Pwnage's 383 Build (Pics!!)
08-19-2011, 11:11 AM
#381
Burning Brakes
Member Since: Nov 2010
Location: Spartanburg South Carolina
Posts: 995
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If it were me, I would buy the correct rockers.
But, I would not grind them, but I might use and the side of an end mill with desired radius to touch of the side of the end mill to make @ .005" clearance.
You don't want to create a spot for a stress fracture with a grinder,, JMO
But, I would not grind them, but I might use and the side of an end mill with desired radius to touch of the side of the end mill to make @ .005" clearance.
You don't want to create a spot for a stress fracture with a grinder,, JMO
cause thats just the way i am! How much did those rockers cost you? Before you mod anything may consider selling them to offset your cost of new ones
http://www.summitracing.com/parts/CCA-19005-16/
08-19-2011, 11:59 AM
#382
Race Director
I personally have taken so many chances that came back to bite me and cost twice or three times what doing it right would have cost.
So my motto now is, Half right is All Wrong,
or something to that affect.
So my motto now is, Half right is All Wrong,
or something to that affect.
08-19-2011, 01:31 PM
#383
Tech Contributor
Thread Starter
Can I shim the rocker so it sits higher?
Edit.
Just called Skip White cause that's where I bought the rocker from.
Talked to one of their technicians. He said that I could grind them, and it shouldn't really weaken them too much. He said I just need about .010" of clearance between the retainer and the rocker.
The rockers were on the cheaper side.
Any more opinions before I grind them
Edit.
Just called Skip White cause that's where I bought the rocker from.
Talked to one of their technicians. He said that I could grind them, and it shouldn't really weaken them too much. He said I just need about .010" of clearance between the retainer and the rocker.
The rockers were on the cheaper side.
Any more opinions before I grind them
Last edited by Pwnage1337; 08-19-2011 at 01:52 PM.
08-19-2011, 04:29 PM
#384
Safety Car
Sometimes they hit there. It's not a big deal. Grind it.
Done properly it won't hurt anything. Grind clearance in the rocker body with a burr and then polish the area with a cartridge roll. It'll be fine.
When your done make sure it clears through out the rockers travel.
Will
Done properly it won't hurt anything. Grind clearance in the rocker body with a burr and then polish the area with a cartridge roll. It'll be fine.
When your done make sure it clears through out the rockers travel.
Will
08-19-2011, 08:57 PM
#385
Tech Contributor
Thread Starter
Valve/Piston clearance without headgasket.
Exhaust rocker pattern with 7.2" pushrod. Is it normal for it to be a bit offset to the right the way it is?
Intake rocker pattern with 7.2 inch pushrod. This picture is a bit deceiving because it is not taken on a straight on angle. Basically looks just ilke the exhaust rocker pattern.
Intake valve lift
Exhaust valve lift
Last edited by Pwnage1337; 08-19-2011 at 09:00 PM.
08-19-2011, 09:22 PM
#386
Safety Car
It really looks like your .050 to .100 too short on the pushrod -
I know you thought you were done but pattern it at 7.250 and 7.300 and post up the pics......
That pattern is really wide as well, which tells me the rocker is over arching... could be from the short pushrod and could be just because the rockers trunion is too low in releation to the roller tip.
I'll know after you re pattern it.
Will
I know you thought you were done but pattern it at 7.250 and 7.300 and post up the pics......
That pattern is really wide as well, which tells me the rocker is over arching... could be from the short pushrod and could be just because the rockers trunion is too low in releation to the roller tip.
I'll know after you re pattern it.
Will
08-19-2011, 09:23 PM
#387
Melting Slicks
are you checking all this geometry with the heads and head gaskets all torqued down so the proper height has been set?
AND when you check all this geometry are you trying to do it with a stock lifter? This will NOT work.
WHY ? because the stock valve spring will shove the piston/plunger to the bottom of the lifter body and everything becomes meaningless.
SO purchas a special light weight spring designed just for checking valve train geometry and install it in place of the stock valve spring and do your tests.
OR, (my favorite), take an used lifter apart; put a stack of small washers into the lifter body under the plunger body so the plunger cannot be forced down into the lifter body; reassemble and use this (now solid) lifter for checking your valve train geometry.
AND when you check all this geometry are you trying to do it with a stock lifter? This will NOT work.
WHY ? because the stock valve spring will shove the piston/plunger to the bottom of the lifter body and everything becomes meaningless.
SO purchas a special light weight spring designed just for checking valve train geometry and install it in place of the stock valve spring and do your tests.
OR, (my favorite), take an used lifter apart; put a stack of small washers into the lifter body under the plunger body so the plunger cannot be forced down into the lifter body; reassemble and use this (now solid) lifter for checking your valve train geometry.
