Aight ppl i hav a quick question. Im currently runnin gsr cams in my lsv turbo. I hav a jdm b16 head wit dual springs on the intake side only. I hav the oppurtunity to upgrade to ctr cams but heres my predicament. Must i run dual valve springs on the exhaust side if i plan to keep my rev limit at 8k for now?? Or will i still run into issues due to lack of seat pressure?? I really dnt wanna take the head off jus for the exhaust springs, but im gettin these cams for a steal nd dnt wanna pass it up. Lemme kno ur thots

 

Anybody??

 

they will work fine....i take my gsr to 9000 grand all day on a stock head...bunch of my friends run them also on stock heads with no issues...

 

No valve float?

 

Ya id b worried bout valve float at 9k nd stock valve train wit that kinda lift. My motor goes through the rpms pretty quick. But i should b fine runnin the cams like it sits at 8k right? Ill test that theory in a week or so i guess :/

 

8 should might be fine, getting to 9 and above i would start to worry about valve float. It might not happen right away or never but it could. I had a friend who overeved his type r and it floated a valve right into the piston and trashed the motor. Thats why i have skunk2 dual valve springs all around so i know im good

 

I would get a set of CTR intake springs and move your current dual valvesprings to the exhaust side. The first year of ITRs did have GSR intake springs but they also had dual springs on the exhaust.

Also, you don't need to pull the head to replace the valvesprings. It adds maybe 45 minutes of work to swap them out. Worth it for peace of mind.

 

I have a set of oem gsr valve springs I'll sell you for cheap.

 

lol you don't need to upgrade anything.... look at it like this, ctr cams are almost like a stage 1 cam. like i said almost, so with that being said almost every cam company on the market tells you that for a stage 1 cam it will work fine with stock valve train....so i'm pretty sure ctr's won't hurt anything..

 

Then why does Honda use dual valve springs on both intake/exhaust on just the itr and ctr motors? They don't on the b16 or b18. If it was just fine they would use the bare minimum to make more profit and not spend money on using parts that weren't needed. Idiot kids and their logic these days.

 

That's not even true. Many stage 1 cams will bind on stock valve springs...

 

Ill prolly hold out nd get some supertechs or somethin

 

wow you're stupid

 

so i guess skunk2 does not know anything either....

Key features for the Skunk2 Racing Stage 1 VTEC camshafts
•Compatible with factory valvetrain
•Compatible with aftermarket valvetrain
•Profiles designed to optimize driveability
•Retains stock idle characteristics
•Significant horsepower gains
•Emissions legal

 

that's a comment you should say in person....

 

well if there going to charge you $30.000 for a car there has to be some kind of upgrade to explain the cost of the car.....better motor, 5 lug.

 

By compatible they mean its not necessary. Doesnt mean its not recommended.

 

Your ignorance amuses me. They're not going to upgrade stock valve train just because.

 

They must be, because at their stated lift those cams will bind with ITR valve springs.

 

which is fine but if a company with a stage 1 cam is saying that it's not necessary (bigger cam then a ctr) why would you have to upgrade with a smaller cam??? like i said i have had a ton of motors and so have friends of mine with cam upgrades like this with never any issues. so no reason he should...

here is a perfect example. em1 with a a stock GSR block, stock GSR head, intake, headers,exhaust on ctr cams.... 10000 rpm shifts with no issues...


http://www.youtube.com/user/acuraonboost

 

I can't vouch for what Sk2 says, because if those cams lift to 11.9 like they say they do then aftermarket valvesprings are absolutely necessary.

AFAIK nobody really knows how GS-R valvesprings differ from ITR, but apparently they vary in seat pressure. I imagine they both bind at 11.7 (ITR lifts to 11.5). Since GS-R valvesprings probably don't control as well as ITR, it's risky to rev to 8400. People do it, but it's possible they could be floating slightly and not knowing it.

I can't account for your friend's experiences or what you say about them, but why the F is your friend revving to 10k on CTR cams. He'd be making about 25 hp...

 

lol it was just to show that it could be done, and believe it or not car still seem to be pulling all the way up top.... rsx had no chance of catching up even with his redline almost at 9000....


also this is from Crowers website... i guess there not sure what there doing either...
Engine Make Honda / Acura
Year 1986-2001
Part Class Camshaft
Camshaft Name Stage 1
Camshaft Series Original
Engine Type 4 Cylinder
Engine Size B18A/B & 1st Gen B20A
Valve Lash .006" intake and .008" exhaust
Lobe center 110
Advertised Duration: Intake / Exhaust 245 / 251
Advertised Duration at the Valve: Intake / Exhaust 290 / 296
Duration @ .050" Lift: Intake / Exhaust 193 / 198
Duration @ .050" Lift at the Valve: Intake / Exhaust 203 / 208
Lobe Lift: Intake / Exhaust .238 / .228
Rocker Ratio: Intake / Exhaust 1.75 / 1.75
Gross Valve Lift: Intake / Exhaust .417 / .399
Low RPM Idle
Peak HP 7250
Redline 7750
Performance Description Street use with emphasis on mid range power. Slight lope at idle.
Recommended Kit #1 Stock valvetrain

 

Those aren't VTEC cams and they only lift to 6 mm. My primaries are probably that big. Apples to oranges.

 

Your friend is an idiot. There is a reason they redline at 8200. If he put it on the dyno he would know that reving that high is pointless. And i guarantee that if its stock then that motor will be trashed in a about a month. He is probably experiencing really bad valve float and doesnt even know it. Dont post here if your dont know what you are talking about, new people will get the idea that its fine to run 10 grand on a stock motor.

 

it was to show a point with stage 1 cams for most motors, vtec or not....