429 issues !!

QtrWarrior wrote:

FalconEh wrote:

QtrWarrior wrote:Ummmmm.

Pushrod length alone would not alter valve lift..
Only things that control the amount of lift are.. The cam lobe and the rocker ratio..
It would screw up the geometry big time

So why hasn't this motor smashed the valves and the push rods, the valve terrain goemetry has to be wrong, it can alter the lift IMO if it is the wrong length ie: too short, at peek lets say 6000 rpm when it misses the rocker lifts off the pushrod, the cam has enough in it, as do the springs and lifters so it doesn't float but it also never reaches maxium lift.

Ahhh No...

The pushrod only transfers movement.. If it is short enough to lose lift.. It would have spit it out by now..

Stood up for my opinion, but have been told...IDK!

QtrWarrior wrote:

FalconEh wrote:

QtrWarrior wrote:Ummmmm.

Pushrod length alone would not alter valve lift..
Only things that control the amount of lift are.. The cam lobe and the rocker ratio..
It would screw up the geometry big time

So why hasn't this motor smashed the valves and the push rods, the valve terrain goemetry has to be wrong, it can alter the lift IMO if it is the wrong length ie: too short, at peek lets say 6000 rpm when it misses the rocker lifts off the pushrod, the cam has enough in it, as do the springs and lifters so it doesn't float but it also never reaches maxium lift.

Ahhh No...

The pushrod only transfers movement.. If it is short enough to lose lift.. It would have spit it out by now..

Valve lift near Top Dead Center is where the least piston to valve clearance occurs and retarding that camshaft about 1 tooth, (near 16.5 degrees), would lessen that lift near Top Dead Center on the intake about .060", (or so), CAM LOBE lift at that point.

Put that dial indicator on that retainer , I'm curious what lift you come up with also.

FalconEh wrote:Not to hijack the post but Dfree your new profile pick ...did you end it and how big was is nice hog!

He was about 150# and yes I put him in the pot.

dfree383 wrote:

FalconEh wrote:Not to hijack the post but Dfree your new profile pick ...did you end it and how big was is nice hog!

He was about 150# and yes I put him in the pot.

You did huh ??

QtrWarrior wrote:

dfree383 wrote:

FalconEh wrote:Not to hijack the post but Dfree your new profile pick ...did you end it and how big was is nice hog!

He was about 150# and yes I put him in the pot.

You did huh ??

Well Dee did the pot part !

My older brother in Fla used to hunt Boar with Pit Bulls and they would yank them down by the ear , when I was 12 i remember his friend Paul Hutchinson coming over for some help getting a live one outta the trunk of his Caprice Classic , and I was terrified at the rocking side to side and the sounds and the big dents that creature was kicking into the trunk lid , we didn't stick around to watch , me and my buddies peddled our butts outta there quick

nuclearcobra wrote:Put that dial indicator on that retainer , I'm curious what lift you come up with also.

Ill grab my indicator and mag base from work tonight

dfree383 wrote:

QtrWarrior wrote:

dfree383 wrote:

FalconEh wrote:Not to hijack the post but Dfree your new profile pick ...did you end it and how big was is nice hog!

He was about 150# and yes I put him in the pot.

You did huh ??

Well Dee did the pot part !

linearfab wrote:

nuclearcobra wrote:Put that dial indicator on that retainer , I'm curious what lift you come up with also.

Ill  grab my indicator and mag base from work tonight

you hammered him...and as long as it make te pot that`s too!

I will be suprised if it measures .475`lift

I made sure to measure  the intake  side !   ( not an indicator  but itll do )

2.000 -  1.300  = .700      .738 intake lift - .024  lash= .714 ...  id  say  its  there !    ill give my  scaling  tolerance  +/- .030  


 but on a  side note ..  the throttle  cable  stretched and was  only  running on 2  barrels ... so that's  pretty annoying  .. gunna try it again this week at the track and see what happens  ...

open




closed

are all corbra jet heads different than iron heads with valve location/angle .. or is it only the kaase redesigned ones ? .

linearfab wrote: are all corbra jet heads  different than  iron heads   with valve location/angle  .. or is it only the  kaase  redesigned  ones ?   .

