budhayes3

iTrader: (19)

If you decide on the TR224, I wouldn't go any smaller than 3200 on the converter IMO. I think that something along the lines of a Vinci Trucker (216/224 .551/.551 115) would be more suited for a heavy brick Tahoe, but guys have made the bigger TR224 work in similar set ups. I believe that Zippy has that cam in his wife's Tahoe with 5.3 heads, but I'm not 100% sure.

I'd also look into the TR220 as another option before you made your final decision

sleeperlqx

iTrader: (3)

One of the main reasons I started this thread, was because I thought the TR224 was HUGE!, realistically a 3.2K stall in a daily driver heavy Tahoe pig will suck. I just didnt know if it was the correct cam, and Im starting to think its not, with such a huge stall requirement. Yes Zippy was the guy I was reading about who gave me the 5.3 head idea.

I agree with the others on the 243 heads as well, but I need something simple and quick, and looks like Im just going with the simple cam, springs, pushrods right now. And getting the engine in a tuned.

That being said I was suggested by a very close friend, who helps me alot in these cases a cam around 218/224 with 114 to keep my likings happy. As after all the stock lq9 cam is a 196/201 which outputs 345hp! The 218/224 will be a HUGE Step up from stock, retain gobs of the LQ9 bottom end, and throughtout, and is more suited for my application in a nutshell.

budhayes3

iTrader: (19)

I like the 218/224 better myself for a heavy Tahoe, and you could run it without a higher stalled torque converter, but it would really work out better with something along the lines of a 2600-2800 converter, which I know Chris from Circle-D could build for you, with good street manners at part throttle and awesome response at full throttle (flashing to it's stall speed when you mash it )

ForcedTQ

iTrader: (1)

Since you're keeping those stock 317's and hence the stock static compression ratio, you'll want to make sure you don't loose too much dynamic compression ratio from a too late intake valve closing event, and watch the EC/IO valve events for overlap. Too much overlap and you'll ruin your lowend, while having to wait for high RPM power to come in.

I agree with the other guys on here, it'd be ideal if you could upgrade to 243's or even better "worked" 243's. If you did it at the same time as the camshaft you could get a cam spec'd for what combination of parts you have and be done with it. Increased compression ratio on that beast would really wake it up, you'd just need to make sure the tuner dials in the timing curve pretty well.

Good luck.

kwk174

iTrader: (5)

I am running the comp cams XE-R 273 with stock 317's and larger valves. It is working very well with my 3000 stall. Great range in the power band. From wideopen throttle i see good power around 20 mph.