Red line?

[piratewilly]

Hey my 88 LX carbed says it redlines at 6000, but i know first hand it will rev past that, so what is the "redline" of my car, i know it deff looses power after about 6200 rpm but is this because of the low cfm carb? the design of the head won't allow the air to get the the cyl fast enough at the speed? maybe a combination of the 2? or is it something completely different, i would love to have a high reving b3 lol

[Gforcefd]

well if its carbed that mean it doesn't have any sort of fuel cut off right? If you mean the redline on your tachnometer that is the point where the cars engine will suffer damage I believe.....?

[piratewilly]

Yeah thats what i mean the redline on the tach, but thats why i started this thread, what really does happen after the manufactures suggested maximin engine operating range haha. Im sure the u could actually go higher then what they suggest because they know people are going to take it up to redline and they wouldn't put the the redline at 6000 if any higher then that would cause damage. For instance lets say your car is a bucket, and ur rpms are water, and the more water u put in the bucket, the faster you could fill something up, but if any water spilled out of the bucket it would do damage to the bucket. So of course the bucket makers would suggest filling up the bucket to a certain level that is not close to the top, because they know if they tell you to fill it up all the way to the top there is a chance you could spill and do damage to the bucket lol. So wow my brain works weird but does that make since?

[Gforcefd]

Well cars are more precise than buckets...I believe the B3's actual redline is 6200. If you help it there for a long enough time you can melt the pistons right out.

[piratewilly]

oh i do belive that haha thats for sure, and why does my sister call my festiva a bucket? lol actually she named my festiva, she is in shape and she makes fun of my cause im in shape too, but a different kinda shape (hey round is a shape right) and the suspension is a little worn so when i get in it, it leans just oh so slightly, lol, so its not the festiva, its the FATstiva lol

[88FestivaLX]

Hmmmm, my 88 LX feels useless after about 3500....could I have a problem? On the other hand my other white 88 goes to 6500 almost instantly, but its a Mustang, ha

[Mike McKown]

The redline shown on a tachometer is the point at which you should not exceed that engine rpm under any normal circumstances. Engine rpm in most 4 cycle, valve in head engines is limited by the ability of the valve train to follow and stay in contact with the camshaft. If you choose to rev past the point of valve control (red line), you can crash a valve(s) into the piston(s) and the results can be anywhere from nothing/minor to catastrophic. Depends on the engine.

Computer controlled engines often have fuel or ignition cut offs that prevent the engine from being twisted into self-destruction.

[Omgloltokyodrift]

The redline shown on a tachometer is the point at which you should not exceed that engine rpm under any normal circumstances. Engine rpm in most 4 cycle, valve in head engines is limited by the ability of the valve train to follow and stay in contact with the camshaft. If you choose to rev past the point of valve control (red line), you can crash a valve(s) into the piston(s) and the results can be anywhere from nothing/minor to catastrophic. Depends on the engine.

Computer controlled engines often have fuel or ignition cut offs that prevent the engine from being twisted into self-destruction.

B-Series' tend to do this, once the valves float...



Been there, done that.

[SimonTuffGuy]

My built BP revs a bit into the 7,000 range... Although, I don't think it's really making much more power, than shifting into the next gear.

[Bathtub Tom]

I've been to 6500 a few times in my '93 carbed Kia, but as its not done 70000 (miles not Ks) yet I'm keeping the revs down until it's run-in.
I would've thought carbed engines would be limited by valve bounce, and as these are non-interference engines - the sky's the limit.

[Nerd Racing]

Simon the BP's redline is 7K so that's not too bad. I believe they have fuel cut at 7K as well, and the GTX BPT ECU cuts around 7200

[25Horseplay]

I have revved my 89 carbed car to 7500 RPM's a couple times! LOL. I didn't realize i was doing this at first untill I installed a tach dash!

[Gforcefd]

MY BP cuts at 7200, but I never go till it cuts, I like to keep my engine in tact for now.

[Nerd Racing]

good call!

[CharlieZ]

Look at the HP & torque v.s. RPM charts of any engine. Once the HP curve starts dropping at a given RPM, what's the point of going deeper in to the danger zone?

BTW, does anyone have the curves for the B3?