Anyone tried different cams combos - SRT Forums

Matts04SRT · 09-04-2009, 07:57 PM

I was just wondering for those with bigger turbos, have you ever wondered or tried different duration cams, like say crane 12 or 14 on intake for better spool, and like a 16 or 18 on exhaust to better get more flow out of it. I currently have BC S2 and was wondering if their S3 or soon to release S4 cams would work. Maybe increase the power band. Thoughts, ideas. I was just wondering.

julius717 · 09-04-2009, 11:30 PM

if you got big turbo id ditch the BC2's in general. i had those with my big turbo horrible cams more for small turbo lower powerband. my .02

but i dont see anything wrong with what you are saying. Definitly is logical

matthew00029 · 09-05-2009, 04:40 AM

For spool wouldn't you want a 16 intake and 12 exhaust? I was going to do 18 intake and 16 exhaust but I ended up selling both sets up cams.

BigBird03 · 09-05-2009, 06:16 AM

Quote: Originally Posted by julius717

if you got big turbo id ditch the BC2's in general. i had those with my big turbo horrible cams more for small turbo lower powerband. my .02

but i dont see anything wrong with what you are saying. Definitly is logical

ftl...i just bought some.lol

nemiro · 09-05-2009, 09:23 AM

I have some 16 cams, and would entertain something like this if someone wanted to work it. I am at high elevation with a 47# DCR S3. I would be interested in a smaller exhaust cam, to take advantage of the smaller turbo, and spool more quickly.

Matts04SRT · 09-05-2009, 09:39 AM

Well I am running a 60-1 set up on mine, and I was thinking that a smaller cam would help spool, cause a friend on mine has BC S3's and it increased his turbo spool from like around say 3800 to almost 5K. With the smaller cam on the int. it would close sooner helping spool, right? or do I have this backwards.

nemiro · 09-05-2009, 03:39 PM

IIRC, you need a smaller exhaust cam than intake for quicker spool. When I say smaller, I mean duration. I could be wrong on that, it has been a while since I have looked at it.

matthew00029 · 09-05-2009, 05:51 PM

Like I said 16 intake and 12 exhaust for spool!! You want your exhaust velocity to be up so you can spool your turbine faster.

quicky4JR. · 09-05-2009, 05:56 PM

We had a thread about this about 6-8 months ago. We tested big cam combo's like crane 20, 22, and 24.

We always planned on testing smaller cam combination's but never got around to it as its all of cam swapping labor.

nemiro · 09-05-2009, 08:04 PM

Do you guys have any 14's in stock? I am running 16's (on Nemo's recommendation), and they are just too much for my combination, at my elevation (~7000').

Matts04SRT · 09-05-2009, 08:35 PM

Okay so keep my BC S2 for the exhaust and get a S3 for the intake. Sweet, Ill have to try it out and see what happens

Matts04SRT · 09-06-2009, 12:53 AM

I am going to try it, Im gonna ask my friend if i can use his S3 intake cam and see if there is a difference. Ill keep you all informed, course I will have to wait till we have a dyno day to see what they really do. When I install them I will have them set to 0 on the cam gears.

BigBird03 · 09-06-2009, 05:05 AM

Quote: Originally Posted by nemiro

Do you guys have any 14's in stock? I am running 16's (on Nemo's recommendation), and they are just too much for my combination, at my elevation (~7000').

Ill trade you one of my bc2's for one of your 3s!

quicky4JR. · 09-06-2009, 12:26 PM

Quote: Originally Posted by nemiro

Do you guys have any 14's in stock? I am running 16's (on Nemo's recommendation), and they are just too much for my combination, at my elevation (~7000').

No sir we dont. Sorry

matthew00029 · 09-07-2009, 10:13 AM

Quote: Originally Posted by nemiro

Do you guys have any 14's in stock? I am running 16's (on Nemo's recommendation), and they are just too much for my combination, at my elevation (~7000').

Willing to sell the 16's? I seen some 14's for sale in the for sale section (BNIB $400).