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Messages - 63.5xl

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46
FE Technical Forum / Re: Head gasket decision
« on: December 24, 2015, 05:19:11 PM »
I had sent the distributor to Faron and he set the distributor  up for 36 total all in by 2900 and run 14 to 16 initial. What about the 270S. I have factory adjustable rockers, just for the old solid sound. With that low of DCR would it run on 89 octane or stick with 91?

47
FE Technical Forum / Re: Head gasket decision
« on: December 24, 2015, 04:51:35 PM »
Ok, I am adding things up and to spend that much money I am thinking I need to find another block. A fiend of mine thinks he know where there are a couple of std 390 blocks, so maybe put this money in a std block, if it need bored which it probably will I could do all this on a .030 block instead of a .060 block.
What could I do with what I got. Beside different pistons and more machine work, I could save the 291 cam for the other engine. Would one of comp cams worth with what I got better?

48
FE Technical Forum / Re: Head gasket decision
« on: December 24, 2015, 11:59:31 AM »
What do you have the ratios at now goin with the 2291 and the .027 gasket. Maybe the deck was only cut to .002 as as temporary put the crank, bearing and one piston in after and it measured .031 with the depth mic.
What formula are you using for the compression ratios Jay, so I can figure out myself next time without bothering you?
Thanks again for the help everyone and Merry Christmas!
Carl

49
FE Technical Forum / Re: Head gasket decision
« on: December 24, 2015, 10:07:16 AM »
Ok, I think I will get the 2291 pistons then, what about my fresh bore with the 2291 pistons since it was bored for the H304p cast? The good thing is that both pistons take 5/64 in. x 3/32 in. x 3/16 in rings which is what my hasting moly rings are.
Going with the 2291 piston what would be the ideal head gasket?

50
FE Technical Forum / Re: Head gasket decision
« on: December 24, 2015, 12:08:44 AM »
Bore is 4.110
Stroke 3.78
Rod 6.488
Pin   0.975
Head chamber  69cc
speed pro H304P has 1.759 compression distance and 12 cc and it measure .031 in the hole when I mocked it up.
And Yes the engine is still all apart. Only thing that is done to it is the block bored, block decked square and cam bearings installed.
What about the different piston, what do you guys recommend?  Maybe the L2291 speed with 10cc and a 1.776 compression height?
The flat top speed pro H395p is the same compression height as I have, 1.759, with 6cc.
The Keith Black I found were either Flat step or dish step except for the 1.760 compression height Keith black.
Thanks again for the help.
Carl

51
FE Technical Forum / Re: Head gasket decision
« on: December 23, 2015, 12:07:46 PM »
The guy who squared the deck on my block only took .005 he said, the piston I M using H304 P has 12cc dish and 1.759 compression, it measures .031 in the hole. The cam is from Scot at Cam Research:
      Hydraulic Camshaft data

Lift                           In 540 Ex 565
Advertised duration In 291 Ex 298
Duration @ .050       In 226. Ex 234
                 Valve Timing
                   Open.           Close
Intake      BTDC     8      ABDC   38
Exhaust.  BBDC   52     ATDC     2
 
Lobe separation       109
Intake centerline.    105

4 degrees advance built in
Install straight up


  Recommended Valve Spring Data
Installed Ht    1.800       Lbs   115
Open Ht         1.200       Lbs   315





52
FE Technical Forum / Re: Head gasket decision
« on: December 23, 2015, 12:27:09 AM »
I had the blocked decked just enough to to square it up, I am using this calculator,

https://www.uempistons.com/index.php?main_page=calculators&type=comp

It is asking for my intaking closing which is 38 degrees and add 15 to it so I am using 53. The .031 deck clearance I measured with the piston, a sealed power h304p that measures 12 cc of dish and I had my head cc'd and it come up to 69cc

53
FE Technical Forum / Head gasket decision
« on: December 22, 2015, 10:04:29 PM »
So I went to the united engine site and used their calculator with my cam info and come up with all the following head gasket info:
Running 91 Octane, the best we have here, in my 390 Galaxie, What would you go with? These are all with a 12 cc dish. If I go with a flattop it starts out with the .051 gasket at 9.879 static and 8.528 dynamic. These pistons are the 1.759 compression distance.
Changed gears since my last post. 3:70 gears, 29 inch tires, 4 speed

Brand           Compressed Thickness           Gasket Bore          Quench             Static Ratio              Dynamic Ratio
Felpro                        .051                              4.250               .082                    9.255                        7.999

