Necro thread alert, lol.
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Originally Posted by BARMY
(Post 919926)
My '04 MX5 SE (aka Mazdaspeed Miata) now spends a lot of time on the track, I've been killing brakes and tyres, so I'm going to go with the 201rwhp map instead of the 233rwhp one and aim to become a better cornerer. The ECU presently stops the action at 6500rpm, which seemed a good thing with the high power map, but was a bit intrusive in several places on the tracks I drive at. So when I finally work out how to play around with the Haltech, can I go with a higher rev limit with less boost?
I spin my Mazdaspeed to 7600. Also: Toasting in a 7 year old thread!!! |
Originally Posted by concealer404
(Post 920010)
Also: Toasting in a 7 year old thread!!!
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7600rpm is outside of my comfort zone for a factory motor. The rods aren't going to like that for long. 7250 is a much safer number.
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Again, sorry for the necro. But reading more about these motors makes me feel happier leaving mine at 6750 bearing in mind it hits 16psi at those revs - because apparently revs kill rods?
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torque/pressure kills rods.
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So what rpm can I safely go to?
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Originally Posted by BARMY
(Post 931310)
So what rpm can I safely go to?
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Stock redline is 7000. 7200 is safe forever (i.e. endurance cars). 7400 for HPDE/normal track cars. 7600 for street cars that might see that figure once a day for a moment.
Run an HPDE car at 7600 and it will blow up eventually. Run an endurance car at 7600 and it will blow up fast. |
Originally Posted by Savington
(Post 931458)
Stock redline is 7000. 7200 is safe forever (i.e. endurance cars). 7400 for HPDE/normal track cars. 7600 for street cars that might see that figure once a day for a moment.
Run an HPDE car at 7600 and it will blow up eventually. Run an endurance car at 7600 and it will blow up fast. |
idk about you fags but I rev my car to 12k all day every day because the sounds of det make my cock swell
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Originally Posted by hustler
(Post 931588)
What breaks? Eventually I'd like to get a Supermiata crank gear and wheel, Skunk t-body, and then rev higher...but that's a lot of scratch.
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Originally Posted by shuiend
(Post 931622)
I think it depends on which head you have and what is done to the head.
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Originally Posted by hustler
(Post 931588)
What breaks? Eventually I'd like to get a Supermiata crank gear and wheel, Skunk t-body, and then rev higher...but that's a lot of scratch.
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2 Attachment(s)
Originally Posted by shuiend
(Post 931314)
What is done to your motor? The stock redline of 7200 should be more then safe.
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Originally Posted by Savington
(Post 931678)
Different stuff breaks depending on the application. Enduro/track cars will typically break the throttle shaft first, then break the crank pulley bolts, then damage the valvetrain (7500+), then stretch the stock rods (7600+). If you expect OEM reliability at 7500+, you need to address all of that.
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Originally Posted by ecugrad
(Post 50129)
I have been pondering rev limits for my squirted N/A 1.6. AFAIK, the stock limit is 7,300 rpm.
Im thinking around 7,800 rpm. My car is tracked and autocrossed EXTENSIVELY in CSP with 13" Wheels. This translates into a bunch of time spent on or near the limiter for autox. Lets not pretend all motors are equal. So here is what i have on my 1.6L. Started off completely stock driven by grandma until 46K miles. Then i got it. drove it on the track for a little over 1K miles then. Full exhaust, Intake, Megasquirt 126WHP. Raised the RMP to 7,500 and have been driving it for the past Year and 1/2 for at least 2 track weekends a month. I bounce of the rev limiter almost religiously and beet the hell out of it. I change the oil very 2-3 events stock oil filter and Rotella T6. I have a coolant reroute 180 thermostat and ducting for rad. I never see temps over 185 on the track even when it is 100 gotta love Texas. I have no idea what my oil temps are and that has been on my mind so i'm installing a sensor as soon as i stop being lazy. I run 225 Nt01's 87oct and im waiting for the motor to fail so i can try a hot 1.8. |
Wonder if he'll log in for the first time in 4 years to see your reply. :giggle: :bowrofl:
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Originally Posted by concealer404
(Post 1160031)
Wonder if he'll log in for the first time in 4 years to see your reply. :giggle: :bowrofl:
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Not that I am into necro or anything but this thread is on point. I have done some reading on bumping up the rev limit and this helped me out.
I autocross very competitively quite often (20-30 events/year) and attend 1-3 HPDE's/year. I am looking to increase my rev limit because when I autocross I am too often at the limiter and I end up losing ground/time. Switching to 3rd and then rev matching down is fun but that also loses me time. I am planning on bumping up my limit to 7,500 this season (lower for track days). I think I should be safe. What do you guys think? Here are my specs: 95 bottom w/ 99 factory head. ~5k miles since it was built. MS2 210 - 240 whp Forged rods and ARP hardware all around FM lightened flywheel 4.1 diff (switching to a 3.9 this season) 225/50-15 tires According to the FM gearing calculator, with the new rev limit and the 3.9 diff, I can take 2nd to 72 mph!! I can smell a few more FTD's this season. Thanks in advance. |
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