08-19-2011, 09:27 PM
#388
Safety Car
are you checking all this geometry with the heads and head gaskets all torqued down so the proper height has been set?
AND when you check all this geometry are you trying to do it with a stock lifter? This will NOT work.
WHY ? because the stock valve spring will shove the piston/plunger to the bottom of the lifter body and everything becomes meaningless.
SO purchas a special light weight spring designed just for checking valve train geometry and install it in place of the stock valve spring and do your tests.
OR, (my favorite), take an used lifter apart; put a stack of small washers into the lifter body under the plunger body so the plunger cannot be forced down into the lifter body; reassemble and use this (now solid) lifter for checking your valve train geometry.
AND when you check all this geometry are you trying to do it with a stock lifter? This will NOT work.
WHY ? because the stock valve spring will shove the piston/plunger to the bottom of the lifter body and everything becomes meaningless.
SO purchas a special light weight spring designed just for checking valve train geometry and install it in place of the stock valve spring and do your tests.
OR, (my favorite), take an used lifter apart; put a stack of small washers into the lifter body under the plunger body so the plunger cannot be forced down into the lifter body; reassemble and use this (now solid) lifter for checking your valve train geometry.
He is using my P/V, rocker geometry/pushrod length checking tools. The lifter is a factory hyd roller converted to a solid and a 6.8 to 7.8 adjustable pushrod.
Will
08-19-2011, 10:07 PM
#389
Tech Contributor
Thread Starter
are you checking all this geometry with the heads and head gaskets all torqued down so the proper height has been set?
AND when you check all this geometry are you trying to do it with a stock lifter? This will NOT work.
WHY ? because the stock valve spring will shove the piston/plunger to the bottom of the lifter body and everything becomes meaningless.
SO purchas a special light weight spring designed just for checking valve train geometry and install it in place of the stock valve spring and do your tests.
OR, (my favorite), take an used lifter apart; put a stack of small washers into the lifter body under the plunger body so the plunger cannot be forced down into the lifter body; reassemble and use this (now solid) lifter for checking your valve train geometry.
AND when you check all this geometry are you trying to do it with a stock lifter? This will NOT work.
WHY ? because the stock valve spring will shove the piston/plunger to the bottom of the lifter body and everything becomes meaningless.
SO purchas a special light weight spring designed just for checking valve train geometry and install it in place of the stock valve spring and do your tests.
OR, (my favorite), take an used lifter apart; put a stack of small washers into the lifter body under the plunger body so the plunger cannot be forced down into the lifter body; reassemble and use this (now solid) lifter for checking your valve train geometry.
The piston/valve clearance was checked with out a head gasket, because when I used a gasket, i could not get any impressions on the play dough. I did not do any geometry testing without a gasket.
Thanks again!
Jeremy
08-20-2011, 09:46 PM
#392
Tech Contributor
Thread Starter
Intake with 7.250"
Intake 7.300"
Exhaust 7.250"
Exhaust 7.300"
The difference between 7.250 and 7.300 isn't very identifiable to me, but my eye is untrained.
What do you guys think?
Intake 7.300"
Exhaust 7.250"
Exhaust 7.300"
The difference between 7.250 and 7.300 isn't very identifiable to me, but my eye is untrained.
What do you guys think?
08-21-2011, 12:53 AM
#394
Tech Contributor
Thread Starter
Will order pushrods and a few other misc items tomorrow. Any suggestions on these? Didn't know they were so expensive.
Will,
I will send your tools out to you on Monday.
Thanks a lot!
Jeremy.
Last edited by Pwnage1337; 08-21-2011 at 06:50 AM.
08-21-2011, 12:13 PM
#395
Safety Car
http://www.summitracing.com/parts/TFS-21407300/
Will
08-23-2011, 12:17 AM
#398
Tech Contributor
Thread Starter
I ordered the TFS too fast
Install oil pump/pickup/pan
Heads
Mod firewall to fit new harness
put interior back together.
c-beam/driveshaft
intake. i am going to install the base while its on the engine stand, and the rest when the motor is in the car.
grind the rest of my rockers.
pushrods
flywheel
torque converter.
injectors
and lots more
put engine in car.
install accessories/measure for new length belt. eliminating air pump without pulley.
then i need to do the headers/exhaust/tuning. probably going to have to drive it somewhere with open headers to get exhaust installed. i don't have a welder.
turn key and hope it doesn't explode.
Last edited by Pwnage1337; 08-23-2011 at 12:29 AM.
08-23-2011, 02:44 AM
#400
Burning Brakes
but honestly, I am discovering the above is true... you may end up redoing this job later in the future if one busts, and buying a new set of rockers anyways.
can you send them back and get the right part?