ozzyls12001

iTrader: (2)

hi,i recently bought a good deal of a bere pair of RHS 225 heads on eBay but i read that a lot of people having issues of using doublé spring locators,
My questions are:

1.-what head gasket should i use ?
2.-what valves and part number should i use?
3.-do i need to change my spring locators because i recently bought the BTR dual springs .660 lift
4.-do i need to flycut using a Torquer V2 cam?
5.-are this heads the same as Dart 225´s?

this is the link of the heads

http://www.ebay.com/itm/381147607954?_trksid=p2060778.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Thank you very much for your help ,ill appreciate any help .

CarlostheBarbarian

Im running the same heads with a Comp 232/240 .605 .598 112+4 cam in a c5z.

I didn't have to flycut, used a stock GM MLS head gaskets and I believe the RHS heads are Dart castings. Mine came with SS intake/exhaust valves(Rev IIRC)

If I was freshening them up...Id probably go with turned down LS3 intake valves to drop some weight in the valve train. 2.05 solid stem isn't a lightweight, although mines taken many 6800 rpm bashings pretty well so far.

ozzyls12001

iTrader: (2)

thanks for your answer,i search that a lot of people used the MLS LS2 head gaskets.i already have the Stock LS1-LS6 gaskets ,is there a problem using the stock ones?

do you need spring locators for your heads?thanks!

64post

iTrader: (5)

Ferrea 6234's for the 2.05" intakes, 4.90". Manley 1.60" for the exhaust 4.930" The head gasket will depend on your bore size, I used Cometic 3.970" bore gaskets .040" thick for a 3.905 bore engine, there are many brands and combinations that will work with these heads, I am using the earlier Dart version of that head, I hope RHS improved that head because it wasn't very impressive in stock form (flow #'s) as a Dart product.

64post

iTrader: (5)

They respond well, 14-20cfm improvement at all lifts if you taper the guide bosses and do nothing else, just saying.

ozzyls12001

iTrader: (2)

thank you very much for your help, the heads says its 2.05 ,its ok using a valve 2.055 ?? i hope this heads Work good in my setup i saw that they flow 320 int and 230 ex

CarlostheBarbarian

Wanna say they were ls2 head gaskets. Ill see if i can look back...

My car made 467rwhp/427rwtq one day and 457rwhp/415rwtq the next on a dynojet. Not setting the world on fire but for a budget un-ported set up...i feel like its where it should be.

ozzyls12001

iTrader: (2)

great numbers ,what cam did you use ,and what intake,,i agree ,for the price is the best bang for the buck,thanks

Rise of the Phoenix

iTrader: (27)

Great heads. Plus, you can get them ported down the road once money allows. AI has a program for them, as well as many other head porters.

64post

iTrader: (5)

Ozzy, more like 310 and 220 max. cfm as cast, (no valve job) and that's with a 1/2" radius clay entry on a SuperFlow 600 (LJ's Machine Napa Valley Ca.) You'll get what you're looking for and paid for by just using them as is, I am just letting you know there's more in there to be had and it's nothing complicated, just change the shape of the guide bosses some and lay them down some, very basic.

CarlostheBarbarian

Comp 232/240 .605 .598 XER lobes...and a FAST 92/ls2 TB set up.(unported)

Rips from 3500-6800rpm. RHS 225's werent my first, second or third choice as they arent widely used and not a lot of info out there...but got a smokin deal on the whole HCI set up. Nothing but good things to say so far...good luck w/ the set up

ozzyls12001

iTrader: (2)

yeah,i was thinking about that,but if i send them to AI will bring more CFMS did i will gain more? is no enough 320 CFM for a stock 347 cubes? if i port them is not overkill ?thanks!!

Rise of the Phoenix

iTrader: (27)

Agree, on a 346ci, leave as is, but in the future, if you ever go big cubes, it's nice to know those heads can be made to accommodate a larger setup.

ozzyls12001

iTrader: (2)

thanks phoenix,thank you for the advice,,if I stroke my z06 I will send them inmediatly to ai

ozzyls12001

iTrader: (2)

hi 64post,do you think this valves work with the dart 225?

intake
http://www.ebay.com/itm/Chevy-GM-LS1-FERREA-6000-Stainless-Intake-Valves-2-05-4-900-set-8-/190797445645?pt=Race_Car_Parts&hash=item2c6c69fa0d&vxp=mtr

http://www.ebay.com/itm/MANLEY-RACE-FLO-RACE-MASTER-EXHAUST-VALVES-LS1-LS2-LS6-HEAD-1-600-/290882906288?pt=Race_Car_Parts&hash=item43b9f8e8b0&vxp=mtr
for the exhaust



thanks!

64post

iTrader: (5)

Yes, those are what I am using but you could use other brands as well. Ferrea 6000 series are very good quality.

ozzyls12001

iTrader: (2)

thank you very much,i already ordered the valves

ozzyls12001

iTrader: (2)

i ordered for the exhaust valves this brand,i tried to search ,but didnt find anything about this valves,but at specs it looks great

http://www.ebay.com/itm/Engine-Pro-Black-Nitro-Exh-Valves-LS1-1-600-Head-Diameter-Set-of-8-/231498520815?pt=Motors_Car_Truck_Parts_Accessories&hash=item35e66318ef&vxp=mtr

thanks!