Meanest pulling cam?
Originally Posted by PREDATOR-Z
His title said hardest pulling. Everyone knows you can't have 1 cam fits all.
Otherwise title should say "what kinda cam could drag, autox and road race"
I know of some poeple using G5X3 for that purpose.
Otherwise title should say "what kinda cam could drag, autox and road race"
I know of some poeple using G5X3 for that purpose.
THe G5X3 and G5X4, I've seen them when I'm reading around, are they known to be a midrange and upper end puller like the T-rex is?
I'm also curious, that camshaft that you spoke of above, the high lift T-Rex, the specs on it are different than the one listed on Thunder Racing's site. What type of power band would a person be looking at with the high lift T-Rex you speak of above? Would it be in the 3K to 7K RPM range?
Thanks!
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Yes depending on supporting mods of course.
I would call it T-Rex (V06) >>> Version 2006
The only difference is a LSK intake lobe, this in theory should increase the intake charge potential and combined with the LSK ramp profile, give better midrange pull earlier than the actual T-Rex
basically following the recent trend of using LSK on intake instead of the XE-R.
All the other cams being LGM/Futral/TSP, have had similar revisions, even Thunder but they like XFI lobes.
Maybe someone will have the Cahoonas to try one and give us more feedback.
note that I would recommend Morel lifters, PRC platinum springs and adjustable rockers such as Jessels with that cam.
All said it is a mean **** on paper
25.5>26* overlap at .050 on a 110 LSA (that is thumping
)
I would call it T-Rex (V06) >>> Version 2006
The only difference is a LSK intake lobe, this in theory should increase the intake charge potential and combined with the LSK ramp profile, give better midrange pull earlier than the actual T-Rex
basically following the recent trend of using LSK on intake instead of the XE-R.
All the other cams being LGM/Futral/TSP, have had similar revisions, even Thunder but they like XFI lobes.
Maybe someone will have the Cahoonas to try one and give us more feedback.
note that I would recommend Morel lifters, PRC platinum springs and adjustable rockers such as Jessels with that cam.
All said it is a mean **** on paper
25.5>26* overlap at .050 on a 110 LSA (that is thumping
) Last edited by PREDATOR-Z; Oct 29, 2006 at 09:56 AM.
Originally Posted by Ted J
The car will very rarely ever get road raced, mostly 1/4 mile racing and drifting actually! Some autocrossing as well but the car has pretty low gearing. More on that in my next response but I hear what you are saying.
The contradiction is much greater in a 3400-3500 lb F-body with stock 3.42 or lower numeric gears. I think you'll be happy with the cam PREDATOR-Z is recommending.
Originally Posted by PREDATOR-Z
Yes depending on supporting mods of course.
I would call it T-Rex (V06) >>> Version 2006
The only difference is a LSK intake lobe, this in theory should increase the intake charge potential and combined with the LSK ramp profile, give better midrange pull earlier than the actual T-Rex
basically following the recent trend of using LSK on intake instead of the XE-R.
All the other cams being LGM/Futral/TSP, have had similar revisions, even Thunder but they like XFI lobes.
I would call it T-Rex (V06) >>> Version 2006
The only difference is a LSK intake lobe, this in theory should increase the intake charge potential and combined with the LSK ramp profile, give better midrange pull earlier than the actual T-Rex
basically following the recent trend of using LSK on intake instead of the XE-R.
All the other cams being LGM/Futral/TSP, have had similar revisions, even Thunder but they like XFI lobes.
Originally Posted by PREDATOR-Z
note that I would recommend Morel lifters, PRC platinum springs and adjustable rockers such as Jessels with that cam.
All said it is a mean **** on paper
25.5>26* overlap at .050 on a 110 LSA (that is thumping )
All said it is a mean **** on paper
25.5>26* overlap at .050 on a 110 LSA (that is thumping
)
Originally Posted by hammertime
I missed the vehicle that its going into in your signature. With that gearing and your projected weight, you'll have much more tolerance for a soft bottom end. If the final setup doesn't have a softspot that comes on like a lightswitch at 3000-3500 rpm, it might make your car easier to drive on a road course.
The contradiction is much greater in a 3400-3500 lb F-body with stock 3.42 or lower numeric gears. I think you'll be happy with the cam PREDATOR-Z is recommending.
The contradiction is much greater in a 3400-3500 lb F-body with stock 3.42 or lower numeric gears. I think you'll be happy with the cam PREDATOR-Z is recommending.
I also was thinking of maybe doing a single turbo on the car right away as well and just not revving the car as high and making more midrange and upper end power. The money I'd spend on custom headers (currently mocking up C5 Corvette manifolds for they are cheap, they fit, and they will look good for the emissions tester so I can drive it on the street) I could put a lot of that towards a turbo which will give a lot more power than a good set of headers will. Don't know if I want to step into the turbo world though just yet for I don't think I have the pocket book for it.
If a person were to go with a turbo set up are there cams that a person should be looking into that cater well towards forced induction on a LS1?
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Turbo + stock heads >> usualy reverse split (224/220)
Tubo with ported heads >> simetrical (no split) (224/224)
Should have negative overlap and right VEs to prevent bleeding off (usualy slightly intake biased from TDC <~2*> and kinda late EVO <to delay trq output in band>, since turbos make power when spooling and that requires rpm)
I thought you might put a LS1 in your TA
This is what I would do if it was my Hybrid:
LS6 shortblock, AFR 205s (milled .030), 223/227 114+1 or +2 (LSK lobed), matching components, custom headers (long), ported 90/90.
