So I'm at a stop light and I'm signaling the person next to me that I intend to get over in their lane. We are both at the front. Prior to getting to the light, this person kept speeding up to block any chance I could to get over. So I figure I'm going to have to step on it on green to get passed them.
Light turns, we go...
SHE...in a LEXUS SUV...woops me.
I have to slam on the breaks, tuck my tail between my legs and move in behind her...
I realized a few things this afternoon.
1- I need a lot more power
2- Moms in SUV's can be a force to be reackoned with
and 3- I couldn't get passed her partially because I kept hitting my redline far quicker than I had ever anticipated.

So, for any and all techs and mechs out there...
What can we do to raise our Redline. I'm talking about heads of course.

The S/C is coming this summer so I will have the power, I just don't want to be shifting every 2 seconds...

 

deal with it

 

if you want more POWER, then u should have get the turbo, not S/C

 

Moms in suvs with v8 on powertrips haha (thats actually my mom Lexus v8 suv) but anyways. Raising redline is not the answer, get an automatic if you dont like shifting. Opt for more power and better traction (supercharge/turbo) better tires and suspension. My goal is to beat my moms suv (sounds sad doesnt it)

 

what kind of suv's are u racing? i want head to head with a ls430 probably around a 00 the otherday from 10mph on and i was with him til 70, and i didnt launch

 

I wasn't racing. Getting a S/C for the daily driver aspect and I didn't have a problem with traction, launch or anything else.
I think I need to post this elsewhere...

 

Back to my original question...
What kind of head work can or has been done with our cars???

 

The first step to increasing the redline would be to either get the ECU reprogramed or go with some form of engine management that allows you to remove the factory rev-limiter. You would then need to beef up the valves in the head, swap for different valves, springs, etc in the head. This would properly increase your redline.

What you need to keep in mind though, is that raising the redline will not necessarily help you. Your motor, in its current state, may not necessarily make any more power at higher RPMs. Toyota motors are generally torqy but actually start to lose power as you go up in the power band!

What would help you more than increasing the redline, would be to throw on some power adders to actually make more usable power in the powerband that you currently have.

 

Yep! Take a look at the stock tC's powerband; after 160 hp @ 6250 or where ever, the tq curve drops off sharply.

 

the tC's bore and stroke is way too large to increase the redline. You just run out of steam at those higher RPM's, and you run the risk of blowing up the block.

Smaller cylinders > Bigger Cylinders
when it comes to raising redlines.

 

raising the redline is definitely not the answer. i've found that its actually better to shift around 5200-5500 rpms. this is where the torque curve and hp curve intersect on the tC's dyno chart where you have the most hp per ft-lbs of torque. after that you wont gain speed as fast as you would if you had shifted

 

much better info than what I was getting earlier.
I knew about the cylinder size but I didn't know that the bore and stroke was too large.
I talked about raising it because I read an article which dynoed a S/C and they concluded that had the redline been raised just another 500 rpms, they could have easily reached another 10 horses.
food for thought...

 

I feel you jam0321 i have the same problem as you i hate that 6200 red line and i have turbocharger on mine so i have to shift every second but i learn how to deal with it already
last week i drove the new civic si that sh... goes to 8200 the red line imagine that that car at 6200 wich is our red line the vtech just stared to work so at 8200 is the best on that but on torque that car sucks cause only has 132 torque so sometimes you get pros and conts

 

yea, im all for the smaller cylinders! v8 SHO=3.4...SVT Contour= 2.5, both these cars run pretty good, but its funny cuz i hate ford, but like these cars, since i owned the contour and a friend with the tauraus, but the v8 was a Yamaha, and the v6 was a mazda originally designed by Porsche. i met some "know it all" that owned a grand am gt or something, was saying hed rather have the same size v6 over v8, because "bigger pistons". WTF, this guy cracks me up. but, ya, anyways, redline isnt gonna change. the money and effort to tune the engine to go higher will exceed the amount it takes to build a strong motor and add F/I, which you would do on either one anyway, and the first option will be the winner anyway, stronger motor=more boost=faster! weeeeeeeeeeeeeee

 

You need to get what you call an ecu re-flash, can be done for about $400-500 bucks, don't know if any one has done it hear yet

 

If you were to raise the rev limiter from 6250 to 7500, you'd be putting somewhere upwards of 150% more stress on the engine at 7500rpms than at 6250. Its not meant for those high RPMs.

 

HUNH?

So your telling me my s/c doesnt have more power than stock??

Last I thought both gave more power.
So if you want more power get either one. Research the pros and cons. But remember if you want more POWER, both will give it.

 

$3600=supercharger. Problems all gone. Except for light wallet.

 

just thought i would trow in that that its 160 hp @5,700...i'm not happy to find out either but thats the official #

 

No one has ever cracked a Toyota ECU that I've heard of. The MR2 folks are still trying to get past their ECUs. If you're talking about the supercharger reflash it won't do anything for speed on a NA car unless you get some other power adders. Although I do wonder, does the TRD reflash raise the redline? It does on the Matrix and Celica.

Anyways, the supercharger does shift the entire powerband to the right. If you look, the SC doesn't make maximum boost until about a hundred or so RPM before the current redline. The thing is though, supercharger boost is RPM dependent so technically, if you raise the power to 12,000 RPM you'll get some good boosting. I suspect the problem is in the head. I bet it's simply too restrictive to make good power that high in the RPM band. The only way it does is through boost which overcomes the restriction. By doing the entire head job you could very well realize gains through raising the redline.