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iTrader: (27)

I am getting a set of Patriot Stage 2 5.3 liter heads and am wanting to go with a TRex. I had planned on running the MS3 so I wouldn't have to flycut the pistons, but I would like to see some numbers so I can decide if the extra work is worth it. Thanks

xfactor_pitbulls

iTrader: (16)

With heads it isnt worth using that cam. The grind is intended more for the manorisms of a stock intake port. IMO, the G5X3 or a custom grind will net more power than either of the cams listed above.

Brandon

steveb

i have to agree, i would go with X3 or MS3. I personally went with the MS3 for cost and it likes the NOS better.

BAIN

iTrader: (5)

SlickVert put down 467 @ 6500 with ET heads, 90/90, and 12 bolt w/ 4.56 gears in a M6.

With smaller gears it would have put down around 480. Pretty impressive if you ask me. I think the guys saying the T-Rex won't work well with aftermarket heads are underestimating it a little.

lilbuddy1587

iTrader: (1)

I wouldn't go so far as to say that the ms3 likes nitrous better. The x3 has an 8 degree split as opposed to the ms3's 5 degree split. So I'd say it'd be the other way around

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iTrader: (27)

Ok well I guess I'll search around for a cam for these heads then, thanks!

Patrick G

iTrader: (14)

Brandon, normally you make very smart comments on this board, but your comment above is absolutley FALSE. The well chosen valve events that make the T-Rex work so well with stock heads are also the why the T-Rex is a superior cam for ported heads. Too often, cams of this size go too wide in the LSA, giving crappy dynamic compression and too late of an intake valve closing point...not the T-Rex. The T-Rex has a 109-110LSA which closes the intake valve earlier and opens the exhaust valve later. This helps pump up the dynamic compression while keeping the intake valve closing point in a window that works well with the LS6 or FAST intake. Look at other dynos of wider LSA cams like the MS3 or HPE S cam. They make great top-end but are lacking in the mid-range torque department. Why? Poor dynamic compression relative to the T-Rex. The T-Rex has violent mid-range torque and very strong top end power. Why? Better chosen valve events which work even better with ported heads than they do with stock heads.

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iTrader: (27)

Great guys, lots of info starting to pour into this thread-let's keep it going. Any more numbers or opinions out there? Let's hear them!

xfactor_pitbulls

iTrader: (16)

Pat, bottom line is that you can talk over and around me all day long about why it makes sense. I have seen cars with decent flowing heads and a T-Rex not put down the power, period. They switch cams and end up with more torque and atleast as much power on the big end. Why? Because the duration at .100-.600 is mated toward a head that flows a vast improvement in the higher lifts. An atleast decent head porter can gain 60-75% at the top of the lift range ~.500-.600. Down low, below .400, you are closer to gaining 25-50% Hence the need for a grind that is INTENDED for a different port profile. The 110 LSA helps to push the power higher in the cycle, thus using more fuel and air with a better DCR, but when have you seen a T-Rex powered car killing the H/C dyno records?

Brandon

NeverT00fast

iTrader: (4)

Woah..Can someone explain this? I went with the MS3 over the X3 thinking that the MS3 will put out more on the bottle.

offaxis

iTrader: (19)

Does anyone on this board have a h/c pkg with a trex making 470+ hp? Anyone?

When there are cam only trex cammed cars making 440-450 rwhp through 12 bolts I would assume that if it was such a great cam for ported heads someone must have picked up atleast 20- 30 hp. Maby they have and I just missed all the posts. I also think that it is a killer for cam only but on the cars Ive seen that have added heads the numbers never added up.

ReD_Z28

i might do that soon i am looking for top speed in m6 ,as trex and heads will keep it up till then

BAIN

iTrader: (5)

Most of the big h&c numbers you are seeing with smaller cams have small gears or stock 3.42's and a 10 bolt (non track cars). Most of the T-Rex cars are track cars with power robbing drivetrain and large gears. Like I said earlier if SlickVert had a 10 bolt and 3.42 gears he would be over 480, but that's not real track friendly now is it?

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iTrader: (27)

Well I am going to be a non-track car. What cam should I go with for my 5.3 stage 2 heads?
I would really like the Trex but am unsure on how much it'd cost a mechanic to install it (with the flycutting, etc etc). Anybody know? I'd really like to go this route so I can have a lot of midrange torque with a ton of power up top. I don't plan on going higher then 3.73 gears and I have a brand new 10 bolt that I'll be getting a girdle and new axles for.

Patrick G

iTrader: (14)

If this is not going to be a track car, spare yourself the agony of living with a top-end oriented cam like the MS3 or T-Rex and get something milder. For strong area under the curve and great top end power, my cam is an an absolute joy to daily-drive and street race. Specs in signature. When in doubt, go a little smaller.

xfactor_pitbulls

iTrader: (16)

Something we can both agree with!

Brandon

bad95killer

i completely agree with Pat in this..if do a search on this section then you'll be the judge & milder combo would make ya more happier on street

just my .02

peace

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iTrader: (27)

What sort of track times could I expect with the mods in my sig, plus 5.3 stage 2 Patriot heads (297cfm @ .6) and a 224/228 .637/.639 110LSA cam?

steveb

I would also like some one to explain this, after i did lots of home work on the MS3 and X3 i chose the MS3 because it seems to like the juice better. This is the first time i have heard the X3 is a better bottle cam, i would like him to explain more or show some dyno charts.

STEVE

DocEwww

iTrader: (1)

I know of somebody that did 610rwhp with TEA heads/ X3 and a 150 TNT.

Then again theres Termin8r's car that does 640rwhp with stock heads and a 200 shot with a MS3. You wont be dissapointed with the MS3/spray combo.

My cam is right in between the two and ****** rips on the spray.