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Search found 237 matches

by Momus
Fri Aug 12, 2022 5:41 am
Forum: Engine Tech
Topic: crazy engine rebuild
Replies: 20
Views: 1048

Re: crazy engine rebuild

my buddy knows nothing about engines or performance. he went to this guy because his father and brother went to this guy and got the same kind of builds and the same hi horsepower baloney and never had anything making power of performance as the guy had promised ' he never asked for any type of eng...
by Momus
Mon Aug 08, 2022 7:23 am
Forum: Engine Tech
Topic: crazy engine rebuild
Replies: 20
Views: 1048

Re: crazy engine rebuild

Punctuation will help a lot here.
by Momus
Fri Aug 05, 2022 12:08 pm
Forum: Engine Tech
Topic: Head Studs
Replies: 26
Views: 824

Re: Head Studs

Without knowing the details of the head bolts tensile strength this is only a possibility but socket head cap screws are usually the highest strength commercial fasteners available and with a little work often make very good head fasteners.
by Momus
Wed May 25, 2022 11:03 am
Forum: Engine Tech
Topic: top ring puzzle
Replies: 16
Views: 891

Re: top ring puzzle

I've done similar to this many times My lathe has bolt on jaws and I make a set of aluminium dummy jaws and turn them in-situ to the oil ring width to hold the piston true. The jaws will have a fair bit of stand off- you might need spacers. Use an insert or steel cutter well relieved and narrower th...
by Momus
Mon May 16, 2022 11:11 pm
Forum: Engine Tech
Topic: Aluminum vs iron heads on a 9:1 daily driver
Replies: 31
Views: 1663

Re: Aluminum vs iron heads on a 9:1 daily driver

Aluminium everytime, if just for the weight saving and cooling improvement. Iron heads are obsolete. That's a very broad statement- and I disagree. I've run RHS iron and AFR alum on a 355, it's NOT a night and day difference- in fact I was disappointed at the difference. EFI application, I'll say a...
by Momus
Sun May 15, 2022 10:58 pm
Forum: Engine Tech
Topic: Titanium Valves In A Daily Driver
Replies: 36
Views: 10748

Re: Titanium Valves In A Daily Driver

Full coverage CrN is the universal standard now. It's wonderful.

Hard bronze is probably preferred seat material but the stuff seems to work fine on ferrous as well.
by Momus
Sun May 15, 2022 10:51 pm
Forum: Engine Tech
Topic: Aluminum vs iron heads on a 9:1 daily driver
Replies: 31
Views: 1663

Re: Aluminum vs iron heads on a 9:1 daily driver

Aluminium everytime, if just for the weight saving and cooling improvement.

Iron heads are obsolete.
by Momus
Sun Mar 20, 2022 10:35 am
Forum: Engine Tech
Topic: Oil capacity
Replies: 12
Views: 1009

Re: Oil capacity

The original dipstick should probably be used set the level as it will give the correct amount for the position of the pickup.
by Momus
Wed Mar 16, 2022 1:51 am
Forum: Engine Tech
Topic: Beryllium Copper Seats/Bronze Guides and Titanium Valves
Replies: 32
Views: 1570

Re: Beryllium Copper Seats/Bronze Guides and Titanium Valves

fabr wrote: Tue Mar 15, 2022 11:58 am I'm thinking but have no info that it would be a DLC coat if black or dark gray.
Not DLC.
I have plenty of DLC parts to compare.
by Momus
Tue Mar 15, 2022 11:36 am
Forum: Engine Tech
Topic: Beryllium Copper Seats/Bronze Guides and Titanium Valves
Replies: 32
Views: 1570

Re: Beryllium Copper Seats/Bronze Guides and Titanium Valves

I could be wrong, but I think the Corvette runs Ti valves ......I know Ducati does as well.....If they last in those applications, they will in others Coated Ti intakes and sodium filled exhausts. Back to my original question. I don't think there is anyone that will doubt the much greater endurance...
by Momus
Sat Mar 12, 2022 7:50 pm
Forum: Engine Tech
Topic: Beryllium Copper Seats/Bronze Guides and Titanium Valves
Replies: 32
Views: 1570

Re: Beryllium Copper Seats/Bronze Guides and Titanium Valves

CrN 110% It is a superlative coating: very hard, very tenacious, not expensive, low friction and aesthetic.

My feeling is anyone selling uncoated, or moly coated valves have very old stock they are trying to quit.
by Momus
Sat Feb 19, 2022 9:05 am
Forum: Engine Tech
Topic: Shot peening piston crown?
Replies: 34
Views: 2799

Re: Shot peening piston crown?

If you have ever seen for example a late crappy cast iron SBC head like the 882 casting come out of a shot peen machine ( that has been loaded with fresh shot ) with all its machines edges now rounded over by 1/4” you would then know that shot peening is not a process to be used on anything other t...
by Momus
Thu Jan 20, 2022 11:21 pm
Forum: Engine Tech
Topic: Ring Pack Thickness: Question
Replies: 114
Views: 4441

Re: Ring Pack Thickness: Question

For something that you use a lot the benefits of improving fuel consumption can pay for some as well, a hp of fuel is getting expensive these days. I believe Total Seal mentioned that they had made 0.6mm rings, not sure for what though. Must be what donclark above mentioned. Damn those are thin . N...
by Momus
Thu Jan 20, 2022 1:47 am
Forum: Engine Tech
Topic: Ring Pack Thickness: Question
Replies: 114
Views: 4441

Re: Ring Pack Thickness: Question

You would be hard pressed to find a modern engine with compression rings thicker than 1.2 1.2 and a 3 mm oil ring.

Many are 1-1 2.0 oil and have 5 or 7 warranties; the engines are out lasting the rest of the car.