Increasing the Redline

Starlight1988 · 07-08-2008, 02:53 AM

Sup! i was just wondering if anyone knew how to increase the engine's redline. i know someone told me something about tuning the ECU and wanted to know if that was it.

SideWinderGX · 07-08-2008, 05:55 AM

New valvetrain is needed i believe. not sure on the stock rpm limits for the block components though.

afaik, the rev limiter is only imposed because there is no mapping for the injectors to fire any faster. map the injectors up to a certain speed and theyll fire up to that certain speed. how to do that, i cant help ya

robertsws · 07-08-2008, 03:50 PM

i was told a few months ago that you needed to upgrade the pistons as well. not sure if that's the case or not but it does raise a question about the rpm limits / tolerances of stock components

Chambers · 07-08-2008, 04:10 PM

I would say you need all new connecting rods and pistons for the bottom end, the stock connecting rods may give out at higher rpms.

As for the valvetrain, you would need stronger valvesprings so they will adquetly close so they do not hit the pistons, then you would problably need to replace all the other valvetrain componetns as well.

I did read somewhere, that there was someone who would take Toyota ECUs and "tune" them for a higher rev limit and fuel maps, but you can do that with a piggback ECU as well.

You would have to lay down some serious cash to do this, but in the end you would have one reving mo-fo.

SideWinderGX · 07-08-2008, 07:22 PM

Quote:

Originally Posted by Chambers

I would say you need all new connecting rods and pistons for the bottom end, the stock connecting rods may give out at higher rpms.

As for the valvetrain, you would need stronger valvesprings so they will adquetly close so they do not hit the pistons, then you would problably need to replace all the other valvetrain componetns as well.

I did read somewhere, that there was someone who would take Toyota ECUs and "tune" them for a higher rev limit and fuel maps, but you can do that with a piggback ECU as well.

You would have to lay down some serious cash to do this, but in the end you would have one reving mo-fo.

in the long run....what i want

supradrift · 07-10-2008, 11:03 PM

they put redline on cars cause thats the farthest they can rev safely on stock components without putting to much strain on other parts id leave it til some serious building is done and your sure everything can handle it

SideWinderGX · 07-10-2008, 11:13 PM

Quote:

Originally Posted by supradrift

they put redline on cars cause thats the farthest they can rev safely on stock components without putting to much strain on other parts id leave it til some serious building is done and your sure everything can handle it

Thanks.

07-08-2008, 02:53 AM	#1
Starlight1988 Stock Join Date: Dec 2007 Location: Lawton, OK Posts: 25	Increasing the Redline Sup! i was just wondering if anyone knew how to increase the engine's redline. i know someone told me something about tuning the ECU and wanted to know if that was it. __________________ zoom zoom!

07-08-2008, 05:55 AM	#2
SideWinderGX 3" Exhaust Join Date: Feb 2007 Location: Syracuse, NY Posts: 203	New valvetrain is needed i believe. not sure on the stock rpm limits for the block components though. afaik, the rev limiter is only imposed because there is no mapping for the injectors to fire any faster. map the injectors up to a certain speed and theyll fire up to that certain speed. how to do that, i cant help ya __________________ my car: 1987 brownish Toyota Supra Turbo, automatic 7MGTE engine with ~100k miles on it.

07-08-2008, 03:50 PM	#3
robertsws 3" Exhaust Join Date: May 2008 Location: Gaithersburg, Maryland Posts: 63	i was told a few months ago that you needed to upgrade the pistons as well. not sure if that's the case or not but it does raise a question about the rpm limits / tolerances of stock components __________________ 1991 Supra - Turbo - 5spd 60-1 upgraded turbo Lexus AFM 3" exhaust, 4" tip SAFC 2 550cc injectors (2 sets, venom direct fit, RC engineering) 2.5" intercooler and piping Aluminum radiator w/dual electric fans ARP bolts w/MHG Full-auto turbo timer Fidanza Flywheel & Stage 2 Clutch spark plugs and wires. power steering pump cold temp start switch engine top end rebuilt transmission opened up and inspected at a tranny shop when the flywheel and clutch installed last week.

07-08-2008, 04:10 PM	#4
Chambers walbro fp Join Date: May 2007 Location: USA - Harford County, Maryland Posts: 481	I would say you need all new connecting rods and pistons for the bottom end, the stock connecting rods may give out at higher rpms. As for the valvetrain, you would need stronger valvesprings so they will adquetly close so they do not hit the pistons, then you would problably need to replace all the other valvetrain componetns as well. I did read somewhere, that there was someone who would take Toyota ECUs and "tune" them for a higher rev limit and fuel maps, but you can do that with a piggback ECU as well. You would have to lay down some serious cash to do this, but in the end you would have one reving mo-fo. __________________ Whats in the garage, well.... in the yard. 1986.5 Toyota Supra - NA - 5 spd 1986 Ford Ranger Lowrider - 5 spd 1984 Ford Ranger XLT - 7" Lift - 4X4 - Auto "Stuck in the 80's"

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07-10-2008, 11:03 PM	#6
supradrift 3" Exhaust Join Date: Jul 2006 Location: connecticut Posts: 92	they put redline on cars cause thats the farthest they can rev safely on stock components without putting to much strain on other parts id leave it til some serious building is done and your sure everything can handle it