Information regarding the Thunder Racing T-ReX V.2 camshaft

[J-Rod]

From Jason


Information regarding the Thunder Racing T-ReX V.2 camshaft

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I figured now is an excellent time to update everyone on the new camshafts we have developed recently. For the most part, we are done with the preliminary testing and only have a few minor things to wrap up. They are ready for sale immediately and can be found on the website at this link:

Thunder Racing T-ReX camshaft : http://www.thunderracing.com/index.cfm?fuseaction=subcategory&subcategoryid=1114#T1159

For those who have not been been following the progress, here is the thread in the Dyno section:
http://www.ls1tech.com/forums/showthread.php?t=138439

TRx V.2 cam

SPECS

Thunder Racing TRx V.2 - 242/248 .608/.612 110lsa +2

Piston to Valve clearance

When going with a cam of this size, piston to valve clearance becomes more of a concern. Both of these cams are well within the spec of allowable clearance with stock heads and stock shortblock. They are, however, on the tight side of the spec, but definitely something that can be used with the proper attention being paid to the install (intake centerline) and valvetrain selection.

The cams have the following PtV with a stock cylinder head (stock valves, stock valvejob, no milling), '98/'99 GM graphite gasket (.053", compressed), stock shortblock (pistons .007" above deck), and a 108* intake centerline:

V.2: Intake .070", Exhaust .090"

For those that feel that this is too tight and are uncomfortable with this clearance, we do offer the ISKY flycutting tool which will make valve reliefs in your stock pistons. The heads do need to be removed to perform this task, so be prepared to purchase new gaskets and bolts. You can notch the pistons with the motor still in the car. You can also just select a smaller camshaft and not have to worry about any of this.

The pistons in my car are not notched and I have had no problems with any PtV.

Valvetrain

We recommend either the Comp 921s or Crane 144832 dual springs due to the aggressive nature of this cam. Thunder Racing 7.400" hardended pushrods are needed as well.

Tuning and Driveability

Tuning is going to be an absolute must with either of these cams to get the idle and driveability sorted out. Once the tuning is taken care of, for a cam of this size, it drives pretty well. Still, this cam is not for the faint of heart. It was designed for those looking for a cam that makes very impressive power with stock heads. It can be used in a daily driver if you don't mind the driving characteristics of a large cam. For those looking to drive this cam everyday, I would recommend a complete tuning session, gears (4:10s or steeper in a M6), and a loose converter in an A4 car.

From my limited street time with the V.2, it really is quite driveable. I just put 25 miles on the car in the last hour with the Hooker catback installed and it is much better now with some additional tuning Geoff did.

We will be spending a full day early next week taking care of the final driveability tuning. It is 10x better than what it was with the stock tuning.

Rest assured, this only the beginning of the new camshafts Thunder Racing will be offering. The V.3 is already in the works.

If anyone has any specific questions regarding this cam, post here or sent me an email (jason99ta@hotmail.com). I'll be more than happy to help you as best as possible.

Jason

[Darkhalf]

:eek: They keep getting bigger and bigger :eek:

[SeaHawk]

How does this cam perform if you decide to have head porting done in the future?

[FastAl]

Originally posted by SeaHawk
How does this cam perform if you decide to have head porting done in the future? That's what I want to know. My little 224 cam is likely to be pulled out in the next year.

[pewter01Z]

damn those are some nice looking specs :)

[AtomicVette]

how does that affect valve train wear? how often are people expected to change springs?

[killer01ws6]

Originally posted by Justin98TransAm
how does that affect valve train wear? how often are people expected to change springs?

Oh that is a Monster Cam..
You will need a very good valve train for that puppy.
I would say a good dual spring setup, to cut down a little on how quickly you have to change the springs.

[bRa_DeN]

Originally posted by FastAl
That's what I want to know. My little 224 cam is likely to be pulled out in the next year.

i know what you mean my little tr224 might get eatin by the t-rex this summer

[SAR2K]

Originally posted by SeaHawk
How does this cam perform if you decide to have head porting done in the future?
We'll findout in the next two weeks. I'm porting a set of heads for Jason right now. So far the heads are brutal flowing 301 @ just .560 lift, I'm still toying with the exhaust as it's at 216 @ .700 before a valve job.
I'll post the results after the swap.
Steve...

[Mike K]

That is one hell of a cam.

[PC PaiN]

Looks like TR is getting ready to join the large ass cam game. I'm waiting for track times.

[LS1 2001 Z28]

Looks crazy caint wait to build my motor and put in a cam like that. What kind of idle speeds are we looking at for a cam like that?

[03ToRcHrEdVeTtE]

those #'s are just plain sick :jawdrop:

[Michael]

Looks impressive, but it's funny how so many people are ready to jump on it. Even with a killer tune, it would have to be terrible on the street. There is more to drivability than not dying at stoplights. I think some of the buyers will have regrets, especially if they have not driven a radical, on the edge of streetability motor on the street before. I would imagine alot of the young guys haven't. I'm sure it would be fine to drive to the track, maybe a little weekend street crusing. But to drive something like that to work and heavy traffic all the time would be a bad idea imo. It would be great for a stroker. I would consider it for my 427. But like they say, the dyno makes the money. But this cam should be marketed for the track.

[98SSBlackattack]

More of a track car cam than a street driven car.If you drive your car everyday i would stay away from that monster.

[LS1 2001 Z28]

Oh yeah for my street car i wanna do a Zo6 cam or something mild because i am kinda a bitch when it comes to rough idle. But on a drag car that would be very cool, i couldnt imageine doin a cam like that in my daily driver.
Tony

[SAR2K]

Originally posted by Michael
...Even with a killer tune, it would have to be terrible on the street...
Not so. This cam is VERY tame on the street. The driveability is damn good. Daily driver material... might be pushing it a bit, but it's WAY tamer than you think. People don't realize how much cam you can get away with on the street with todays EFI systems and roller profiles.
Steve...

[Beast96Z]

Originally posted by SAR2K
Not so. This cam is VERY tame on the street. The driveability is damn good. Daily driver material... might be pushing it a bit, but it's WAY tamer than you think. People don't realize how much cam you can get away with on the street with todays EFI systems and roller profiles.
Steve... WERD Beast96Z====>waiting on the V.3:D

[pewter01Z]

I don't see why some would think it is too extreme for the street. It isn't too much bigger than a G5X2 or M2. I haven't seen specs on a G5X3, but I assume it is about as big as this cam, maybe a little smaller. All those cams are street driveable. Tuning takes a lot of the problems out of cam'd cars. Back 4 years ago a B1 or T1 was extreme for the street cuz we had no tuning. Now they are unheard of almost ;)

[JohnnyLS2]

Actually, having a smaller faster ramping reverse split cam is much easier on your valvetrain and generally produces more power VS the large donkey dick cams.

I currently have a 224/228, .581/.581 112LSA cam and its hard to drive. Lopes hard, will stall out, hard idle... I cant imagine someone wanting anything more than that. Besides, I highly doubt its worth a significant increase in power to make the car unbearable to drive...

[Jason99T/A]

Here is my post on ls1tech.com that Jarrod referenced in the first post in this thread where I answered alot of other questions:

http://www.ls1tech.com/forums/showthread.php?t=139004

This cam is not for everyone's current setup. I have had emails from people wanting to put this cam in a bone stock, automatic car with stock gears/converter. Not going to be much fun in that car. :o However, with a properly setup car and the proper tuning, this cam is very liveable on the street. It's just not a bolt in and go, as alot of tuning needs to be done to get the idle and low-speed driveability where it should be.

Jason

[Marvin]

I just think it's too much cam for most cars...