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2008-12-03 13:42:36 (5 weeks 2 days 2 hours 51 minutes 53 seconds) #1942045 | | view posts since this #1
- Jaytucc77
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A Spec V Redlining @ 7600RPM'S!!!
Does anyone know what mods are needed in order to achieve 7600 rpm's?
http://www.youtube.com/watch?v=8NFAC4rWhwc
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2008-12-03 13:43:19 (5 weeks 2 days 2 hours 51 minutes 10 seconds) #1942046 | | view posts since this #2
- cute02spec
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Re: A Spec V Redlining @ 7600RPM'S!!!
boostadic has a standalone and fully built motor. that's how he achieved it. but... i think he only does 7000-7200 rpm normally.
"The most successful people are those who are good at plan B: blow it up and build it better"
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2008-12-03 13:44:53 (5 weeks 2 days 2 hours 49 minutes 36 seconds) #1942049 | | view posts since this #3
- darsondriss
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Re: A Spec V Redlining @ 7600RPM'S!!!
i bet you could get to 7600 with just a raised redline...... once
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2008-12-03 13:46:16 (5 weeks 2 days 2 hours 48 minutes 13 seconds) #1942050 | | view posts since this #4
- donspecv02
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Re: A Spec V Redlining @ 7600RPM'S!!!
I'm revving to 6800 on stock internals besides cams and I'd be afraid to go any higher than that. PLUS, it wouldn't be making any power up there anyway.
14.92 @ 93.05 mph 1/4 mile with a 2.274 60' time (car still has more)
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2008-12-03 13:54:53 (5 weeks 2 days 2 hours 39 minutes 36 seconds) #1942059 | | view posts since this #5
- Black04SpecV
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Re: A Spec V Redlining @ 7600RPM'S!!!
Jaytucc77 wrote:
Does anyone know what mods are needed in order to achieve 7600 rpm's?
http://www.youtube.com/watch?v=8NFAC4rWhwc
- 07 crank
- custom cams
- custom valve springs
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2008-12-03 13:56:08 (5 weeks 2 days 2 hours 38 minutes 21 seconds) #1942062 | | view posts since this #6
- nightrider45
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Re: A Spec V Redlining @ 7600RPM'S!!!
^^ and aftermarket rods
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2008-12-03 13:56:08 (5 weeks 2 days 2 hours 38 minutes 21 seconds) #1942063 | | view posts since this #7
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Re: A Spec V Redlining @ 7600RPM'S!!!
donspecv02 wrote:
I'm revving to 6800 on stock internals besides cams and I'd be afraid to go any higher than that. PLUS, it wouldn't be making any power up there anyway.
Correct, not without stupidly aggressive cams and custom valve springs...
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2008-12-03 13:56:13 (5 weeks 2 days 2 hours 38 minutes 16 seconds) #1942064 | | view posts since this #8
- darsondriss
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Re: A Spec V Redlining @ 7600RPM'S!!!
need special pistons too... otherwise youd beat the shit outta the cylinder walls. says rtr
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2008-12-03 13:58:04 (5 weeks 2 days 2 hours 36 minutes 25 seconds) #1942067 | | view posts since this #9
- Black04SpecV
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Re: A Spec V Redlining @ 7600RPM'S!!!
darsondriss wrote:
need special pistons too... otherwise youd beat the shit outta the cylinder walls. says rtr
In other words it aint worth it... 6800rpm redline is enough...
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2008-12-03 14:00:02 (5 weeks 2 days 2 hours 34 minutes 27 seconds) #1942069 | | view posts since this #10
- nightrider45
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Re: A Spec V Redlining @ 7600RPM'S!!!
pimpsmurf wrote:
That probably is only 7200rpms or so. The stock tach is seriously off most of the time. I show 6600rpms with a 6200rpm redline, and it's definately only 6200rpms.
I 100% agree, my car is a prime example. Redline is 7k but shows almost 7500k look http://www.youtube.com/watch?v=sAkKysjuyV0
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2008-12-03 14:00:16 (5 weeks 2 days 2 hours 34 minutes 13 seconds) #1942070 | | view posts since this #11
- donspecv02
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Re: A Spec V Redlining @ 7600RPM'S!!!
Yeah. 7500+ is seriously fast piston speeds with this long stroke motor. I wouldn't even think about it on stock internals.
