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speed pro cams?

Started by _bon_scott_ , Aug 31 2007 12:44 AM

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22 replies to this topic

#1 _bon_scott_

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Posted 31 August 2007 - 12:44 AM

some guy on ebay is selling 'speed pro' cams for around $130 ( http://stores.ebay.c...3QQftidZ2QQtZkm ), specs are:
MILD:
Provides good idle quality with good fuel economy & throttle response between 1500 rpm - 4000 rpm & goes to a
maximum of around 4700 RPM
Cam spec sheet is included with the cam

Brand
Genuine Speed Pro - Made In USA

Specs
Adv duration - int 260 deg ex 270
Duration @ .050" - int 194 deg ex 202 deg
Valve lift - int .390" ex .410"
Lobe separation - 110 deg

and 'HOT':
It has a good idle with lope & provides good mid - upper RPM power & torque between 1800 rpm - 4500 rpm & goes to a
maximum of around 5200 RPM

Genuine Speed Pro - Made In USA

Specs
Adv duration - int 282 deg ex 282
Duration @ .050" - int 208 deg ex 208 deg
Valve lift - int .422" ex .422"
Lobe separation - 110 deg

any thoughts? i'm looking to do a bit of work to my motor and was just wondering if these would be a viable option. also would the 'powerboss' lifters that they sell be suitable and any good?
cheers
chris

Edited by bon_scott, 31 August 2007 - 12:45 AM.

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#2 _tyre fryer_

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Posted 31 August 2007 - 01:30 AM

Was wondering exact same thing.Will be good to hear some opinions.

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#3 _bon_scott_

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Posted 01 September 2007 - 01:40 PM

anyone have any ideas?
what do the specs say they will be like?

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#4 _bon_scott_

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Posted 02 September 2007 - 08:17 PM

bumpity

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#5 Heath

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Posted 02 September 2007 - 11:04 PM

I wouldn't really describe their Holden 6's "Hot" cam as a very serious cam at all. 208/208 [email protected]" is still very small. That'd be fine in a reasonable V8 but in a six you want to be able to rev it out a bit more as you have less torque.

I might invest in one of those babies for the 202 I've got in the LX atm before i rip it out later on down the track and put a serious motor in.

Nice and cheap, and that $35 set of 6cyl lifters would probably do the job for a budget performance build. Didn't look at the price for the V8 ones but it's probably much the same.

Like if you're building a hot motor that you are going to have professionally built and are using good quality products then you may as well finish it off with high quality cams and lifters, but if you want to build a motor to have some fun with on a medium budget, this would be pretty good I reckon.

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#6 _bon_scott_

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Posted 02 September 2007 - 11:07 PM

cheers for that

do cams work the same way in 173s compared to 202s like they do in 253s compared to 308s? like mild for 308 is medium for 253?

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#7 _bon_scott_

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Posted 02 September 2007 - 11:16 PM

also would i need to upgrade anything to use one?

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#8 _fastchalky_

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Posted 04 September 2007 - 08:47 AM

A cam with 208 degree duration @ 50 thou lift is a good daily use cam with a bit of lope at idle and good mid-range power. A bit big for an auto transmission, but great for a manual gearbox. I would fit an alloy camshaft gear rather than the stock fibre one if you are using this camshaft. Besides the extra capacity, the 202 has a longer stroke (how far the piston travels up/down in the cylinder) over the 173 so it has more low-down torque. To match the urge of the 202, but you will have to use it higher in the rev range, you would fit a more aggressive cam in the 173. This is also true of the 186, which is popular because it seems to like higher revs than a 202.

A 208 degree duration @ 50 thou lift camshaft, new lifters/cam gear with a modified cylinder head, extractors and a single 2-barrell carburettor with a 3.36 diff ratio is a very effective and cheap way to lift the performance of a 173 or 202 torana and it remains fairly drivable day-to-day.

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#9 Heath

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Posted 04 September 2007 - 05:24 PM

Agree with the above, word for word.

