No reprogramming needed..


Works great. tested on a 96 SE 5speed and it HAULED!!!!

Nabil's car was HAULING today!!!! holy cow.

so yup. if you guys want the Gforce ECU, it WILL work with the MEVI!

YAY


dyno soon!

 

But it doesn't extend the redline right? Just increases power up to redline?
-Cyrus

 

doh!

 

ya thats what I was also worried about, the group buy on the g-force is an incredible deal for an aftermarket ECU, but the extended redline seems like it would be almost essential if you were going to get an ECU to work with your MEVI....even if its like $600

 

Are they ever going to make the ECU for us 99's?

 

Sounds good. I think a lot more people would buy the G-Force ECUs if it raised the redline. I mutliplied out the correct shift points with the VI and you NEED the extra 500rpms (possibly more) for maximum performance. With stock 6500 redline, we're not using the full acceleration curve just like the 2000-2001 owners. By having a raised redline, you'll be able to accelerate along a curve with over an extra 10fwhp.


Dave

 

Power drop's off right (with the mevi) is just at the rev limiter.

by giving you an xtra 500 rpms to "shift" would be better, but not necessary if you're an expert shifter like yourself dave.


so this thread is just to let people know that the ECU (with the group deal going) will work with the MEVI.

 

I've just purchased a G-Force ECU for a really good price, but I'll still be going to the raised rev limiter JWT next spring. I plan on doing some dynos with each ECU to quantify the gains of each when I have them. I'm stoked about getting the G-Force, I loved how that JET Performance ECU felt and I can only imagine the G-Force to be better than that.

 

Probably not because they haven't made ECUs for the 98+ SE-R or SR20DE powered cars. But you can instead rewire the ECU connector to use a 95-97 ECU. Here is how they do it for the 98+ SR20DE below. Also copy or save this pic http://www.geocities.com/n_dahi12/ecu_rewire_2.jpg. It shows which pins to modify. Like I've been saying all you need to do is get a wiring diagram for both and do alittle rewiring. If that scares you can you find someone else to do it.
http://www.sr20deforum.com/showthrea...+ecu+AND+1998.

 

I think what dave is trying to say is.. the reason 4th Gen's don't dyno the same as 2000 and 2001 maxima's is because they need that extra 500 rpms..

so if a 4th Gen is dynoing 182 fwhp with the same mods as a 5th Gen.. the 5th Gen will dyno 192 fwhp.. but with the 500 extra rpms.. that 4th Gen will have 192 fwhp @ 7000 rpms.. at least thats what i interpreted him as saying.. i don't think he was saying which ecu is better or not.. he was just pointning out the 7000 will bring it to the 5th Gen peformance

 

How is raising the redline beneficial? With the VI doesnt the HP on a 4th gen just plateau basically? The 5th Gens make their peak hp at redline and could benefit from a higher redline IMO.

 

i think the horsepower keeps increasing as the rpm's climb.. no remember a 4th Gen with a VI is bascially now a 5th Gen.. so the more rpms you have.. the more power you will make.. since power is just increasing.. i wonder if JWT could do a 7500 rpm redline.. shoot.. i would pay $200 more for a 7500 rpm redline

 

What 5th gen redlines at 7K? 2k-2k1 3.0 5spd fuel cut is at 6600? And the 2k2/2k3 tach goes to 7K but from my understanding the engine isn't going above 6650?? (my numbers can be off a bit).

2k/2k1 5spds need an increase in fuel cut rpm big time as well.

 

no you guys don't get what he is saying..

this is basically what he is saying..

for a 4th Gen with a VI to perform like a 5th Gen ..

the 4th Gen needs a 7000 rpm redline to match the performance of a 5th Gen with a 6600 rpm redline..

not saying 5th Gen's have a 7k redline.. just saying thas what the 4th Gen needs... so if the 5th Gen's were the same weight as the 4th Gen's.. if they were both racing.. the 4th Gen would need a 7000 rpm redline to be exactly equal to the 5th Gen at 6600 rpms..

hope this is clear now and hope this was what dave was saying or else i am just wasting my time..

 

I have always thought that the VI for 4th gens just sustains the power, rather than make more. At least thats the impression I have got talking to Neal and Brian. The 7500 redline would be sweet, but I would find myself using it very often. Our engines can handle the added RPMs, but I have a feeling that Nissan made our current redline to save the accessories. I dont know if the Water Pump, Alternator, etc. are designed for higher RPMs.

 

Got it. Taking into consideration a 7k redline on a 4th gen what rpm would be optimal for the vi to kick in at? It is adjustable correct?

 

its activated by an RPM switch.. which has pills on it which allows you to set the RPM on and off within 100 rpms.. looking at most 4th Gen dyno graphs.. the power seems to drop off around 5000 - 5500 rpms.. couple 4th Gen owners have played with their rpm pills from 4500 - 5500 and the optimal setting seems to be 5000 rpms activation..

Mr. Cranman actually has a spreadsheet with his different rpm's he has activated the VI at..

http://www.vanillaice.com/webmasters/hype/mrc/mrcVI.xls

 

Actually what I was trying to say is that if you are able to enter each gear 500rpms higher (aka a 7000rpm limiter), you'll be accelerating in an area on the curve that has over 10fwhp more. The VI for the 4th gen seems to make peak power around 5900-6000rpms and then the curve goes pretty much flat until redline. It doesn't fall off, but it doesn't go up. The 2k2 Maxima does the same exact thing. The VI on the 4th gen doesn't have an extra set of short intake runners like the 5th gen has therefore it doesn't add that much more "peak" power.

In a nutshell, if you have a 7000 limiter, it means you'll land at 4800rpms in 2nd (vs 4300rpms), 5200rpms in 3rd (vs 4700rpms), and 5500rpms in 4th (vs 5000rpms). The advantage is that you're able to enter the next gear in a higher HP that carries pretty much all the way to 7000rpms. I multiplied out the shift points from Mr Cranman's 5 speed with the VI and JWT dyno. 7000-7100rpms is ideal. 6500 is too low to take full advantage of the system.


Dave

 

 

Cheston said G-Force hasn't yet been able to "crack the code" in essence that is needed to change the rev limiter. They haven't figured out a way, but if they did they'd move quite a few ECUs to MEVI owners.