T rex
09-29-2006, 12:06 AM
#21
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Originally Posted by 300bhp/ton
Not being nasty at all but I think it would help you understand it a little better if you did a little research on what gearing is and it's affects.
In breif, Imagine trying to pull away in 3rd gear each and every time? You can add more revs but because more effort is required it will be a pain and slower compared to pulling away in 1st.
Changing the final drive ratio just allows the engine to rev thru its rpms range easier, and because of the shorter gearing means you will drive at higher rpms thsu using the operational range of the cam.
Stock engines are very happy 1500-5500rpm with a Trex it will prefer 3500-7000+rpm if you are outside this rpm range the cam will not generally be happy.
In breif, Imagine trying to pull away in 3rd gear each and every time? You can add more revs but because more effort is required it will be a pain and slower compared to pulling away in 1st.
Changing the final drive ratio just allows the engine to rev thru its rpms range easier, and because of the shorter gearing means you will drive at higher rpms thsu using the operational range of the cam.
Stock engines are very happy 1500-5500rpm with a Trex it will prefer 3500-7000+rpm if you are outside this rpm range the cam will not generally be happy.
I want a cam that has similar power down low as a stock cam would, but I want to have a higher as well as higher powerband. I dont wanna go past 6600 RPM.
SO many cams, so many decisions.
09-29-2006, 12:12 AM
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Originally Posted by orangeapeel
You have a stock 347?
I just want a cam to make more power over the 224/224 by TR but keep my stock 3.42 rear ( maybe uppgrade to 3.55 when I get a ford 9') and also keep my stock cubes ( unless I rebuild a stoker motor) which when I do what stroke can I put with my stock 3.90 "?
09-29-2006, 03:05 AM
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Originally Posted by DanZ28
How did you get 347? Your close, but stock is 346 and a .005" over bore would put you at 347". 
Dan
Dan
Ok stock LS1 346 ci 5.665 liters
lol
09-29-2006, 03:17 AM
#25
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Originally Posted by LSGunZ28
No offense taken. I know what gearing is and what it affects, butr thats why I can downshift. Just on takeoff its a pain. the problem is I drive in traffic a couple times a week and it may be a pain.
I want a cam that has similar power down low as a stock cam would, but I want to have a higher as well as higher powerband. I dont wanna go past 6600 RPM.
SO many cams, so many decisions.
I want a cam that has similar power down low as a stock cam would, but I want to have a higher as well as higher powerband. I dont wanna go past 6600 RPM.
SO many cams, so many decisions.
A setup that seemed to work well as the TSP Torquer V3 cam and there new Terminator heads. There's a dyno in the dyno forum where an auto was putting down 430rwhp with such a setup. A cam only Trex under most conditions won't produce any higher PEAK. But because the V3 is a milder cam and cobined with the heads it makes great power across the entire rpm range. It's also not that expensive.
02-05-2007, 11:12 AM
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This thread is a little old but I will contribute. I run the T-rex and found that my mid and bottom is actually great. And the power peaks at 6300 which all this is oposite of what I read prior to buying the cam. I built a rear for the cam with 4.56 gears thinking I was going to have to rev the pis out of it to make power. The thing would just blow the tires off the car through 3rd and only be going about 80 once I hit 4th with a 26" tire. That sucked. Flet like over 100 due to all the shifting in short time. So I am going to try a 4.11 this year with 26" tires and see how she does.
02-05-2007, 01:22 PM
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I to run the TRex and it definately does not have the bottem end my TR230 had as my overlay I posted up a couple years ago showed, but for me I really don't give a $hit about bottem end. I race my car and the TRex is a cam built for racing and I wouldn't switch it for anything but a solid roller setup. If you want a cam for traffic and stop light to stop light DD, this cam isn't the right choice IMO unless you just want that big lopey cam.
Dan
Dan