1J: Increasing rev limit
- Thread starter 250sx
- Start date
Modded ECU. Blitz, Mine's, etc.
Some are higher than others.
My Mine's is at around 7700. My last Stealth ECU, didn't have a limiter and I ran it up to 8k.
I don't know how easy modded soarer ECUs are to find though.
Some are higher than others.
My Mine's is at around 7700. My last Stealth ECU, didn't have a limiter and I ran it up to 8k.
I don't know how easy modded soarer ECUs are to find though.
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Mine's can still do reflashes IIRC, but the cost is so high, you could just buy a standalone instead. And you'd have to wait and send it to Japan and get it back.
Keep your eyes on ebay, me thinks. Soarer ECUs pop up every now and then. I've seen them before.
Keep your eyes on ebay, me thinks. Soarer ECUs pop up every now and then. I've seen them before.
viperkillertt
Peace!
Ok, so mine has no rev limit. I really wish i did have one. The stock 1j without a 2j bottom runs out of hp at like 6500 rpm. Why would you go higher? You can go with bc cams or others, i guess i understand in those cases.
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The 1j dies out around 6500 because of the stock cams.
Aftermarket cams can have the 1j revving well into 7k+ making power.
Even still, revving higher can land you in the sweet spot on the upshift.
I commonly rev my car to 7500-7700. The following gear hits nice. That doesn't really matter much on stock twins though.
Not having a rev limit at all doesn't really seem to matter anymore than having a high one. Rev limiter won't stop a mechanical overrev from a missed shift. And if you're asleep at the wheel and keep revving past the safe point, you(not you specifically) probably deserve to blow it up anyway. I didn't have any issues with my Stealth ECU that had no limit.
Aftermarket cams can have the 1j revving well into 7k+ making power.
Even still, revving higher can land you in the sweet spot on the upshift.
I commonly rev my car to 7500-7700. The following gear hits nice. That doesn't really matter much on stock twins though.
Not having a rev limit at all doesn't really seem to matter anymore than having a high one. Rev limiter won't stop a mechanical overrev from a missed shift. And if you're asleep at the wheel and keep revving past the safe point, you(not you specifically) probably deserve to blow it up anyway. I didn't have any issues with my Stealth ECU that had no limit.
viperkillertt;880558 said:
NOT TRUE.... 1j does not die after 6500.....You can rev a stock 1j to 8000 and power will not die. Power dies becuase of the turbo and tuning you are using. In theory, yes stock cams might do that. But we've done it time and time again, where by using a right fitted turbo powerband hold strong til' redline.
That's not me saying that, it's my dyno sheet. At no point does my powerband even come down. The bulk of my power is between 6300-7200(redline)
viperkillertt
Peace!
drewgo;880890 said:
Please show your maps, all of the stock cam maps that i have seen have shown it pretty much completely die at about 6200. I still would like to have a rev limit of some sort. None scares me.
i have a mines with an 8k rpm rev-limit. I don't think I'll have it much longer though. I'm selling it, and I'm going 2j
on my stock motor, power and torque would drop off drastically after 6300rpm
on my stock motor with tuned standalone, power pretty much levelled off around 6300 rather than dropping.
on my stock motor with tuned standalone and cams, torque kept climbing until just over 7000 where it levelled off. at 7500 where I had set my rev-limit, torque was still level, and power was obviously still rising.
It's a combination of tune, cams, and turbos. Cams being one of the easier to modify though.
on my stock motor with tuned standalone, power pretty much levelled off around 6300 rather than dropping.
on my stock motor with tuned standalone and cams, torque kept climbing until just over 7000 where it levelled off. at 7500 where I had set my rev-limit, torque was still level, and power was obviously still rising.
It's a combination of tune, cams, and turbos. Cams being one of the easier to modify though.
Rakkasan timing is Implied when I mentioned tuning, however on my setup, I have stock timing.
Viper, I agree. I like my rev limiter.... I am trigger happy, i'll rev this puppy til 15k if I could.
Viper, I agree. I like my rev limiter.... I am trigger happy, i'll rev this puppy til 15k if I could.
So someone mentioned something about a soarer ECU. So are there rev limits higher than the mkIII 1jz computer???
meet07;883106 said:
No or at least in my case is nope. I am at 7200 which is the same as the jza70(supra). Sometimes my SAFC 2 will read 7800. I guess that when it bounces of the rev limit. The ecu stops the revs but the engine has inertia
so the safc will read much higher.
