which cam for these parts ??

[Taylor_sy#2447]

ok ive read a bunch of posts and gotten input from a couple people but i thought id type out everything and get another opinion are 2....

Vortech heads "with some flow work"
PTE-51
50# injectors
2800-3k TC
Ultimate
everything changed to 3" to match my exhaust....
and probably a engine rebuild with SRP pistons and eagle rods (and some other stuff just to strenghthin my engine a bit)

so my question is this.... im gonna get a new cam.... but should i get a 412 or a 422 ???

/rubs hands

/awaits guru input

 

[jwaller]

you should get my new custom cam designed for these trucks and vortec heads. it's more gooder than anything out there right now.

 

[Taylor_sy#2447]

more info on the more gooder ???

 

[ghettosled]

it all depends on the chip. The 50# vortec calibrations for the ultimate chips were done with a 412 cam. This should make the 412 as ideal as possible, however there are many "gooder" profiles available. If you are custom buring a chip or John has a chip for his cam, then i'd say go for it Otherwise it wont do you any good with a better cam if you dont compensate for it.

 

[jwaller]

more info on the more gooder ???

generally speaking it has more lift and duration and more seperation than the 412. everything we need with this trucks and builds. all still having a good idle and more power than the 412.

 

[Taylor_sy#2447]

will i have better performance gains with it than i would with the 412 with the vortech ultimate ??? very interested all info appreciated

 

[Taylor_sy#2447]

ok so far its either a 412 (thanks ghettosled) or johns custom as soon as i get more info on it

also any1 have any idea what ill be running with this set up ??? so far its looking like about 12 flat ???

 

[ed hess]

more lobe separation than a 412?

wonder why harry made my cam with less separation?

just thinking out loud here but maybe is was so that it could go faster (gooder), but hey i dont know anything about cams....

ed

 

[bigtime]

more lobe separation than a 412?

wonder why harry made my cam with less separation?

just thinking out loud here but maybe is was so that it could go faster (gooder), but hey i dont know anything about cams....

ed

Ed, you have to have more than 112lsa. If you didn't you would need a 106mm turbo to make any boost.

 

[ghettosled]

seems like alot of guys go with a bit more overlap even on turbo cams when making big HP.

 

[ed hess]

more lobe separation than a 412?

wonder why harry made my cam with less separation?

just thinking out loud here but maybe is was so that it could go faster (gooder), but hey i dont know anything about cams....

ed

Ed, you have to have more than 112lsa. If you didn't you would need a 106mm turbo to make any boost.

OH NO! No Boost! Damn... this really sucks cuz the turbo is way smaller than a 106mm and the lsa is less than 112... I will have to call harry and tell em this cam didnt work. roflmao

ed

 

[jwaller]

seems like alot of guys go with a bit more overlap even on turbo cams when making big HP.

yup this is exactly what I've seen too. usually 114-115 or 116 depends on the exact build though. 112-110 is NA type stuff like what I used to run with the 430 cam and it took forever to make boost on the line if it ever did.

 

[bigtime]

Ed's cam can get away with less probably because it's a flat tappet??? But he still would be giving away boost.

 

[ghettosled]

the cams we run in the race motors have less then 112 LS also.

 

[ed hess]

the cams we run in the race motors have less then 112 LS also.

yo bob ya see that!

 

[ed hess]

seems like alot of guys go with a bit more overlap even on turbo cams when making big HP.

yup this is exactly what I've seen too. usually 114-115 or 116 depends on the exact build though. 112-110 is NA type stuff like what I used to run with the 430 cam and it took forever to make boost on the line if it ever did.

john

if you go watch the video of me breakin an axle, you see the truck staged.
the guy turns on the camera and you see it final stage. you then hear the rev limiter pop a couple times before it leaves. it left at 16psi and didnt sit there waiting to build boost...

The combination, and the tune make it build quick. I also put heat into the turbo from doing a dry hop and takin my time staging. timing it in the shop it took 2.7 seconds total. this is more than fast enough to be at boost before the last amber lites. in the video the truck left at 16psi.

110 lsa and building boost fast...

ed

 

[jwaller]

yup it's all in the tune, bc I later used that same 430 cam to build lots of boost on the same heads and a PT74 with a customers truck. mine just wouldnt ever do it bc I didnt have the time to mess with the 2 step and everything else needed to get it right(tuning). it was just driven raw to the track.

 

[Sy769]

I wish there was more info out there on turbo cams for SBC and the 4.3.
We've had this discussion before but info is hard to come by. Seems most of it is geared around the import crowd.

I have talked to Comp Cams a few times and they agree that the 412 and similiar leaves some power on the table. the funny thing is that I've gotten some very different recommendations while supplying the same data. It would be nice it they had someone on staff that specialized in turbo grinds.

What would be fun is to have access to a cam grinder and a dyno and just experiment.

 

[jwaller]

I wish there was more info out there on turbo cams for SBC and the 4.3.
I have talked to Comp Cams a few times and they agree that the 412 and similiar leaves some power on the table. the funny thing is that I've gotten some very different recommendations while supplying the same data. It would be nice it they had someone on staff that specialized in turbo grinds.

What would be fun is to have access to a cam grinder and a dyno and just experiment.

the 412 leaves a lot onthe table bc its a N/A cam. not for turbo use. the reason I started using it back in the day is bc it was the only thing that got close enough to start to help these heads. everything else out there wasnt even close. but yrs later it is stil a good option for those that dont want the pain and hassle of chosing a cam for their truck. bc once you go from the 412 it is almost a requirement to have a custom grind for each truck as the needs of each person are different...

you wouldnt put the same cam in a daily driver that you would in a all out drag truck.

this is exactly why I've found it helpful to enlist the support of some single turbo camero builders. these guys do all their own cam and header work and it is invaluable stuff so that we dont have to go through the same work they did. these guys have some 1500-2k hp single turbo cars that are just out of this world.