14.92 @ 93.05 mph 1/4 mile with a 2.274 60' time (car still has more)
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2008-12-03 14:01:02 (5 weeks 2 days 2 hours 33 minutes 27 seconds) #1942072 | | view posts since this #12
- Black04SpecV
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Re: A Spec V Redlining @ 7600RPM'S!!!
donspecv02 wrote:
Yeah. 7500+ is seriously fast piston speeds with this long stroke motor. I wouldn't even think about it on stock internals.
You could also get a few mm longer rods, to get the piston speed down a bit...
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2008-12-03 14:02:03 (5 weeks 2 days 2 hours 32 minutes 26 seconds) #1942073 | | view posts since this #13
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Re: A Spec V Redlining @ 7600RPM'S!!!
pimpsmurf wrote:
Black04SpecV wrote:
darsondriss wrote:
need special pistons too... otherwise youd beat the shit outta the cylinder walls. says rtr
In other words it aint worth it... 6800rpm redline is enough...
Nah. I plan to build a 10k+ rpm QR with a custom crank in the next 10 years. hahaha
F1 cars make loads of power with extremely high redlines because of very low strokes. I won't be going that far obviously, but I think a 80-90mm stroke is going to be ideal with a custom intake and turbo setup. Should make sweet ass power.
-JNY
I should have added, unless you have shitload of money to sink into custom engine with custom internals...
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2008-12-03 14:08:25 (5 weeks 2 days 2 hours 26 minutes 4 seconds) #1942079 | | view posts since this #14
- Black04SpecV
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Re: A Spec V Redlining @ 7600RPM'S!!!
pimpsmurf wrote:
Black04SpecV wrote:
pimpsmurf wrote:
Nah. I plan to build a 10k+ rpm QR with a custom crank in the next 10 years. hahaha
F1 cars make loads of power with extremely high redlines because of very low strokes. I won't be going that far obviously, but I think a 80-90mm stroke is going to be ideal with a custom intake and turbo setup. Should make sweet ass power.
-JNYI should have added, unless you have shitload of money to sink into custom engine with custom internals...
Most people with these engines just don't want to go that far.
-JNY
I would have LOVED to built this engine, BUT I lack funds to do it.
Most people who would like to built this engine lack the funds...
Hell I have the knowledge to built a QR25 engine capable of revving to 7-7.2k rpm and making 500+ whp... I just don't have the money to do it...
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2008-12-03 14:11:57 (5 weeks 2 days 2 hours 22 minutes 32 seconds) #1942082 | | view posts since this #15
- donspecv02
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Re: A Spec V Redlining @ 7600RPM'S!!!
Black04SpecV wrote:
pimpsmurf wrote:
Black04SpecV wrote:
I should have added, unless you have shitload of money to sink into custom engine with custom internals...Most people with these engines just don't want to go that far.
-JNYI would have LOVED to built this engine, BUT I lack funds to do it.
Most people who would like to built this engine lack the funds...
Hell I have the knowledge to built a QR25 engine capable of revving to 7-7.2k rpm and making 500+ whp... I just don't have the money to do it...
The options are cheaper than you think.....
14.92 @ 93.05 mph 1/4 mile with a 2.274 60' time (car still has more)
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2008-12-03 14:13:07 (5 weeks 2 days 2 hours 21 minutes 22 seconds) #1942087 | | view posts since this #16
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Re: A Spec V Redlining @ 7600RPM'S!!!
donspecv02 wrote:
Black04SpecV wrote:
pimpsmurf wrote:
Most people with these engines just don't want to go that far.
-JNYI would have LOVED to built this engine, BUT I lack funds to do it.
Most people who would like to built this engine lack the funds...
Hell I have the knowledge to built a QR25 engine capable of revving to 7-7.2k rpm and making 500+ whp... I just don't have the money to do it...The options are cheaper than you think.....
Well I can't even afford a 3" catback...lol
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2008-12-03 14:16:16 (5 weeks 2 days 2 hours 18 minutes 13 seconds) #1942093 | | view posts since this #17
- donspecv02
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Re: A Spec V Redlining @ 7600RPM'S!!!
I'm also gonna add here that a good, USABLE powerband is more important than peak numbers. Finding a good balance is important with any engine.
