NVE THIS

iTrader: (1)

With my mods in the sig, and an upgraded N20 shot for next season (150 HP, TNT Wet) which will give me better results?

Thunder Racing 224/224 .561/.561 112
-----or-----
Thunder Racing 228/228 .571/.571 112

I'm not sure if I should go with a split duration setup or a single pattern like stated above? If one of those cams listed above will give me good power (I'm hoping for 400 HP N/A) then I may cut back on the N20 use to only get me into the 10's <img src="gr_grin.gif" border="0">

Does anyone have any good ideas on a split duration setup that would work with my mods to give me both good N/A and N20 times/power gains.

I know that a 228 cam might be a bit large/aggressive for the stock heads, but I plan on upgrading to StageII or pissibly even StageIII eventually, and also forging the bottom end. I think I can get by for a while with drilling the throttle blade, and eventually using LS1edit to do computer programming. Might send PCM to MMS for custom Budget tuning for now. Thanks.

[ December 24, 2001: Message edited by: NVE THIS ]</p>

Nine Ball

iTrader: (38)

I would NOT go over 224 intake duration for a 346ci LS1 motor. All you will get is worse drivability and no additional performance most likely. Stick with cams between 221-224 intake durations on these stock displacement motors and you will find the best overall performance.

As for split duration cams and nitrous use, I wouldn't worry about tailoring a cam for nitrous until you are spraying over 200 rwhp worth of nitrous. Until then, just stick with making the car run stronger NA and consider the nitrous a bonus. It isn't picky about the motor, and it's easy to jet up.

Out of those two cams, gotta pick the 224/224

Tony

NVE THIS

iTrader: (1)

Tony,
Somehow I was hoping that you would reply. More than 200rwhp with N20 huh?
Let me throw this out there and see what you think. I dynoed my car recently and it was quite dissapointing, N/A wise anyway. With all the mods in the sig. I pulled a max of 308 RWHP/323 RWTQ on the first run, and 314 RWHP/330 RWTQ on the second run. I wanted to do a N20 run. I had the 100HP jets in and 600psi in the bottle. On the final dyno I pulled 436 RWHP/480 RWTQ. <img src="gr_eek2.gif" border="0">
I'm not sure how to explain it <img src="images/icons/confused.gif" border="0">
I am installing my ARE intank pump and going to run the 150HP jets. This is on a TNT Wet setup.
Would I still be able to go with the TR224 setup and see good results? Will I make 400 RWHP if I go with that cam? Will I make it with the TR228 cam, and sacrafice some drivaility or whatever? What do you think? Any split duration specs. you think I would bebefit from, or should I stick with a single pattern? Thanks.

Nine Ball

iTrader: (38)

First of all, get the "Bigger is Better" idea out of your head when you are discussing cams. There is definitely a law of diminishing returns when it comes to cams. Picture a smooth mountain representing camshaft performance of various cams, and you will find the top performers (top of this mountain) for 346ci LS1 motors typically have between 221-224 intake duration. If you go too small, you get less performance but better drivability, but if you go too big you get shitty drivability and less performance. Bigger is NOT better. I'd rather be under-cammed if I were to settle for less performance.

Screw dyno numbers. Go to the track or race against other cars. Also keep in mind that your 12-bolt AND the 3.73 gears are dyno-hp hogs and probably cost you about 15 rwhp vs stock rear/3.42 gears. Maybe even more. I'll also bet you still run the 17x9 WS6 wheels, which also are heavier than 16x8 rims and skew your dyno numbers.

Pick any cam you want. But no greater than 224 intake duration, until you add a stroker. Just my opinion based on experience. Stick with 112-114 LSA also, and lift doesn't really matter. Just make sure you get the right springs that can handle the lift, and don't get too crazy with lift on stock pistons. Piston/valve contact IS an issue. 0.560" lift is plenty for stock heads and stock pistons.

Tony

Nine Ball

iTrader: (38)

By the way, we are trying to maintain a 5-line total signature limit on this site. Long signatures **** alot of people off. I understand that you wanted all of your mods known for this thread though. Once you get that many mods, you should start looking to make a webpage <img src="gr_grin.gif" border="0">

Tony

NVE THIS

iTrader: (1)

Tony,
Thanks for the help. I agree with you that dyno numbers mean absolutely $hit. I posted them to give you an idea of how the N20 was working with my car. I really don't care what my dyno numbers are, just that I run ***** to the wall at the track <img src="gr_grin.gif" border="0"> and can pull times that keep pushing me to the limits. I have broken things on my car, and I am willing to break things in the future (just not to many, please) and that is the love of racing I have.

With all that said, I think that I am going to go with the Thunder Racing 224 cam. I'm still thinking, but I'll probably give that one a try. I understand the whole bigger is not always better thing now that you put it into perspective. My inexperience in internal engine mods is showing throught the surface <img src="images/icons/rolleyes.gif" border="0"> but that is what I like about these BB's. There are a lot of people who have done it, and know their $hit, and are willing to lend a helping hand when someone else is ready to jump into the workd of un-ending mods.
Just look at me. I bought this car in June of this year after I wrecked my '98 Trans AM. I have racked up 17,800 miles on it already and spent about $15,000-$18,000 (I don't want to know exact total <img src="gr_eek2.gif" border="0"> ) on mods already. The $2,800 Multimedia System didn't help any, but I needed something entertaining.
I remember you when I bougt my '98 2 years ago on LS1.com. I've learned a lot from you and from all the other people on these types of BB's and the wealth of information out there. Thanks for your hard work, and sharing your knowledge.

P.S. I'll fix the signature thing. I have a lot of stuff to list, I know. I haven't had the time to put it all on a web page yet. But yes, I did want all that info in this post.

Bryan
2001 Trans AM WS6 (TNT Style)

Nine Ball

iTrader: (38)

I think you will be happy with your cam selection. I try my best to help educate others enough to make their own decisions. It would be too easy for me to tell you to buy a specific cam, and more valuable for you if I help you learn what the different specs to towards performance.

Thanks for the kind words, compliments definitely keep me motivated to help others out.

Tony