Search found 616 matches
- Sat Dec 12, 2020 7:57 pm
- Forum: Vintage/Classic/Historical Engine Tech
- Topic: Stock and hopped Z-28 engines here..
- Replies: 83
- Views: 16062
Re: Stock and hopped Z-28 engines here..
Been off and on watching this post. The "dog" 302 Z-28 in off the dealer showroom floor trim and tune was somewhat gutless, biggest problem was the cam. Once you changed to the "optional Z-28 off road" 140 cam and orange valve springs, good tubing headers, 4:88 rear gear and, the...
- Thu Nov 05, 2020 8:29 pm
- Forum: Engine Tech
- Topic: BBC Head Gaskets
- Replies: 3
- Views: 627
Re: BBC Head Gaskets
What compression ratio are you at and where do you want to go! The stock steel shim stuff was fine on factory 11:1 engines and more forever assuming well machined surfaces. The other alternative of course is milling the heads to increase compression ratio and using the presumed newer technology head...
- Thu Jul 23, 2020 1:36 pm
- Forum: Engine Tech
- Topic: Mystery
- Replies: 15
- Views: 2453
Re: Mystery
3 mph slower but 200 more rpm through traps? Car bogging slightly on launch? IMO two issues, convertor slippage and fuel control( jet extensions in rear bowl?)
- Wed Jun 10, 2020 8:56 am
- Forum: Engine Tech
- Topic: NHRA STOCK valve job
- Replies: 52
- Views: 6277
Re: NHRA STOCK valve job
Kenyonizing worked 50 years ago. Curious if thats legal.
- Fri Apr 24, 2020 11:27 pm
- Forum: Engine Tech
- Topic: Big Block Chevy Windage control-was this a waste of time?
- Replies: 13
- Views: 3577
Re: Big Block Chevy Windage control-was this a waste of time?
That is not a bad looking pan, with the trap doors and a good windage screen design. I did the additional rear drain back also after blocking off the valley drain slots. I did add some shorter breather piping with same idea as your stacks so I could utilize the GM snap in lifter gallery heat shield....
- Tue Mar 10, 2020 7:55 pm
- Forum: Valve Train
- Topic: Valve train control loss question
- Replies: 27
- Views: 8554
Re: Valve train control loss question
Poking around and just saw this post. Mike suggested the Isky springs, you have a couple inners broken, check for leak and change springs. Don't get lost in lots of other stuff until you do that and let us know what you find. Chancing a brutal mechanical disaster is a lot more potential money and ti...
- Sat Jan 11, 2020 10:19 pm
- Forum: Engine Tech
- Topic: 1400 hp Big Chevy combinations
- Replies: 93
- Views: 11745
Re: 1400 hp Big Chevy combinations
I'll bite. Is the budget number a misprint? I ask that because $6000 might get you a rotating assembly that would barely support that h.p. in a reliable fashion.
- Fri Nov 29, 2019 10:38 pm
- Forum: Engine Tech
- Topic: 4150 to 4500 Intake Conversion
- Replies: 13
- Views: 2033
Re: 4150 to 4500 Intake Conversion
I have a SBC intake made for the 4150 but I need to run a 4500, I have the 2" funnel adapter but I'd like to have a little more hood clearance so I'm wondering if a 1/2" or 3/4" flange plate welded to the top of the intake would work as well as the adapter. Which method would give th...
- Thu Nov 28, 2019 9:17 pm
- Forum: Engine Tech
- Topic: Oil drainback holes in pistons
- Replies: 9
- Views: 2369
Re: Oil drainback holes in pistons
50 years ago when I worked for a Chevy TransAm team as "engine monkey" Al Bartz supplied our best engines. When I freshened them the Venolia pistons had 12- .125" holes drilled just below the oil ring groove, 6 per thrust side at 45 degree angle. Of course oil ring tension was lower t...
- Sun Nov 24, 2019 4:47 pm
- Forum: Engine Tech
- Topic: Piston pin end clearance?
- Replies: 20
- Views: 2618
Re: Piston pin end clearance?
Of course too little end clearance can lead to problems with heat expansion etc. But too much end clearance can be an issue also when the pin acts as a battering ram due to rod and piston pin bore alignment irregularities. I've never had a failure in this area but everyone on this forum has certainl...
- Tue Oct 15, 2019 10:35 pm
- Forum: Engine Tech
- Topic: Under performing 357 sbc
- Replies: 33
- Views: 4176
Re: Under performing 357 sbc
You need to give more detail on the heads. If I had to put on a blindfold and make a guess I would suspect the heads are way underperforming to what the camshaft needs. Maybe this will get the ball rolling for you.
- Sat Jul 06, 2019 10:49 am
- Forum: Engine Tech
- Topic: Mild performance build of my original 327 for my 1964 Corvette
- Replies: 52
- Views: 5229
Re: Mild performance build of my original 327 for my 1964 Corvette
With your initial plan seems very close to the 340 hp 62-63 vette engines of that era. With 2.02 and 1.6 valves your near the 365 hp engine but down slightly in compression ratio. Totally agree that a mild flat tappet, similar to the 30-30 but less duration will surprise you but be very reliable.
- Wed Jul 03, 2019 8:23 pm
- Forum: Engine Tech
- Topic: Block grout
- Replies: 9
- Views: 1696
Re: Block grout
Non catalyzing machinist grout. Cheap and easy.
- Wed Jul 03, 2019 8:18 pm
- Forum: Engine Tech
- Topic: 327 help
- Replies: 45
- Views: 4299
Re: 327 help
Sounds like plugged or restricted exhaust system. Should be easy enough to drop exhaust and check it then.
- Sat Jun 29, 2019 11:02 am
- Forum: Engine Tech
- Topic: Spring Tester that made life easier
- Replies: 31
- Views: 4250
Re: Spring Tester that made life easier
Curious. For many years I have prestressed new valve springs then rechecked and then installed. Is that anything you find worthwhile?