vidan27

Anyone ever use this cam? 219/223 .617/.595 114+3. Tick recommended it for my setup. I am currently running a BTR 224/230 .553/.547 111+3 with a 76/69 turbo, CNC 243 heads milled .030. Making 425 rwhp on a conservative tune with 10psi and 50/50 water meth. Power drops off at 5500 rpm. Is my turbine too small? Trying to decide if upgrading my cam would be worthwhile. Any suggestions a would be appreciated.

Thank you,
Kyle

03sierraslt

iTrader: (22)

What engine do you have?

vidan27

5.3 lm7

04gibbstahoe

iTrader: (13)

Your turbo size seems fine to me. My old setup on my 2004 tahoe 5.3 was a 220/226 114 comp cam with the mp112 blower and I made peak power(450rwhp) at 6100rpm. Having said that your cam is not what is causing your power drop at 5500rpm since you are running even larger cam duration than I was. Unless something unusual is going on with your turbo setup than I would guess this is tune related. Could be fueling issues in the high rpms, timing retard due to high intake temps, etc.

What size A/R housing on the turbo?

vidan27

.96 AR housing. My 4l60e let go right after the dyno. I wanna say the second or third drive after. Completely let go. Maybe that contributed as well. Tune looks pretty good. Since I've swapped to a 4l80e but haven't had it on the dyno yet. Seems more effecient requiring less fuel across the board. I was just looking for some opinions on swapping my cam out. Not looking for a ton more power at the moment. Thank you.

1CAMWNDR

iTrader: (21)

That current cam is a lot of exhaust lobe for a small turbine with a small housing......Even with the Tick recommended cam that is a lot. Will it work? Sure to a point. 425whp on a turbo 5.3 at 10psi means the combo is off. Yes that turbine is quite small. Either you need a bigger turbine turbo, or smaller cam, or both. A 5.3 with a 212ish° to 218ish° cam is plenty to make about 600whp with the right turbo.

I think I would look at getting a larger turbine turbocharger since that will be easier to change, and will work better with the tight LSA and larger exhaust lobe of your current cam.

vidan27

Yeah. I decided to do a turbo setup and see how the cam worked before I swapped it. I might upgrade to a 78/75 and see what that does. Or a cam swap. I had a custom one spec'd. 223/223 .617/.617 115+5. Not sure the route I'll go. Just wanted some input on the cams I had mentioned. Thanks to all.

vidan27

Thanks 1CAMWNDR1. For some reason I just saw your post. I think I might upgrade to a VS Racing 78/75 in the future. Several custom cam enthusiasts have said my current cam is better than stock but not optimal, but as well should be making good power. My tuner thinks it's the cam due to the 111+3 LSA. I do feel a power increase after the 4L80E swap. Definitely running richer as my STFTs are pulling more. My Circle D converter was probably the best investment of all, of course with the 80E. Possibly my 4L60E and TCI stall just wasn't cutting it and leaving a lot on the table. Litterally 50 street miles after my tune the 60E let go.