REDLINE?

Quik 64 1/2 · 03-07-2000, 06:16 PM

I was wondering what the average redline for a 289 is. As far as mods., I have full Edelbrock induction, cam dynamics cam (power range starts at 2800rpm) I'm not sure of the specs., headers, 2 1/2"exh., h pipe and 4:11 gears. Is there any way to extend the redline? What exactly determines the redline? Just curious but never really asked.

93CobraR · 03-07-2000, 07:01 PM

I need some more information like what all is done to the block? Stock pistons,rings,rods,ect....I'm guessing around 7000

------------------
87 Gt with 4 inch cowl hood, dark charcole grey, long tube headers,off road h-pipe, 2 chamber flows,BBK cold air intake, Mass air coversion(ported stock MAF), 1 intake spacer, Hypertech superchip, MAC underdrive pulleys,Pro 5.0 shifter, and a King Cobra clutch,Crane adjustable fuel press. regulator, Mac Strut and Tower Brace. Powertrax locker, 4.10's (new for this season)
Best time 14.91
Best MPH 103

Visit my site at:
http://www.geocities.com/cobrar93_20...l?947947194470

Quik 64 1/2 · 03-07-2000, 08:33 PM

It's basically stock and I'm running a 10:1 compresion ratio. 7000 seems kinda high. I've been afraid to push it past 5300.

93CobraR · 03-07-2000, 08:38 PM

High I used to turn 8500 on my old 66, it had a 289 in it.

Quik 64 1/2 · 03-07-2000, 10:22 PM

That's pretty impressive. I'm scared to see how high mine will go

2bav8 · 03-08-2000, 04:06 AM

I have no fears turning my 289 to 7500.
That's a bit out of my power range, but I'm not worried about problems with the RPM.
I try to keep things around 6800-7000 RPM, depending on the setup.

If your cam isn't coming in until 2800 RPM, you're definatly shifting to early. What are the specs on the cam, 2800 RPM is pretty high for a mainly stock motor.

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http://www.comports.com/2bav8

Billgear · 03-08-2000, 02:05 PM

If you have a stock bottom end, I would limit
your RPM to under 6K. The limiting factor is the cast pistons and most importantly the stock rod bolts. If you were to upgrade to
good Arp Rod bolts and forged pistons you
could rely rev that 289. 7000+.

Regards,
BillGear

Quik 64 1/2 · 03-08-2000, 10:08 PM

Thanks for the tip. I'll definitely keep that in mind

67enthusiast · 03-09-2000, 02:48 AM

Going from my personal experience any good street strip cam like what I have in my 302(.512 lift 230 degrees of duration at .050) or what you have in your motor doesn't make power past 6000-6500 so there would be no reason to rev it any higher.

------------------
91LX bbk shorties,bbk off-road pipe and
67 Coupe, 302, with TFS heads,13.21@ 104 on street tires

Ron1 · 03-10-2000, 02:50 AM

There are a lot of things to consider when spinning a 289/302 above 7000. And how fast will it spin up to that RPM level. Weight removal in the rotating assembly, and removal of any drag like using a windage tray, strenght by adding a main girdle support, light weight rods, slugs and lifters allow you to RPM quicker and higher. The cam choice to determine the power band, along with the intake and carb. Also take into consideration the valve springs, stock springs will usually start the valves floating around 6000 RPM. My max power is made between 7000-7600, and the engine was designed to make power in that range, since it leaves at 4800. 8500 on a stock 289??

Ron

03-07-2000, 06:16 PM	#1
Quik 64 1/2 Registered Member Join Date: Feb 2000 Location: Tampa Florida Posts: 50	REDLINE? I was wondering what the average redline for a 289 is. As far as mods., I have full Edelbrock induction, cam dynamics cam (power range starts at 2800rpm) I'm not sure of the specs., headers, 2 1/2"exh., h pipe and 4:11 gears. Is there any way to extend the redline? What exactly determines the redline? Just curious but never really asked.

