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mark tucker
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Joined: April 08, 2009
Posts: 23937
Location: SHALIMAR ,FLORIDA
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 Posted: Wed Nov 20, 2013 3:02 pm Post subject: |
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| how do you see them as the same castings?& I wonder just how much revmasters did as far as "developement", |
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Junkyardjockey
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Joined: April 15, 2013
Posts: 883
Location: Utica,NY
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| Posted: Mon May 25, 2015 12:01 pm Post subject: |
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How would these RM 049 non-ported heads work with a stock 1600DP, flat top pistons, 34pict3 carb & stock heater boxes?? I'm about ready to make the drop on these heads; but I hear there may be issues with using stock heater boxes with larger than stock exh. valves; what's behind that theory?? Should I swap out the hi-rev springs that are in these with stock springs with my stock cam? Thanks!
Ken
Romans 10:9 |
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MURZI
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Joined: August 25, 2005
Posts: 5063
Location: Madisonville, La
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| Posted: Mon May 25, 2015 12:03 pm Post subject: |
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I'd keep stock valve size on a 1600(even with a larger cam) Larger valves make the bottom end soggy. Been there done that.
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62 vert
2276
Tim’s welded heads
45 Dells
A1 sidewinder
Fk44 cam |
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Junkyardjockey
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Joined: April 15, 2013
Posts: 883
Location: Utica,NY
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| Posted: Mon May 25, 2015 12:09 pm Post subject: |
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Mmmmm thanks for the tip Murzi! I def. want 3/4" reach plugs in my new heads; I was considering ACN's L3 heads, but John says the combustion chambers (59cc) are too large in his opinion for a bone stock 1600DP; he suggested having his heads machined to 51cc, what do you think about that? Is there a new head out there now with 3/4" reach plug, small comb. chamber & stock valve size? And thanks again!
Ken
Romans 10:9 |
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MURZI
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Joined: August 25, 2005
Posts: 5063
Location: Madisonville, La
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| Posted: Mon May 25, 2015 12:14 pm Post subject: |
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I agree. Most smaller builds I use 47-49cc flycut heads to bump compression. Depends on the cam. With a stock cam 51cc would be about right assuming a stock .055 deck.
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62 vert
2276
Tim’s welded heads
45 Dells
A1 sidewinder
Fk44 cam |
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[email protected]
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Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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Brian_e
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Joined: July 28, 2009
Posts: 3291
Location: Rapid City, SD
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| Posted: Mon May 25, 2015 12:41 pm Post subject: |
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| Junkyardjockey wrote: |
| Is there a new head out there now with 3/4" reach plug, small comb. chamber & stock valve size? And thanks again! |
I would get these and have them flycut to get your compression right with a .050" deck height. Really good heads for the money. Have them cut for 90.5 when ordering and then run AA thick wall 88mm's that will slip into the stock case.
http://www.aapistons.com/collections/stock-perform...ad-35-5x32 |
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Junkyardjockey
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Joined: April 15, 2013
Posts: 883
Location: Utica,NY
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| Posted: Mon May 25, 2015 1:10 pm Post subject: |
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hello again John! I have almost made up my mind to get your heads; about the only really good heads out there with 3/4" reach plug holes & stock valve sizes. Since I won't be able to measure the deck height just yet , I am trying to get as close to stock specs as possible; maybe bump up the CR a little bit & still keep the stock cam, I don't think I need or want more than 8:1 CR. Question for you John: what kind of time frame we looking at here if I order your L3's & have the chambers cut to a particular cc? I would get those heads in that link above if the plugs were 3/4" reach! Thanks again!
Ken
Romans 10:9 |
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[email protected]
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Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Mon May 25, 2015 2:50 pm Post subject: |
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Head CCing takes 2-3 days.
Do your math with a DH of ~.055". If you are +-.010" it's not a big deal, and won't change the CR enough to be significant. The OE heads are not 3/4" reach plugs, the other ones are though.
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Junkyardjockey
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Joined: April 15, 2013
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Location: Utica,NY
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| Posted: Tue May 26, 2015 8:00 am Post subject: |
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Thanks John for your help! One other concern I have: your heads have single hi-rev springs; are those going to affect the stock cam, lifters, pushrods & rockers in a negative way? Thanks!
Ken
Romans 10:9 |
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BajaDirtMx
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67rustavenger 
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Joined: February 24, 2015
Posts: 9767
Location: Oregon
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| Posted: Tue Aug 14, 2018 5:03 pm Post subject: Re: RevMaster 049 Heads |
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Why are you ignoring the advice of the pro engine builders from your "cam advice" thread?
You had sound advice from at least three of the people I listen to.
I have no idea about rev-master 049 heads.
But I do know that Tim's head work comes well recommended. They start with an AA 043 blank head and complete the package with their own parts.
https://www.performanceworkshop.net/cylinder-heads
Take a look and then decide.
Good Luck.
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Cheap parts are gonna disappoint you.
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GFY's Xevin and VW_Jimbo! |
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