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Forum: Pontiac - Street 05-27-2020, 04:20 PM
Replies: 85
Views: 17,347
Posted By Burningbird
Steve, if I end up with changing the cam I will...

Steve, if I end up with changing the cam I will remove a couple of springs and measure the spring pressure.
Forum: Pontiac - Street 05-27-2020, 04:17 PM
Replies: 85
Views: 17,347
Posted By Burningbird
After some more testing, adjusting the carb and...

After some more testing, adjusting the carb and backed of the timing some I don't know if this cam will work with the old Hydramatic transmission. To get smooth engagement when shifting to drive or...
Forum: Pontiac - Street 05-26-2020, 06:01 PM
Replies: 85
Views: 17,347
Posted By Burningbird
The 389 is finally alive! Breaking in the cam...

The 389 is finally alive! Breaking in the cam went fine even with 135lbs seat pressure. The idle is a little rough at 800rpm but not extreme. Rpm in gear is 550rpm and vacuum is 14in/hg in...
Forum: Pontiac - Street 05-06-2020, 05:46 PM
Replies: 85
Views: 17,347
Posted By Burningbird
Thanks Jay! I remember you wrote about that...

Thanks Jay! I remember you wrote about that souped up Bonneville before, really cool car! Good point on those V-max Rhoads lifters if the cam is too big for the heavy car. I will update as soon as...
Forum: Pontiac - Street 05-04-2020, 04:52 AM
Replies: 50
Views: 7,272
Posted By Burningbird
Thanks Steve! Finally the engine is coming...

Thanks Steve! Finally the engine is coming together again.
Forum: Pontiac - Street 05-04-2020, 04:43 AM
Replies: 50
Views: 7,272
Posted By Burningbird
I don't think so. The bores in a 455 is larger...

I don't think so. The bores in a 455 is larger and the valves/chamber on 67 and up heads are more centered in the bores. The 350's needs the noches because of the small 3.875" bore.
Forum: Pontiac - Street 05-02-2020, 03:10 AM
Replies: 85
Views: 17,347
Posted By Burningbird
The engine is already in the car. Maybe the cam...

The engine is already in the car. Maybe the cam is too big, time will tell. What helps is the Hydramatic transmission with really low gears. With 3.08 in the back and the first 3-gears in the...
Forum: Pontiac - Street 05-01-2020, 07:34 PM
Replies: 50
Views: 7,272
Posted By Burningbird
The chambers and porting in both heads are...

The chambers and porting in both heads are finished, the and notches in the bores are cut. Just assembly left.
Forum: Pontiac - Street 05-01-2020, 01:49 PM
Replies: 85
Views: 17,347
Posted By Burningbird
Thank you for all the good information Jay. The...

Thank you for all the good information Jay. The heads have hardened exh. seats installed. I weighed the valves and the exh. valve is quite a bit lighter, 234grams vs 289grams for the intake valve. I...
Forum: Pontiac - Street 05-01-2020, 07:31 AM
Replies: 85
Views: 17,347
Posted By Burningbird
I assume the first cam was the Crower 60919? The...

I assume the first cam was the Crower 60919? The Voodoo 703 only has .495"/.505" lift with 1.52-rockers but has steep ramps. After break in the Lunati springs should have approximately 125lbs/305lbs,...
Forum: Pontiac - Street 05-01-2020, 07:14 AM
Replies: 85
Views: 17,347
Posted By Burningbird
I plan to drive this car at least 3000 miles a...

I plan to drive this car at least 3000 miles a year so I don't wan't a cam that wears out in a couple of years. I won't rev it past 5500rpm so maybe I should lower the spring pressure to 120lbs on...
Forum: Pontiac - Street 05-01-2020, 04:37 AM
Replies: 85
Views: 17,347
Posted By Burningbird
Steve C did comment that Paul Carter recommends...

Steve C did comment that Paul Carter recommends 130-135lbs closed and 330-340lbs open for the Voodoo cams (with 2.11/1.77 valves?). My heads are not assembled yet so I can increase the install height...
Forum: Pontiac - Street 05-01-2020, 03:44 AM
Replies: 50
Views: 7,272
Posted By Burningbird
Thanks for the advice, I will cut the notch in...

