We are currently running on the new domain and server: www.Speed-Talk.com

IMPORTANT: Update your bookmarks to https://www.speed-talk.com/forum/
(Right-click the URL and select "Bookmark this link")

Search found 108 matches

by moparian
Mon Dec 23, 2019 7:07 am
Forum: Engine Tech
Topic: HEAD GAMES
Replies: 25
Views: 2209

Re: HEAD GAMES

ou812 there not a indy head just old set w7 s, Not sure on the top seat angle,knightengines the seats might be a job for you after xmas. Here is a pic of the head Those chambers look good for 50 deg seats, will work nice. Are you in Australia? I can do it in January no probs, back in the shop after...
by moparian
Sat Dec 21, 2019 9:59 am
Forum: Engine Tech
Topic: HEAD GAMES
Replies: 25
Views: 2209

Re: HEAD GAMES

ou812 there not a indy head just old set w7 s, Not sure on the top seat angle,knightengines the seats might be a job for you after xmas. Here is a pic of the head
by moparian
Thu Dec 19, 2019 8:47 pm
Forum: Engine Tech
Topic: HEAD GAMES
Replies: 25
Views: 2209

Re: HEAD GAMES

I'd leave the cam & valve size. Switch to 50 deg seats & rework the ports a little to suit. 50 deg seats will make the motor 'see' less seat to seat duration while bumping up available flow time/area. Sounds good what would i pick up in cfm? should i try and lift more?If the seat see's less duratio...
by moparian
Thu Dec 19, 2019 8:41 pm
Forum: Engine Tech
Topic: HEAD GAMES
Replies: 25
Views: 2209

Re: HEAD GAMES

How much valve area do you need at TDC and how much valve can you stuff in a 4.100 bore? I'd try to make my existing valve as efficient as possible at mid/high lifts at the expense of low lift. I could definitely be wrong here. I bet you're pushing .300 lift with the piston parked at TDC. I'd be cu...
by moparian
Thu Dec 19, 2019 2:18 am
Forum: Engine Tech
Topic: HEAD GAMES
Replies: 25
Views: 2209

Re: HEAD GAMES

I was thinking of doing some upgrades on my heads,ATM the combo makes 750 hp at 7700 rpm with 750 net lift with 355 cfm on a 45 degree seat 2.100 valve and 365@900 lift,bore size is 4.100 x 4 inch stroke 422 ci 12.6 comp 190 cranking comp 278/284@050 on a 109 l/c now there are 3 things i was thinki...
by moparian
Wed Dec 18, 2019 3:59 pm
Forum: Engine Tech
Topic: HEAD GAMES
Replies: 25
Views: 2209

Re: HEAD GAMES

I think a net valve lift of .357/D with the overlap area a 278/284, 109 cam provides is a prime candidate for a steeper seat configuration. I *think* I'd try that, assuming you have someone in mind who can do it well (more than just three new cuts on the seats), before pulling duration out or widen...
by moparian
Wed Dec 18, 2019 3:50 pm
Forum: Engine Tech
Topic: HEAD GAMES
Replies: 25
Views: 2209

Re: HEAD GAMES

Minimal CCA is 2.88 i think that is just behind the seat area,i am not sure on vacuum at peak power total timing 33. Here is the old dyno sheet
by moparian
Tue Dec 17, 2019 10:29 pm
Forum: Engine Tech
Topic: HEAD GAMES
Replies: 25
Views: 2209

HEAD GAMES

I was thinking of doing some upgrades on my heads,ATM the combo makes 750 hp at 7700 rpm with 750 net lift with 355 cfm on a 45 degree seat 2.100 valve and 365@900 lift,bore size is 4.100 x 4 inch stroke 422 ci 12.6 comp 190 cranking comp 278/284@050 on a 109 l/c now there are 3 things i was thinkin...
by moparian
Mon Dec 02, 2019 5:46 am
Forum: Engine Tech
Topic: Weld or putty
Replies: 12
Views: 902

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: 902

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: 902

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: 589

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: 589

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: 589

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: 589

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.