rx7legend

hi, i just wanted to know if someone has one of those chipped ecu by amemiya or blue note, i want to know if is really worht it because it seems it refines the timing, eliminate boost cut etc. just want to know the experiences of people with these.

gxlkinglv

Hey would a chiped ecu that lets you redline higher be worth it for a daily driver and is it true that after 7000rpm its just all power loss i had a friend with a gtu tell me this.

Sideways7

iTrader: (7)

Unless your car is highly modded with a large streetport, you wont get any benefit from a higher redline. Even with my massive streetport, there was no advantage of going past 7500, which you can still do with a stock ecu. I think the OP was talking about an ECU for a turbo car, anyway.

rx7legend

well bro, i don't know about your gtu but i redline my Turbo 2 all the time and believe me you don't lose power above 7000 rpms on an n/a you gain power, if you friend or you are trowing your gears below 7000rpms in his or yours n/a he doesn't know what he has, he should be redlining that n/a to 8000rpms at least. and don't know about you but my TII doesn't redline, he justk keeps climbing.

later

rx7legend

thats right, for an S5 tII, but it seems nobody use this chipped ecu's lol.

Sideways7

iTrader: (7)

Having owned a stock ported NA, the power on an s4 drops off above 6500-7k. I assume its more like 7.5k-8k on an s5.

Apathy

I guess it depends... b/c with my 88 gxl before I did the swap, it had intake, exhaust, new injectors, and an safc 2. It made constant power up to about 7.5K... After that I noticed a noticable drop in power (probably because of the fuel cut coming up at 8k.... lol)

airworks-fc3s

my experiences were different! as to a stock turbo setup this statement is true, even though there would be a gain in acceleration 'cause you can hang on a gear longer 'till shifting!
but with my t60-1 setup i had a constant horsepower increase untill redline (8000rpm), completely stock s5 block, FMIC and exhaust!

regs

gxlkinglv

Now would this hold some truth for my s4 gxl using the stock ecu or would i feel a heck of a loss after 7000rpm even if i used a chiped ecu to let it rev to 8000rpm.

Black91n/a

There's a redline for a reason. Much more revs than that and you run into problems. The engine's not designed to rev like that and you'll be seriously cutting into it's life expectancy and you can possibly cause it to die right away. The stock rev limiter is about 1000rpm's above the redline already, and that's in dangerous territory. Any higher is an invitation for disaster. If you want to rev high then get an engine built for it, otherwise keep it below the red.

There's some chips that are used quite a bit here and have real advantages, with customer support and user feedback. Look in the Rtek section for information. With an RE Amemiya or Blue Note chipped ECU you'll be pretty much on your own. I'd also hazard the guess that the price/performance ratio is pretty bad on one of those. Those parts sold in Japan only are usually hideously expensive once they get here.

13b4me

Holy **** this thread is going nowhere fast!

Black91n/a has the right idea... First off, YES you will experience a sharp decrease in power above redline... You will also kill your engine... The higher you rev the engine, the greater your chances are of severely damaging your internal workings... That's why you have balanced rotating assemblies, large port jobs, eccentric shaft jetting, and all the other internal upgrades that allow the engine to better handle the extra revs... There's no way around it... With a large turbo, you'll still be making power above redline, but that doesn't change the fact that you have a RED LINE telling you when to STOP... If you disregard it, you will blow your engine... Can't put it much simpler than that...

As for the chipped ECU's, they WILL NOT work for N/A vehicles... These aren't Honda's... We don't have a million different ECU flashes for N/A builds... All of the chipped ECU's you see from RE Amemiya, Knight Sport, Panspeed, etc, are for S5 TII's only! The S4 cannot benefit from these! On the same token, the S5 TII CANNOT use the Rtek ECU upgrades... Unfortunately they are still in the developmental stages for everything except the S4 TII...

Your only option for N/A is Haltech, Microtech, Megasquirt, or another full standalone engine management system... Either that or an SAFC and a STFU...

turbo2ltr

iTrader: (1)

Actually we have S5 NA stage 1.0 out. Just eliminates the MOP (for now).

13b4me

I stand corrected!











Barely... lol

airworks-fc3s

rotaries are very well balanced in stock condition and if there is no suspect vibration, you can easily redline that 13b!

one thing i experienced: on my S5 TII i had slight vibration after 7000rpm, so i only pulled it to 7000. after swapping the flywheel to aluminium, these vibrations were gone! it now revs unbelievably smooth until rev limiter at somewhat after 8k's!

but note: S4 TII's have heavier rotors, maybe that's the issue... could be better not to rev them that hard!

13b4me

Either way... The faster something spins, the more it expands... When taking the rotary past it's limits, you run the risk of the rotor itself contacting the housing, which results in very nasty gouges... Not to mention the lack of lubrication to the eshaft at high RPM's... There are many other reasons for not doing it besides power loss...

airworks-fc3s

so i'll perform the oil jet mod on my rebuild this winter

lnlycrpr

going back to the original ? in this thread... i dont have the RE or the Blue Note brand ROM ecu but i have the Power House Amuse. yes it cures the fuel cut, raises the rev lim and changes the fuel mapping to a more aggresive one. timing (advance/retard) i cannot prove it so i'm going to go with "more than likely" i have no way to test/prove this.

remember... these are usually tuned to spec by the customer who purchased it. lights mods like intake and exhaust. boost up does not mean 20psi, it usually means from stock to ~12psi. fuel mapping is usally mapped using stock injectors. dont throw a t60 on there with 1000cc injectors and expect the ROM to take care of it, its not going to happen.

mine gave a significant increase in power with the mods i have, but i still plan on putting a SAFC to monitor when i go hybrid. hope that helps you out. ask the seller to give you a list of what it's tuned for.

13b4me

Exactly! ^^^

A "reprogrammed" ECU, as opposed to a "programmable" ECU, is setup for a certain build, and buying them used, you really have no idea what they were set up for... One thing you can count on always, is the fact that a standard reprogrammed ECU is NOT variable! It was designed with a specific purpose in mind... If you have any serious plans for your car, get away from ebay and invest some real money into something with a little headroom!

rx7legend

lol can't do bro, ebay is my friend jajaja, basically all my TII parts are from ebay lol, and for the chip ecu, i just want something that can adjust my timing but i don't freaking want a standalone for what i want the car, i want to get to low 13's or high 12's on the 1/4 mile with my TII, it has stock turbo safc, bla bla bla you know the usual bolt-ons, if i can freaking adjust my timing i know im goona get some extra hp and thats what im looking for. i was looking at the msd ignition timing controller and it looks good but never heard of a fellow rotary owner that has it so i don't know if they work good on a Rotary. the other option is the apex'i s-itc but thats like 6 or 7 years old and also don't know how they work on rotarys. the other option is standalone but i don't want to get in that territory yet, i want to do the lowest 1/4 mile i can on my TII without going standalone so that's why im asking on this chip ecu's but it seems they're not going to work for me lol.

later

13b4me

Well you can't adjust the timing then... Guess you're stuck waiting for the Rtek 2.0 to come out for the S5... lol

lnlycrpr

only a standalone is going to let you adjust the timing. the rom ecu "claims" to adjust timing properly (more power) up to its boost level. 12~13 lbs is probaly the max. most of these are tuned with stock turbos anyway. since you have an AFC why dont you just go with it? it will definitely increase your hp and you'll notice a difference. get some secondaries and a wideband to monitor and you'll be able to tune accordingly. wont be like a standalone, but it will let you play with the AFRs. oh by the way... Ebay is my homeboy too. thats where i got my ROM.

13b4me

Where are you located btw? Fayettenam? Cherry Point?