Head Work - Recomendations

Boxer 6 · 01-01-2006, 02:29 PM

I'm looking for good head

work. I will need to get the heads on my 3.2 done soon. Anyone have good experiences that they want to share and what should I budget to get the job done? Does it make sense to twin plug and "plug" those holes in preparation for when I am ready to get the Electromotive system?

Thanks!!

afterburn 549 · 01-01-2006, 05:18 PM

The ans .Is Absolutely YES!!! and dont let anyone say no . Once double plugged you have options dwn the road.......and that cant hurt. Its cheap to do it while apart...so much complicated latter.
As far as head work....almost a religion here..I do my own others say bigger /smaller ports.....for MFI/ Turbo CIS and what knot.....you will have to sort that one out.....I am a firm believer smooth is better then on both ends for a lot of reasons.....(Please dont start a thread war on this pt guys..I know the arguments just stating what I like.....might not be for everyone.)

DonE · 01-01-2006, 05:52 PM

Depends on how much and what you will do with the car. If its a daily driver and 100% street driving, then add up the costs (machine work, plugs, wires, iginition system, etc) and make your decision. Chances are, dual plug for a street driver is not worth it.

If you are going to build a hot rod with high dome pistons, then its probably a good idea. If you are going to build a track car, then yes.

As for head work, probably the most important point is finding a machine shop that is successful (improving performance) with their headwork program. Tell them what you want to acheive and let them make the recommendation.

eapcpa · 07:52 PM

Lots of good shops, in California. I use German Precision but there are others. It makes sense to do it while it is apart. Call Ted @ German Precision and discuss it with him.

code7rpd · 01-01-2006, 08:51 PM

I used German Precision for my recent rebuild and Ted is a really nice, helpful, and knowledgable guy.

wilke3169 · 01-02-2006, 03:27 AM

I used EBS. Call Jon he will be more than happy to answer and advise on any question you have.
http://www.ebsracing.com/

ChrisBennet · ChrisBennet's Garage

(Anchor) Atlantic Enterprises right next door to you in NJ does all my heads. Excellent quality, very reasonable prices and quick turnaround. AA # is 856-589-5577
-Chris

safe · safe's Garage

Quote:

Originally posted by afterburn 549
The ans .Is Absolutely YES!!! and dont let anyone say no . Once double plugged you have options dwn the road.......and that cant hurt. Its cheap to do it while apart...so much complicated latter.

Is it not a waste of money without raising the compression (NA engine)?

I don't see the point of doing the machine work now and then add the expensive stuff later??

cgarr · cgarr's Garage

As Safe said if its stock I understand there is no advantage to twin plug, Im going 98mm and 10:5 cr so I did twin plug, so if you raised your cr later everthing would have to come apart anyhow to do so, I would either do the whole enchilada now or dont waste your money on the xtra machining although it is easy to do, they just get a lot of money to do it.

BReyes · BReyes's Garage

Sounds like you are on the slippery slope!!!!

Enjoy

Regards,

Boxer 6 · 01-02-2006, 09:19 AM

I thinks it's more than just compression. The amount of fuel entering the combustion chamber is the other big factor. The more fuel you can efficiently burn, the more power

Compression just helps with this process. I just thought by having it done now, it will allow greater flexibility in the future (i.e PMO Carbs). I think the cost of the machine work is relatively inexpensive compared to all the ancillary ignition parts.

Man it's tough to make a Porsche engine any better than it comes from the factory. LOL

ChrisBennet · ChrisBennet's Garage

It didn't occur to me that you might want to have the heads modified. A 3.2 head is said to flow enough for 300hp in stock form. Unless you are trying to make lots of horsepower I would leave the ports alone.

If you ever need to get the car smogged you will find that going to a factory 3.6 is more cost effective than trying to convert upgrade a 3.2. (BTDT)
-Chris

MBruns · 01-02-2006, 11:38 AM

Mark, we can do what ever you need in house at JB Racing, twin plug,street or race valve jobs,clean up port work to full race,Flow bench work etc... we are in Central Fla. take a look at our web site if you like.
Mike Bruns JBRacing.com

Boxer 6 · 01-02-2006, 01:07 PM

Quote:

Originally posted by MBruns
Mark, we can do what ever you need in house at JB Racing, twin plug,street or race valve jobs,clean up port work to full race,Flow bench work etc... we are in Central Fla. take a look at our web site if you like.
Mike Bruns JBRacing.com

WOW! That's some shop! That engine on your dyno brings back some fond memory's of being around my NHRA friends. Thanks for the link.

Jeff Jagusch · 01-02-2006, 02:25 PM

Give Henry a call at Supertec, he can help you out with the cylinder heads as well as any other engine issues.
Nice guy too! He has been VERY helpful with my engine projects!

http://www.supertecperformance.com/

Jeff

cstreit · cstreit's Garage

Quote:

Originally posted by wilke3169
I used EBS. Call Jon he will be more than happy to answer and advise on any question you have.
http://www.ebsracing.com/

Second that. I enjoyed working with Jon

Boxer 6 · 01-02-2006, 03:33 PM

I hear MotorMeister are the best

cgarr · cgarr's Garage

Quote:

Originally posted by Boxer 6
I hear MotorMeister are the best

you

DonE · 01-02-2006, 05:28 PM

Quote:

Originally posted by Boxer 6
I thinks it's more than just compression. The amount of fuel entering the combustion chamber is the other big factor. The more fuel you can efficiently burn, the more power Compression just helps with this process. I just thought by having it done now, it will allow greater flexibility in the future (i.e PMO Carbs). I think the cost of the machine work is relatively inexpensive compared to all the ancillary ignition parts.

Man it's tough to make a Porsche engine any better than it comes from the factory. LOL

Actually, the two most important components for twin plugging are compression and displacement. The higher the compression, the harder it is to light the fire. Also, the larger the volume to light, the more the benefit to have multiple spark sources. Then add an obstruction like high piston domes, low AFR's, timing, spark plug placement and so on, the argument for twin plug improves.

In any event, talk to an expert for their input on your application. I chose JB Racing because of their proven race program and their willingness to take the time to talk to me about my options.

I think you can really improve an earlier porsche motor if you plan it out carefully. There are quite a few things you can do economically to wake these motors up. At the same time, Chris B has good advice for big power.

anh911 · 01-02-2006, 05:45 PM

Quote:

Originally posted by Boxer 6
I thinks it's more than just compression. The amount of fuel entering the combustion chamber is the other big factor. The more fuel you can efficiently burn, the more power Compression just helps with this process.

There's no reason to add more fuel unless you have more effective compression. That means either you increase the compression ratio or force induction via turbo or supercharger. For any given displacement/HP engine the amount of fuel required is known, you can't make more HP by adding more fuel only. If you do inrease ECR by some means then twin plug can be a plus. Beyond a certain CR (subject of many debates here) its a must. On Porsche motors, the theory is that it has to do with some inherent inefficiency regarding flame front/travel in the combustion chamber due mainly to the less than optimal spark plug location.
Chris is correct, the 3.2 heads flow plenty out of the box.