TREX or G5X3
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Originally Posted by 2MuchRiceMakesMeSick
Well I was talking about the package cause I dont know anyone who uses the stock springs...etc when they install one of these cams
The trex http://www.thunderracing.com/catalog...&vid=3&pcid=51 cam package for 764.99 + 175.00 = $939.99
I just called LG $1350.00 for their cam package
A difference of 410.01
The trex http://www.thunderracing.com/catalog...&vid=3&pcid=51 cam package for 764.99 + 175.00 = $939.99
I just called LG $1350.00 for their cam package
A difference of 410.01
Originally Posted by 2MuchRiceMakesMeSick
Well I was talking about the package cause I dont know anyone who uses the stock springs...etc when they install one of these cams
The trex http://www.thunderracing.com/catalog...&vid=3&pcid=51 cam package for 764.99 + 175.00 = $939.99
I just called LG $1350.00 for their cam package
A difference of 410.01
The trex http://www.thunderracing.com/catalog...&vid=3&pcid=51 cam package for 764.99 + 175.00 = $939.99
I just called LG $1350.00 for their cam package
A difference of 410.01
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.
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
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
Last edited by Josh; Jun 10, 2004 at 09:18 PM.
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.
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Verdad Gallardo 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!
Personally I've got a Grand Am Cup cam planned, so I'm really not concerned with driveability.....I'll drive ANYTHING! 
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
Josh
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From: Gainesville, Denton TX
Originally Posted by Josh
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
Josh
Damn I need money course I need headers/exhaust/suspension etc too...
Originally Posted by SSOnYourSix
The problem is below 3000, where daily driving occurs...
: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.
TECH Regular
Joined: Jan 2004
Posts: 482
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From: Somewhere in Cajun Country
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.
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. TECH Regular
Joined: Jan 2004
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From: Somewhere in Cajun Country
Originally Posted by 35th SS
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.
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Joined: Sep 2003
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From: "Tr"Asheville
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
-Sly
Originally Posted by Taspeed
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
I will let you know how the T-rex works with my new 408 iron block on the way 