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Messages - blown1
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31
« on: June 09 2017, 06:04:26 PM »
anyone have any experience.
on my GN powered,77 skyhawk, anything below 1/2 tank, and car dies at stop signs, turns, etc.
was thinking of making a baffle for the tank,
heard of holley hydramat,
sound to good to be true.
32
« on: April 07 2017, 10:00:00 AM »
using a .060 shim, under the spring, I'm getting 98 lbs @ 1.73in
that allows me sufficient room for coil bind, and achieves a lot better spring pressure.
I'll have to see what open pressure is, as I just did a quick check on this.
I doubt this car will ever see a drag strip, in the 17yrs I've owned it , it has never been there.
thanks for all the help you guys have offered,
33
« on: April 06 2017, 09:50:54 PM »
stock spring rate is 80lbs @ 1.72
what would anyone recommend?
and what about open, or @ .472 ?
the springs I have are new/ stock springs.
34
« on: April 06 2017, 10:23:32 AM »
using my wife's postal scale (it s all I have)
SS int valve......3.5 oz
SS exh .............3 .4oz
stock int........... 3.7oz
stock exh.........3. 5oz
new stock in.....3.7
stock retainer .... .7
aftermarket ret.. .7
35
« on: April 06 2017, 10:06:50 AM »
sorry for the double post,
suddenly part of the post dissapeared?
36
« on: April 06 2017, 10:06:05 AM »
well, right now I'm leaning toward a hyd flat tappet cam,
the roller rockers are such a pain in the butt, (valve cover actually)
so with that in mind.
installed ...1.730
coil bind....1.121
lobe lift......in-.280/ex-.295
rocker ratio...1.55
seal to guide.......76 4 (actually guide to retainer) seal is approx .060 thick)
seat 85lbs@1.730" class="bbc_email">pressure...... 85lbs@1.730
open/ nose pressure... didn't measure, advertised is 250lbs@.500
lobe lift is advertised at- int-.280 and exh .295, cam card reads valve lift int .448, exh .472,
when you do the math.... it is not the same ? int -.280x1.55=.434, exh -.295x1.55=.457.
valves are ferrea stainless steel, standard length, under cut, 1.77 int, and 1.51 exh
not sure of the weight, but will know in a bit, (I'll weigh them)
37
« on: April 06 2017, 10:02:02 AM »
well, right now I'm leaning toward a hyd flat tappet cam,
the roller rockers are such a pain in the butt, (valve cover actually)
so with that in mind.
installed ...1.730
coil bind....1.121
lobe lift......in-.280/ex-.295
rocker ratio...1.55
seal to guide.......76 4 (actually guide to retainer) seal is approx .060 thick)
seat
38
« on: April 05 2017, 02:41:46 PM »
cut all the guides down to .675 tall, i used a .500 OD cutter , also have a .530 OD cutter (two most common for seals)
measured the different retainers, installed on my heads stock retainers are 1.730
the steel after market retainers installed a 1.675.
measured the ID, and seal OD, seat dia,
coil bind, seat pressures, open pressures,
with and with out shims, and....... travel available between ret and top of guide,
whew, anyone think of anything else to measure?
next......... push rod length,
39
« on: April 05 2017, 11:08:11 AM »
not sure on lifter damage, haven't torn em down yet,
Robert... I'm sure your not the only one kicked back, watching the stupidity unfold.
I have no idea why I didn't cut the exh guides when I did the intake guides.
there was no rush , or time frame for me to get this done, so I do not have any excuse for
not doing it correctly, I could say it was old age, making me forgetful, (I'm 68)
but for some reason , it didn't occur to me to do them both, DUH.
oh well, live an learn,
40
« on: April 04 2017, 03:38:59 PM »
OK.......... I'll admit I F'd up ........
