<div class="FTQUOTE"><begin quote>Originally posted by: lt230sman

So, let me get this straight, I should:



- Send my cylinder to FST and have them do the big bore.</end quote></div>

If you want 30cc's worth more power.

<div class="FTQUOTE"><begin quote>- Get a LT250S Head</end quote></div>

Definitely. The 250 is a better cam too. Read my post in the big thread.

<div class="FTQUOTE"><begin quote>- Get a Megacycle Stage 1 Billet Cam</end quote></div>

I don't know. If you want billet, I guess megacycle is the only choice. I don't think webcams does billet do they?

<div class="FTQUOTE"><begin quote>- Get upgraded valve springs & retainer.</end quote></div>

Definitely.

<div class="FTQUOTE"><begin quote>Am I missing anything?</end quote></div>

I don't know. Maybe just get the whole 250 engine and then get a 270 kit? [img]i/expressions/face-icon-small-happy.gif[/img]

<div class="FTQUOTE"><begin quote>Thanks alot man. </end quote></div>

No problem! [img]i/expressions/beer.gif[/img]

 

insted of listing to speculaton from members i have "real" info. i have used all the megacycle and webcams. 1st question is where do you want the power? if you want crazy midrange and upper rpm power the #213 webcam is by far better then the 393-00 from megacycle. the 393-00 make great torque and lowend power but gets killed up top by the #213 webcam.(allmost a 2hp gain from the 2) i have the #214 webcam also but will not be testing it till this weekend. the #214 is basicly the same as the #213 but another 1.7mm of lift and a tad more duration, basicly should act very similar to the the #213 but make more hp and torque. remember lift is what makes hp an torque and duration tells you what rpm the powers at.

 

well, i'm going for as much torque and low end as possible, but I dont want to lose any mid or top end power.

what do you suggest?

 

<div class="FTQUOTE"><begin quote>Originally posted by: HACKMUNCH

insted of listing to speculaton from members i have "real" info.</end quote></div>

Well good! Too bad its for the wrong engine, lol. Each engine is different and if you think your 190cc, 70x49mm bore n stroke engine is even remotely similar to the 66x67mm 230 engine you need to think again. Doesn't matter if it takes the same cams or not.

<div class="FTQUOTE"><begin quote> i have used all the megacycle and webcams. 1st question is where do you want the power? if you want crazy midrange and upper rpm power the #213 webcam is by far better then the 393-00 from megacycle. the 393-00 make great torque and lowend power but gets killed up top by the #213 webcam.(allmost a 2hp gain from the 2) i have the #214 webcam also but will not be testing it till this weekend. the #214 is basicly the same as the #213 but another 1.7mm of lift and a tad more duration, basicly should act very similar to the the #213 but make more hp and torque. remember lift is what makes hp an torque and duration tells you what rpm the powers at. </end quote></div>

If you call Vince http://vincescycle.tripod.com/newparts/lt230s.html , he'll tell you any lift over .280 is too much. It simply doesn't flow any more air. So, max lift is irrelevant on both cams.

Another point you failed to consider is the ramp-rate (a closely guarded secret by megacycle and webcams... Just try to pry the info out of them once). How fast does the valve open on each cam? As far as I can tell, the megacycle has a higher ramp-rate (hence the higher lift), therefore the valve is opens a larger amount sooner and stays open a larger amount for longer. The drawback is increased rocker and cam lobe wear.

Ramp-rate is the single most important aspect to cam design. Why do you think roller-followers are so great? The cam can be ground with near instant valve openings! A cam with a high ramp-rate and somewhat lower duration will womp all over a cam with a somewhat higher duration and lower ramp-rate at any rpm... Unless the 2 have greatly differing overlaps.

Webcams "may" make more power on the topend because of increased overlap more than anything else, but you can't go around saying since it made more power for a short-stroked 190cc engine, it will make more power on a long-stroke 230 engine.... Unless you have a 230 hidden around somewhere that you haven't owned-up to on the 230-help-thread in the last year or so. And if you do, why do you keep posting about the 190 in the 230 thread?

 

<div class="FTQUOTE"><begin quote>Originally posted by: lt230sman

well, i'm going for as much torque and low end as possible, but I dont want to lose any mid or top end power.



what do you suggest?</end quote></div>

If you want to do that, I suggest you get the 250S cam. http://www.alpha-sports.com/satv/1990/LT250S/03.htm

Its cheaper, you get more topend and mid, but don't sacrifice the bottomend relative to the 230 cam. Plus, you don't have to worry about core-charges or sending you cam in or worrying about buying new rockers because the cam has been hard-welded.

If you want as much bottomend as possible (and I can't see why), you can't do it with cams unless you give up a lot of topend. For the best bottomend, get the 250 LT4WD cam. http://www.alpha-sports.com/satv/1990/LT4WD/05.htm You'll lose so much topend though, you'll hate it.

 

thanks for the help man, hahaha i was just thinking how ridiculous an lt-4wd cam would be. my buddy has one and all i can remember is it is a whiplash machine lol.

unfortunatley, i'm so dam broke from building my 250r for the race season, i dont think im gonna be getting into the 230 for a good while.

 

*well, a whiplash machine at low speeds, that is

 

I have the 230, 250, and LT4WD cam. I changed from the 250 to the 230 cam and quickly decided I didn't like it, so I put the 250 cam back in... All in the same day if I remember right.

The 230 cam has just a hair more lowend, but not enough to offset the large increase of topend the 250 cam has. I figured the LT4WD was even worse, so I didn't even bother testing that one.