fm13 versus Trex...
fm13 versus Trex... Hey guys. I have the fm13 right now with hardened pushrods, tit retainers, double springs..
I put down 370 through cats, mid length headers, gmmg, 4.10 gears and 18 inch rims and a bad idle sensor.
I want MORE power though. I went with qtp long tubes, true duals.
How much do you think the TREX would give me over my current setup?
Do I have to do anything else or could I just swap in the cam and leave all other parts alone?
I put down 370 through cats, mid length headers, gmmg, 4.10 gears and 18 inch rims and a bad idle sensor.
I want MORE power though. I went with qtp long tubes, true duals.
How much do you think the TREX would give me over my current setup?
Do I have to do anything else or could I just swap in the cam and leave all other parts alone?
The F13 is a badass cam, and you should be able to make more power than that. I wouldn't go to a Trex though, you need to be spinning up to 7 grand to truely take advantage of it, and while it is one of the most dominating cams on the market, I think your best bet is to get a nice set of heads, if your on a budget ported LS6 heads are great, and if you have money to spend go with ET performance heads.
As a comparison, a local guy made 400.5 with the f13, bolt ons, and a good tune though an M6, added heads I wanna say its making 440ish now, but I don't know the exact number.
As a comparison, a local guy made 400.5 with the f13, bolt ons, and a good tune though an M6, added heads I wanna say its making 440ish now, but I don't know the exact number.
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You do NOT have to spin to 7k rpms to get the full use of the TRex. So many people on this board hear that in a post with no evidence to back it up and then regurgitate it in every TRex thread on this board.
The TRex PEAKS around 6200rpms and CARRIES IT THROUGH to 7k RPMS, but the power does drop off some by then. You could probably see some more power out of your current setup with some more mods and tuning. However, if you are wanting a MAX effort cam setup, the TRex would be good.
The mods you listed would work fine. You would want an LS6 oil pump (you don't really need a ported one), and an LS2 timing chain. Lifters wouldn't be a bad idea but aren't necessary. The TRex cam has disappointed some people who didn't have all the supporting mods and then threw it on expecting to see 450rwhp. However, with the right mods 430rwhp is totally possible.
I think if you got a different set of rims, had full bolt ons, did the TRex cam and had a good tune you would see low 11s all day long with some sticky tires. However, you could still see some good numbers with the F13 and keep a lot of daily driving mannerisms with the right setup. Good luck and ignore the TRex misinformers out there!
The TRex PEAKS around 6200rpms and CARRIES IT THROUGH to 7k RPMS, but the power does drop off some by then. You could probably see some more power out of your current setup with some more mods and tuning. However, if you are wanting a MAX effort cam setup, the TRex would be good.
The mods you listed would work fine. You would want an LS6 oil pump (you don't really need a ported one), and an LS2 timing chain. Lifters wouldn't be a bad idea but aren't necessary. The TRex cam has disappointed some people who didn't have all the supporting mods and then threw it on expecting to see 450rwhp. However, with the right mods 430rwhp is totally possible.
I think if you got a different set of rims, had full bolt ons, did the TRex cam and had a good tune you would see low 11s all day long with some sticky tires. However, you could still see some good numbers with the F13 and keep a lot of daily driving mannerisms with the right setup. Good luck and ignore the TRex misinformers out there!
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Originally Posted by SVT THIS
You do NOT have to spin to 7k rpms to get the full use of the TRex. So many people on this board hear that in a post with no evidence to back it up and then regurgitate it in every TRex thread on this board.
The TRex PEAKS around 6200rpms and CARRIES IT THROUGH to 7k RPMS
The TRex PEAKS around 6200rpms and CARRIES IT THROUGH to 7k RPMS
Sorry Jperran, I misread your post. I thought you were saying you didn't see its power up to 7k rpms. Yes, to take full advantage you should spin to 7k rpms. However, he doesn't have to spin to 7000 rpms to still see a lot of power. He could stop it at 6500-6800 and still see plenty. With the 4.10 gears he would stay in the powerband most of the time. I also don't see where in his post he said he didn't want to spin all the way through the TRex's powerband. Maybe I'm missing something.
Before switching cams, I think he should try to max out his current cam setup. If he is still unhappy, then he should change cams. The F13 would definately have more street manners than the Trex. He said he wanted more power though, and maxxing out his current setup would probably net him around 15-20rwhp since he seems to have most of the bolt ons. 15rwhp is not really enough to satisfy a "hp craving" to me. Who knows, maybe that will be enough for ya though.
If you do decide to do the TRex cam, enjoy the F13 cam for a while and do some research on the proper supporting valvetrain mods for the 'Rex so you can take advantage of the cams powerband SAFELY. You will want to do some new lifters just to be on the safe side. And like I mentioned, an oil pump and timing chain upgrade would be in order.
Post up your numbers with the LTs and true duals, I'd like to see what you put down!
Before switching cams, I think he should try to max out his current cam setup. If he is still unhappy, then he should change cams. The F13 would definately have more street manners than the Trex. He said he wanted more power though, and maxxing out his current setup would probably net him around 15-20rwhp since he seems to have most of the bolt ons. 15rwhp is not really enough to satisfy a "hp craving" to me. Who knows, maybe that will be enough for ya though.
