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Any issue with 2.14/1.81 valves on a 4.280 bore? #543208 12/02/09 06:31 PM 12/02/09 06:31 PM
Joined: Nov 2006 Posts: 2,255 IL furious70 OP top fuel
furious70 OP top fuel Joined: Nov 2006 Posts: 2,255 IL	Seems like I've read threads about 2.14/1.81's on a 383 being a problem? Is it 'only' a problem of valve shrouding, or are there actual interference concerns at certain lifts? 70 Sport Fury 68 Charger 69 Coronet 72 RR

Re: Any issue with 2.14/1.81 valves on a 4.280 bore? [Re: furious70] #543209 12/02/09 06:45 PM 12/02/09 06:45 PM
Joined: Mar 2008 Posts: 63 central Ohio S SnakeEisz67 member
SnakeEisz67 member S Joined: Mar 2008 Posts: 63 central Ohio	I did this in the past with no interference issues. Maybe was due to fact cam wasn't too big? I was running MP Purple cam 533/320 hydraulic cam at the time.

Re: Any issue with 2.14/1.81 valves on a 4.280 bore? [Re: furious70] #543210 12/02/09 06:51 PM 12/02/09 06:51 PM
Joined: Aug 2003 Posts: 8,716 Baltimore/Denver 64Post master
64Post master Joined: Aug 2003 Posts: 8,716 Baltimore/Denver	Quote: Seems like I've read threads about 2.14/1.81's on a 383 being a problem? Is it 'only' a problem of valve shrouding, or are there actual interference concerns at certain lifts? I'm running that combo with no apparent issues...

Re: Any issue with 2.14/1.81 valves on a 4.280 bore? [Re: 64Post] #543211 12/02/09 07:06 PM 12/02/09 07:06 PM
Joined: Nov 2006 Posts: 2,255 IL furious70 OP top fuel
furious70 OP top fuel Joined: Nov 2006 Posts: 2,255 IL	maybe I'm remembering a thread about possible shrouding and loss of power then vs. a mechanical interference issue.... 70 Sport Fury 68 Charger 69 Coronet 72 RR

Re: Any issue with 2.14/1.81 valves on a 4.280 bore? [Re: furious70] #543212 12/02/09 08:01 PM 12/02/09 08:01 PM
Joined: Nov 2006 Posts: 1,458 oklahoma F forphorty pro stock
forphorty pro stock F Joined: Nov 2006 Posts: 1,458 oklahoma	Quote: maybe I'm remembering a thread about possible shrouding and loss of power then vs. a mechanical interference issue.... Get out your die grinder, just make sure you stay above the ring travel.

Re: Any issue with 2.14/1.81 valves on a 4.280 bore? [Re: furious70] #543213 12/02/09 08:40 PM 12/02/09 08:40 PM
Joined: Jan 2003 Posts: 6,531 Jacksonville, FL Chris2581 master
Chris2581 master Joined: Jan 2003 Posts: 6,531 Jacksonville, FL	The olde MP and DC race manuals always said that combo wouldn't work.I ran 452's with the large valves on a 383 and it did fine. Nautilus Racing- We use Superformance gaskets and Turbo Action converters/products.

Re: Any issue with 2.14/1.81 valves on a 4.280 bore? [Re: Chris2581] #543214 12/02/09 08:46 PM 12/02/09 08:46 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	I think they meant the 1.88 exhaust valve. We had eddies (2.14/1/81) on my buddies 413 bored to 4.250 and it ran 11.8's so Fine you bet!!

Re: Any issue with 2.14/1.81 valves on a 4.280 bore? [Re: Dodgem] #543215 12/02/09 08:49 PM 12/02/09 08:49 PM
Joined: Dec 2008 Posts: 1,200 UK 6 602heavy pro stock
602heavy pro stock 6 Joined: Dec 2008 Posts: 1,200 UK	Not had a problem , had @ least 3" lift without any bore interference. Last edited by 602heavy; 12/02/09 08:50 PM.

Re: Any issue with 2.14/1.81 valves on a 4.280 bore? [Re: 602heavy] #543216 12/02/09 10:09 PM 12/02/09 10:09 PM
Joined: Nov 2006 Posts: 2,255 IL furious70 OP top fuel
furious70 OP top fuel Joined: Nov 2006 Posts: 2,255 IL	great, thanks guys 70 Sport Fury 68 Charger 69 Coronet 72 RR

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