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rockers cam combo



You would have to do the math and figure out what the lift ends up being on the cam + rockers and make sure your valve guides can allow it.
 
I am a little disappointed with the yt 1.9 and 105 spring upgrade i feel like i lost a lot of low end torque and shifted a little up top i does feel like a more constant and longer powerband but i was looking for more i didn't want to take them out but my lifters are a little noise and need replacement while i am in there i was going to do single roller master chain and tensioner thats why i was looking for a cam that is slightly more aggressive than stock with a little more lift and duration
 
Would that be to run a stage 1 / vs cam or if i were to go threw comp with a custom cam with equal lift on 1.9 rockers
 


Shocked that you weren't happy with the 1.9's.....always a great simple upgrade IMO.

Like Josh said...there isn't a cam out there on the market that you can run 1.9's with. Running a combination of both is extremely costly. Sell the 1.9's and use funds to buy a bigger cam.
 
Thanks for your opinion guys i think ill do the chain lifters and intercooler i have a ported gen 3 and lim with headers 3.4 pulley and all the proper mods to go with it but still about 7 degrees of kr that has gone down some with tuning i dont want to take out timing to do so whats my best next mod to reduce it
 


fbm said:
Has anyone done a custom cam and 1.9 combo
Click to expand...

May I ask why you are asking?

Plans for engine, lift desired? Have you considered all the angles in wanting the high ratio rockers? Do you plan modded or roller rockers?
 
There is actually an old Comp Cam grind with .285 lift that will result in .542 with the 1.9's... I just asked the same question of some folks here that have been there & done that. But as mentioned, without head work there is little benefit (flow) and problematic (clearance) to go this route. It is why I asked your intentions previously.

Go BIG or go home right! Hehehe... : )

But you've gotta have a plan. And big lift should be planned right. Subsequently, after doing some research, I decided against using the 1.9's I have with that cam and will instead be going a different route with 1.7 YT Rolling Rockers...

Big breathing is not just for turbo as some would have it, but I guess I'm just old school, want biggest intake with biggest exhaust, lol.

These are all my opinion of course : )
 
the more overlap you have (nearly unavoidable at huge lifts) the more bleedby and more headaches with closed loop tuning...to the point hwere your stuck open loop with only trial and error tuning and limited automatic adjustment to fueling.

and when your talkin about cams...tons of folks run the st5 cam yet we made more power than 90% of them with a tiny duration little st1r

once you go over 550 lift your just wearing the guides faster unless you open up the heads.

you can only shove so much **** through a low flow toilet
 


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