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#1
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Redline limits
I understand that in LAN's tcu chip he changes the rev limits on the stock system. I wanted to open this topic up for discussion basically to see what all the educated and experienced guys think.
The questions I offer up are: Is this good for the motor? If using a manual transmission and a stand alone would it be wise or beneficial to raise the red line? If so what would be a good general limit? What can the motor handle safely without heavy modification. |
#2
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Re: Redline limits
From what I've seen the engine's powerband (stock) drops quite sharply upwards of 6000 RPM, so there's really no reason to be screaming it at 7000+, you're just putting yourself into danger territory regarding the bottom end bearings.
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Chris 92 Ebony Mica LS-L "A Rolling Restoration": 223,250 KM - Sleeping 2007 STi 6MT, Stance GR+ coilovers, PWR Rad, JDM hood badge, svxfiles 6000K HIDs, JDM Clear Corners, $15/15 min mod, $20/20 min mod, Energy Swaybar Bushings, Hella Supertones horns, Gold STi BBS rims, Group A lightweight crank pulley, A/C system removed, Custom header-back exhaust, Hybrid carbon/metal rear sway bar, restored headlights with CCFL halos 2008 Subaru Legacy Spec B - Diamond Grey Metallic - Sold 2020 Ram 1500 Longhorn - Red Pearl |
#3
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Re: Redline limits
Even with a standalone ECU, very free breathing exhaust and intake systems, the stock engine (e.g., cams/headwork) is peaked out at around 5500 rpms. It tapers off after that and by 6500 rpms it's ALL done making respectable power. I see no reason to be revving it much higher than that.
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#4
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Re: Redline limits
The only time pushing to 7000 becomes an issue is when you are trying to avoid an extra shift. I used to be able to carry 3rd all the way down the No-Name Straight at Lime Rock, going up to about 7200 rpm. The last time I drove there I was faster out of the Esses and had to shift anyway. Heading toward the toe of the boot at Watkins Glen is the same deal. The first couple of times I drove there, I would hold 3rd into the toe. The last time I had to shift anyway. If you are going to have to shift, getting it over at 6000 rpm is good. If holding to 7000 enables you to aviod shifting then you should do that.
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____________________________________________ 95 LS-i Red, 31,xxx; bone stock for now; Daily Driver 94 LS-i Emerald Pearl, 106,xxx,; 246 whp; Tomyx snorkus and HKS Cold air intake; PWR aluminum radiator, silicone hoses; Inline thermostat; enhanced coolant routing; external power steering and oil coolers; Phenolic intake manifold spacers; 2004 WRX 5 speed transmission; ACT Clutch Kit, Heavy Duty Pressure Plate, Lightweight flywheel, performance disc; Group N motor mounts; ‘07 WRX 4-pot front calipers, cryo-treated slotted Tribeca rotors; Hawk HPS ferro-carbon pads; Frozenrotor rear slotted rotors; SS brake lines, Axxis Ultimate pads; Rota Torque 17x8 wheels; 245/40-17 Bridgestone RE01-R's; Koni inserts with Ground Control coilovers, Eibach springs; K-Mac camber/caster adjustable strut mounts; Urethane swaybar bushings; Bontrager rear sway bar; Urethane differential bushing; Custom Whiteline adjustable rear lateral links; Outlaw Engineering forged underdrive pulley; custom grind Web intake and exhaust cams (11 mm lift, 250° duration); solid lifters; CP custom aluminum forged 11 to 1 pistons, Brian Crower coated SS intake & exhaust valves; Brian Crower upgraded springs w/ titanium retainers; NGK sparkplugs; RallyBob (Bob Legere) ported and polished cylinder heads; Eagle H-beam rods; ACL Bearings; Cometic Head gaskets; ARP head studs & fasteners; Hydra Nemesis EMS; Wideband O2 sensor; 740cc Injectors; Walbro 255lph fuel pump; Upgraded WRX starter; Equal length SS headers (3 into 1); dual Magnaflow cat converters; 2 into 1 into 2 SS exhaust with Bullet muffler; OT Fiberglass hood; Oil pressure gauge; Programmable shift light, 2017 Subaru Forester XT, metallic dark gray, 29,xxx 2005 Porsche 911 Turbo S Cabrio, 24,xxx 2006 Subaru Outback LL Bean, 166,xxx sold 92 LSL Dark Teal, Smallcar Shift Kit - sold |
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