Felpro                        .041                              4.4                  .072                    9.393                        8.116

Cometic                     .040                              4.250               .070                    9.473                        8.184

Cometic                     .040                              4.165               .070                    9.504                        8.210

Edelbrock                  .038                               4.4                  .069                    9.457                        8.171

Mr Gasket                 .038                               4.4                  .069                     9.457                       8.171

Cometic                    .036                               4.4                  .067                     9.501                       8.208

Cometic                    .036                               4.360              .067                     9.516                       8.221

Cometic                    .036                               4.250              .067                     9.553                       8.252

Cometic                    .036                               4.165              .067                     9.584                       8.278

Cometic                    .030                               4.4                  .061                     9.634                       8.321

Cometic                    .030                               4.250              .061                     9.679                       8.359

Cometic                    .030                               4.165              .061                     9.705                       8.381

Cometic                    .027                               4.4                  .058                     9.702                       8.378

Cometic                    .027                               4.250              .058                     9.744                       8.414

Cometic                    .027                               4.165              .058                     9.767                       8.433

Mr Gasket                 .020                               4.420              .051                     9.862                       8.514

Thank you for the help
Carl

54
Member Projects / Re: 390 Build for '68 Mustang 'vert
« on: December 15, 2015, 10:28:28 PM »
How did that cam work for you this summer?

55
FE Technical Forum / Re: Help with Piston & Head Gasket selection
« on: June 24, 2015, 08:41:23 PM »
Thank you for your reply Jay. I will order the ford 6051 head gaskets and put it together,

56
FE Technical Forum / Re: Help with Piston & Head Gasket selection
« on: June 24, 2015, 03:19:24 PM »
I had based tge previous number from a ford 6051 gasket, should i go with a thinner gasket, i see they have some .020 gaskets at summit

57
FE Technical Forum / Re: Help with Piston & Head Gasket selection
« on: June 24, 2015, 02:15:10 PM »
Jay or anyone else, I run the numbers again on the pistons with the actual cc number for the piston dome. I have the 304p's all ready but I called and I can return them, plus they were only $100 for the set, o which set should I stick with?
all the following with .040 gasket and the cam I have
H304p dish is 12.8 cc                Compression Distance 1.759                         Static CR   9.410 to 1   and     Dynamic CR   8.131 to 1 
JB 1116 dish 9.5 cc                   Compression Distance 1.760                         Static CR   9.723 to 1   and     Dynamic CR   8.396 to 1
H395p flattop 4 reliefs is 6 cc     Compression distance 1.759                         Static CR   10.039 to 1  and    Dynamic CR   8.664 to 1
JB 1131 flattop 4 reliefs is 8 cc   Compression Distance 1.760                         Static CR    9.8.65 to 1  and    Dynamic CR   8.516 to 1

58
FE Technical Forum / Re: Help with Piston & Head Gasket selection
« on: June 23, 2015, 07:22:28 PM »
I hear ya Machone, gearset is another $580 to change it over to wide ratio. I really like driving the close ratio, once you get moving, but it would make more sense to change it over to a wide. I just have to spend another $580 i don't have. Lol.
Unless i win the lottery and put a 4.11 with a gearvenders behind it.

59
FE Technical Forum / Re: Help with Piston & Head Gasket selection
« on: June 23, 2015, 02:41:24 PM »
So I have been playing with the online calculators at   https://www.uempistons.com   and it looks like I am right at 8.0 dynamic compression ratio with the cam I have if I did it right. It said use the intake closing at .050 and add 15 degrees. My cam is 38 degrees intake closing so I put in 53 degrees.
But with the deck height of .031 and gasket of .051, the quench is at .082, do I need to get the quench lower which will raise my compression to do this.?
 Will it run on 87 octane with the H304p dish pistons at 8.0 dynamic CR. I was ok to buy 91, but the more money and time this is taking and gas creeping up on price again. I think I just want it to sound good, exhaust and cam, and drive it.

60
FE Technical Forum / Re: Help with Piston & Head Gasket selection
« on: June 23, 2015, 01:17:13 PM »
Been over a month, been working on body, grandkids ballgames, honeydos, and what have you. Had block decked to just square it up. installed one piston and it came out to .031 deck clearance. That is the H304p dish with 12cc I mocked up that has the 1.759 compression height. Looks like the H395P flattop with 4 valve reliefs, which I am guessing at 4 cc, would be at 9.98 to 1 and the dish at 9.26 to 1
Any suggestions now.

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