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  Topic: CB 650 Springs - Which Spring Compressor?
modok

Replies: 16
Views: 640

PostForum: Performance/Engines/Transmissions   Posted: Yesterday 7:56 pm   Subject: Re: CB 650 Springs - Which Spring Compressor?
I use a drill press

Yep, same. I made a wood angle plate.
I also like to use it to check spring travel.
Two in one
  Topic: .070" Barrel Shims
modok

Replies: 3
Views: 187

PostForum: Performance/Engines/Transmissions   Posted: Yesterday 4:38 pm   Subject: Re: .070" Barrel Shims
Stack .030 and .040 empi shims
The thicker the shim the worse it shears
  Topic: Help - backfire on deceleration - tried EVERTHING
modok

Replies: 34
Views: 1152

PostForum: Performance/Engines/Transmissions   Posted: Mon Sep 20, 2021 11:17 am   Subject: Re: Help - backfire on deceleration - tried EVERTHING
"Once again"?

It still seems like you don't understand.

That engines backfire on decel, UNLESS they have some means of preventing it.
  Topic: 1700-1800 engine build
modok

Replies: 20
Views: 792

PostForum: Performance/Engines/Transmissions   Posted: Sun Sep 19, 2021 6:17 pm   Subject: Re: 1700-1800 engine build
The aircooled.net stuff is for people who want a quick fix, and that's a large %

But YOU claim to know what your doing, if so
then I doubt you will LIKE
Thin slip in cylinders, crappy chinese co ...
  Topic: Crank snapped in two. Oil starvation or crank flaw?
modok

Replies: 33
Views: 1800

PostForum: Performance/Engines/Transmissions   Posted: Sun Sep 19, 2021 6:04 pm   Subject: Re: Crank snapped in two. Oil starvation or crank flaw?
"new" cranks are a better deal at the moment, YES, but

Keep in mind that it wasn't this way in the past, and the future is unknown.

There is a saying about
When things seem too goo ...
  Topic: old sig erson ratios 2.1???
modok

Replies: 11
Views: 486

PostForum: Performance/Engines/Transmissions   Posted: Sun Sep 19, 2021 2:51 pm   Subject: Re: old sig erson ratios 2.1???
Measure it like this, and you will find the intended ratio.
This is also wrong, but, it is more right.
How to measure the actual instantaneous ratio of a wrongly designed rocker might be another dis ...
  Topic: Help - backfire on deceleration - tried EVERTHING
modok

Replies: 34
Views: 1152

PostForum: Performance/Engines/Transmissions   Posted: Sun Sep 19, 2021 2:11 pm   Subject: Re: Help - backfire on deceleration - tried EVERTHING
It probably used to backfire less when there was no carbon buildup inside the exhaust system.
It is normal that exhaust systems develop a layer of carbon inside.
just as it is normal for this thing ...
  Topic: old sig erson ratios 2.1???
modok

Replies: 11
Views: 486

PostForum: Performance/Engines/Transmissions   Posted: Sun Sep 19, 2021 1:51 pm   Subject: Re: old sig erson ratios 2.1???
I can show how to measure rocker ratio if you would like.
I think it would be best to make an illustration.

"What did I do wrong" well, probably a few things but I don't know.

I had ...
  Topic: old sig erson ratios 2.1???
modok

Replies: 11
Views: 486

PostForum: Performance/Engines/Transmissions   Posted: Sat Sep 18, 2021 8:27 pm   Subject: Re: old sig erson ratios 2.1???
If I add you measurements... your rocker is about .300" too long.
  Topic: Crank snapped in two. Oil starvation or crank flaw?
modok

Replies: 33
Views: 1800

PostForum: Performance/Engines/Transmissions   Posted: Sat Sep 18, 2021 6:55 pm   Subject: Re: Crank snapped in two. Oil starvation or crank flaw?
It's a bit out of warranty, being some 30-40 years old Rolling Eyes

Offset grinding it "could" have brought a flaw to the surface that wasn't a problem before, something like that, but, I'd ju ...
  Topic: Cb's wide pushrod tubes question
modok

