[INTMD8]

I'm in need of guides/valve job on my F355 heads. The stuff is tiny. One angle valve job for whatever reason. (needed to pull heat out of tiny valves? I dont' know)

Any recommendations for a shop that would be best for this?

I know most are likely capable, looking for who would be the best/meticulous. Attention to detail is my priority, not cost.

Thanks!

 

[n2omike]

Might contact a higher end motorcycle shop. They will likely be the most experienced with those, as a lot of bike heads come with 5 valves. They may also be able to guide you in respect to valve jobs. At least, that's what I would do.

 

[ndmp40]

Check with Jim Johnson, posts here as stuska1. He is an incredible machinist. If he cant do it, he will refuse the job.

 

[Ed Curtis]

George Bryce?

 

[bthomas]

Leuer engine and machine in dfw, tx
I know has done several sets of Ferrari heads over the years.

 

[Turbobuick6]

If I am not mistaken, Chris Frank does these heads (may be lambo heads) none the less he also does ford modular and the M8 HD stuff too.

 

[Stan Weiss]

Tate Casey
CAROBU Engineering LLC

Carobu High Performance Parts and Accessories for Ferrari

www.carobu.com

Stan

 

[INTMD8]

Thanks guys, much appreciated.

 

[1963 corvette]

Any briggs weed eater shop should be qualified to work on those glorified Volkswagen engines.lol.Honestly they are nothing that anyone with good equipment and experience could handle.The guy I bought my engine equipment from does bike,porsche and about anything out there.You probably have 8mm stems which most shops should have a pilot to fit those guides.

 

[DarkMatter]

I've seen and Know Greg G does some older high dollar Vintage European head work...

 

[Top355x]

Bouchers automotive machine shop in Rowley MA has been doing Ferrari engines for a big Ferrari restoration shop so another option depending on where you are

 

[INTMD8]

Any briggs weed eater shop should be qualified to work on those glorified Volkswagen engines.lol.Honestly they are nothing that anyone with good equipment and experience could handle.The guy I bought my engine equipment from does bike,porsche and about anything out there.You probably have 8mm stems which most shops should have a pilot to fit those guides.

I thought the engine in my 993 was closer to a glorified Volkswagen.

Valve stems are 6mm.

 

[Greg G]

If the valve guides in the heads now are bronze.....it is best to core drill them about an inch deep from the valve pocket side, leaving about .030" wall thickness, then make a punch that fits into the new hole and tap the old guides out. I've seen a few guides that galled on installation at Ferrari (forgot to lube them?), and if the machinist tries to punch them out normally it will swell the tip of the guide larger than the guide hole bore and enlarge the head. If the guides are steel, they should come out easily without doing any of that.

Make an installation tool in the lathe that consists of a driver that contacts the junction where the seal portion of the guide meets the main body and a bushing that fits tight in the bucket bore and centers the guide and driving tool. The seats will come in quicker.

If you are willing to put the seating angle right out to the edge of the valve you can get a bottom cut on both seats, which helps flow somewhat. I did that on the Challenge heads many years ago before they had to start sending everything back to Ferrari for maintenance. It was worth 10 rwhp.

 

[INTMD8]

^ Thank you, that kind of input is much appreciated. The original guides are bronze and have a reputation of early failure. A few years after the first cars rolled out, Ferrari changed the guides from bronze to steel in an effort to fix the problem of premature wear.

Now, nearly 28 years after the first cars rolled out...and many failures..many replacement/offerings are available but bronze replacements said to be harder than original.

Fine, no surprise that's part of the learning curve of greatly increasing operating rpm. What strikes me as odd however is the single angle valve job?

Put all this effort into specific output but be lazy on the valve job? And, seems they put effort into factory port work.

Another thing I should mention is, the valve timing. Center valve is said to open/close 10deg later than the outside valves.

Other than that, I think their efforts towards volumetric efficiency are commendable, for the time. Intake port entry- vertical. Individual throttle bodies. Intake plenums, ram air basically, from corners of quarter windows. Exhaust terminates directly at/above underbody diffusers.

 

[DarkMatter]

Yeah I follow some of these guys like a well kept Dog. Told ya GG.
👍

 

[DualQuadDave]

Head Games Motorworks is shop that does a lot of OHC multiple valve stuff. I have no experience with them, but the Subaru/Toyota/Nissan guys jerk off to them all the time. They have some record setting heads in the import drag world. Probably worth a call.

 

[ROB]

You will be more than pleased if Greg Good works on your Ferrari heads.

 

[TwofoldDesigns]

Bob Norwood not an option?