I believe I found the issue.
tore the heads apart and found smashed seals, didn't have that issue before adding 1.65 rockers,
and marks on the exh guides (which I did NOT cut down)
puzzling? well it seems when I was doing set up, I used the stock Buick retainers, and everything looked good,
when I assembled I used new fancy retainers, and...... there almost .100 lower,
so spring pressures were thru the roof, or in my case , thru the rockers.
and add in 1.55, to 1.65 ratio rockers, and everything is screwed!
that explains why the rocker bolts were breaking (beside cheap bolts)
the exh retainers were hitting the top of the guide, snapping off bolts, rocker shafts, making
spears out of pushrods!
so after cleaning up will start over , and CHECK EVERYTHING!!!!!!
thanks for all the suggestions, it did help, in that I am now believer in check twice, or 3 or4 times, and
assemble once!
41
« on: April 01 2017, 04:50:12 PM »
took it apart, slowly looking for anything out of place or odd.
nothing, except broke another rocker are bolt,
so, took some new ones I had and set the torque wrench at 30 lbs and snapped it off first pull,
this is 5/15 , broke at where threads end and solid bolt starts,
so tried another, this time at 25lbs, hit 25 , was ok, tried again, the head snapped off.
checked US recommended torque specs, 5/16, grade 8 is only 18 ft lbs
so....obviousl y chinese crap! I'm guessing they are equivalent to grade 3 , maybe?
but nothing out of the ordinary on the valve train, no wear marks anywhere, checked cam timing, spot on.,
no valve to piston marks,but valves sure are close together, again ,no marks.
lifters look new (they are) pushrods are spotless, no marks anywhere,
rockers show nothing,
regardless, going back to hyd flat tappet, and 80 lbs springs, (which I'll set up at 90 if possible)
and back to setting pushrod length, again!
42
« on: April 01 2017, 12:46:01 PM »
I thought the lock washer (when compressed) would spread the clamping load,
but, stock bolt do not use any washer at all, but do have a shouldered bolt,
I think I'm going to test some of the "grade 8" bolts I have, torque wrench and a vice, see what
values they require to snap off.
43
« on: April 01 2017, 11:04:08 AM »
on the grade 8 - 5/16 bolts the heads pop off, i thought maybe I was over tightening them .
but upon loosening them , was about 35lbs, (I say about ,as I didn't use a torque wrench)
I'm thinking that may be part of the problem.
I used a lock washer under the head, ,partly to hold it tight, and partly to spread the load.
the rocker spacers are made from a grade 5, 3/4 nut, reamed to size, the cut in half, with 5/16 hole
drilled in it, I matched it with the T&D factory spacers. same width,and ID.
44
« on: March 31 2017, 01:39:36 PM »
I mentioned the ad blocker issue to shane, and he told me to go away/ not visit TB.com if I didn't like it.
so.... I did, haven't been there in 6 months,
was getting so tired of the "know it alls" and arrogant turds on there,
and YES, I have "ad blocker" and will continue to uses it!
45
« on: March 31 2017, 10:44:43 AM »
1st, I'm a slow learner, and usually takes 1 or 2 times for me to get it.
I have a complete valve grind/ seat grinding equipment in my garage, including Rimac valve spring tester.
I cut these heads for 1.71 intake and 1.51 exh valves, using ferrea stainless "hi flow" valves.
I cut both valve guides down, (seals on intake only)
I tried various valve spring on these heads, started with 125 installed @1.72, and 310 @1.20, with 313lbs per in spring rate.
then changed to 105@1.72, and 280 @1.20 , and 285lbs per in spring rate
comp cams recommends 105@1.80and 293@1.20, with 313lb per in spring rate.
tried stock rockers (HD/thick shaft) broke rockers, and a shaft.
I have 7.950 pushrods, 8.00 push rods, and 8.050 push rods, all hardened ,
I tried all of them, no success.
I was using GM shim head gaskets, as I had about 20 sets stashed away, (.032 thick)
I thought I was careful in setup, as I used adj pushrod to get my preload on the lifters,
we've been with out power (elect) for the last 15hrs, had hi winds (60 mph gusts).
so I haven't been in the garage, to inspect this pain in my ass.
but time is my friend, as us old /retired grouchy old fucks have nothing else to do.
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