That would truely be about as ALL AROUND as you can get in that light mobile.
You could drag, drift, Autox, shoot; take it on a Sunday cruise if you like.
Properly setup and tuned that combo is worth 450+++rwhp (can hit 480+ if you do it all the way)
Tubo with ported heads >> simetrical (no split) (224/224)
Should have negative overlap and right VEs to prevent bleeding off (usualy slightly intake biased from TDC <~2*> and kinda late EVO <to delay trq output in band>, since turbos make power when spooling and that requires rpm)
I thought you might put a LS1 in your TA
This is what I would do if it was my Hybrid:
LS6 shortblock, AFR 205s (milled .030), 223/227 114+1 or +2 (LSK lobed), matching components, custom headers (long), ported 90/90.
That would truely be about as ALL AROUND as you can get in that light mobile.
You could drag, drift, Autox, shoot; take it on a Sunday cruise if you like.
Properly setup and tuned that combo is worth 450+++rwhp (can hit 480+ if you do it all the way)
Last edited by PREDATOR-Z; Oct 29, 2006 at 12:00 PM.
Originally Posted by Ted J
THe G5X3 and G5X4, I've seen them when I'm reading around, are they known to be a midrange and upper end puller like the T-rex is?
I would say that on 100 stock heads the t rex pulls harder. bt, if you mill stock heads 20 thousanths and notch your pustons (to get your dcr up a little) I think the x4 would pull harder.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo True. The Trex I saw put down 450hp had heads milled something like .070". They were CUT. He had forged pistons with huge valve reliefs to compensate. But my point is that even with some crazy high compression the cam just wasn't making much torque. Although what it was making was holding out for a long time.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Originally Posted by N4cer
True. The Trex I saw put down 450hp had heads milled something like .070". They were CUT. He had forged pistons with huge valve reliefs to compensate. But my point is that even with some crazy high compression the cam just wasn't making much torque. Although what it was making was holding out for a long time.
> Intake not alligning
> Loosing flow dramatically
for exemple
Also:
T-Rex with Forged 347 would only need 58cc chamber, .040 gasket, .01 pistons out of hole and 4cc valve reliefs for a 11.43 SCR and 8.58 DCR.
A .070 mill doesn't make sense, unless he took a 6.0 head and milled 14cc to get 58 cc, which still indicates this guy doesn't know what he is doing
Bottom line folks, T-Rex is a drag cam and a good one properly setup.
Um, yeah. That's what I'm saying. You hit the nail on the head, Predator-Z. He didn't know they were milled until he got them. It was one of those deals where the heads were so cheap it was worth a shot. And he DID INDEED have intake problems... had to egg out the holes in the intake to get them to line up. And the loss of flow would explain the poor torque numbers too.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Originally Posted by SSilverSSurfer
i think im gonna do it PREDATOR, i'll even name it after you...do you think the 3800 stall will be enuff? flycut on stock heads? how much?
Like i said, even Thunder advises to measure PTV on stock heads to make sure. If you see various T-Rex cam cards, they are not all the same comming from the grinder. Little variations.
I strongly recommend Morel lifters and PRC Platinum springs; stock rockers will work but adjustable rockers will allow preload tuning. So if the heads are off, some milling and flycut can be done.
Ideally for a stronger setup, Stage 1 (stock valved or 2.02) PRC 243 ported heads would shine.
Guys just be aware that at these duration this is a max effort setup and not for the faint of heart, do it right or avoid it is my advice.
The "M" cam
"Megasaurus cam" 
Originally Posted by PREDATOR-Z
3800 stall will work but for max track performance a 4400>4800 would be better.
Like i said, even Thunder advises to measure PTV on stock heads to make sure. If you see various T-Rex cam cards, they are not all the same comming from the grinder. Little variations.
I strongly recommend Morel lifters and PRC Platinum springs; stock rockers will work but adjustable rockers will allow preload tuning. So if the heads are off, some milling and flycut can be done.
Ideally for a stronger setup, Stage 1 (stock valved or 2.02) PRC 243 ported heads would shine.
Guys just be aware that at these duration this is a max effort setup and not for the faint of heart, do it right or avoid it is my advice.
The "M" cam "Megasaurus cam"
Like i said, even Thunder advises to measure PTV on stock heads to make sure. If you see various T-Rex cam cards, they are not all the same comming from the grinder. Little variations.
I strongly recommend Morel lifters and PRC Platinum springs; stock rockers will work but adjustable rockers will allow preload tuning. So if the heads are off, some milling and flycut can be done.
Ideally for a stronger setup, Stage 1 (stock valved or 2.02) PRC 243 ported heads would shine.
Guys just be aware that at these duration this is a max effort setup and not for the faint of heart, do it right or avoid it is my advice.
The "M" cam
"Megasaurus cam"
how much should the heads be milled? Last edited by SSilverSSurfer; Oct 30, 2006 at 09:55 PM.
How about the FM15 cam from Futural? I saw a video of a Firehawk with the FM15 in it messing around and that cam seemed like it offered a nice midrange and upper end pull for that car.
