what can you go with?
ive heard numourous times from very good sources that stock stuff can take it and I personally believe it (as ive one pretty high on stock stuff)BUT there have been some posts about the retainers cracking.. titanium ones are even worse..
so, really im asking for more input..is stock(itr/b16 ) stuff alright for 9k rpm shifts?
(personally i say yes but i do have some doubts now) any inputs is appreciated

 

dude, check out the post a couple under this.....9200 rpm misshiffed....
Why would you whant to shift at 9200 rpm on a bone stock motor, no power up there........

 

well for one,..i wont be bone stock.
2..
ive seen and heard of many who have revved the snot out there stock motors.
i for one have taken mine up to 8700 rpm for ***** and giggles and its fine. ive even mis shifted and the revs flew to i dont even know what and the motor is still strong. i know they can take it! its just in the last month or so all these "cracking retainers at 9k" threads seem to be popping up.
just checked that thread...dude mis shifted..im not talking about that.
i want to know what people think of going up there.
i see no problem but am looking for more opinions


[Modified by SiRkid, 6:51 AM 1/28/2003]

 

The question is....

Is there a need to rev that high? On stock cams, you won't make any more power above redline.

If you absolutely must rev that high with a stock setup, I'd say to find yourself some ITR cams, springs, retainers, etc.

 

the block can handle it, but your valvetrain cant.
springs, retainers, and aftermarket timing belt u might wanna consider

 

i second that..

adaM

 

are titanium retainers a must for 9.5K or just aftermarket valve springs?

 

Before I knew anything, I had a Mugen chip ecm. I had upgraded the springs and retainers but still had stock cams. The bottom end was balanced and blueprinted... nothing more. I went to 9.5k daily for about a month. Nothing happened. All that on a B16. HTH!

 

yea but remember u werent making power up that high. and to the guy who started the thread there might have been posts about titanium retainers dying but remember they are made for valvetrain weight reduction and strenth. they are also made to only last a SINGLE race then be torn down and replaced. so when you see people with the bust at 15k or 20k miles that will tell you right there why. i have ti retainers and when i put my pistons in i am going back to the stock retainers for my skunk 2 valvesprings...the ti retainers arent needed for how high im reving (8800).

 

you must have springs and retainers or the stock springs will weaken after time and then they will coil-bind and the valve will detroy your piston. This happened to me when I was shifting at 9k, the motor only lasted 9kmiles and when the springs coil binded, everything was destroyed internally. I salvaged the crank, rods and titanium retainers but even the cams were #$%^ed. Just spend the extra 250 and get crower springs and retainers.

 

upgraded/aftermarket retainers are not necessary.

Roger Foo used ITR oem retainers on his Speedvision car.

That is fine for 9500 rpm use, the only benefit of titanium retainers is that they are lighter, providing less resistance on the valvetrain and reducing the chance distance of any vlave float. The bad part is that titanium retainers are a race part, and must be inspected for wear every 20k miles, maybe 30k. People on this board have experienced retainer failure with both titanium AND with stock retainers.

 

i was looking for other opinions..thanks.
dont worry, ill be making power up there! (even on stock cams)
i know stock valvetrain can take it,, i just wanted some other opinions.
for a b16 head all you need to do is get itr intake stuff and just switch the b16 intake to exhaust side(As they are the same as itr exh) and put itr intake stuff(retainers and springs) on. done.
i know they can withstand 9k runs for a long time as MANY MANY MANY MANY people have done(incl many knowledgable people).
thanks for the input guys!

 

What don't you understand about B16 cams NOT making power above 7600?!

Revving that high is stupid and pointless. People do it just so they can say they rev to 9 grand.

Dumb IMO.

 

Doesn't it just make you sick?

 

how can u still make power on stock cams? you must know something that no one else knows...

 

Maybe he modded in the VTC from a 2002 SI.

 

If you've got boost, you'll make power to 11,000 rpm on stock cams. I made power all the way up to 9000 RPM on my JRSC'd b16A.

Sonny

 

i run my car on stock itr valvetrain to 9000 all the time.hell, the recall said i hit 9200 on the way home from work today.

 

[QUOTE dont worry, ill be making power up there! (even on stock cams)
[/QUOTE]

that's one hell of a trick.

 

if your motor can handle it...and you got the right stuff in it

 

I know people do it, and i've done it to.......
But I don't recommend it unless it's a true race car. Do the math on the piston speed at 9000 rpm. It is very high (the piston speed that is). If you don't know what piston speed is, do some research and educate yourself.
Mine yanked a wrist pin out of the bottom of the piston when decellerating from 9000 rpm. It turned the motor into a neat little pile of junk. Do you have a budget for that? And no, it didn't float a valve, break a valve stem or retainer, or even a rod. The aftermarket piston just couldn't live with that much tensile load at 9000 rpm.

 

It should be noted that if you use stock retainers they should be B18C retainers.
Some b16a retainers are made of a different material which is weaker.

 

for real just buy a b18c5 and you can do it whenever you want ,..... maybe if you buy an itr head you can do this....but im not sure

like a few other people posted ...... WHY?

 

even tho my name is irev210
i dont rev210

 

really?
last time I checked they have the same part numbers!
anyways..i can make power to 9k. you guys are so quick to jump the gun. ill be boosted.

s2k1. what pistons were you using?
ive never heard of that before. its not like im raising redline to 10 k from 8200.