Thanks for the advice, I will cut the notch in the bores today.
Forum: Pontiac - Street 04-30-2020, 08:15 PM
Replies: 85
Views: 17,347
Posted By Burningbird
Thanks for the replies Cliff and Steve. If the...

Thanks for the replies Cliff and Steve. If the springs lose around 10lbs after break in I get 128lbs on the seat and 308lbs at max lift. I could remove one 0.015" shim to get 1.600" IH and have...
Forum: Pontiac - Street 04-30-2020, 02:49 PM
Replies: 85
Views: 17,347
Posted By Burningbird
I had to shim the Crower springs down to 1.515"...

I had to shim the Crower springs down to 1.515" IH (2×0.060" shims) to get 130lbs on the seat and 302lbs at 0.500" lift with only 0.065" from coil bind. So I ordered the Lunati 73949 springs instead....
Forum: Pontiac - Street 04-28-2020, 08:44 AM
Replies: 50
Views: 7,272
Posted By Burningbird
The short turn has been polished with a strip of...

The short turn has been polished with a strip of belt sander as you described. What grit should I use when polishing the Exh. ports?
Forum: Pontiac - Street 04-27-2020, 04:10 PM
Replies: 50
Views: 7,272
Posted By Burningbird
One head is finished and I hope I will get the...

One head is finished and I hope I will get the other one done this week. I also ordered Lunati 73949 valve springs, the Crower 68404 I had was to soft if I diden't shimed them down to 1.520" IH.
Forum: Pontiac - Street 04-25-2020, 01:38 AM
Replies: 50
Views: 7,272
Posted By Burningbird
Yes. It's Icon IC9946 forged pistons, not the...

Yes. It's Icon IC9946 forged pistons, not the cast 8VR pistions. I choosed those so I can use aluminium heads or big valve heads later if I want to, plus they have a 10.8cc dish.
Forum: Pontiac - Street 04-24-2020, 02:28 PM
Replies: 50
Views: 7,272
Posted By Burningbird
More pics of the exh. port.

More pics of the exh. port.
Forum: Pontiac - Street 04-24-2020, 02:25 PM
Replies: 50
Views: 7,272
Posted By Burningbird
77 Trashcan, the shortblock is already installed...

77 Trashcan, the shortblock is already installed in the car. The only thing I can use as a reference is the head gasket shown in post #16.

Those chambers look exellent b-man, wish I had more time...
Forum: Pontiac - Street 04-23-2020, 11:27 PM
Replies: 50
Views: 7,272
Posted By Burningbird
The last cut I did was from the intake valve...

The last cut I did was from the intake valve towards the spark plug. Should I grind more?
Forum: Pontiac - Street 04-23-2020, 05:10 PM
Replies: 50
Views: 7,272
Posted By Burningbird
Thanks for the info Steve! Even if it's just a...

Thanks for the info Steve! Even if it's just a 10hp gain I don't want to leave that on the table when it is for "free". I will try to block of one bore at a time and seal everything else up. Ported...
Forum: Pontiac - Street 04-22-2020, 05:01 PM
Replies: 50
Views: 7,272
Posted By Burningbird
I ended up with 9.67:1 with 70cc chambers and I...

I ended up with 9.67:1 with 70cc chambers and I think thats fine with the Voodoo 703 cam. Nice work with those #93's, I think they came from factory with 68cc chambers so I can understand that it...
Forum: Pontiac - Street 04-22-2020, 02:19 PM
Replies: 50
Views: 7,272
Posted By Burningbird
Steve, now I see why I should have notched bores...

Steve, now I see why I should have notched bores for the intake valve...
Forum: Pontiac - Street 04-22-2020, 01:54 PM
Replies: 50
Views: 7,272
Posted By Burningbird
The shortblock is already in the car so it's too...

The shortblock is already in the car so it's too late to make a notch in the bores now. Why can't I open up the chambers any more? I did do most of the cutting against the center of the bore. Just...
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