14.92 @ 93.05 mph 1/4 mile with a 2.274 60' time (car still has more)
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2008-12-03 14:17:47 (5 weeks 2 days 2 hours 16 minutes 42 seconds) #1942098 | | view posts since this #18
- Black04SpecV
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Re: A Spec V Redlining @ 7600RPM'S!!!
donspecv02 wrote:
I'm also gonna add here that a good, USABLE powerband is more important than peak numbers. Finding a good balance is important with any engine.
+1
To make power all the way to 7500rpm redline you will need stupidly aggresive cams, which will make the low end suck balls...
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2008-12-03 22:09:55 (5 weeks 1 day 18 hours 24 minutes 34 seconds) #1942646 | | view posts since this #19
- RedDragonV09
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Re: A Spec V Redlining @ 7600RPM'S!!!
Im aiming for 8000-8500rpm redline. This will be my winter build for next spring so give me a few more months, Ill be there. 
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2008-12-03 22:38:37 (5 weeks 1 day 17 hours 55 minutes 52 seconds) #1942691 | | view posts since this #20
- doom_21
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Re: A Spec V Redlining @ 7600RPM'S!!!
What is IVT? I havnt heard that term before.
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2008-12-03 22:44:33 (5 weeks 1 day 17 hours 49 minutes 56 seconds) #1942709 | | view posts since this #21
- nightrider45
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Re: A Spec V Redlining @ 7600RPM'S!!!
ignition valve timing, i'm guessing.
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2008-12-04 01:42:30 (5 weeks 1 day 14 hours 51 minutes 59 seconds) #1942916 | | view posts since this #22
- doom_21
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Re: A Spec V Redlining @ 7600RPM'S!!!
oh. ok. thanks.
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2008-12-04 02:49:34 (5 weeks 1 day 13 hours 44 minutes 55 seconds) #1942961 | | view posts since this #23
- omar
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Re: A Spec V Redlining @ 7600RPM'S!!!
stock tachometers are off, mins always showing 6500 when i redline, and i even once in a mis proper shift got it to show 7k LOL though i think it was really 6500-6700
nissanchick860 (11:33:06 PM): ROR <-heidi using ROR, eat that mods!!!!!!
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2008-12-04 06:08:05 (5 weeks 1 day 10 hours 26 minutes 24 seconds) #1943000 | | view posts since this #24
- Black04SpecV
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Re: A Spec V Redlining @ 7600RPM'S!!!
pimpsmurf wrote:
Black04SpecV wrote:
donspecv02 wrote:
I'm also gonna add here that a good, USABLE powerband is more important than peak numbers. Finding a good balance is important with any engine.
+1
To make power all the way to 7500rpm redline you will need stupidly aggresive cams, which will make the low end suck balls...Not true. IVT does a lot for us in this regard, preventing idle/low speed overlap, reversion, and poor torque. When electronicly controlled cams (vtec, i-vtec, IVT, VVEL especially), comes into play, it changes the rules of top end, and bottom end cams. That is why the technology was invented in the first place, and VVEL is going to open up doors we can only imagine (a reflash with 20-40whp gains depending on mods??? I'll take it.)
-JNY
So how do you explain that donspecv02 lost a LOT of low end torque, when he dynoed with the BC stage 3 cams?
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2008-12-04 10:14:17 (5 weeks 1 day 6 hours 20 minutes 12 seconds) #1943169 | | view posts since this #25
- donspecv02
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Re: A Spec V Redlining @ 7600RPM'S!!!
Black04SpecV wrote:
pimpsmurf wrote:
Black04SpecV wrote:
+1
To make power all the way to 7500rpm redline you will need stupidly aggresive cams, which will make the low end suck balls...Not true. IVT does a lot for us in this regard, preventing idle/low speed overlap, reversion, and poor torque. When electronicly controlled cams (vtec, i-vtec, IVT, VVEL especially), comes into play, it changes the rules of top end, and bottom end cams. That is why the technology was invented in the first place, and VVEL is going to open up doors we can only imagine (a reflash with 20-40whp gains depending on mods??? I'll take it.)
-JNYSo how do you explain that donspecv02 lost a LOT of low end torque, when he dynoed with the BC stage 3 cams?
I think it was because the exhaust cam is too big.
14.92 @ 93.05 mph 1/4 mile with a 2.274 60' time (car still has more)
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