Corvair DiagramCorvair Photo
Corvair Center
home forum corvairs calendar links Corvair Podcast
California Corvairs
Clarks Corvair
Clarks Corvair
“Performance
“CORSA"



Chevy Corvair License Plate
Chevy Corvair Chrome Wheel
Corvair Center Forum :  Corvair Center Phorum The fastest message board... ever.
Corvair Center 
Current Page: 3 of 16
Re: Corvair Engine in a '73 vw bug!!
Posted by: TroyWidtfeldt ()
Date: September 29, 2017 09:24AM

Do you think it'll be fine without the the front air shrouds, i dont have them, like the sheetmetal to the sides of the front cover? And under the oil cooler. Im guessing my uncle just ran it without the extra sheetmetal, he made some sheetmetal shrouds for the back, as you can see in some of the pics.

Reccommendations?

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: TroyWidtfeldt ()
Date: September 29, 2017 09:53AM

Wondering, do i need the pcv valve on my engine? I have a pcv breather filter from mikes corvair parts, as long as no crap gets in the engine its fine right? So what about pollution and crap. What would i need if it do?

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: MattNall ()
Date: September 29, 2017 10:18AM

Engine compartment sheetmetal pieces...

Troy, you just have to make sure no HOT air from UNDER the engine recirculates back to the fan.... plain and simple...

As far as the Crankcase Ventilation....


1 Your state's requirements

2 THE AMOUNT OF BLOWBY YOU HAVE and what it takes to contain it...and keep your engine clean..





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: TroyWidtfeldt ()
Date: September 30, 2017 06:56AM

i have a breather filter that goes over the vent tube, figure that should keep crap out and let pressure out.
Should be fine right?

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: MattNall ()
Date: September 30, 2017 07:45AM

Time will tell after you start driving it!





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: TroyWidtfeldt ()
Date: October 09, 2017 05:49PM

Very true,
do you think i should run a wastegate and blow off valve since im running 95 heads off a 62 corvair.

There will be increased compression

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: MattNall ()
Date: October 09, 2017 05:53PM

Try driving it first!!





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: TroyWidtfeldt ()
Date: October 09, 2017 06:07PM

yes except i dont really want to blow it up right after i start it for the first time. I already put too much money and effort into it for that to happen.

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: gnvair ()
Date: October 09, 2017 06:31PM

TroyWidtfeldt Wrote:
-------------------------------------------------------
> Very true,
> do you think i should run a wastegate and blow off
> valve since im running 95 heads off a 62 corvair.
>
> There will be increased compression


You can't run a blow off valve with a draw through carburetor set up.
If you are running a stock carb there is really no reason for a waste gate.
Once you get away from the stock carb then you would want to consider it.
95 heads will not make any additional boost. The only difference would be the resistance to pinging because of the closed chamber providing a squish area.

Lee J

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: TroyWidtfeldt ()
Date: October 10, 2017 06:48AM

Ok so its better than to run stock heads, because less pinging? Run a blowoff valve to a metal (sealed) pipe to the exhaust, so every time you shift it blows flames.smileys with beersmileys with beer

increased compression will lead to pinging unless i run higher octane gas.

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: gnvair ()
Date: October 10, 2017 07:58AM

TroyWidtfeldt Wrote:
-------------------------------------------------------
> Ok so its better than to run stock heads, because
> less pinging? Run a blowoff valve to a metal
> (sealed) pipe to the exhaust, so every time you
> shift it blows flames.smileys with beersmileys with beer
>
> increased compression will lead to pinging unless
> i run higher octane gas.


Stock heads work. The reason why you see people using 95 horse or similar heads is because of the closed chamber/squish area (that 64-66 turbo and smog heads lack) that is more resistant to pinging. There typically is no change in compression ratio.

Lee J

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: TroyWidtfeldt ()
Date: October 10, 2017 11:32AM

Like the step up in the heads around the valves, is that what your referring to as a squish area?

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: MattNall ()
Date: October 10, 2017 11:42AM

Correct!! That is the "Squish" area.... Closer to 0.040" to top of piston... the less chance of ping!





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: ROD ()
Date: October 10, 2017 12:28PM

Quench area .... that is where squish occurs

Rod Tetrault
El Cajon , CA
65 Corsa Yenko Clone / 65 Corsa EO Creampuff Vert
66 Corsa "JIMISH" Mid engine Turbo LS1 currently 2nd fastest Corvair in the USA
Class 5 Corvair powered Baja
61 Vintage Rampy
Corvair powered Buggy x 3
Enough hidden parts to build a space ship

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: TroyWidtfeldt ()
Date: October 11, 2017 05:30AM

So 95 heads are better than stock for that purpose?

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: MattNall ()
Date: October 11, 2017 08:23AM

Correct!





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: TroyWidtfeldt ()
Date: October 11, 2017 08:36AM

Since this basically removes the risk of pinging, how do i make sure that the heads don't have higher compression? I thought they would because they have the step up in the valve chamber. Are 95 heads strong enough to be able to take the boost from a turbo stock, from a corsa? If not what do i do? Basically i want to drive it now but i cannot because i'm waiting on some parts to come, gaskets, pistons, and choke lines for turbo.

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: MattNall ()
Date: October 11, 2017 11:44AM

The Step does not remove... it just "lessens the "likelyhood"

When assembling the engine

Put the head on with no gaskets

Use modeler's Clay or BeesWax to measure the gap... make sure to put a little oil/ grease on the head's surface to it won't stich..

When you get that done... let us knowwhat you found.





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: TroyWidtfeldt ()
Date: October 12, 2017 05:22AM

Let you know what?
How thick/thin the gap is?

Options: ReplyQuote
Re: Corvair Engine in a '73 vw bug!!
Posted by: MattNall ()
Date: October 12, 2017 07:52AM

Correct!





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

Options: ReplyQuote
Current Page: 3 of 16


Sorry, only registered users may post in this forum.
This forum powered by Phorum.