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Comp Cams Camquest
#1
Just curious how accurate this utility really is? I realize they use this to sell products so some inflation should be expected. I entered my planned information in and it came up with what I would consider to be some crazy numbers.

540 HP at 6000
508.9 ftlb at 4500

According to the builder who assembled my Aussie 2V heads I should be looking at around 425 HP at 5800 and 410 ftlb at 4000 for peak numbers. This is a significant difference.

Any thoughts?

73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

- Jason


[Image: 082-hot-rod-power-tour-2017-1970-1970s.jpg]
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#2
Here's what Hot Rod magazine found:

http://www.hotrod.com/articles/ccrp-1106...-selector/



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#3
Hi

I tested it along with Dekstop dyno. and Ive got nearly the same results. Il probably dyno my Engine this summer so Il see how accurate the software is. With camquest your stuck with compcams camshafts, with desktop dyno you could punsch in what you want.
Regards Rob

For knowing your limit you have to pass it thumb
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#4
their free program is virtually useless . it is grossly inaccurate and it only gives peak numbers . nobody drives their car on the street at max rpm all the time . it is best to use the advice of your builder if he is experienced with these engines.
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#5
Agreed, the numbers seem highly exaggerated. On that note it is still fun to play with to get a very rough idea of peak power.

351w - Ford racing GT40X 178 cc aluminum heads - Ford racing(crane) 1.7 roller rockers - Comp Cams 280H magnum cam .544" / .544" lift - ARP hardware - hedman longtubes - magnaflow exhaust with X pipe - Duraspark - MSD digital 6al box - MSD TFI coil - optima red top battery - tuff stuff 140 amp alternator - weiand stealth intake  - edelbrock 1406 600 carb  - march pullies and brackets - Be cool fan controller - derale electric fan - FMX trans - motive 4.11 gears - traction lok - lakewood traction bars.                                            










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#6
I used it, and I don't have any reason to doubt the results. I didn't know squat about cams, and I found the utility quite helpful in explaining things while I was using it. I saw the results with the same cam and engine set-up in another forum member's car (73VertProject - Doc) and what can I say... I liked what I saw ( http://www.7173mustangs.com/thread-celeb...ertproject ) - there's something about 0-100 in 13 seconds (backed by an FMX and 3.50 gears) that's hard to argue with.

It's a tool to help people make decisions about car parts, and certainly not the end-all/be-all of cam information. Rolleyes

Conversely, I don't know anybody who has actually used CamQuest and followed up with a dyno run - it would be interesting to know just how close they got it. I'm sure, however, that CompCams wouldn't have gone to the trouble and paid the software developer ridiculous amounts of money to merely crap out a sales tool that is nowhere close to being realistic - they'd be opening themselves up to all sorts of lost revenue/customers and potential lawsuits, were the utility not somewhat close to the over/under error margins.

That being said, I wouldn't recommend anybody base anything serious on the output of a free utility found on the internet. As I've said in the past (gist), "Ball park figures only to help select a cam to fit your needs."

BTW - regarding reporting peak horsepower numbers: what do you expect? Nobody sells performance parts by saying, "62 hp/49 ft-lbs at idle." whistling Slap

Eric

[Image: mach1sig2.gif]
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#7
Very true Eric.

351w - Ford racing GT40X 178 cc aluminum heads - Ford racing(crane) 1.7 roller rockers - Comp Cams 280H magnum cam .544" / .544" lift - ARP hardware - hedman longtubes - magnaflow exhaust with X pipe - Duraspark - MSD digital 6al box - MSD TFI coil - optima red top battery - tuff stuff 140 amp alternator - weiand stealth intake  - edelbrock 1406 600 carb  - march pullies and brackets - Be cool fan controller - derale electric fan - FMX trans - motive 4.11 gears - traction lok - lakewood traction bars.                                            










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#8
Those numbers seem way high to me. I think your engine guy is pretty close.
Chuck
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#9
c9zx;285792 Wrote:Those numbers seem way high to me. I think your engine guy is pretty close.
Chuck
Totally agree and even then the builders numbers maybe a little off too. 2V with 4V valves aren't a great combination to start (in fact people with those heads on my builds I tell them to sell them and get standard heads) let alone the other inherent problems with the 2V CC heads with valve shrouding and their ports are are different around the pushrod area and go very turbulent around the .450-.500" lift mark and even the best head porters with many years of experience on these heads still can't get them totally right and still charge 1000's of dollars just in port work. In saying that though the 2V can still make great power, 600+ HP running 9 sec quarters in 3500lb cars is still pretty stout for the lowly heads. I've done heaps of 2V Clevelands over the years, from stock to 10 second street cars, to know what's achievable with them and as has been said, a free calculator will only tell "maybe" peak results, maybe being that everything is optimal for your combination. Also remember people will tell customers numbers to sell products, so take whatever they say with a grain of salt. I've not long spent hundreds of dollars on the latest engine software and if these free calculators were accurate (I don't know what other info they tell as I've never used them) then nobody would be buying these programs.
Anyway good luck with the build and just enjoy it as it's going to be better than a stock Cleveland anyway. It may even be one of those builds that defy everything and goes like a cut snake. Good luck with it all and let us know how it all goes.
Cheers Jason
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#10
Mister 4x4;285773 Wrote:Conversely, I don't know anybody who has actually used CamQuest and followed up with a dyno run - it would be interesting to know just how close they got it.

Well I am an engine builder and have built countless engines using comp cams and had many dynoed then checked cam quest just to see how far off they were and they were always much higher which is why I said it was useless.
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