I said that, Randy. TQ is far more important than HP, because you spend more time powering out of turns than you do on long straights. Some courses are longer than others, but I actually have yet to use 3rd gear. I utilize my huge torque constantly, though.

 

Sorry, I didn't intend any "tone". It is hard to read people's intentions sometimes via print.

Were these cam combos tested on the same car, same day, same dyno? If not, then comparing 2 different cars with running different cams means nothing. Any diffference could be attributed to car-to-car variance. Also, I think in the context we are speaking about the meaning of "low-end spoolup" is the same thing as "low end torque".

I'm sorry, I thought you were the one that said your recommendation was just your opinion rather than fact. Maybe I misread your post. As far as I am concerned David Buschur disproved this "commonly-held belief" that you lose low end torque with big cams on the EVO when he tested the 280's. Heck, he went even bigger with the Revolvers (more lift, less duration) and made another 50ftlb of TQ. I don't know if DB posted the graphs of all those runs or not. If he did I think it was on his forum. He did like 400 dyno pulls on his car in a matter of 1 or 2 months testing. I know he lost a bunch in a computer crash, but if he still has them I am sure he would share it with you.

I did read every page of the thread and I even printed the entire thing to keep as a reference quide as to how much power each piece in his mod-path makes and what combo of supporting mods is necessary. If you have not read the whole thing I think it is something every EVO owner should read.

FWIW, I make full boost (21psi) well under 3000 rpms on the stock turbo with 280's.

EVOlutionary

 

I've tried stock, 264, 280 and I can tell you that there are differences in spool up between them FOR SURE! That's why companies offers different specs. I've been testing out some cams last few weeks. For autox, I personally won't go anything bigger than 264.

 

you could play with cam gears and get similar effects... the difference in durations are for people that don't wanna test cam gears, tho the overall durations sometimes make things better or worse depending on waht you're looking to do.

 

Clay, you said the it was obvious where the power curves criss cross was different with each cam. Are you talking about where the torque and hp curve cross at? Thats a 5252 constant, or so I thought. I'm assuming what you meant is where the peak trq and HP come in at and how flat the curves are, correct?

 

You have a boost vs. rpm log chart to back that claim up? Unless you stuck a T25 on your evo..

 

I make full boost on on my stock 9.8 before 3000rpm. But I also have a built head, oversized valves, pistons and rods

 

So do you also have a boost vs. rpm log chart to back that claim up? I'd be really interested in seeing it.

 

I'll have to dig out my last dyno graph. I was partially tuned at Mach V about a month ago. I can look around. I'm in the process of moving and then getting sent to Camp Lejeune. I'll see what I can't do.

 

he is talkin' about the overlayed graphs crossing each other because the 264 makes more power down low but then flattens out sooner up top (where the 272s will cross over the 264 map)

 

Ok thanks. I must have misread or misunderstood

 

Yea I would love to see it, I really want to know how you guys are getting your turbos to fully spool and hit full boost almost 1000rpm sooner then everyone else.

 

If I can't find it, I'll talk to Dan at Mach V to see if he can post it.
I think my biggest thing is my ported/polished head, larger valves and built bottom end. My pistons are slightly lower compression

 

I'll log one for you this weekend. Do you have AEMLOG to open the file and read it?

EVOlutionary

 

No, unless I can download it. You could post a screenshot as well.