Just for interest's sake - Weslake SB Chevy 4-valve heads

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flyingwedge
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Re: Just for interest's sake - Weslake SB Chevy 4-valve head

Post by flyingwedge » Fri May 16, 2014 1:03 pm

The motor, that begs to be built, is the rover V8 with lotus 907 heads,(same bore spacing). 907 heads are easy to get via Jensen Healey. Major obstacle is getting 4 custom/round lobe cams made or a single-plane crank. Costly proposition, either way. flyingwedge. :(

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Re: Just for interest's sake - Weslake SB Chevy 4-valve head

Post by lada ok » Fri May 16, 2014 6:11 pm

flyingwedge wrote:The motor, that begs to be built, is the rover V8 with lotus 907 heads,(same bore spacing). 907 heads are easy to get via Jensen Healey. Major obstacle is getting 4 custom/round lobe cams made or a single-plane crank. Costly proposition, either way. flyingwedge. :(
Being that the ROVER alloy V8 is almost the same as the BUICK / OLDS F85 block how about a set of REPCO - BRABHAM cyl heads .... mind you, you will have to use a flat plane crank or alter the cams these were 2 valve heads intake 41.3mm ex 34.9mm the engine weighed 300 lb and produced 298 bhp @ 7500

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Re: Just for interest's sake - Weslake SB Chevy 4-valve head

Post by Ron E » Fri May 16, 2014 10:42 pm

Warpspeed wrote: But how about some of the Japanese DOHC four valve V8s ?
Now used in many SUVs there are enough of them around and they are not expensive, and many go faster bits are available from Japan.
Good point.I drove a Toyota Tundra the other day. 4 door, 4x4, etc. It was strong for a 5.7 at over 5000 lbs. It would be impressive at 2800 lbs.

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Re: Just for interest's sake - Weslake SB Chevy 4-valve head

Post by flyingwedge » Mon May 19, 2014 11:28 am

Ron E wrote:
Warpspeed wrote: But how about some of the Japanese DOHC four valve V8s ?
Now used in many SUVs there are enough of them around and they are not expensive, and many go faster bits are available from Japan.
Good point.I drove a Toyota Tundra the other day. 4 door, 4x4, etc. It was strong for a 5.7 at over 5000 lbs. It would be impressive at 2800 lbs.
>> Nice concept, but what is the bore spacing ? Not exactly horsehoes here. We need a lil' better than "close". Rover/sbb is 4.240". Then we'll need a crank, to handle all that impressive power. Cheers, flyingwedge. [-o<

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Re: Just for interest's sake - Weslake SB Chevy 4-valve head

Post by Warpspeed » Mon May 19, 2014 6:44 pm

flyingwedge wrote:Then we'll need a crank, to handle all that impressive power.
Cheers, flyingwedge. [-o<
The Toyota DOHC four valve V8 engines actually come with the crank already installed.
Made of forged steel too.
Cheers, Tony.

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Re: Just for interest's sake - Weslake SB Chevy 4-valve head

Post by lada ok » Mon May 19, 2014 6:49 pm

and they have been pist - on too !

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Re: Just for interest's sake - Weslake SB Chevy 4-valve head

Post by wyrmrider » Mon May 19, 2014 8:34 pm

I'm going to trade my Toyota HalfTundra in for a 3/4 Tundra.

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Re: Just for interest's sake - Weslake SB Chevy 4-valve head

Post by Kenova » Mon May 19, 2014 10:09 pm

lada ok wrote:and they have been pist - on too !
:-k
Is this a good thing or bad?

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Retaining it is the hard part.

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Re: Just for interest's sake - Weslake SB Chevy 4-valve head

Post by Warpspeed » Mon May 19, 2014 10:17 pm

Kenova wrote:
lada ok wrote:and they have been pist - on too !
:-k
Is this a good thing or bad?

Ken
It very good have pissed on, joined to con rod, what make engine go.
Cheers, Tony.

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Re: Just for interest's sake - Weslake SB Chevy 4-valve head

Post by pdq67 » Tue May 20, 2014 10:54 pm

Off topic but not really.

Anybody remember the AERO BBC 4-valve pushrod heads that had the short cross ways pushrod and bell-crank that actuated the exhaust valves??

pdq67

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Re: Just for interest's sake - Weslake SB Chevy 4-valve head

Post by boss » Mon Jul 07, 2014 12:08 am

anyone here know if Weslake ever got a patent on his 32v heads???

Image

i dont get how arao managed to get one concidering his is based off of the weslakes.
Last edited by boss on Mon Jul 07, 2014 12:37 am, edited 1 time in total.

boss
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Re: Just for interest's sake - Weslake SB Chevy 4-valve head

Post by boss » Mon Jul 07, 2014 12:29 am

pdq67 wrote:
Anybody remember the AERO BBC 4-valve pushrod heads that had the short cross ways pushrod and bell-crank that actuated the exhaust valves??

pdq67
those were not araos, they are 32v valleyheads

http://www.valleyhead.com/thunder.html
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ford also made a simular 5.0L setup back in the early 90's
Image

arias also used a simular idler pushrod on there 2v bbc hemi
Image

Larry Salisbury
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Re: Just for interest's sake - Weslake SB Chevy 4-valve head

Post by Larry Salisbury » Tue Jul 22, 2014 3:48 pm

Those of you who are familiar with Arias Hemi's will love what he has done for the LS motors. Here's a shot of an Arias Hemi LSX build I did for Nick Arias. Heads are 71cc shallow chamber hemis. Flows 400+ As with these types of configurations the push rod angles are extreme. These heads are huge.

Larry

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Re: Just for interest's sake - Weslake SB Chevy 4-valve head

Post by boss » Tue Jul 22, 2014 4:58 pm

neat pic, rocker assemblys look decent. I understand on the arias sbf conversion you have to get a custom ls style cam cut for the sbf to use them, dont know if that would effect/limit power?.

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Re: Just for interest's sake - Weslake SB Chevy 4-valve head

Post by boss » Tue Jul 22, 2014 5:18 pm

few more 32V weslake pics.

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