641" C-head, 1170 hp
+15
Curt
dfree383
bbf-falcon
brianhaeckel
racnrick
56Tbird
bruno
KY JELLY
richter69
342g
D. Sea
jsracing
IDT-572
'65 T-BOLT
David Willingham
19 posters
Page 3 of 3
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Re: 641" C-head, 1170 hp
Bitchen T/Q numbers too! keep us posted
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cool40- BBF CONTRIBUTOR
- Posts : 7308
Join date : 2009-08-31
Age : 53
Location : on the 1/8 mile dyno
Re: 641" C-head, 1170 hp
[size=18]C[/size]
[size=18]L[/size]
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Curt- Posts : 2790
Join date : 2009-02-08
Age : 62
Location : Henrietta, Texas but mostly on the road
Re: 641" C-head, 1170 hp
He is going to try 32 degrees today.
IDT-572- BBF CONTRIBUTOR
- Posts : 4628
Join date : 2008-12-02
Age : 63
Location : Shelbyville Tn.
Re: 641" C-head, 1170 hp
Lem, the tuning guru's didn't want to do timing yet. The fuel curve is still fat up top and all over really. Today we are going to baseline the engine and then give it two degrees. After we get the timing maxed out, we'll get back the fuel. Then we have lash, cam, and vacuum. When we get it maxed, we will put the C16 in and change the a/f ratio to 12.8 or so and start tuning up the gas.
David Willingham- BBF CONTRIBUTOR
- Posts : 495
Join date : 2008-12-02
Age : 52
Location : Blountsville, AL
Re: 641" C-head, 1170 hp
any egt data?
richter69- Posts : 13649
Join date : 2008-12-02
Age : 53
Location : In the winners circle
Re: 641" C-head, 1170 hp
~975-1010 best I can remember.
David Willingham- BBF CONTRIBUTOR
- Posts : 495
Join date : 2008-12-02
Age : 52
Location : Blountsville, AL
Re: 641" C-head, 1170 hp
Tonight was aggravating. Had a fuel line mess up, O2 sensor quit working, an oil leak, another MFI bug, but we found out why we had no vacuum. We had a severe leak at 4 bolt holes we couldn't use on the holmes manifold. We plugged them and the vacuum came around, We had 7" at idle, but only 1.7" at WOT. Power was up to 1160 with no changes other than the little bit of vacuum. we tried 32* and 34* and it lost down to 1151. Tomorrow we are starting at 30 again and trying 28. Then we are going to do more leaning and throw on the vacuum pump. They want the engine off the dyno tomorrow, so I don't know if gas is going to be tried. We can test it at the track, though.
David Willingham- BBF CONTRIBUTOR
- Posts : 495
Join date : 2008-12-02
Age : 52
Location : Blountsville, AL
Re: 641" C-head, 1170 hp
your luck sounds like mine but i would'nt have made that kinda power.lol.good luck
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cool40- BBF CONTRIBUTOR
- Posts : 7308
Join date : 2009-08-31
Age : 53
Location : on the 1/8 mile dyno
Re: 641" C-head, 1170 hp
Up date...............
990 tq from 5500 - 5900 1170 hp @6600 Now on to gas
990 tq from 5500 - 5900 1170 hp @6600 Now on to gas
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IDT-572- BBF CONTRIBUTOR
- Posts : 4628
Join date : 2008-12-02
Age : 63
Location : Shelbyville Tn.
Re: 641" C-head, 1170 hp
very impressive almost a 1000 of them ft lbs
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KY JELLY- Posts : 1530
Join date : 2008-12-03
cool40- BBF CONTRIBUTOR
- Posts : 7308
Join date : 2009-08-31
Age : 53
Location : on the 1/8 mile dyno
Re: 641" C-head, 1170 hp
F'n A !!!
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dfree383- BBF CONTRIBUTOR
- Posts : 14832
Join date : 2009-07-09
Location : Home Wif Da Wife.....
Re: 641" C-head, 1170 hp
Gas deal couldn't be tuned properly in the three pulls we had time for, so we cannot take anything from that other than:
Alky made 17.8" of crankcase vacuum; Gas made 21" vacuum. Little more stuff getting by the rings.
It looks like the alky was taking up some air flow based off where the air correction table numbers were headed in the MFI box. That would agree with
the down nozzle deal.
Overall very happy with the engine. It ran well, made good power and didn't go home in a box full of pieces.
Alky made 17.8" of crankcase vacuum; Gas made 21" vacuum. Little more stuff getting by the rings.
It looks like the alky was taking up some air flow based off where the air correction table numbers were headed in the MFI box. That would agree with
the down nozzle deal.
Overall very happy with the engine. It ran well, made good power and didn't go home in a box full of pieces.
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David Willingham- BBF CONTRIBUTOR
- Posts : 495
Join date : 2008-12-02
Age : 52
Location : Blountsville, AL
Re: 641" C-head, 1170 hp
very impressive David , now get her in the truck
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» Biggest intake seat insert a Dove head will accept, trying to save head from dropped valve.
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» coolant leak between head and block at head bolt location.
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