Help.......trex wont fit
05-03-2009, 02:24 PM
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Help.......trex wont fit Just puttin it in dot to dot and its hitting the valves, i have no clearance at all i cant even turn the motor over or it will bend a valve. What are you guys doing to get these to fit??????????????/ Is anyone running these with no problems on clearance????? I have a stock 01 ta with stock heads rockers etc. Whats going on?????????????????????
05-03-2009, 02:53 PM
#4
As far as I know, people have used those cams without flycutting.
So that means either your pistons stick outta the hole moreso than other LS1's, your push rods are too long, etc.
What head gaskets are you using and how thick are they?
What timing chain are you using? Is it adjustable at all, as far as advancing or retarding the cam? If so, are you 100% SURE its installed staight up? This could be the case, as it sounds like the cam may be installed advanced a few degrees which would make the intake valve open sooner.
So that means either your pistons stick outta the hole moreso than other LS1's, your push rods are too long, etc.
What head gaskets are you using and how thick are they?
What timing chain are you using? Is it adjustable at all, as far as advancing or retarding the cam? If so, are you 100% SURE its installed staight up? This could be the case, as it sounds like the cam may be installed advanced a few degrees which would make the intake valve open sooner.
05-03-2009, 02:55 PM
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7.400 pushrods. Something is screwed up here, i should have some clearance on the exhaust side atleast? I checked and double checked to make sure i wasnt off a tooth and im not, its dot to dot?? im lost
05-03-2009, 02:55 PM
#6
lol the trex is a healthy stick, it comes with all kinds of pisto to valve clearnce warnings,
are your dots pointed towards each other or when your crank dot is up the cam gear dot faces up as well? easy mistake to do,
are your dots pointed towards each other or when your crank dot is up the cam gear dot faces up as well? easy mistake to do,
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05-03-2009, 02:58 PM
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As far as I know, people have used those cams without flycutting.
So that means either your pistons stick outta the hole moreso than other LS1's, your push rods are too long, etc.
What head gaskets are you using and how thick are they?
What timing chain are you using? Is it adjustable at all, as far as advancing or retarding the cam? If so, are you 100% SURE its installed staight up? This could be the case, as it sounds like the cam may be installed advanced a few degrees which would make the intake valve open sooner.
So that means either your pistons stick outta the hole moreso than other LS1's, your push rods are too long, etc.
What head gaskets are you using and how thick are they?
What timing chain are you using? Is it adjustable at all, as far as advancing or retarding the cam? If so, are you 100% SURE its installed staight up? This could be the case, as it sounds like the cam may be installed advanced a few degrees which would make the intake valve open sooner.
05-03-2009, 03:14 PM
#10
Damn man, I just realized (after I thought your last name sounded familiar) that you are the guy with the blue Firebird from the brothers PINKS episode, my favorite one of all. So I know your no newb when it comes to motors.
I know its not what you want to hear man, but it really sounds like the pistons need flycutting to me. I wouldve thought the exhaust valve wouldve cleared b/c of it being smaller but if its hitting as well...thats not good.
As much as I hate to say it, I think its time to pull a head off and put some silly puddy on the piston and check to make 100% sure its hitting.
I know its not what you want to hear man, but it really sounds like the pistons need flycutting to me. I wouldve thought the exhaust valve wouldve cleared b/c of it being smaller but if its hitting as well...thats not good.
As much as I hate to say it, I think its time to pull a head off and put some silly puddy on the piston and check to make 100% sure its hitting.
05-03-2009, 05:17 PM
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got the cam used from a tech memeber, and the box says 244 250 on top and on the side its says 242 248 with the lift being 611 614 and ground on a 109.5. Im not sure guys this should not be hitting this bad, and the guy i got it from had it in a stock headed car also???????????/ im confused.
Yes i have the blue firebird from pinks, its sitting in the garage next to the ta,lol.
And yes the dots are pointing together, i did not have th cam gear dot on top its on the bottom meeting the crank gear dot.
as far as the lifters, that could be i guess BUT i have done cams before in these cars (none this big but) and had no problems with the lifters bleed down then.
Guess ill just have to trade this for something else
Yes i have the blue firebird from pinks, its sitting in the garage next to the ta,lol.
And yes the dots are pointing together, i did not have th cam gear dot on top its on the bottom meeting the crank gear dot.
as far as the lifters, that could be i guess BUT i have done cams before in these cars (none this big but) and had no problems with the lifters bleed down then.
Guess ill just have to trade this for something else
05-03-2009, 05:19 PM
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Damn man, I just realized (after I thought your last name sounded familiar) that you are the guy with the blue Firebird from the brothers PINKS episode, my favorite one of all. So I know your no newb when it comes to motors.
I know its not what you want to hear man, but it really sounds like the pistons need flycutting to me. I wouldve thought the exhaust valve wouldve cleared b/c of it being smaller but if its hitting as well...thats not good.
As much as I hate to say it, I think its time to pull a head off and put some silly puddy on the piston and check to make 100% sure its hitting.
I know its not what you want to hear man, but it really sounds like the pistons need flycutting to me. I wouldve thought the exhaust valve wouldve cleared b/c of it being smaller but if its hitting as well...thats not good.
As much as I hate to say it, I think its time to pull a head off and put some silly puddy on the piston and check to make 100% sure its hitting.
05-03-2009, 05:30 PM
#17
got the cam used from a tech memeber, and the box says 244 250 on top and on the side its says 242 248 with the lift being 611 614 and ground on a 109.5. Im not sure guys this should not be hitting this bad, and the guy i got it from had it in a stock headed car also???????????/ im confused.
Yes i have the blue firebird from pinks, its sitting in the garage next to the ta,lol.
And yes the dots are pointing together, i did not have th cam gear dot on top its on the bottom meeting the crank gear dot.
as far as the lifters, that could be i guess BUT i have done cams before in these cars (none this big but) and had no problems with the lifters bleed down then.
Guess ill just have to trade this for something else
Yes i have the blue firebird from pinks, its sitting in the garage next to the ta,lol.
And yes the dots are pointing together, i did not have th cam gear dot on top its on the bottom meeting the crank gear dot.
as far as the lifters, that could be i guess BUT i have done cams before in these cars (none this big but) and had no problems with the lifters bleed down then.
Guess ill just have to trade this for something else
I think you have the wrong cam. the trex is 608/612 lift. Just call Thunder tomorrow and ask them but I am sure that as long as you have stock heads there is no ptv issue.
05-03-2009, 05:58 PM
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no i need alot of these 