RHS 225 For a C5 Z06
RHS 225 For a C5 Z06 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 .
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 .
Staging Lane
Joined: Aug 2013
Posts: 73
Likes: 0
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.
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.
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.
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.
do you need spring locators for your heads?thanks!
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.
Last edited by 64post; Feb 8, 2015 at 01:57 PM.
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.
Staging Lane
Joined: Aug 2013
Posts: 73
Likes: 0
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.
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great numbers ,what cam did you use ,and what intake,,i agree ,for the price is the best bang for the buck,thanks
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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.
Staging Lane
Joined: Aug 2013
Posts: 73
Likes: 0
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
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!!
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.
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.
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!
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!