If you do decide to do the TRex cam, enjoy the F13 cam for a while and do some research on the proper supporting valvetrain mods for the 'Rex so you can take advantage of the cams powerband SAFELY. You will want to do some new lifters just to be on the safe side. And like I mentioned, an oil pump and timing chain upgrade would be in order.
Post up your numbers with the LTs and true duals, I'd like to see what you put down!
Originally Posted by SVT THIS
Before switching cams, I think he should try to max out his current cam setup. If he is still unhappy, then he should change cams. The F13 would definately have more street manners than the Trex. He said he wanted more power though, and maxxing out his current setup would probably net him around 15-20rwhp since he seems to have most of the bolt ons. 15rwhp is not really enough to satisfy a "hp craving" to me. Who knows, maybe that will be enough for ya though.
If you do decide to do the TRex cam, enjoy the F13 cam for a while and do some research on the proper supporting valvetrain mods for the 'Rex so you can take advantage of the cams powerband SAFELY. You will want to do some new lifters just to be on the safe side. And like I mentioned, an oil pump and timing chain upgrade would be in order.
If you do decide to do the TRex cam, enjoy the F13 cam for a while and do some research on the proper supporting valvetrain mods for the 'Rex so you can take advantage of the cams powerband SAFELY. You will want to do some new lifters just to be on the safe side. And like I mentioned, an oil pump and timing chain upgrade would be in order.
Originally Posted by Wyckedcamaro
Hey guys. I have the fm13 right now with hardened pushrods, tit retainers, double springs..
I put down 370 through cats, mid length headers, gmmg, 4.10 gears and 18 inch rims and a bad idle sensor.
I want MORE power though. I went with qtp long tubes, true duals.
How much do you think the TREX would give me over my current setup?
Do I have to do anything else or could I just swap in the cam and leave all other parts alone?
I put down 370 through cats, mid length headers, gmmg, 4.10 gears and 18 inch rims and a bad idle sensor.
I want MORE power though. I went with qtp long tubes, true duals.
How much do you think the TREX would give me over my current setup?
Do I have to do anything else or could I just swap in the cam and leave all other parts alone?
Hey guys.. great stuff. I really REALLy appreciate all your advice!
As for my cam putting low numbers down.. yeah I was really dissapointed but I had gotten this cam on the group purchase and people seem to have gotten a bad batch on the grinds.
I guess I am one of them as well
I mean, 370 isnt much to sneeze at due to the lack of supporting exhaling mods (mid lengths, cats, catback) and stock pulley through 4.10's and 18 inch rims with a bad idle sensor and my car was throwing codes do to my third gear being BLOWN TO SMITHERINES. lol
So the idle sensor is fixed, I have an ASP underdrive crank pulley, qtp long tubes with hvcm, true dual 2.5 inch mandrel bent with 4 bullets and over the axels, new TURNONE power steering pump (not saying thats a performance mod but its a mod lol) and KONI SA's 4x4 all around (should help my torque numbers due to the fact I had stock shocks, not even bilsteins and DMS springs at the time and I only netted 351rwtq )
Anyways.. thanks for the input. I will max this setup and see what it does. If I dont hit 400 this time around.. the cam is coming out.
Appreciate it.
As for my cam putting low numbers down.. yeah I was really dissapointed but I had gotten this cam on the group purchase and people seem to have gotten a bad batch on the grinds.
I guess I am one of them as well
I mean, 370 isnt much to sneeze at due to the lack of supporting exhaling mods (mid lengths, cats, catback) and stock pulley through 4.10's and 18 inch rims with a bad idle sensor and my car was throwing codes do to my third gear being BLOWN TO SMITHERINES. lol
So the idle sensor is fixed, I have an ASP underdrive crank pulley, qtp long tubes with hvcm, true dual 2.5 inch mandrel bent with 4 bullets and over the axels, new TURNONE power steering pump (not saying thats a performance mod but its a mod lol) and KONI SA's 4x4 all around (should help my torque numbers due to the fact I had stock shocks, not even bilsteins and DMS springs at the time and I only netted 351rwtq
)Anyways.. thanks for the input. I will max this setup and see what it does. If I dont hit 400 this time around.. the cam is coming out.
Appreciate it.
Originally Posted by 300bhp/ton
What have shocks got to do with making torque???? 
I was wondering the same thing.
I made 400rwhp on a safe street tune with a slipping clutch and stock rims with the F13. After the new clutch goes in, I'll be redyno'ing it to see how it does. Then I'll probably throw some PRC Stg2 LS6 heads and hope for 430+.
My Trex peaked at 6700-6800 rpm and carried without dropping to 7000 rpm. The powerband for me was 5500 to 7000 rpm, thats were it liked to be at. The Trex is pretty soft below 3500 rpm and the F13 will work much better in that range. For better street manners, good bottom end and all around good cam, stay with the F13. If you like to drag race where you stay in the upper power band, the Trex is awesome.
Dan
Dan