Also with your 2000, you'll need injectors and F-pump.

 

Get what you pay for... Im sure you will be happy with either cam, but it comes down to one offering more drivability, and one offering more power... I do too much street driving and only run 3.73s so I love my X3... but I have also yet to try a TRex so I really cant comment on its comparison beyond what ive heard... if you can talk someone in AZ into one I can give you feedback and compare... but I pretty much have the market here covered with LG stuff

 

swapping to the trex as soon as I get all my parts from thunder.

 

Yea, the $$ is a factor and so is daily drivability. Anybody have the trex on a daily driver, cuz the X3 from what I have heard is pretty good on the street.

 

The TREX Package uses Crane springs, retainers, etc The LG Package uses the more expensive Comp 921 kit, so that's what makes the price a bit steeper, so it's not the cam that is the big factor, the springs, etc are gonna hurt the pocket book.

As for the injectors, not really neccessary, I am using the stock '99 injectors and stock pump on my X3 setup with every bolt on, but they are near the max, so I bought some 28.8lb injectors from Texas Speed for $60 brand new, can't beat that deal! And they came with a new fuel rail too! That should be good to 450-500 rwhp.

 

just my .02. based on what people have been saying about the trex and the dyno's that have ensued, I think the trex would be better suited to a larger cube motor. Its a good cam, but I think there is more in it than the 347's are going to put out. I would use the g5x3.....errr or maybe the rpm4

 

With a good tune and 3.73s or 4.10s, I think the T-ReX would be nearly as driveable as the G5X-3. With tuning, I think the only issue you may have is low RPM surging. I drove my car with the T-ReX on the stock tune with stock gears for nearly a month and didn't mind it. I don't drive my car everyday, but if you want a big cam, you're probably willing to sacrifice a bit of driveability.

Like I said, it may just be me, but I think a lot of folks blow the whole "the T-ReX isn't driveable" thing out of proportion, especially since many of them have never even ridden in a car with the T-ReX, much less driven one.

Josh

 

Josh, I agree, and the same goes for the G5X3, both cams get a bad rap when people don't own them. I have never driven or been in a car with the TREX, so I don't know how it drives, just what othres say. Both cams are the big dogs out there and both make the power, it's all up to the buyer to do the research and choose based on their needs and likes.

 

Now i'm not bashing either cam, I'm just looking at the way a majority of the people drive that ask about "streetability", and the trex might be questionable for someone like that. Now someone like me...i like high rpm bands, but i think he may want something with a little more grunt down low. I think the g5x3 would better fit bill on this one Personally I've got a Grand Am Cup cam planned, so I'm really not concerned with driveability.....I'll drive ANYTHING!

 

What's a Grand Am Cup cam?

 

damn $1,350.. cam$450 i think.. spring kit $500.. wheres the other $400 go on the g5x3 package

 

I would imagine you could use Crane duals with the G5X3. From everything I've read, they're as good as, if not better than, the Comp 921s and significantly cheaper. I know Thunder recommends the Cranes for the T-ReX.

Josh

 

Another thing, does anybody have sound clips of either cam idleing or revving?

 

For 175 more you would think the 921s would be the better deal. But considering TR recommends the Cranes, and its there design, I'd do what they suggested....

Damn I need money course I need headers/exhaust/suspension etc too...

 

no offense but its funny to see people use that arguement against the T-rex. when someone is comparing a say a tr224 against the x2/x3/trex ect, and they want low end / mid range tq and driveability most people say who cares about 3k and under get the big cam. and yet when trying to talk up the x3 suddenly driveablity, daily driving, and low end power comess into play :

from what i've seen josh is correct, the x3 and t-rex have almost identical numbers until 4500 and then the t-rex has more top end.

 

I'd like to know who's opinion is it that the comp 921 are better than the cranes?? How come the comps had valve float up top with the T REX and the cranes did not?? I guess the more expensive comps are not as good as the Crane lol!!! Make your own decision. I've got a T-REX F/S now for 310.00 shipped, one month old, only b/c my car totaled out.

 

sorry to hear about your car 99ws6ls1t/a.still waiting on my crane duals and retainers from thunder and swap this trex in on mine.

 

Thanks, I guess it's on to bigger and better things now.

 

lol it's funny how some people give their opions on the 2 cams when they don't own or haven't ridden in cars with them. What I don't get is how these people can talk about them when no one knows the specs on the G5x3. How can you build a proper setup with that cam when you have no clue what it's specs are, granted it's not small but still. Personally I'd go with the trex, it appears to make more power up top which is what you must be looking for putting a cam this size in.

-Sly

 

My stock bottom end didnt hold up 2 well with the T-rex as it threw a rod last week I will let you know how the T-rex works with my new 408 iron block on the way