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Search found 2679 matches

by pamotorman
Wed Sep 04, 2019 11:01 pm
Forum: Engine Tech
Topic: Oil Immersed Exhaust Valve springs
Replies: 9
Views: 729

Re: Oil Immersed Exhaust Valve springs

oil does a lot to cool the valve spring as I saw a movie of a test done at the GM tech center. the stock block chevy engines test running at indy were losing valve springs in just a few laps. GM did a dyno test where they could shut off the oil to the top end and with see thru valve cover you could ...
by pamotorman
Fri Aug 16, 2019 5:53 pm
Forum: Engine Tech
Topic: land rover sleeve drop
Replies: 24
Views: 2030

Re: land rover sleeve drop

never did a land rover but doing air cooled 2 stroke dirt bike sleeves I cut shallow grooves on the OD and filled them with red Loctite before pressing them in. did it help who knows but they never sunk
by pamotorman
Tue Jun 25, 2019 11:30 am
Forum: Engine Tech
Topic: All aluminum engine vs cast iron (Piston to head)
Replies: 14
Views: 1196

Re: All aluminum engine vs cast iron (Piston to head)

when I built all aluminum BBC with steel rods I set the pistons at .010 out of the block at piston rock both sides with a .042 head gasket. I told the owners not to run at full throttle till up to temp.
by pamotorman
Sun Jun 02, 2019 6:49 am
Forum: Engine Tech
Topic: Reputable links for horsepower from windage tray/crank scraper
Replies: 242
Views: 8767

Re: Reputable links for horsepower from windage tray/crank scraper

I saw a video at the GM tech center of a small block race engine with a plexiglass window in the wet sump road race pan and at speed it looked like a big brown rope wrapped around the rotating assy. a 14 inch deep dyno pan was installed without any thing else changed and the engine picked up 30 HP.
by pamotorman
Fri May 24, 2019 7:46 pm
Forum: Engine Tech
Topic: Reputable links for horsepower from windage tray/crank scraper
Replies: 242
Views: 8767

Re: Reputable links for horsepower from windage tray/crank scraper

scraper and windage tray on LS engines and you can bet GM put a lot of dyno time on this setup
by pamotorman
Sat May 04, 2019 10:35 am
Forum: Engine Tech
Topic: Unbelievable engine survival main cap break
Replies: 28
Views: 2370

Re: Unbelievable engine survival main cap break

back in the days with iron caps I would mill the caps flat and use a cap strap made of CRS and longer studs.
by pamotorman
Fri Apr 26, 2019 2:43 pm
Forum: Engine Tech
Topic: Replacement for the Holley 660 center squirters
Replies: 47
Views: 1930

Re: Replacement for the Holley 660 center squirters

on the ones I wanted to hide the 4 shooter for tech inspection I ran a brass tube back to the center of the carb and used the air cleaner boss as the squirter by drilling holes in it. I did AFB carbs the same way. :D
by pamotorman
Fri Apr 26, 2019 2:18 pm
Forum: Engine Tech
Topic: Replacement for the Holley 660 center squirters
Replies: 47
Views: 1930

Re: Replacement for the Holley 660 center squirters

back in the 60s I build my own 4 shooter using this device I built using a 1:1 linkage and a 50 cc pump.
by pamotorman
Sun Apr 14, 2019 6:46 pm
Forum: Engine Tech
Topic: Venting about so called "builders"
Replies: 46
Views: 3485

Re: Venting about so called "builders"

I rebuilt several SBC short track engines build by a top engine builder and both were 11:1 instead of 13:1 for race gas. I guess he did not want to have a problem if the owner put in a bad tune.
by pamotorman
Fri Apr 12, 2019 5:41 pm
Forum: Engine Tech
Topic: Is Blueprinting Worth Anything on an LS
Replies: 14
Views: 1155

Re: Is Blueprinting Worth Anything on an LS

don't the corvette engines make over 750 hp with a stock aluminum block and warranty for 36,000 miles.
by pamotorman
Thu Apr 04, 2019 11:24 am
Forum: Engine Tech
Topic: LS flat plane crank for street use?
Replies: 35
Views: 2000

Re: LS flat plane crank for street use?

someone ran a 180 flat crank BBC modified but it kept cracking the oil pan and the vibration put the drivers hands to sleep
by pamotorman
Tue Apr 02, 2019 9:43 am
Forum: Engine Tech
Topic: LS flat plane crank for street use?
Replies: 35
Views: 2000

Re: LS flat plane crank for street use?

back in the flat head ford days 180 degree cranks were used to fire 2 cylinders at one time for more torque
by pamotorman
Tue Apr 02, 2019 9:43 am
Forum: Engine Tech
Topic: LS flat plane crank for street use?
Replies: 35
Views: 2000

Re: LS flat plane crank for street use?

back in the flat head ford days 180 degree cranks were used to fire 2 cylinders at one time for more torque
by pamotorman
Sat Mar 23, 2019 11:48 am
Forum: Engine Tech
Topic: Dimpled... carburetor... venturi...
Replies: 7
Views: 884

Re: Dimpled... carburetor... venturi...

remember when bill Elliot was killing them in NASCAR they said it was dimpled piston tops and combustion chambers but it turned out to be the thunder bird body was just more aero friendly so GM brought out the lumina.
by pamotorman
Mon Mar 04, 2019 8:43 pm
Forum: Engine Tech
Topic: GM -140 “off road” cam
Replies: 46
Views: 3532

Re: GM -140 “off road” cam

I ran the 140 cam and springs with a varicam in my 68 Z/28 but kept breaking the vericam pig tail spring. it did help with street driving.