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Search found 1832 matches

by CGT
Wed Jan 22, 2020 3:58 pm
Forum: Engine Tech
Topic: Compression
Replies: 50
Views: 1832

Re: Compression

OK one more time checking. @ .300" 70cc 4.135" x 3.75" .010" in the hole .030" x 4.160" Cometic head gasket Do you have a leak? :D Did you figure out where your inconsistency is coming from? I know it can be deceiving from pics, but from looking at the pics its hard to believe that piston doesn't h...
by CGT
Wed Jan 22, 2020 11:32 am
Forum: Engine Tech
Topic: Compression
Replies: 50
Views: 1832

Re: Compression

af2 wrote:
Wed Jan 22, 2020 11:24 am
OK one more time checking.
@ .300" 70cc

4.135" x 3.75"

.010" in the hole

.030" x 4.160" Cometic head gasket
Well, that's coming up to 4cc of dome volume roughly the other way. So that changes things :lol:
by CGT
Wed Jan 22, 2020 10:12 am
Forum: Engine Tech
Topic: Compression
Replies: 50
Views: 1832

Re: Compression

Eh....why is this any different than running 25 psi of boost? You beat me to it. I was thinking the same thing. Mag, have you failed a sbc at or because of 17:1 compression lol?...There is literally stuff out there with 15:1 and a couple atmospheres on top of it...and that just the stuff I've heard...
by CGT
Tue Jan 21, 2020 9:31 pm
Forum: Engine Tech
Topic: Compression
Replies: 50
Views: 1832

Re: Compression

Assuming ....0 deck with your .040 gasket. 75cc's at .375 down comes out to 7.4 dome volume. I get 18.3:1..unless I'm missing or not reading something correctly. Thats why am asking? The dome volume was to be 3 cc???? Had to cut a bunch off to limit head contact now doing the measuring I see more.....
by CGT
Tue Jan 21, 2020 8:56 pm
Forum: Engine Tech
Topic: Compression
Replies: 50
Views: 1832

Re: Compression

Assuming ....0 deck with your .040 gasket. 75cc's at .375 down comes out to 7.4 dome volume. I get 18.3:1..unless I'm missing or not reading something correctly.
by CGT
Mon Jan 20, 2020 9:19 am
Forum: Engine Tech
Topic: cam suggestions for 355
Replies: 17
Views: 1034

Re: cam suggestions for 355

1.7 ratio in a sbc is not worth the expense in my book for the small gains. Read a little here about it. That's a generic statement if I ever heard one. I guess that thread is somehow proof to never put a 1.7 rocker on a sbc.. :D I remember one time I lent a friend a set of higher ratio rockers to ...
by CGT
Fri Jan 17, 2020 12:18 pm
Forum: Engine Tech
Topic: Cloyes Hex A Just
Replies: 7
Views: 530

Re: Cloyes Hex A Just

I've never broken one, using the method previous people mentioned and I've used tham quite a bit.. But I've heard of people breaking them a lot...so Im assuming they probably just tried moving the eccentric vs moving the crankshaft. I can see that breaking really easily that way.
by CGT
Wed Jan 15, 2020 12:39 pm
Forum: Engine Tech
Topic: Measuring for pushrods...part deux
Replies: 46
Views: 1169

Re: Measuring for pushrods...part deux

After doing the checks and adjustments to where I’m satisfied with the geometry, I measure the checking pushrod and add however much lifter preload I want to the observed length. That's how I've always done it as well. If the valvetrain is adjustable, and someone is really hung up on pushrod length...
by CGT
Wed Jan 15, 2020 11:59 am
Forum: Engine Tech
Topic: Sbc 400 vs 415 vs 427?
Replies: 37
Views: 1577

Re: Sbc 400 vs 415 vs 427?

Un-lightened 65 Malibu SS. I got one of those too. Got any pics of yours? But I am curious if I would be losing much by sticking to the 3.75” stroke vs the 3.875”. The engine posted makes 1.35 tq per cube, pretty typical result for those kind of parts. That's gonna follow the difference in cubes pr...
by CGT
Tue Jan 14, 2020 4:31 pm
Forum: Engine Tech
Topic: 6.0 chevy 2500 trk engine oil cooler bypass
Replies: 5
Views: 249

Re: 6.0 chevy 2500 trk engine oil cooler bypass

12577903(Cover) 12611384(gasket) Qty. 2 11588714(Bolt)
by CGT
Tue Jan 14, 2020 8:44 am
Forum: Engine Tech
Topic: Measuring for pushrods...part deux
Replies: 46
Views: 1169

Re: Measuring for pushrods...part deux

Rockers can be all over the place in terms of ratio. Be happy yours off to the good. Maybe try checking the ratio at some points other than max lift....see if you find anything interesting.
by CGT
Fri Jan 10, 2020 4:09 pm
Forum: Engine Tech
Topic: Engine swap ideas for a 1979 Mercedes 240D
Replies: 85
Views: 2301

Re: Engine swap ideas for a 1979 Mercedes 240D

2.2-2.4L GM Ecotec, good engine, good power, plentiful. Good availability of parts...
by CGT
Thu Jan 09, 2020 4:44 pm
Forum: Engine Tech
Topic: Camshaft questions for 434 with small heads
Replies: 23
Views: 1195

Re: Camshaft questions for 434 with small heads

Yes i know they make a sb flat tappet camshafts, but i don't think that an iron noodle camshaft is such a great idea for longevity but i might be wrong there. Ive used them with no issues, but I no longer use flat tappet cams period. They just aren't worth the potential damage to all the hard work ...
by CGT
Thu Jan 09, 2020 4:41 pm
Forum: Engine Tech
Topic: Gains with lift beyond the point of max airflow?
Replies: 25
Views: 1278

Re: Gains with lift beyond the point of max airflow?

interesting information from camking but my question is it possible to have reversion issues at IVC?? Absolutely..the piston is going the wrong direction. Increased rpm, displacement, or anti-reversion methods can allow a later one(ivc) before that point occurs...valve size, dc, seat angle etc are ...
by CGT
Thu Jan 09, 2020 4:35 pm
Forum: Engine Tech
Topic: Camshaft questions for 434 with small heads
Replies: 23
Views: 1195

Re: Camshaft questions for 434 with small heads

I understand. I mentioned the redline because i want to go to the drag strip on occasion, but since this is primarily a street car good manners, reliability and the fact itmust be able to run on 91 octane pump gas are very important factors of this build. Much more important than maximum horsepower...