Re: new best for the "land yacht"
[Re: Crizila]
#1365475
01/06/13 10:31 PM
01/06/13 10:31 PM
|
Joined: Jul 2004
Posts: 19,318 State of confusion
Thumperdart
I Live Here
|
I Live Here
Joined: Jul 2004
Posts: 19,318
State of confusion
|
Good and bad story............I assume you squeeze this thing?
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
|
|
|
Re: new best for the "land yacht"
[Re: Crizila]
#1365477
01/06/13 11:18 PM
01/06/13 11:18 PM
|
Joined: Mar 2006
Posts: 9,871 MI, usa
dvw
master
|
master
Joined: Mar 2006
Posts: 9,871
MI, usa
|
Quote:
Ran a 10.50 @ 120.77 at Speedworld on Saturday. Yes, only 120. 1.44 60 foot. Lost 2 plugs in high gear when the ground straps melted off. Damage accessment to follow.
Hopefully you got lucky. My 340 always got a piston or a head gasket. Since I reduced my timing (1991) to 30 total it 's never hurt itself again at12lbs boost. Doug
|
|
|
Re: new best for the "land yacht"
[Re: Crizila]
#1365486
01/07/13 07:17 PM
01/07/13 07:17 PM
|
Joined: Jan 2003
Posts: 19,382 Las Vegas
Al_Alguire
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 19,382
Las Vegas
|
Go to the race plugs first off. Start with a plug on the colder side and go from there. Does not look to bad do as fastmop suggests and get after it.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
|
|
|
Re: new best for the "land yacht"
[Re: Crizila]
#1365487
01/07/13 09:12 PM
01/07/13 09:12 PM
|
Joined: Mar 2006
Posts: 9,871 MI, usa
dvw
master
|
master
Joined: Mar 2006
Posts: 9,871
MI, usa
|
Quote:
Quote:
I'd do a compression check. If its good then go a range colder on the plugs, back the timing back five to seven degrees and depending on A/F fattin it up a couple jets and try again. Once its dialed in for hi boost it's time to play!
Ya,all the above. Just ran a comp test and all appears good (within 2 lbs from previous test on all holes ). Valve train all looks good, including lash. Attached pic of plugs - NGK ZFR5F. Two burned ones were in holes 4 & 5. I'm open for suggestions on plugs? Could go a few steps colder - or maybe something that isn't an extended core? Already 5 sizes bigger on the jets all around - as I received the blower carb from ProSystems ( annular discharge 950 ). I could use some help with plug selection ( 408 blower motor with ported Magnums ).
Ah,Lucky. I think 25lbs might work intercooled. Would need less timing, 22-25? The super rich part I'm not convinced. Just as running a nitrous motor,way rich usually spells trouble. I've found 11.8-12.0 to work well. Mine always hurt #5. Doug
|
|
|
Re: new best for the "land yacht"
[Re: Crizila]
#1365490
01/07/13 11:24 PM
01/07/13 11:24 PM
|
Joined: Nov 2003
Posts: 1,969 Chandler, AZ
Duner
top fuel
|
top fuel
Joined: Nov 2003
Posts: 1,969
Chandler, AZ
|
Glad you didn't hurt it. I was doing some dyno testing, and mine wasn't happy beyond 21° of timing at 18 psi of boost. I'm running 9.5:1 compression.
Oh, and GREAT TIME TOO!!!
Last edited by Duner; 01/07/13 11:24 PM.
|
|
|
Re: new best for the "land yacht"
[Re: Duner]
#1365491
01/07/13 11:37 PM
01/07/13 11:37 PM
|
Joined: Oct 2007
Posts: 3,978 Hilltown Pa
1967dartgt
master
|
master
Joined: Oct 2007
Posts: 3,978
Hilltown Pa
|
Put the biggest nozzle in the meth inj. Run a ngk 5671-9 or 10 and let her rip. 11.8-12.0 is a good afr to shoot for on a blower motor.
Last edited by 1967DartGT; 01/07/13 11:39 PM.
Brett Miller W9 cnc'd heads STR Chassis fabraction
|
|
|
|
|