Merlin Ovals vs. 049's - The 1947 - Present Chevrolet & GMC Truck Message Board Network

custom72c20 · 01-29-2009, 12:36 AM

Is anyone running the merlin oval ports? I was wondering if I should purchase a used set of bare merlins for $300 and putting new valves and springs in them rather than doing work to my 049's. Anyone got any flow numbers that I can compare? Opinions wanted. Thanks in advance.

custom72c20 · 01-30-2009, 12:02 AM

Anyone?

PhilaTruck · 01-30-2009, 10:55 PM

Yo, here are some numbers:

Click the download

It's got the 049 numbers. Call World to get the Merlin's.

custom72c20 · 01-31-2009, 03:04 PM

Thank you for the cart. That is the most complete list of flow numbers i have ever seen. Awesome!!

PhilaTruck · 01-31-2009, 04:44 PM

That was the first time I saw that list. Used to get them from Purple Sage Trading post.

The folks at World are pretty decent. I purchased my heads used, and they were more than happy to help. Good luck-

-Todd

jakeshoe · 02-01-2009, 04:12 AM

I had bowl ported 049s on the 427 in my Chevelle, went to Merlin ovals and gained nothing at the strip, fresh motor, almost the same cam, went form OLD Performer intake to Performer RPM Q-Jet and car ran the same ET.

I would still pay $300 for good Merlin cores though... A more radical combo would see the gains. Mine is a mid 12 second car.

custom72c20 · 02-01-2009, 07:17 PM

The heads I am looking at had broke the valves so in 1 cylinder on one head and 2 cylinders on the other, there are divits in the combustion chamber. He said he took them to a machine shop and had them pressure tested and the guides fixed in the 3 cylinders. Do you still think they would be worth it?

DMARCUM123 · 02-04-2009, 01:23 AM

merlin heads are a little heavier if it was me i would use the 049 or the 781 heads suppose to be the best gm flow oval heads

01-29-2009, 12:36 AM	#1
custom72c20 Registered User Join Date: Oct 2006 Location: Temecula,CA Posts: 309	Merlin Ovals vs. 049's Is anyone running the merlin oval ports? I was wondering if I should purchase a used set of bare merlins for $300 and putting new valves and springs in them rather than doing work to my 049's. Anyone got any flow numbers that I can compare? Opinions wanted. Thanks in advance. __________________ Nick Old pic of my 72: http://img340.imageshack.us/my.php?image=img0435co5.jpg 04 Silverado Daily Driver 68 GMC short step http://67-72chevytrucks.com/vboard/s...d.php?t=379665 "I'll beat you to the gas station!!"

01-30-2009, 12:02 AM	#2
custom72c20 Registered User Join Date: Oct 2006 Location: Temecula,CA Posts: 309	Re: Merlin Ovals vs. 049's Anyone? __________________ Nick Old pic of my 72: http://img340.imageshack.us/my.php?image=img0435co5.jpg 04 Silverado Daily Driver 68 GMC short step http://67-72chevytrucks.com/vboard/s...d.php?t=379665 "I'll beat you to the gas station!!"

01-30-2009, 10:55 PM	#3
PhilaTruck Right on the line, baby! Join Date: Oct 2003 Location: Phila, PA 19130 Posts: 1,486	Re: Merlin Ovals vs. 049's Yo, here are some numbers: Click the download It's got the 049 numbers. Call World to get the Merlin's. __________________ 83 GMC 406 th400/3.73 Eaton Truetrac posi, headers, x pipe, & racePros. Tubular control arms, lowering rear springs, caltracs. Still ugly, but getting built right, although slowly Click and scroll down for site vendors! Subscribe here! Last edited by PhilaTruck; 01-30-2009 at 10:55 PM.

01-31-2009, 03:04 PM	#4
custom72c20 Registered User Join Date: Oct 2006 Location: Temecula,CA Posts: 309	Re: Merlin Ovals vs. 049's Thank you for the cart. That is the most complete list of flow numbers i have ever seen. Awesome!! __________________ Nick Old pic of my 72: http://img340.imageshack.us/my.php?image=img0435co5.jpg 04 Silverado Daily Driver 68 GMC short step http://67-72chevytrucks.com/vboard/s...d.php?t=379665 "I'll beat you to the gas station!!"

01-31-2009, 04:44 PM	#5
PhilaTruck Right on the line, baby! Join Date: Oct 2003 Location: Phila, PA 19130 Posts: 1,486	Re: Merlin Ovals vs. 049's That was the first time I saw that list. Used to get them from Purple Sage Trading post. The folks at World are pretty decent. I purchased my heads used, and they were more than happy to help. Good luck- -Todd __________________ 83 GMC 406 th400/3.73 Eaton Truetrac posi, headers, x pipe, & racePros. Tubular control arms, lowering rear springs, caltracs. Still ugly, but getting built right, although slowly Click and scroll down for site vendors! Subscribe here!

02-01-2009, 04:12 AM	#6
jakeshoe Registered User Join Date: Mar 2006 Location: Texas Posts: 37	Re: Merlin Ovals vs. 049's I had bowl ported 049s on the 427 in my Chevelle, went to Merlin ovals and gained nothing at the strip, fresh motor, almost the same cam, went form OLD Performer intake to Performer RPM Q-Jet and car ran the same ET. I would still pay $300 for good Merlin cores though... A more radical combo would see the gains. Mine is a mid 12 second car.

02-01-2009, 07:17 PM	#7
custom72c20 Registered User Join Date: Oct 2006 Location: Temecula,CA Posts: 309	Re: Merlin Ovals vs. 049's The heads I am looking at had broke the valves so in 1 cylinder on one head and 2 cylinders on the other, there are divits in the combustion chamber. He said he took them to a machine shop and had them pressure tested and the guides fixed in the 3 cylinders. Do you still think they would be worth it? __________________ Nick Old pic of my 72: http://img340.imageshack.us/my.php?image=img0435co5.jpg 04 Silverado Daily Driver 68 GMC short step http://67-72chevytrucks.com/vboard/s...d.php?t=379665 "I'll beat you to the gas station!!"

02-04-2009, 01:23 AM	#8
DMARCUM123 Registered User Join Date: Sep 2006 Location: WAYNE, WV. Posts: 675	Re: Merlin Ovals vs. 049's merlin heads are a little heavier if it was me i would use the 049 or the 781 heads suppose to be the best gm flow oval heads



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