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Search found 100 matches

by moparian
Mon Dec 02, 2019 5:46 am
Forum: Engine Tech
Topic: Weld or putty
Replies: 12
Views: 606

Re: Weld or putty

A lot of different ideas here,i will let you guys know how it turns out next week. cheers
by moparian
Sat Nov 30, 2019 9:46 pm
Forum: Engine Tech
Topic: Weld or putty
Replies: 12
Views: 606

Re: Weld or putty

Thanks guys if i could help it i did not wan't to play with the inserts,i had some heads welder before and the re cracked again so i am a little shy on welding them ,what is the best putty/resin to use ,eg jb weld or epoxy
by moparian
Sat Nov 30, 2019 7:59 am
Forum: Engine Tech
Topic: Weld or putty
Replies: 12
Views: 606

Weld or putty

i have this pin hole in my exhaust port.What would be the best way to repair it i can get to both sides?putty or weld?
by moparian
Sat Oct 05, 2019 3:37 am
Forum: Engine Tech
Topic: Oil drain back
Replies: 7
Views: 450

Re: Oil drain back

MadBill wrote:
Sat Oct 05, 2019 12:14 am
Depends. If you suck from a rocker cover, likely worse. If from the valley, better.
It pulls from the valve cover now but i will do a fitting on the valley plate.Cheers
by moparian
Fri Oct 04, 2019 11:39 pm
Forum: Engine Tech
Topic: Oil drain back
Replies: 7
Views: 450

Re: Oil drain back

Will a vacuum pump make the problem worse or help with getting the oil back down to the sump?
by moparian
Fri Oct 04, 2019 8:52 pm
Forum: Engine Tech
Topic: Oil drain back
Replies: 7
Views: 450

Re: Oil drain back

Thought that may have been the case ,Cheers guys
by moparian
Fri Oct 04, 2019 9:41 am
Forum: Engine Tech
Topic: Oil drain back
Replies: 7
Views: 450

Oil drain back

I am doing a couple of oil drain backs from the heads and i have a remote oil filter with 2 inlets and to outlets can i use one inlet for a return line or will the pressure it back up the line to the head,i only use one inlet and one exit atm or punch a couple holes in the top of the sump.
by moparian
Fri Aug 16, 2019 1:25 am
Forum: Engine Tech
Topic: Exhaust port flow
Replies: 36
Views: 1523

Re: Exhaust port flow

PRH wrote:
Thu Aug 15, 2019 9:20 pm
Indy 440-3X....... it’s the “big” single 4500 intake for use with the bigger cube combo’s.

It’s similarly sized to the B1 manifold.
Thanks
by moparian
Thu Aug 15, 2019 7:39 pm
Forum: Engine Tech
Topic: Exhaust port flow
Replies: 36
Views: 1523

Re: Exhaust port flow

You were def getting some nice TQ numbers out of the alky. Then at the upper rpms all that fuel volume starts using up valuable space in the manifold and ports. 14:1 572, 572-13 heads flowing 385, 440-3x intake, 1150 carb, c12 gas...... 766tq@5600/918hp@6800. These were the “cnc365” version heads.....
by moparian
Thu Aug 15, 2019 6:33 pm
Forum: Engine Tech
Topic: Exhaust port flow
Replies: 36
Views: 1523

Re: Exhaust port flow

I have some data from the B1 heads I did for Koffel on the engine that went to EMC if your interested. It was a huge head on a small engine and struggled. Is that more or less what you would have expected in that type of “racing” format? It was less. It was a 433. I have a dyno sheet, let me find i...
by moparian
Thu Aug 15, 2019 8:32 am
Forum: Engine Tech
Topic: Exhaust port flow
Replies: 36
Views: 1523

Re: Exhaust port flow

Small exhaust ports/ valves make more power than large. The reason [theory]: A secondary combustion chamber is developing in the exhaust port which is creating reversion. (I.e. more exhaust gases going in the exhaust port than going out). This creates a secondary combustion process that makes rever...
by moparian
Thu Aug 15, 2019 8:26 am
Forum: Engine Tech
Topic: Exhaust port flow
Replies: 36
Views: 1523

Re: Exhaust port flow

1.76" 270 cfm. 1.70" 220 cfm. Maybe that is not the correct flow numbers, you double check everything in the flowbench? Before and after. "maybe i should go back to the original size valve?" Maybe you should go first in the dyno and then go back to the original valve size. If it needs to go. I spok...
by moparian
Wed Aug 14, 2019 4:26 pm
Forum: Engine Tech
Topic: Exhaust port flow
Replies: 36
Views: 1523

Re: Exhaust port flow

B1 heads? I haven’t had too many of those through the shop. The ex port exit at the flange is quite large, but the bowl area of those heads are pretty small. I’ve tested a few ported by other shops that had pretty nice ex flow....... others not so much. I realize the ex flow numbers don’t seem to c...
by moparian
Tue Aug 13, 2019 9:58 pm
Forum: Engine Tech
Topic: Exhaust port flow
Replies: 36
Views: 1523

Re: Exhaust port flow

B1 heads? I haven’t had too many of those through the shop. The ex port exit at the flange is quite large, but the bowl area of those heads are pretty small. I’ve tested a few ported by other shops that had pretty nice ex flow....... others not so much. I realize the ex flow numbers don’t seem to c...
by moparian
Tue Aug 13, 2019 10:50 am
Forum: Engine Tech
Topic: Exhaust port flow
Replies: 36
Views: 1523

Re: Exhaust port flow

jarmoyp wrote:
Tue Aug 13, 2019 10:40 am
Mopar bb have a smaller exhaust. Maybe it flows better now with a pipe.
I have not flowed it with pipe it will need 2 1/4 pipes just to cover the hole then maybe stepped up from there