my guess is valve train. any performance issues?
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02-26-2011
my guess is valve train. any performance issues?
02-26-2011
go full size ic or cam it just depends on hgow much work u wanna do
02-26-2011
Ok so i pulled all my plugs and they all looked good but i decided to swap em out with a set of colder plugs i had and noise is goneand no i didn't have any performance issues, when you have KR can you actually hear a difference. But i am gonna go with a full size and prolly smaller pulley... eventually
02-27-2011
Just got back from the track, I ran a 14.7 and am kinda disappointed, I did however beat a 2000 gt mustang that was all gutted, a 07 sti, and a pos crx lol dont know what they all had done to em. But my noise is back now, should i just pull the motor tear it back down and check out the bottom end or just run it till it blows and get a new block?
02-27-2011
sounds like you got something effecting performance.. Id check your valve train, Rockers set right?
02-27-2011
Is there a certain way to set them i just tightened em down then torqued them to 11 pounds then did the 90 degree past that.
I dont really know that much about motors yet lol im learnin tho
Oh ya I dont have any check engine lights, just thought id mention
02-27-2011
So...you had a tapping noise and went to the drag strip?
What are you exact mods? Any knock? Have a tune? Kinda hard to diagnose over the internet with little to no info there.
02-27-2011
All my mods are listed in my first post but here they are again. cnc ported heads with 105# valve springs, machined lower intake manifold then i ported and polished it, and also machined and ported my supercharger, 3.4 pulley, and zzp pcm, no custom tune tho speed daddy headers with a 3in dp ubend delete, no cat but a o2 sim and a short autozone intake.
I dont really know how to tell if I have knock it usually runs really smooth.
And i went to the drag strip cuz the noise went away after i changed out all my plugs and my friends really wanted me to go and run my car i was really nervous, then i was like eh if it blows it blows lol not too smart I know
Last edited by Shang TI; 02-27-2011 at 08:01 PM.
02-28-2011
Can you take a video of the noise? im pretty sure your rockers are too tight or too loose in some places.
02-28-2011
and yes theres 2 ways to set rockers, 1 with the car off and 1 with the car on. How ever with the way the motors sit in grand prix i think you will be forced to do it with the car off.
02-28-2011
YouTube - Valve Lash Adjustment Video - Engine Building Car Repair DVD
watch this, since your car has already been running don't worrie about doing it in the firing order.
02-28-2011
That is one of the vids i watched when i put my motor back together, im going to check it out tomorrow just to make sure though.
03-01-2011
Rocker bolts are tightened to 11ft-lbs, then an additional ¼ turn.
http://www.streetfire.net/video/2001...ynp_208097.htm
03-02-2011
Ya thats what I did
03-02-2011
get a vid it will help greatly also for mods once you get this sorted out u shouldnt down size pully just do the cam or ic but run more timing also with your setup you should be running faster the 14.7 that seems sorta slow so u must have knock or somthing is wrong
03-02-2011
Thats what I was sayin lol I have a friend who has hp tuners ill have to see if he can help me out with my tunage
03-02-2011
+1 get a video up, and yeah get your buddy to scan it with you. No more track runs untill you figure out the knock otherwise you will be doing it all over again.
Is it more of a ticking noise? or a knock and is it fast paced or slow.
03-02-2011
I bet he didn't clean the bolt holes and he has a loose rocker.
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