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#1 Struggler

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Posted 29 November 2007 - 02:42 PM

Due to the recent confusion regarding the quality and value of the Procomp or Sydney Speed Shop cylinder heads I thought I would share this magazine article recently published in the US. Bear in mind Procomp would (you would imagine) do their best to have their product presented in the best light.

I also found a couple of other reports from users in the US. These are quoted below.

Draw your own conclusions.........

http://www.boatstore...om/procomp.html

"I checked 'em out, big and small block.
Big block heads I looked over are thin, lightweight castings with inferior valve seats (thin) and poor core shift on the castings. Smallblocks would have taken hours just to clear the casting slag in the ports, hands-down the worst castings I've ever seen.
Junk, just like the boatstore said."

"A friend of mine has a 392" sbf in a Ranger that had World iron heads on it. They "stepped up" to the Pro Comp heads and lost 1/2 second...They put the World heads back on and got their lost ET back."

"A good friend of mine bought a set of the pro-comp heads and bolted them on his blown 383.
The 383 had a 4340 assembly,SRP blower pistons,custom ground mech. roller blower cam,the CNC Pro-comp heads with a 215 cc port volume,2.0/1.6 valves,
pair of flowed 750 dp's on top of a 8-71 from the Blower Shop.
This engine was a max. effort for 92 pump gas.
Pull after pull with the Pro comp heads the best he could do was 588 hp.
He sold the heads and I told him to try a set of the 220 AFR heads.
He bolts them on and goes back to the dyno.
His first pull was 633 hp with no tuning.
He then say's the timing was only at 27* total and his A/F ratio was way fat.
He calls me back after he drops 3 jet sizes out of the front and 4 jet sizes out of the back of both carbs and then takes his timing to 33* total he also advanced the cam 4 degree's, it now went 662 hp."

#2 Struggler

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Posted 29 November 2007 - 02:50 PM

FWIW I don't understand the Street Machine giveaway. I guess SSS spends a lot with them for advertising every month but I feel they really risk losing their reputation by supporting this product and business.

JMHO.

I am looking forward to seeing the next instalment of this story. It seems strange that despite the size of the cam used the engine is peaking HP wise at 6000rpm. It should be peaking at 6750rpm or thereabouts with that amount of duration. This would tend to indicate an airflow restriction somewhere between the carby and the valve ........

#3 purpleLC

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Posted 29 November 2007 - 04:38 PM

I dont buy Street Machine, but is that the stroker Holden engine they are
giving away?

#4 Heath

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Posted 29 November 2007 - 06:58 PM

I can't understand how a company can design, produce and market a set of heads when any testing would obviously prove they do not work properly. How bad can these things be? Are they worse than factory heads or something? Like I don't consider myself to be an engine building genius, but judging from what I have read, it would be very easy to make vast improvements over standard heads off any vehicle even 20 years old if you had teh facilities. Who exactly is employed in this company? They aren't going to go anywhere unless they turn around their attitude towards quality products very promptly. What is the purpose of manufacturing such crap?

#5 boomfunk

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Posted 29 November 2007 - 07:11 PM

i have been there personally after speaking to the owner who informed me about some roller rockers...

well lets just say i walked out with nothing ...he couldnt explain how exactly they were going to work

Poor design...aparantly bolt on adjustable ..no machine work..however the studs had nothing to tighten them up..i asked how you tigthen the studs..well you just screw the stud in by hand

yeah right..screw them by hand alright

:rolleyes:

gift of the gab...it will only get them so far...

#6 v8slrtorana

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Posted 29 November 2007 - 07:36 PM

I was thinkin about a set of Procomp heads for my plastic.
Im happy now i brought some ported holden heads now after reading this article and the recent experience ive had with this Procrap carby my stupid mate brought :gun:

#7 rorym

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Posted 29 November 2007 - 08:11 PM

The stroker in Aus is Jason Ken....oversoski or some thing...short shipped me small items...then said he would ship them when I bought something else etc etc..biggest shonks in the business bar none.
R

#8 UDLOSE

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Posted 30 November 2007 - 07:39 AM

SM are doing a promotion to give away a 308 built from the worst parts that money can buy (with the exception of a harrop manifold i think). However they are claiming some bullshit high horsepower figure from the setup. I can't remember the exact details, i'll check my mag tonight.

It's just a promotion, that SSS mob would spend more than that engine is worth each month on their 2 page spread ads. This way it looks like SM actually endorse the engine. It's just a more effective way of advertising for those guys. Almost as good as their catchline "beware of cheap imitations". :D

#9 boomfunk

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Posted 30 November 2007 - 07:43 AM

i hope they give a long warranty...real long,

just keep taking it back..everytime it blows up...take it back

i would mind winning the engine..i would get a sticker made... SSS build this motor on the back window so everybody would no...


then i would write in every month to SM telling them about the broken parts..or misfortunes

also would have it dynoed...

actualy i would write to every magazine :D

i think they wouldnt like me :rockon:

#10 purpleLC

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Posted 30 November 2007 - 08:03 AM

[quote name='UDLOSE' date='Nov 30 2007, 07:39 AM']SM are doing a promotion to give away a 308 built from the worst parts that money can buy (with the exception of a harrop manifold i think). However they are claiming some bullshit high horsepower figure from the setup. I can't remember the exact details, i'll check my mag tonight.

