghts was due to boost lag, not threshold I specifically stated that in the description. Meaning I'm the right gear and becasue of the lag my friend who is N/A got the jump each and every time.

so therefore you do a modification that decimates boost response in the lower RPMs. Yup that makes sense...

who is talking about fifth? Even in a sequential system one should always be at least 4500 RPMs so both turbos are on line when the hammer is dropped. In a sequential system the boost is instant in a non seq, well you are waiting a little bit. That is unless you brake boost (weak band aid for a laggy system) but good luck brake boosting out of a corner in a track situation.

Please show me where I boasted? Seriously are we reading the same thread? The boxster example was used because it was a DIRECT comparison from before and after a mod. Same cars, same drivers, same circumstances the only difference was my mod.

Edit- It wasn't an old boxster. My comment that we were racing each other since we were kids had no bearing on the year of the porsche. It was to give feeback that we have always done it so ther is consistency. In fact we did it in our teens, then our 20's, and now we do it in our 30's.

fixed.

I alsdo have a few questions:

why where you gettin beaten so much? What mods did you have compared to what you have know? What kept you from modding the car further when it was sequential?

no_more_rice

No, I don't have a problem winning roll-ons, certainly not against a Boxster, and I'm non-sequential

If you're above 3400 rpm (or whatever your threshold is), you shouldn't have any lag - you can also brake boost

Send him to Charlotte, I'll race him and blow him right off the road

serbRX7

iTrader: (9)

i spank new zo6 in streight line i dont need to wait for the corner...you think z06 would keep up with me in corners...

plus if you hit the transition and have your rear end sidways that wont make you come out of the corner that fast...look at when they compared all stock rx7,evo, skayline , supra and 3000gt...at the track by profesional drivers rx7 was always last just becouse of that transition kicking the rear end out... yea its fun i actualy liked it to i kinda masterd it and was sliding up and down exit ramps...

but my car the way it is right now with GT35R single turbo feels like a wapon i cant explaint it....i let my friend drive it and he
called it a "raging bull"...

serbRX7

iTrader: (9)

my bad so its even more of a gain then i thought

serbRX7

iTrader: (9)

so you teling me that i wouldnt make 330RWHP @15psi with non sequential setup

i think they made non sequential setup using two gt25r or gt28r chra's and inducer's....with costum y-pipe...

Montego

iTrader: (1)

Lol! I already explained it twice and you dont get it. Either that or you just bring irrelevant **** to the table

let me guess this straight: you are claiming that your system does not have lag? Go peddle that somewhere else.

like i said brake boosting is a band aid for laggy set ups, besides how are you gonna brake boost out of a corner in a track situation?


well i hope so since he is stock! ha ha. Mark for the THIRD TIME it is a direct comparison of how with a sequential setup i left him behind right from the get go opposed to him getting the jump and me playing catch up and then passing him. Once i hit full boost he got DUSTED, but thats not the point. The point is how he never got the jump prior to me going nonseq. Jeez man whats so difficult to comprehend about that?

no_more_rice

At the right rpm, no. The standard definition of "lag" is hesitation between throttle application and boost response. If you're above the max boost rpm threshold, where's the lag? Are you in FD twilight zone or something?

No, the point is you weren't in the right gear. Sequential has absolutely zero advantage over non-sequential above 3400 rpm. I don't understand why this is so hard for you to understand.

no_more_rice

Back on topic: can anyone provide some feedback on this ball bearing 35R kit? Seems like Jason always has good prices.

http://www.rx7store.net/product_p/gt35r%20kit.htm

rallimike

iTrader: (1)

I've had the .82 for years, and love it. Imperceptible lag, 408 HP@ 12 psi.

no_more_rice

^^ holy rip, that's impressive....93 pump gas?