just curious about something...on my turbo set up i have a pretty built gsr bottom end acl bearings arp rod bolts..etc..and a stock jdm b16 head i plan to put gsr cams in it so i was wondering movin the rev limit to 8500...would i benefit at all...would the head take the abuse etc? any info is appreciated ty...

 

Just got to be careful with the valves floating on your b16 head being that it stock. I dont see you haveing a problem but if you are going to start reving the motor that high you should think of a upgrade. Like retainers, dual valve springs cause I think the intake side of the b16 has dual valve springs and the exhaust doesn't there single. If you are thinking of putting you gsr cams there almost the same as the b16 if you want to upgrade why dont you go with itr or ctr cams.

 

thought gsr cams were best for turbo out of the oem cams?..can any one else put some info..and i do plan to do more to the head just takes time and money...which time i have a lot of but money i dont hehe...thanks for the input

 

Yeah the gsr cams will work good for the time being until you get ready to build the head up. But what I have seen there isn't a really big diference in the cams. But yeah the gsr cams are good but you should consider getting a cam with a good amount of lift on them so you could be able to rev the motor high. But basically it is all in your setup and how big the turbo you are running as well.

 

if you can get a set,ctr cams are the best oem cams.but gsrs should work fine for the time being.I wouldn't rev it much past 8500 cause you will start encountering problems.make sure you retard the timing also when you put them in.

 

no offense to any one..but any more info..any proof or someone that has done this..i need to know if its beneficial..im sure the head could take it..but i need a reason to do so..not just for the hell of raising it..

 

the head could probably take it for a bit, but its not a matter of the head, its the springs that return the valves closed, if its going too fast, the stock springs aren't strong enough to return it back quink enough, and thats called valve float, and when that happens, you risk piston to valve contact, not too good on the piston or the valves

and a set of double valve springs is cheaper then replacing pistions and valves and valvesprings, cam profile has nothing to do with how high you can rev it, it'll affect performance at that RPM, but not that it can go that high, and just search piston to valve contact to see how much it sucks

 

The power you will gain is minimal compared to the abuse you will put that stock head thru- make sure you have taken advantage of all the safe ways to gain power first- remember built block does not = built head- I have a type R head and I never rev past 8400 rpm and I bought it new from acura so I knew it was in great condition- IMO it just not worth the risk for a few hp my car made 330 whp at 10.5 pounds of boost reving to 8200 it is daily driven for two years now- this year I am doing a full build and uping boost

good luck w/ any choices you decide

 

ill keep it at 8200 then..thanks for the input guys..

 

on the dyno, the amt of hp gained on my boys gsr turbo setup from 8210 to 8600 was a whopping 11 hp @ 10 lbs.(these numbers will vary with the exhaust housing size also and boost pressure) theres some actual info for ya bro. hope that helps.