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03-07-2000, 07:01 PM	#2
93CobraR Registered Member Join Date: Oct 1999 Location: Cincinnati, Ohio Posts: 1,575	I need some more information like what all is done to the block? Stock pistons,rings,rods,ect....I'm guessing around 7000 ------------------ 87 Gt with 4 inch cowl hood, dark charcole grey, long tube headers,off road h-pipe, 2 chamber flows,BBK cold air intake, Mass air coversion(ported stock MAF), 1 intake spacer, Hypertech superchip, MAC underdrive pulleys,Pro 5.0 shifter, and a King Cobra clutch,Crane adjustable fuel press. regulator, Mac Strut and Tower Brace. Powertrax locker, 4.10's (new for this season) Best time 14.91 Best MPH 103 Visit my site at: http://www.geocities.com/cobrar93_20...l?947947194470

03-07-2000, 08:33 PM	#3
Quik 64 1/2 Registered Member Join Date: Feb 2000 Location: Tampa Florida Posts: 50	It's basically stock and I'm running a 10:1 compresion ratio. 7000 seems kinda high. I've been afraid to push it past 5300.

03-07-2000, 08:38 PM	#4
93CobraR Registered Member Join Date: Oct 1999 Location: Cincinnati, Ohio Posts: 1,575	High I used to turn 8500 on my old 66, it had a 289 in it.

03-07-2000, 10:22 PM	#5
Quik 64 1/2 Registered Member Join Date: Feb 2000 Location: Tampa Florida Posts: 50	That's pretty impressive. I'm scared to see how high mine will go

03-08-2000, 04:06 AM	#6
2bav8 Registered Member Join Date: Jan 1999 Location: Scottsdale, AZ Posts: 32	I have no fears turning my 289 to 7500. That's a bit out of my power range, but I'm not worried about problems with the RPM. I try to keep things around 6800-7000 RPM, depending on the setup. If your cam isn't coming in until 2800 RPM, you're definatly shifting to early. What are the specs on the cam, 2800 RPM is pretty high for a mainly stock motor. ------------------ http://www.comports.com/2bav8

03-08-2000, 02:05 PM	#7
Billgear Registered Member Join Date: Jan 2000 Location: Concord,CA Posts: 86	If you have a stock bottom end, I would limit your RPM to under 6K. The limiting factor is the cast pistons and most importantly the stock rod bolts. If you were to upgrade to good Arp Rod bolts and forged pistons you could rely rev that 289. 7000+. Regards, BillGear

03-08-2000, 10:08 PM	#8
Quik 64 1/2 Registered Member Join Date: Feb 2000 Location: Tampa Florida Posts: 50	Thanks for the tip. I'll definitely keep that in mind

03-09-2000, 02:48 AM	#9
67enthusiast Registered Member Join Date: Feb 1999 Location: portland,oregon Posts: 6	Going from my personal experience any good street strip cam like what I have in my 302(.512 lift 230 degrees of duration at .050) or what you have in your motor doesn't make power past 6000-6500 so there would be no reason to rev it any higher. ------------------ 91LX bbk shorties,bbk off-road pipe and 67 Coupe, 302, with TFS heads,13.21@ 104 on street tires

03-10-2000, 02:50 AM	#10
Ron1 Registered Member Join Date: Sep 1999 Location: Vancouver, WA USA Posts: 439	There are a lot of things to consider when spinning a 289/302 above 7000. And how fast will it spin up to that RPM level. Weight removal in the rotating assembly, and removal of any drag like using a windage tray, strenght by adding a main girdle support, light weight rods, slugs and lifters allow you to RPM quicker and higher. The cam choice to determine the power band, along with the intake and carb. Also take into consideration the valve springs, stock springs will usually start the valves floating around 6000 RPM. My max power is made between 7000-7600, and the engine was designed to make power in that range, since it leaves at 4800. 8500 on a stock 289?? Ron