tiresmokinV8

iTrader: (6)

Im running a tsp vvt-2 cam in my ly6 since thats all that tsp had as far as vvt cams were the ones for the camaros. Now i see that they make 4 cams for l92 and im guessing ly6. The largest is mid 220 duration and is for aftermarket heads says their site which is around what my vvt2 cam is. Wondering if it would be worth getting a cam for the truck engine instead of the current l99 one? Emailed tsp and got the response on it wouldnt make a difference.

futureuser

iTrader: (1)

Why are you looking for a different cam? It could be the tune. Also, noone really makes cams just for our Ly6. The LS3/L92/L99 cams should be close.

1989GTA

"The largest is mid 220 duration and is for aftermarket heads says their site"

They also make a VVT3 camshaft that is around the 230-231 duration range. The above poster is correct regarding which motors these cams will fit.

85MikeTPI

iTrader: (9)

As I suggested if your build thread, you should really degree your cam since it sounds like you have a mismatched core and phaser. The phaser table in the tune also is relative tithe degreeing so you may be leaving a lot of power on the table. (will also give you the chance to replace that TTY phaser bolt you reused.. ).

The truck vs car VVT cams is mostly about getting more TQ and matching the cam to the intake since trucks use the larger and longer runner intake.

tiresmokinV8

iTrader: (6)

Ill have to ask tsp about the degreeing since they are supposedly on different cores. Tsp has tuned several ly6 trucks with the vvt1 and 2 cams so i would think theyd give me a heads up that the cams are positioned differently and need to be degreed to put it in the correct spot. My truck still hasnt been on the dyno so i dont know how the power curve really is and from the feel hopefully all that is needed is a tune. It cruises just fine around the city and highway in the lower rpms 1500-2000rpms but in first gear take off theres a very noticable power increase after say 3500 maybe higher which is fine rowing through the gears since shifting at 6500 puts the rpms back at 4500+. If i take it easy at the launch on street tires so that it doesnt roast them off the line and then get on it it will be fine until the higher rpms then the tires will break loose. Thought vvt was supposed to spread out the power more? Its just tuned by me so that could be the reason haha.

1989GTA

Let us know what you find out from TSP.

tiresmokinV8

iTrader: (6)

I will.

Che70velle

iTrader: (6)

I would invest a few bills in a reputable tuners shop, before I tore back into it.

tiresmokinV8

iTrader: (6)

Called tsp about the cam and they said that they grind it on the core according to what phaser p/n I have. Thats why they ask what phaser I had when I ordered, for the correct phaser limiter and core. So I should be good. Going to get it tuned end of this month.

1989GTA

Yes, that is something everyone using a VVT cam should be aware of. There are two different cam phasers and cam cores. I have a 2009 Escalade L92 motor but it has the earlier phaser. So be careful when ordering the parts. Check the part number on the phaser in your motor and buy the appropriate cam for it and cam phaser limiter kit.

tiresmokinV8

iTrader: (6)

Yea I knew that there where different phasers depending on year and thats what they said when I ordered the cam so thats why I thought they asked for the phaser p/n, so they could get me the correct limiter but didnt know about the cores at the time and they didnt mention anything but since they had already done testing of the vvt 1-3 cams in a ly6 test engine at their facility at that time I figured they knew what they were doing. Dropping the truck off to be tuned on the 23rd so we'll see if something isnt right.

1989GTA

This has been posted before in other threads but worth repeating. The earlier cam core is number 156 and goes with Comp Cams phase limiter 5456. I don't have the number of the earlier GM phaser in front of me but I believe it ends in 944. The latest cam has a core number of 189. I don't know the Comp Cams phase limiter number or the later GM phaser number. Just beware that you order the right parts or you will be off something like 13 degrees on your camshaft timing.

tiresmokinV8

iTrader: (6)

Thanks man thats great info. Well see what kind of power im putting down in a few weeks hopefully they are as good as people have been telling me and can get a fair amount of more power out of my truck. Top end seems pretty strong but i could always use more cruising power down low and better mpg. Need to fogure out the launch. Maybe my drag radials arent right for my setup?

1989GTA

Looking forward to your results.

hicksport

iTrader: (1)

Were you able to improve upon the tune that I sent you? Just wondering if you were able to get it any smoother.

Gus 82

iTrader: (2)

I have a 4.8 with the newer style phaser. The cam I installed was from a forum member with lttle knowledge of what core is was. Is there a easy way of figuring it out?

1989GTA

"Is there a easy way of figuring it out?"

With my VVT-3 camshaft from TSP the cam core number was on the outside of the box. I expected it to be etched on the camshaft but it was not. Maybe contact the people who ground your camshaft.

Gus 82

iTrader: (2)

That's the problem I don't know who did the grind. It has the barcode on it like a factory gm cam and some other hand etchings. Definately not a stock came and has been in the engine 3 or so months. Just doesn't have any pull on the bottom end. 219/228 550/550 114 in a 4.8. I have another post today about it and saw someone mention on this thread about decreeing to make sure its correct core.

tiresmokinV8

iTrader: (6)

Hmmm maybe? Haha its been so long and ive tweaked the tune so many times since then that its hard to tell. My laptop has a power supply issue where it wont accept power anymore not aure of the power port is worn out from being my only computer for 8years or something. For now im stuck using the internet on my phone and looking for a replacement laptop. Once i get a working laptop ill email you my file for you to try.

just checked out my comp cams box from tsp since i still have my stock cam sitting in it and all the tags have been scratched off.

1989GTA

"just checked out my comp cams box from tsp since i still have my stock cam sitting in it and all the tags have been scratched off"

Mine was like that to. However on the side of the box towards one end the core number was still there. Mine was something like 189-000-1. So it will start with either a 189 for the later cam core or 156 for the earlier cam.