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Old 01-08-2009, 01:04 PM   #1
wrxwhat
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Default Back to back Camshaft dyno plots??

Is there any no bull****, real information, regarding power pickup with camshafts in our engines?

If you have some back to back dyno plots or testimonials about your cams, please post them up.
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Old 01-08-2009, 05:29 PM   #2
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I'd love to find some concrete info but there really is no such thing as back to back when it comes to dynoing a car, pulling the motor to swap cams, then dynoing again. That's a lot of work and time in between just to compare numbers.

I changed to many things when I installed my cams so I can't attribute all my gains to just the cams.
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Old 01-08-2009, 05:59 PM   #3
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I changed a lot of things also when I installed my cams (cosworth 278/274 avcs) but I'm happy I got em, besides the fact that the first set of cams broke. Comparing maf volts to boost pressure, the difference is night and day. At 22psi on pump/93 with the cammed built motor I made slightly more HP than my stock motor+35r did at 26psi on 93+meth.... and it made more power with 5 degrees less ignition timing and a full point AFR richer. But I also changed the fmic, headers, uppipe, had some head porting done, larger valves, pistons/rods, etc.
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Old 01-08-2009, 08:29 PM   #4
wrxwhat
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I wish I could rev my engine out to make use of some of the higher duration camshafts.. I really wish there was some solid evidence of how much just camshafts affect our engines.
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Old 01-08-2009, 10:13 PM   #5
kellygnsd
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Eventhough I'm only rocking an 18G right not the car itself is much more excited in the upper rpm range and there's not a day when I don't get jiggy @ 7600rpm. I have the 3076 ready to go and I'm stoked because if my car feels this good with the 18G on it, it's gonna be re-goddamdickulous with the 3076 on + cams.
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Old 01-08-2009, 10:30 PM   #6
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Quote:
Originally Posted by kellygnsd View Post
Eventhough I'm only rocking an 18G right not the car itself is much more excited in the upper rpm range and there's not a day when I don't get jiggy @ 7600rpm.
Just think if your car was tuned properly

BTW are you going to make it to the track this weekend?
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Old 01-08-2009, 10:51 PM   #7
kellygnsd
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Originally Posted by Infamous1 View Post
Just think if your car was tuned properly

BTW are you going to make it to the track this weekend?
Sup man, I just changed my plugs out. The very same plugs I put in the day before we went to the track last. I put the wrong damn heat range in there and those plugs had been running a little hot. I wonder if that may have been contributing to the knock you where logging? Compression still 160 across the board.

I'm gonna be out in LA Friday night but I'll try and make it to the track. Maybe you can log me again.
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Old 01-08-2009, 11:28 PM   #8
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I've posted this up few times but I'll post it again. This was a 2.5L with 2.0 STI heads, stock cam vs kelford 272 cam, everything else was the same. Picked up almost 80whp at 7000rpm.

http://chrono.firex.org/images/cam_comparison.jpg
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Old 01-08-2009, 11:56 PM   #9
chad1979
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Holy Sh_t!!
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Old 01-09-2009, 01:54 AM   #10
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Quote:
Originally Posted by dmross View Post
I've posted this up few times but I'll post it again. This was a 2.5L with 2.0 STI heads, stock cam vs kelford 272 cam, everything else was the same. Picked up almost 80whp at 7000rpm.

http://chrono.firex.org/images/cam_comparison.jpg
Awesome, any headwork done with the camshafts?
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Old 01-09-2009, 10:42 AM   #11
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Originally Posted by wrxwhat View Post
Awesome, any headwork done with the camshafts?
The heads were large-port heads to begin with (non-AVCS) but they were the same in both plots. The stock 2.0 cam profile in the 2.0 head is simply too mild for the 2.5 bottom end. If I was running 2.5 heads with stock STI cams it would probably fall between the two plots.

Basically, I think this is a best case scenario because it's a hybrid. You may not see the same magnitude of gains in another setup until you're pushing a lot of air through the motor. There's a couple of posts showing tremendous gains with the GSC cams on TopSpeeds time attack car, you might want to search for those as well.
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Old 01-09-2009, 10:55 AM   #12
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http://forums.nasioc.com/forums/show....php?t=1456543

2.5 + GSC stg 2 cams + gt35r with spool like a gt30r... ya i'd say they work well
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Old 01-09-2009, 11:45 AM   #13
wrxwhat
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Quote:
Originally Posted by dmross View Post
Basically, I think this is a best case scenario because it's a hybrid. You may not see the same magnitude of gains in another setup until you're pushing a lot of air through the motor. There's a couple of posts showing tremendous gains with the GSC cams on TopSpeeds time attack car, you might want to search for those as well.
Again, I'm not trying to say this is what TopSpeed is doing, but if I wanted to push a product, I'd make sure the cams I wanted to sell "made more horsepower" than another manufacturer, thus why I wanted more independent results.
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Old 01-09-2009, 11:48 AM   #14
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Quote:
Originally Posted by Dobbs View Post
http://forums.nasioc.com/forums/show....php?t=1456543

2.5 + GSC stg 2 cams + gt35r with spool like a gt30r... ya i'd say they work well
That's not 30r spool silly.....




.......ask me how I know.
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Old 01-09-2009, 12:45 PM   #15
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That's not 30r spool silly.....




.......ask me how I know.
spool was a misnomer... i meant identical power at lower rpm's
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Old 04-12-2009, 06:40 PM   #16
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Quote:
Originally Posted by dmross View Post
I've posted this up few times but I'll post it again. This was a 2.5L with 2.0 STI heads, stock cam vs kelford 272 cam, everything else was the same. Picked up almost 80whp at 7000rpm.

http://chrono.firex.org/images/cam_comparison.jpg
what version 2.0 STi heads and cams where you using?
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Old 04-12-2009, 08:23 PM   #17
john 1badSTI
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Just about any good aftermarket cam with the right supporting mods is going to pick you up at least 60whp.I personally prefer kelfords and with talking with Kevin Ban the owner of Kelford he grinds a lot of the custom cams for the Rigolis and their **** flies.
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Old 04-12-2009, 09:39 PM   #18
S L O W W R X
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Quote:
Originally Posted by wrxwhat View Post
Again, I'm not trying to say this is what TopSpeed is doing, but if I wanted to push a product, I'd make sure the cams I wanted to sell "made more horsepower" than another manufacturer, thus why I wanted more independent results.
No but thats what you are implying and its pretty ****ty of you to do that.
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Old 04-12-2009, 10:04 PM   #19
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Quote:
Originally Posted by S L O W W R X View Post
No but thats what you are implying and its pretty ****ty of you to do that.
aint that big of a deal man. but i agree with you, why shouldnt they post their results?
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Old 04-13-2009, 10:08 AM   #20
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what version 2.0 STi heads and cams where you using?
Version 6 type RA. Larger ports, no AVCS.
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