I am at work and cannot download a DYNO graph I just had emailed to me concerning a setup near my own. Can I email this to someone and have you post the link in this thread?
Thanx...Brad

 

email it to me and I will post it for you if you like.Since it is the same cam I am putting in my car FUNINA91SS@AOL.COM

 

Sent the email...thanx man

 

224/230 dyno

kmook's dyno

 

Max HP-374.4
Max TQ-382.1

I've been reviewing this DYNO graph next to Kmook's 230/236/112LSA DYNO graph. Both cars have very similier bolt on's and flow numbers in the heads I beleive. I am now second guessing myself purchasing the 224/230/112 as the torque seems to drop off quickly around 5K. The torque curve is the reason I purchased this cam as compaired to the 230/236/112. Kmooks graph looks much better even though the torque doesn't peak as high, it would seem like a better cam to rev to the 6100rpms I originally had planned on. Anyone else have an opinion on the 2?

 

email me that one too I will post it so we can get a side by side look

 

I think your a little off base. That 224 cam should be shifted around 6500. I don't think it really dropped off that hard at 6300, i think somebody let off the gas too soon. Yes i am looking at the same graph.

If you give me the actaul HP numbers for each RPM i can show you the optimal shift point. For now look at my graph and tell me where you think you would shift. http://www.personal.psu.edu/users/b/...dyno/DYNO3.jpg

THEN look at this avg HP calculation

http://www.personal.psu.edu/users/b/...alculators.xls

 

In the original (224/230) graph it looks as if they let off the gas at 6200 most likely because of the rev limiter. The power was falling off pretty quickly well before that though (around 5800rpm). By guesstimating the curve looks as if had it been revved to 6500 it would have ended up at about 330HP and 280TQ. To me (and beleive me I'm no expert) it looks as if the optimal shift point would be around 5800rp and taking it that high would slow the car more than accelerate it.

 

What are the flow characteristics of the heads being used in the dyno. What's the exhaust setup also?

 

the rev limiter may have been a factor, however that can be moved up to 7000k. WIth that cam and power they must have an aftermarket tune.

Shifting at 5800 is going to take you back to 4100 rpms where you only make ~290 hp. So your going from 290-374 and have approx 340 average HP through that gear. If you shift at 6500 you are ranging from about 330-374-330 and your average HP will be ~ 350 through that gear. i don't have the actual numbers so those aren't exact, but....

Try playing with the excell spreadsheet i posted above. It's not based on the same graph but you can see what shifting too early does to your avg hp.

 

And yes your right, the cars 'jerk' or rate of accelleration will actually slow down from 5800-6500, but it will still be accellerating. The acceleration in this range will still be greater than it's accelleration from 4000(~290 hp)-4500 .4500 being ~ where you would have picked up after the shift if you would have ridden the previous gear out to 6500.

 

Ahhhh..I see. I suppose you can't be in peak power all the time. What your saying makes alot of sense. Thanx...

Also from what I understand both of these cars are full exaust, heads ported (Kmooks may flow better) and a M6.

 

Nice Dyno I just ordered that cam.. got any soundclips ?

 

You dont want to shift at 6500rpm with the 224 cam based on that dyno graph. I run faster when shifting about 200rpm passed peak hp. At 6500rpm your lucky to have 250rwhp the way it fell off. I wouldnt shift below 350rwhp, but even that is spinning way past peak. Peak looks to be at 5750rpm, so I would realy shift at 6k-6.1k!

 

This isn't my DYNO just to be clear, my heads aren't done yet so no soundclips, sorry. It's the only graph I could find (and it took forever) so I wanted everyone to see it. Alot of people are ordering this camset thru Seth at CM and for good reason.

Shifting at 6000-6100 is exactly what I wanted With 3.42 gears and a M6 I want to end the 1/4 at the top of 3rd (appx 110-115 mph trap) not bad for a N/A 350.

Brad