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Aug 12, 2006 | 07:42 PM

JFTaylor

Thread Starter

Race Director

Joined: Oct 2004

Posts: 10,516

Likes: 2

From: Virginia Bch VA

Cruise-In VI Veteran

Cruise-In VII Veteran

St. Jude Donor '06

Heads

Many have done P&P heads. Some shaved to increase compression. My question is: How about if I do a cam without doing the heads? What am I missing? I understand the $ savings by doing them at the same time but $1,200 for heads just does not seem cost effective to HP gain.

Your thoughts & experience appreciated.

Aug 12, 2006 | 07:50 PM

0Sales@HPE

Former Vendor

Joined: Nov 2004

Posts: 613

Likes: 0

Quote:

Originally Posted by JFTaylor

Lots of people just do a cam and leave the stock heads till they put in a bigger motor, or maybe just want the extra 35-55 rwhp. The cam by itself is going to give a bigger gain than the heads will... Usually 50-75 rwhp from a good cam like our C cam (236/238 on a 112, .605/.608 lift), or our S cam (238/242 on a 113, .610/.615 lift). You'll notice a significant gain from just doing a cam.... Heads after a cam install are more like, you can tell a difference, but it's not a huge difference.

Chuck @ HPE
281-448-1300

Horsepower Engineering
Mon-Fri: 9-7
Closed Weekends

Aug 12, 2006 | 08:06 PM

mrm1149

Le Mans Master

Joined: Oct 2004

Posts: 9,369

Likes: 4

From: Zephyrhills, Florida

St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13

Is it a misconception that a cam is harder on the stock heads re} springs etc?

Aug 12, 2006 | 11:13 PM

0Sales@HPE

Former Vendor

Joined: Nov 2004

Posts: 613

Likes: 0

Quote:

Originally Posted by mrm1149

Is it a misconception that a cam is harder on the stock heads re} springs etc?

We replace the springs with every cam install... Stock springs aren't good for anything above and beyond the stock cam and rockers. Truth of the matter might even be that aftermarket cams are easier on stock heads rather than aftermarket heads, simply due to the fact that aftermarket heads 90% of the time come with heavier than stock valves that are harder on the seats when opening and closing. Nothing I'd ever concern myself with at all, just theoretically speaking.

The factory seats might not be able to take the abuse quite as well as an aftermarket hardened seat, however I have never seen this become a problem...

Chuck @ HPE
281-448-1300

Aug 13, 2006 | 01:26 AM

Jedster

Instructor

Joined: Jan 2005

Posts: 213

Likes: 0

From: Port Richey Florida

If it were me, I would get a cam first. The ones mentioned would give you a very nice sounding rumble.

Aug 13, 2006 | 07:56 PM

JerriVette

Race Director

Joined: Nov 2003

Posts: 16,066

Likes: 4,149

From: Bergen county NJ

Do heads and cam together.

JMO

Aug 14, 2006 | 06:05 PM

pawngod

Racer

Joined: Jan 2006

Posts: 265

Likes: 1

From: OKC OK

i been thinking about a cam ....i have most of the bolt ons ..i am not going to replace heads or cam chain or any valve train components .....what size cam do you recommend , current mods aare ...cai..dynatech system ..corsa catbacks....rest is stock..no tune yet 160stat.....oh yes and a price for cam..thanks

Aug 15, 2006 | 01:25 PM

JFTaylor

Thread Starter

Race Director

Joined: Oct 2004

Posts: 10,516

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From: Virginia Bch VA

Cruise-In VI Veteran

Cruise-In VII Veteran

St. Jude Donor '06

Quote:

Originally Posted by pawngod

A little research:

Brand Dur LSA Lift Rmks
207/217 .525/.525 116 Lsa
Stock 204/211 116 0.525
CarTek 2 222/226 114 0.562 Best @ 2600-6600
CarTek 2X 223/230 114 0.590 Best @ 3200-6500
CarTek 3X 232/234 114 0.600 Best @ 3800-7000

LGM G2 224/224 114 0.580
LGM G5 224/230 114 .581/.572
LGM G5X1 228/232 114 .588/.574
LGM G5X2 232/240 114 .595/.608
LGM G5X3 2??/2?? 114 .600/.610

Comp Cams XTR RPM XR273HR 220/224 112 .530/.534
Comp Cams XTR RPM HIGH LIFT XR281HR 228/230 112 .571/.573
Comp Cams CS XR270HR-10 218/224 110 .495/.520
Torquer V2 from Texas Speed 232/234 112 43 RWHP from the cam and an additional 7.5 RWHP and 7.5 Torque from the porting

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Aug 15, 2006 | 06:14 PM

c5freak

Drifting

Joined: Dec 2001

Posts: 1,426

Likes: 0

From: Canton Michigan

Quote:

Originally Posted by pawngod

Sometimes you just have to bite the bullet and spend the extra cash to do it right. New cam without new springs=Trouble.
Oil pump and timing set is right there on the front of the engine so why not do it with the cam? I don't get it.

Al.

Aug 15, 2006 | 09:20 PM

#10

0Sales@HPE

Former Vendor

Joined: Nov 2004

Posts: 613

Likes: 0

Quote:

Originally Posted by pawngod

Our most popular cam is the biggest one that we offer for the stock bottom end. Anything bigger simply is just too risky with piston to valve clearance. Anything smaller, just doesn't make as much power..

The kit includes,

HPE S cam (238/242 on a 113 LSA, .608/.612 lift)
Chromemoly pushrods
Patriot Gold dual valve springs (max lift .650)
Titanium retainers
Super 7 Lock
Locators
Valve Seals
Crankshaft Balancer Bolt

The price is 774.95 + shipping. I can help you out with the tune when the time comes. Or you can send us the car and we'll do a whole bunch of stuff as well

Just let me know!

Chuck @ HPE
281-448-1300

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