My head is in at the machine shop and is awaiting my phone call tomorrow
I somehow lost my exhaust valve spring seats somewhere in my house over the last year
I do have 16 new 2.3 Valve Rotators though
I was thinking since the HO head runs all rotators on intake and exhaust and i am going with HO Springs and retainers with HO Cams with SS Valves
Maybe i should just run all rotators so the springs will have enough tension on them and the height will be right on
Engine will be a boost engine next summer
I really don't wanna source out new seats if i dont have to
Any problems or suggestions with all rotators?
hmmm...
listening.
I'm tired of wasting my time... now I'm breakin' free.
I just don't see it being a big deal running rotators on intake and the exhaust because thats how the HO Head works
I will be using all HO Components now and the HO springs are a little shorter than a LD9 spring so im guessing that is made up by the extra height of the Rotator over the seat?
Really looking for answers by morning as i have to call them and let them know what to do or start tearing my house apart to find those damn seats
Thanks
rotators wont work on the intake side. I tried it once they ran into bind. Don't waist your time.
Rotators are stock on the Intake side for the LD9 heads by GM
What springs and other parts were you using?
Edited 1 time(s). Last edited Monday, May 04, 2009 10:29 PM
the rotators are stock on the exhuast. The intake side of the head has more material that the springs set on then the exhaust side you can see if you compare them. when I did it I did it by mistake. I lieterally could not turn the engine over with a torque wrench. I ended up waisting a lot of time. If you want higher spring rate I sugest you go with a different spring.
however maybe your ld9 head was made different then mine. I have two heads I never touched the other after I removed it from the engine. It has the rotators on the exhaust side as well.
the rotators are on the exhaust to spin your valves so they dont get hotspots and burn up. The intake rarely has these problems of getting that hot. So that is why they dont use rotators on the intake on the ld9.
Well when i and others took our heads apart they had rotators on the intake side
Don't know why yours would be different
Any feelings on rotators on the exhaust? Anyone?
sorry your right their on the intake. I had to look look at the head I have sitting here. but like i said before, when I put them on the wrong side there was too much spring bind and I couldnt turn the engine. but if you think it will work then try it.
ok everything else I said on the above but the other way..
What were you running for Springs, Retainers etc.....?
I am running a Stiffer spring because of the cams im going with
If you were using stock 2.4 springs they would bind because they are taller than the HO springs
Edited 1 time(s). Last edited Tuesday, May 05, 2009 10:05 PM
i am using the manta part springs. The bind is .980 install height on intake is 1.50 exhaust is 1.35 seat preasure is 70 I had them measured at the shop that milled the head just recently .Stock retainers and locks. SI valves vraom car customs. Si valves are 1mm over but have same specs as oem otherwise. When I spoke to Brian from crower he tole me with these springs I could do .420 max lift but may need lash caps. Getting a regrind from colt to .415 @ 50 deg 219 dur Geoffe said I'll need lash caps somewhere between .035 and .085 but he'll let me know for sure when he's finnished.
If I change my springs I might go with these. There not too extreme and are a bit better then what I have.
Eibach 25409-116Brand:
Product Line: Eibach EVS Pro Valve Springs
Part Type: Valve Springs
Part Number: EIB-25409-116
Number of Springs Per Valve: Single
Outside Diameter of Outer Spring (in): 1.040 in.
Coil Bind Height (in): 0.950 in.
Damper Spring Included: No
Inside Diameter of Inner Spring (in): 0.740 in.
Valve Spring Style: Conical
Coated: No
Quantity: Sold as a set of 16.
Installed Height (in) 1.570 in.
Seat Pressure at Installed Height (lbs) 84 lbs.
950 in. Coil Bind
Yea the rotators will only go on one side and seat correctly. The other side there is too much material for them to sit(cant remember which side is which) I was at my machine shop while we were trying to figure out which side was which lol
~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ
After just speaking with the machine shop they only used rotators as stock and seats they must have had on exhaust
Will see it soon
Anyone have the install guide for the ARP headstuds? Torque specs and such?
The intake side has the big oval B opening and has the bigger valve holes. I believe the arp studs are 65lbs with arp lube and 70-75 with out it. I could be wrong.
Am getting cams back in about a week
intake will be .415 @ 215
exhaust .390 @ 206
below is what Geoff recomends
Your Int cam only needs lash caps. It took approximately .065” to do the conversion.
.035” and .060” are common sizes either would do.
Just make sure you check all clearances.
Thanks,
Geoff
I'll be getting these caps
http://www.zxtuner.com/product.sc?productId=81
^^^^ what cams did you use to grind from?
and SWEET im glad someone finally got in on that. i still need to send him my stuff... did you send him stock valves/springs etc??
I'm tired of wasting my time... now I'm breakin' free.
I sent him the secret cams. I swear he said he could go further lift and duration then what I asked for but I dont remember exactly what he said I might have to dig through my emails and look.
he sent that same info to me a few months ago.. its floating around in a post here somewhere...
I'm tired of wasting my time... now I'm breakin' free.
