i misshifted, hit like 11,000 rpm id say.. not really sure. It was a lot. i have upgraded valvetrain to portflow... so i thought id be okay. The car drove for like 5 more miles after i ddi this... so everything seemed fine. i am cruising at 4k rpm when the car starts losing power.. and then dies. I try to start it over and it wont start. It kinda goes like its going to ... then stops and wont start.

any ideas? Checked plugs, they're okay. cam gears are okay, cams are not broken.

-sam

 

11K? My usual response follows:

Bent valves bro.... even portflow will bend when they collide with the pistons

 

my intake cam was retarded 3 degrees... and i have stainless steel valves. I would have thought the car at least started.

 

good point. Im at a loss then.. check that you have fuel???

 

lmao i have fuel... i had race gas in too. ****.

 

Sorry to tell you this bro but you bent a valve. I did the same thing a long time ago. I did eventually start the car but that was after a good hour of trying to restart the car.(4 am is not a good time to bend valves on a mountain road) The car only restarted because after all of those tries to restart the car bent my bad valves into something resembling the stock shape. The bad part is your stainless valves may of snapped since stainless valves are more brittle then stocks.


[Modified by uc0083, 12:05 AM 2/14/2002]

 

i thought a car with bent valves would start at least. and did your car run after you you over revved? mine ran for like 4 or 5 miles after my overrevving

 

Yes it did. I bent the valve on the freeway going up to the mountain road racing a friend. I went for over 10 miles until it died after a tight turn on the mountain road. It would try to start die then it do it again and again. When it did finally start I could only use slight throttle or it would try to die again. I nursed it 20 miles to my friends shop luckily he was with us when we where going up to the road.

 

mine wont even start or idle at all.

 

check your timing belt, it may have jumped. also did you hear any noise when pulling over. might have spun a bearing and fucked up a rod. check the timing belt though, if its off, car will not even turn over

 

guess what, no matter what springs you have, if your belt isnt nice and tight,
the change in timing will bend your valves.

Its the RPM in conjunction with reversed cam timing is what bends the valves.

 

I see Sam also hasnt mentioned he has JUN3s also...not sure if that would make it worse in a case like this.

 

yup if you bent a valve you wont start. Chances are you bent alot of them, maybe at least one per cylinder, giving you no compression, thats why your car wont start. How do I know, i did the same thing. My VAFC read 9999 rpms. (thats where the vafc stops reading rpms. Hope you didnt drop a valve, that could mean major trouble, possibly damaging the block, head (if its not fugged up already).

 

im singing like a ****. hopefully its just head contained... so i can sell the block and get a b18b or something.

 

it was bent valves in case anyone cares. i can see one of them in cylinder #4 with the spark plug out!

 

sorry to here that . any word on how much

 

atleast ya know whats the damage, Sorry to hear...

 

hopefully the valve guides arent cracked

 

A cam company that tested those ITR with PortFlow inners said that the outer springs (ITR) begin bouncing like crazy at 9200 rpm on their spintron machine. That's why that spring combination is deadly for engines running higher than that. The normal Crower springs aren't stable at those rpms either.
Stainless valves bend just as easy as stock ones, in fact some of them bend a lot easier.