FMS cam and Patriot LS6 style heads. 474rwhp 421rwtq
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Sorry that I'm just getting to chime in here on this one. I went to bed early last night!! Ok, I'll try and answer a little bit of everything here.
1. On the 474rwhp run the belt was off the car.
2. Along with changing the cams, I also added a ported TB, electric WP, new patriot gold dual springs, and had a few "touch ups" done to the heads. By that I mean a new valve job since the heads had so many miles on them.
3. The idle and driveablity of this cam is better than the TSP cam, BUT it does have more aggressive ramps.
4. In my opinion, with the new mods, there is very little power difference between the TSP and FMS cams. The FMS may make a touch more midrange. I wish I wouldn't have sold the 231/237 yet, so I could have stuck it in and done a better comparison.
5. The reason I don't take my car to the track is because I don't want to put a 12 bolt in it right now. And this is the car I drive to work every day. I have taken it once last year and it ran a 11.98 @ 123 on a 2.2 60ft time. With street tires and 3.42 gears.
6. The Full cam specs are 230/232 .591/.585 112+2 which is a FM13
In conclusion, my final goal is a "homemade" 500rwhp car. To get there I feel like I am going to have to upgrade injectors, buy an LSx intake and stick one of the Texas Speed Magic cams in there. I'll be getting injectors next week, a new cam in two weeks and we'll see where it is at on the stock intake.
1. On the 474rwhp run the belt was off the car.
2. Along with changing the cams, I also added a ported TB, electric WP, new patriot gold dual springs, and had a few "touch ups" done to the heads. By that I mean a new valve job since the heads had so many miles on them.
3. The idle and driveablity of this cam is better than the TSP cam, BUT it does have more aggressive ramps.
4. In my opinion, with the new mods, there is very little power difference between the TSP and FMS cams. The FMS may make a touch more midrange. I wish I wouldn't have sold the 231/237 yet, so I could have stuck it in and done a better comparison.
5. The reason I don't take my car to the track is because I don't want to put a 12 bolt in it right now. And this is the car I drive to work every day. I have taken it once last year and it ran a 11.98 @ 123 on a 2.2 60ft time. With street tires and 3.42 gears.
6. The Full cam specs are 230/232 .591/.585 112+2 which is a FM13
In conclusion, my final goal is a "homemade" 500rwhp car. To get there I feel like I am going to have to upgrade injectors, buy an LSx intake and stick one of the Texas Speed Magic cams in there. I'll be getting injectors next week, a new cam in two weeks and we'll see where it is at on the stock intake.
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Originally Posted by offaxis
Hey Gomer
Was your old 451 rwhp done with the belt off also ?
Im just trying to get a acurate view of the gains.
Thanks
Was your old 451 rwhp done with the belt off also ?
Im just trying to get a acurate view of the gains.
Thanks
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Originally Posted by gomer
No, the old 451 was with a stock wp, crappily ported TB and full belts, not even a short belt. I think the 231/237 would be right there with this with the newer mods.
Thanks
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I was at a dyno day and only got 3 pulls, the first one was with the belt on and it was 459rwhp and 417rwtq... but that was the first time the car had been taken to WOT since I had gotten it all put together earlier that morning, heck the springs hadn't even been heat cycled.. I started it up, checked for leaks and drove down there. Each pull was getting higher.. wish I would have had two or three more pulls. It has about 150 miles on it total now and is feeling stronger. I may dyno it again next weekend before I start changing stuff again.
btw, removing the belt is worth 10rwhp in my opinion. I think the car would have done 465rwhp with the belt on it if I would have had more pulls.
btw, removing the belt is worth 10rwhp in my opinion. I think the car would have done 465rwhp with the belt on it if I would have had more pulls.
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Congrats on your progress! I would be interested to see what difference bigger injectors would make on your current setup. I think that would be useful info. You will get to 500, keep up the good work.
Good luck!
Good luck!
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I've had a load of people PMing me asking me if these are the "race port" heads. They are not, they are an off the shelf CNC'd Stage II LS6 STYLE head. All the tool marks are in the head, no hand finishing on them. When I pull the heads to flycut
I'll send them for the "race port" upgrade... if the cost isn't too much
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Originally Posted by Haans249
Digging up this old post......where there any updates to this?!