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#10 _Adam Perth_

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Posted 04 September 2007 - 05:45 PM

yep. have used these brand in the past in Holden and Chev V8's
would use them again.

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#11 _bon_scott_

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Posted 04 September 2007 - 05:47 PM

Sounds good, it's actually a vh commodore though but it has a 5 speed and 3.36 diff already. Would the varajet be enough for this cam, and also by modified cylinder head, what wouold this entail? Just a shave and mild port?

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#12 Heath

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Posted 04 September 2007 - 05:56 PM

Mild port, ideally bigger valves or at least a higher rocker ratio...

Varijet and std valves would be fine for the mild cam... 'HOT' one would be pushing it. Probably wouldn't use the whole cam, only 3/4 of it.

Edited by Heath, 04 September 2007 - 05:57 PM.

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#13 _Adam Perth_

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Posted 04 September 2007 - 06:03 PM

at least match port the head to manifold if nothing else.

the varijet 1 is 375 cfm,
the varijet 11 is 398 cfm

thats heaps, do not make the mistake of going back to 350 holley.

the HQ race cam is a good grind for standard internals..

i have found holden 6's are better mild than hot for all round street use + u have a 5 speed to make a mild one work well.

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#14 _tyre fryer_

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Posted 14 October 2007 - 03:43 PM

sorry to be a grave digger. but i'm now looking at a cam.
I'm running; worked head (fat springs bigger ports high comp xu1 valves) ww stromberg, electronic ignition, extractors, 2 1/4" free flow pipe and an aussie 4 speed. I'm looking for a cam that'll make her wanna get up and go. would the 'hot' cam see this happening because looking at the crow cams website it's still only about a 25/65 cam and i was looking at running atleast 32/68 if not 30/70 but no more.
thanks guys.

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#15 _Bomber Watson_

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Posted 14 October 2007 - 06:50 PM

yeah, the hot cam in that list is mild as.

the cam i have in the shed for my 202, which i would class as fairly worked, has [email protected], and .555" lift. i still wouldent call this a omfg uleb so hot cam though.

i recon that "hot" cam would work with damb near any combo lol.

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#16 _tyre fryer_

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Posted 14 October 2007 - 07:17 PM

so 30/70 you reckon?
I think i might give these ones a miss and get a dynotech or whatever one for $130

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#17 _Bomber Watson_

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Posted 14 October 2007 - 08:09 PM

30/70 isnt really a term for meansuing cams. its a term used by kickers.

you gotta talk in .050 duration and lift if you wanna actualy get a realistic evaluation.

but, lowering myself to kickerism for a while, 30/70 is still mild as, but would be ok fun i suppose.

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#18 _tyre fryer_

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Posted 14 October 2007 - 08:46 PM

.050" DUR. in 214 ex 224
I'm thinking this is the perfect cam as the max i revv to is 5500 and it starts at 2200 and goes to 5200. this would be okay for a street cam right?

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#19 _Bomber Watson_

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Posted 14 October 2007 - 09:38 PM

yeah would be fairly good methinks.

at the end of the day the diff ratio plays a big role to though. that cam wouldent be any good around town with say a 2.78 diff. but with a 3.36 or so would be fairly good.

the highway is a difernt story.

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#20 _tyre fryer_

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Posted 14 October 2007 - 09:45 PM

i'm running a 3.08 i want a 3.36.
your cam has massive lift, which the experts reckon is good.
I beleive the cam i quoted was used in the lc xu1 at bathurst.

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#21 _LX8VD69_

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Posted 14 October 2007 - 10:56 PM

incase you are dubious of speed pro, i wouldnt be too fussed as they are a subsiduary of federal mogul, i used one of their cams once in my old 253. it was cheap and very good quality :spoton:

cheers adam

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#22 _JBird_

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Posted 14 October 2007 - 11:58 PM

I was always of the mind set that you get a cam to make the most head, As in you get your head flow tested and go from there - a bit more $$$ but worth it IMO.