Aluminum SUPER Cobra Jet heads have different valve angles and locations and are the same valve placements as the later released Kaase P-51 heads; not the same as any Cobra Jet's.

rmcomprandy wrote:

linearfab wrote: are all corbra jet heads  different than  iron heads   with valve location/angle  .. or is it only the  kaase  redesigned  ones ?   .

Aluminum SUPER Cobra Jet heads have different valve angles and locations and are the same valve placements as the later released Kaase P-51 heads; not the same as any Cobra Jet's.

.
I see . Cool, thanks

linearfab wrote: i found an old  pic of the motor with out the  heads  .  Here's my diamond pistons for the aluminum SCJ heads compared to your valve angles.  

                       

Ya they are certainly different . Wish i had a bore scope so i could take a look in the cyl. I really hate to tear the motor completely down. Just to look at pistons that i already know about . Also hard to believe that both cams could of been installed. Way retarded both by different people woth out them mentioning shits screwed up . by the looks of it even with the cam way off. Itd prob still hit my pistons comparing the 2 motor pics . Id assume the valves would be drasticly bent or broken . . Car runs and revs fine . Not like it has a dead hole Or something no miss or Backfire through the intake or anything

Well I think for that thing to work that camshaft has some seriously Retarded timing to clear....


Hey Nuc is that your short block? if so why all the rust? I hope you clean that before you put it together...

Naaa not rust just stained iron It did make it look horrible in that picture tho

welp I  put a  bore scope  in the  cyl and  the pistons  are  the same as the day they were installed  back in the 90s  .   I discovered the throttle linkage  was out of  wack and was   only getting  a little over  half throttle . I  took it out  on the street to  see  how itd run with the   throttle corrected and  it  felt  much better and   the 6000 rpm  stumble is  gone  ..  taking it  to the track tomorrow so ill post some  times  tomorrow evening

Are you sure about the valve reliefs???

It still doesn`t add up, as was previously mentioned unless the timing is seriously retarded it should make contact with those valve reliefs...do you know the part number of the pistons The only reason I can think of that the pisons would Not contact the valves other than the timing is if there is stroker flat top pistons in the motor with a reduced CR height.

460bronco wrote:Are you sure about the valve reliefs???  

yep ... just as I was sure what heads I had .. id put money on it . ive talked with the builder that put the heads on the motor . and I looked at them with a bore scope today and they look just like the pic I posted of the motor . nothing like the pics ive seen with 2 reliefs or just the "scj" reliefs.

FalconEh wrote:It still doesn`t add up, as was previously mentioned unless the timing is seriously retarded it should make contact with those valve reliefs...do you know the part number of the pistons  The only reason I can think of that the pisons would Not contact the valves other than the timing is if there is stroker flat top pistons in the motor with a reduced CR height.

  yep L2366F-40

like i said ill post up tomorrow how it runs ... what do u guys think itll run ?

You need to invest in a degree kit, some clay and a couple of gaskets. You need to let us know how you are defying the laws of "the shit won't clear".....

I hate to call BS but I have messed with P-51 heads on dished conventional pistons and it would work with a small flat tappet...... But a roller of any size..... The laws of "that shit won't clear" is real......

How thick of a head gasket do u guys normally run .. also why would i get in here to ask for help. Then lie to everyone about what i have . I have a degree wheel. But i dont have a piston stop that will screw into the head i guess i can turn one on the lathe at work this week end. And degree the cam And see . I dont want to tear the heads off unless i know forsure the cam is way off. Which i Was there when it was installed and the dots wher lined up but not while he degreed it . But if it runs decent tomorrow (11.50 -11.60s). Im not gunna touch it .