I was at my mates workshop when they had it on the dyno the 1st time.

What horsepower are they saying it made?

I know they ran it again later with a differrent cam
and I cant remember the hp figures now ( it was a few months back)
I thought it was reasonable power.

Neds (Hercules Engines) dyno is very accurate and he dosnt fudge any figures.

Edited by purpleLC, 30 November 2007 - 08:07 AM.


#11 Heath

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Posted 30 November 2007 - 09:42 AM

boomfunk rofl i love your suggestion. I hope whoever wins that does something along those lines. :P

#12 TerrA LX

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Posted 01 December 2007 - 12:16 PM

I was doing spray painting at granville tafe when SM dumped that rust bucket they gave away one time, a silver holden ute with purple and yellow stripes and a V8, well, body and paint aside, the first motor that was built for it is still with the engine builder.
Did somebody forget these things cost money?
SSS are not the only shonks in this game.

#13 boomfunk

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Posted 01 December 2007 - 12:32 PM

^^^ is that the one they changed quarters on?, i remember it and i also think i seen it in real life driving down parramatta rd...

rust bucket hey.....typical :rolleyes:

#14 TerrA LX

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Posted 01 December 2007 - 01:50 PM

^ yep. Was not a pretty sight with them off.
Those new taiwan tailgates ain't much chop either.
Enough bog and a shiny coat of paint and mag wheels make any ride look good.

#15 UDLOSE

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Posted 02 December 2007 - 10:12 AM

[quote name='purpleLC' date='Nov 30 2007, 08:03 AM'] [quote name='UDLOSE' date='Nov 30 2007, 07:39 AM']SM are doing a promotion to give away a 308 built from the worst parts that money can buy (with the exception of a harrop manifold i think). However they are claiming some bullshit high horsepower figure from the setup. I can't remember the exact details, i'll check my mag tonight.

I was at my mates workshop when they had it on the dyno the 1st time.

What horsepower are they saying it made?

I know they ran it again later with a differrent cam
and I cant remember the hp figures now ( it was a few months back)
I thought it was reasonable power.

Neds (Hercules Engines) dyno is very accurate and he dosnt fudge any figures. [/quote]
Sorry it took me a while to get off my ass. They reckon it makes 456.7hp and 439.3lb-ft torque. They say its stroked but they don't say to what capacity. If it's a 355 thats a damn good figure if the heads are as poor as people say. It's interesting that they chose not to use one of their own carbies on it (they went with a demon).

#16 purpleLC

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Posted 02 December 2007 - 10:24 AM

[/QUOTE]
Sorry it took me a while to get off my ass. They reckon it makes 456.7hp and 439.3lb-ft torque. They say its stroked but they don't say to what capacity. If it's a 355 thats a damn good figure if the heads are as poor as people say. It's interesting that they chose not to use one of their own carbies on it (they went with a demon).[/QUOTE]



I remember the 1st time it was on the dyno it made just over 400hp,
with a very small cam, they took it away and changed the combination.

I wasnt there when they brought it back but I was told it made a lot more
HP that time. (cannot remember how much HP)

Ned just dynoed the engine for them, he didnt put it together.

I think it was a 355 cubic inch.

#17 v8slrtorana

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Posted 02 December 2007 - 12:31 PM

It's interesting that they chose not to use one of their own carbies on it (they went with a demon).

Thats because their own carbies are more usefull as door stop then a carby.
They simply don't work.
I have one here. I DID NOT BUY IT
Ill take pictures of the :gun: quality on request :D
Trust me, your better off with a 30 year old 2nd hand holley then one of these Procrap carbies.

#18 boomfunk

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Posted 02 December 2007 - 07:01 PM

what dizzy are they using?, i hope theyr not using 1 of them types that fall apart...

if it makes the numbers then it makes the numbers...however that doesnt mean it will stay together

funny if it got pulled apart and there stroker kit wasnt in it...

anything is possible.

#19 Struggler

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Posted 07 December 2007 - 07:55 AM

[quote name='purpleLC' date='Dec 2 2007, 11:24 AM'] [/QUOTE]
They reckon it makes 456.7hp and 439.3lb-ft torque.....
If it's a 355 thats a damn good figure if the heads are as poor as people say.[/QUOTE]



[/quote]
I honestly reckon you could almost get that out of the same engine with stock heads.

Anyway here is some more of what people are saying in the US....

"I bought a set and ended up sending them to [email protected] and spending a bunch of money getting them corrected. I wouldnt take another set for free. I tried contacting the guy I bought them from and of course no response. Buyer beware!"

"A friend of mine put the 215cc 64cc pro comps on his 80 camaro, it has a 383, small roller, (this is a drag car). with the heads right out of the box, the car made 20 passes, the best pass was [email protected] 122. He swapped out a set of out of the box Dart pro 1's 64 cc, 215's the car right off the trailer went [email protected] by the end of the day 5 passes later it went [email protected] with a best to date of [email protected]"

To be fair there have been 1 or 2 favourable responses too.




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