I’m building a LQ4 too swap into my 2002 RCSB. The truck already has a 3600 stall, 4.10 gears, headers, and a TBSS Intake with 36lb injectors. I’m gonna be running 862 heads for the added compression and PAC 1219 valve springs. How does this cam look for my build? The truck is gonna be a daily driver with the occasional trip to Mexico. Any tips or advice will be grateful as this is my first engine build.

 

Was this camshaft spec'd for your build? In my opinion it looks good with that compression ratio, without the compression it's a little to large. You have all the supporting mods should be a ripper and have a nice lope with the 10* overlap.

 

Yessir it was spec’d for the build. I’m hoping to run mid 12’s maybe a bit lower with this setup. Still have to figure out which main, rod, and cam bearing to go with. Then it should be ready to go together.

 

I used King Bearing in my LQ9 build and they plastigauged on the money. That Pat G camshaft is pretty close to the Texas Speed Torquer V2 with 232/234 .600"/.600" 112* lsa. I'm installing (as I'm typing lol) the TSP Torquer V4 cam 231/234 .629"/.615" 111* lsa along with a pair of their PRC 225 heads. My calculations has me around 11.4 compression with flat tops and 62cc chambers. You basically have the same truck as mine... rcsb, 410's, 3200 stall etc.

 

Dang I bet you’re truck is gonna scoot along nicely with that setup. I’ve been debating on a set of PRC heads. Especially since Texas Speed is only an hour away.

 

It's very similar to the cam I was thinking of running in my lq4. I was gonna use my 706 heads and get tsp 2.5 for compression and the cleetus bald eagle na cam.. its 227/234 600 600 111.. I really would have rather it been at 113 or 112 but it is what it is. I think this would be a 425ish whp build maybe more. Just my opinion tho.. I have seen similar combos make 450 with those exact heads.. but my motors used and high miles so doubt it will make quite that much

 

can always custom spec a cam to whatever you want.

 

Did you use SI or the H series bearings? What did you end up with for thrust?

 

very true.. it will just depend when I get to that stage I'll ask tsp what they think when I order.. I still need to do rear end and tranny first. I already cant get traction till second on a stock motor with tbss headers and tune

 

The cheaper SI bearings.

Thrust Bearing Clearance? or Crankshaft end play?...
you can see the the slightly tighter squish on the thrust in the photo (left)

I jotted this down on "notepad" during the assembly

__________________________________________________ ________

Mains .0015 (approx)

Rod Bearings .0015 (approx)

Crankshaft End Play .005

Ring Gap

#1 = 1st = .021 2nd = .022
#2 = 1st = .021 2nd = .022
#3 = 1st = .022 2nd = .023
#4 = 1st = .021 2nd = .022
#5 = 1st = .022 2nd = .023
#6 = 1st = .021 2nd = .022
#7 = 1st = .022 2nd = .023
#8 = 1st = .022 2nd = .023