Replies: 5
Views: 462

PostForum: Performance/Engines/Transmissions   Posted: Tue Sep 14, 2021 5:22 pm   Subject: Re: Cb's wide pushrod tubes question
I tried to install some last year and found big end was a lot larger than it should used to be, and that didn't improve the fit. Seemed to bottom out on the metal before the seals were in full conta ...
  Topic: 92 /94 thick wall copper head gasket?
modok

Replies: 5
Views: 261

PostForum: Performance/Engines/Transmissions   Posted: Mon Sep 13, 2021 9:05 pm   Subject: Re: 92 /94 thick wall copper head gasket?
yeah there was a guy who made some. I don't see the add in the classifieds at the moment, so I guess he moved on to some other hobby.
  Topic: Sanity check: my Weber IDF's don't obey the installation manual
modok

Replies: 48
Views: 2061

PostForum: Performance/Engines/Transmissions   Posted: Mon Sep 13, 2021 7:58 pm   Subject: Re: Sanity check: my Weber IDF's don't obey the installation manual
Pre-set half a hole or bottom edge of the hole?....good question.
Whichever way works better, I don't think I have a preference.

In either case the idea is to set the throttle position on both... ...
  Topic: Holley Sniper Conversions.
modok

Replies: 70
Views: 3411

PostForum: Performance/Engines/Transmissions   Posted: Sun Sep 12, 2021 3:56 pm   Subject: Re: Holley Sniper Conversions.
25 at idle?
Sure,...with Low compression and massive exhaust contamination Shocked
  Topic: Yet another 1776 build thread (My Son's 1st car, a Baja)
modok

Replies: 22
Views: 781

PostForum: Performance/Engines/Transmissions   Posted: Sun Sep 12, 2021 3:52 pm   Subject: Re: Yet another 1776 build thread (My Son's 1st car, a Baja)
I would say....if ONLy a 1776
a CB cheater cam, or at most an engle 100, better yet something in the middle
8-1 compression, detailed stock heads with better springs, 8-dowel the flywheel, replace ...
  Topic: New Heads and 1.25 Rockers?
modok

Replies: 86
Views: 3519

PostForum: Performance/Engines/Transmissions   Posted: Sat Sep 11, 2021 9:46 pm   Subject: Re: New Heads and 1.25 Rockers?
Web 218 has about .420 lobe lift

Are you looking at a 218/119 split grind?
  Topic: Loose Empi intake tubes
modok

Replies: 14
Views: 441

PostForum: Performance/Engines/Transmissions   Posted: Sat Sep 11, 2021 6:47 pm   Subject: Re: Loose Empi intake tubes
It is possible to expand the tube slightly.
The same was that you can take apart a pushrod very easily
  Topic: Loose Empi intake tubes
modok

Replies: 14
Views: 441

PostForum: Performance/Engines/Transmissions   Posted: Sat Sep 11, 2021 3:07 pm   Subject: Re: Loose Empi intake tubes
no.. not -wicking threadlocker-

Green sleeve retainer, permatex 640

How loose is loose? .020+, is loose enough for epoxy but needs a very rough surface texture.

.001-.005" is a good ra ...
  Topic: Sanity check: my Weber IDF's don't obey the installation manual
modok

Replies: 48
Views: 2061

PostForum: Performance/Engines/Transmissions   Posted: Fri Sep 10, 2021 6:47 pm   Subject: Re: Sanity check: my Weber IDF's don't obey the installation manual
These things are not lab grade instruments,
and the instructions are not worth your time to follow.
The instructions are......kind of a fantasy of what should happen.

But I'd rather you not ...
  Topic: Guideline for compression
modok

Replies: 37
Views: 1761

PostForum: Performance/Engines/Transmissions   Posted: Wed Sep 08, 2021 4:33 pm   Subject: Re: Guideline for compression

Brian please can you explain the scenario of the 2.1 WBX with said lame ass hydraulic cam and 10.5 cr. They run great

Poor volumetric efficiency.

Unlikely as VW are not short of research and d ...
 
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