GEARHEADZ - I need cam advice.

[MOBS]

Yeah, sorry, officially recognized as LT4 hot cam....but a cam grinder would know wutcha meant by LT1 hot cam....it's a hot cam for the LT1 engines, LT1/LT4 Hot Cam swap....google that and you'll see what it's all about.

 

[MOBS]

But as I later added also, a police cam might be good enough for what you're wanting.

 

[MOBS]

Check this link for the sound differences....but you'll be looking at 1.5 rockers, or a much lower lift cam, but that gives you an idea of what the exhaust duration sounds like.
http://www.youtube.com/watch?v=IUYACyffyHU&feature=related

 

[Vortec Lover]

Sounds a lot better with that cam on it. Thanks for all the help guys! I'm looking around quick for more info on the swap...I take it that an LT1 is the stock cam. (I'm new, but learning quickly, thanks to all of you vets on here.)

http://store.gmperformanceparts.com...c roller (LT4 hot cam) &model=<!--24502586-->

Link for this info ^

Part # 24502586
Hydraulic roller (LT4 hot cam), (1.5 rocker)

Duration @ .050 Lift (deg): I: 218, E: 228
Maximum Lift (in) w/1.5 rocker: I: .492, E: .492
Lobe Centerlline (deg): 112
Technical Notes: Service only. For all V-8 engines with roller cams.
ABOUT THE LT4 CAMSHAFT: The LT4 camshaft P/N 24502586 was designed to be used in many different engines. The following change may be necessary for correct engine assembly: For LT1 and L98 engines (pre-1996) the dowel pin in the end of the camshaft must be pushed in so extension from end of cam is .30+/- .01. For 1996 LT1 and LT4 engines, the dowel pin is in the correct position extending .620 from the end of the camshaft. This cam has a fuel pump lobe.


Since you said I'm running 1.5 rockers and my lift max is .470, will I have to machine my heads to fit this in there, or if I change out my springs and stuff will I gain enough clearance? Again, thank you for listening to a complete idiot.

 

[bluex]

.470 is the max for a stock spring setup iirc. I would swap them just for some extra room. Much more lift than that an your going to need some machine work on the guides/spring seat....

 

[am92]

Yeah, to use that cam you'll need to either machine you valve guides down, or you can use beehive springs and comp 787 retainers to get enough clearance. If it were me I'd use these springs http://www.summitracing.com/parts/NAL-12499224/ and these retainers http://www.summitracing.com/parts/CCA-787-16/

 

[Vortec Lover]

.470 is the max for a stock spring setup iirc. I would swap them just for some extra room. Much more lift than that an your going to need some machine work on the guides/spring seat....

So, if I'm understanding this right, I can fit in that LT4 Hot Cam with a .492 as long as I swap out my springs? (don't worry, I don't think I'm going to be going any higher than that.)

So, after I swap out the cam, springs, retainers and lifters, is there anything else that I would need to do? Will it run on stock computer settings until I get it retuned? Or should I tune it first? Do I need to advance the degrees? (I'm not sure what that means exactly, but some other guys were talking about how they had to do that.)

 

[am92]

Springs and retainers and it will fit. But it has to be those specific retainers because they are thinner or something to give extra clearance. (I think Crane Cams makes another spring/retainer kit that does the same thing but its more expensive) You should probably have the tuned computer ready for when you put the cam in, otherwise it will run like crap with the stock tune. As for getting it degreed, im not to sure about that part

 

[bluex]

So, if I'm understanding this right, I can fit in that LT4 Hot Cam with a .492 as long as I swap out my springs? (don't worry, I don't think I'm going to be going any higher than that.)

So, after I swap out the cam, springs, retainers and lifters, is there anything else that I would need to do? Will it run on stock computer settings until I get it retuned? Or should I tune it first? Do I need to advance the degrees? (I'm not sure what that means exactly, but some other guys were talking about how they had to do that.)

Idk about that, I read your post wrong an was thinking you were only gonna run .470 on the lift. At .492 I think your going to need machine work or your valve seals are gonna hate life, but I can't remember for sure...

No you won't advance the cam any, it is completely computer controlled so it won't like you if you do that....

 

[MOBS]

What i've done with all valve seal heads, is swap-in the old umbrella seals, retainers, and machine O-ring groove into valves. You can also have the valves shot-peened for extra oiling. With the older O-ring type oiling system, your max lift is .500"

The LT1 is actually a name of an engine, technically it's the LT1 Generation-II(2). Let me check that cam you found a little more carefully, because you have to make sure they used a standard blank(has mechanical pump operation and no water pump attachment), versus the earlier hot cams that were based on a reground LT camshaft with no mechanical pump setup and attachment to run water pump off cam.