BLU-BY-U

got the cam in last Friday. I would have posted earlier, but I had a business trip to Dallas, and just got back.

Well, a little background. The cars an 02 Z06, previously only mods were vararam, S2 TB, and magnaflow xpipe with the stock cats. Dyno'd 372rwhp/358rwtq SAE at MTI back on 1-4-03.

Last week, I had MTI install their X1 cam (230/227 dur, .591/.571 lift, 112 ls). I had no headwork, stock ls6 heads. I also had some stainless works headers installed, I kept the stock cats on with the magnaflow xpipe, and kept the stock catback. I also had a pulley installed.

It pulled 405rwhp/385rwtq SAE on the same dyno. I picked up peaks of 33rwhp and 27rwtq. I had the before/after dynos overlayed and it picked up around 35ft lbs from 3800-5000.

Overall, I'm pretty happy. I thought the results were darn good for running through the stock cats. MTI figured it would pull another 15hp/10tq at least with a bigger offroad setup exhaust. I was originally dead set against going catless, but I'm debating that now. The exhaust, even after the headers, is surprisingly quiet. Almost too quiet. I think the stock cats are choking off alot of power. Maybe the random tech midpipe is an option as well, not sure how much they might flow over the stock cats.

I ran out to the track Friday night and pulled over 98mph in the 1/8, and just under 120 in the 1/4. HRP had excellent cold air, but we were running into a headwind. It pulled damn hard on the track. I'm going to have to relearn the launch techinque all over again, the low-end tq is majorily improved. I was frying the 315/35 bfg's on the launch, the 1-2, and the 2-3 was even an adventure. My best et was 11.7 on a 1.88 60ft.

J-Rod

Nice numbers, can't wait to hear what it sounds like...

BLU-BY-U

thanks Jrod. It sounds nice and lopey.

I didn't get out there until 8:30pm. Forgot my tire guage, just guessed on psi. Hardly any drag tire cars by the time I got there, nothing but rice and trucks. It was cold, but terribly slick. I almost put it in the wall 1000ft down the track. Had to lift on one run.

I read about your 11.5! Congrats!

Gary Z

This is very interesting information but I would appreciate a bit more. Has anyone checked the PV clearance for this combination? I assume you are using the stock valve springs because you didn’t say otherwise; is this true?

TIA, Gary

LOnSLO

iTrader: (15)

Was waiting on your results. Great numbers. I assume MTI did the tune? I figured the numbers would be a little higher, but 405 is definitely nothing to sneeze at. Congrats <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

VINCE

iTrader: (1)

Awesome #'s.. Congrats!!!

beardWS6

iTrader: (1)

I love the X1 cam. MTI did all the work on mine! I`m hoping to go to the track this weekend and get some times. I`m hoping mid 11`s on motor and 10`s on spray. Check my sig for my numbers. I`m tuned really safe with timing and fuel! Did they give you a hard time without a cage! Let me know, thanks!

BLU-BY-U

I need to send my S2 TB back to Mark Shaner for a re-work. He thinks he can get it to idle better and squeeze a couple more hp since he originally had it designed for a stockish car.

I'll probably throw on either an offroad pipe or high flow cat pipe as well and get it redyno'd.

Nine Ball

iTrader: (38)

Uh oh Jeff, the engine modifications have begun. WARNING: Its addictive <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

Skip ported heads and just do an all-bore 382 with ported heads for the next level. Or just skip that and do a 427ci

They sell an X-pipe that replaces the factory cats, probably the path I'd go.

-Tony