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67rustavenger
Samba Member
Joined: February 24, 2015
Posts: 10851
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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BajaDirtMx
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Joined: May 02, 2018
Posts: 10
Location: California
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Junkyardjockey
Samba Member
Joined: April 15, 2013
Posts: 915
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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[email protected]
Samba Member
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
Posts: 915
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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Brian_e 
Samba Member
Joined: July 28, 2009
Posts: 3902
Location: Rapid City, South Dakota
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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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[email protected]
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Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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MURZI
Samba Member
Joined: August 25, 2005
Posts: 5066
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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Junkyardjockey
Samba Member
Joined: April 15, 2013
Posts: 915
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
Samba Member
Joined: August 25, 2005
Posts: 5066
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
Samba Member
Joined: April 15, 2013
Posts: 915
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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mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23950
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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57baja
Samba Member
Joined: April 15, 2008
Posts: 1166
Location: Kaddie Shack Temple City
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| Posted: Wed Nov 20, 2013 2:18 pm Post subject: |
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Yes. They are using the same casting from the same foundry, from what I've been told. AA Performance Products has them, too. Who knows who else will be using them in the future, as the people who made them were at SEMA this year showing them. It looks like EMPI has ground off the "049" symbol, whereas the AA version still has remnants of the ring in the casting.
On the one hand, it's a shame for Revmaster if they developed a product and the people who manufacture it for them are now selling it to other distributors. On the other hand, it does make the product available to more consumers through the various dealer networks out there, which will likely drive the price down for the end user.
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saw2
Samba Member
Joined: November 06, 2008
Posts: 321
Location: nw Oregon
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| Posted: Wed Nov 20, 2013 9:42 am Post subject: |
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| Any other experiences or input from anyone on running the Revmaster 049 heads? |
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mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23950
Location: SHALIMAR ,FLORIDA
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| Posted: Fri Oct 11, 2013 7:58 am Post subject: |
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| it's a shame they didnt "D" port the exhaust,add more material under the ex seat&heart the chambers& cast to where little to no porting work is needed. it can be done. |
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AlteWagen
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Joined: February 23, 2007
Posts: 8692
Location: PNW
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AlteWagen
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Joined: February 23, 2007
Posts: 8692
Location: PNW
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scorpion2
Samba Member
Joined: April 24, 2008
Posts: 17
Location: los angeles
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| Posted: Sun Aug 18, 2013 9:42 pm Post subject: |
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| Hey thanks everyone for ordering heads and keeping me busy. I havent had time to get on here. When the term blended ports is used it basically means the area under the seats is clean up. I do this to all the heads that are ordered complete and on the bare heads I leave that area alone. Thanks |
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ralf
Samba Member
Joined: July 08, 2008
Posts: 1215
Location: r4
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| Posted: Fri Aug 02, 2013 3:35 am Post subject: |
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scorpion2
i hear ya on the china parts..
even if alot here always say "china = crap"
its cuz the seller or whoever contracted a chinese plant is trying to save a dolla LOL usually theyre on that side of the ocean too LOL
and they blame china LOL
we recently sent a cpu that no longer is available..
and they did one.. if not better (including wat we requested)
except we had to get 250pc for the first order LOL
if these fail ...its not like ud be stock on the side of the road..
you either crash or give up the ghost LOL
they havnt failed...
on topic- i like the heads! would love to try these on some projects
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fivelugshortaxle
Samba Member
Joined: May 13, 2011
Posts: 4263
Location: Aumsville, Oregon
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| Posted: Fri Aug 02, 2013 12:07 am Post subject: |
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Waiting on my Mofoco 050's. 42 x 37.5
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2332 with lots of goodies....
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4340 84mm crank
AA 94mm p&c' s
Total seal 2nd ring, rest are Grants
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Magnum straight cuts
Steve Long XR310 on a 106
CB 1.4 rockers
CB Magnaspark 2 distributor
NGK D7ea plugs
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Dellorto 48's with 40 venturies
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