Scotts Yellow Supercharged V6 Roadster

[s12vea]

Quality workmanship
Could of been nasty

[1979scotte]

Quality workmanship
Could of been nasty

Especially with the fuel leak i had early in the year that finally put me off driving her.

Standing in a puddle of super unleaded holding jump leads isn't an ideal situation.

[s12vea]

Worth having everything checked before you start driving it again, for peace of mind

[Ardent]

Standing in a puddle of super unleaded holding jump leads isn't an ideal situation.

That's Funny. But, not funny at all.

[StuC]

Standing in a puddle of super unleaded holding jump leads isn't an ideal situation.

That's Funny. But, not funny at all.

More an ode to comedy of errors? 😬

[1979scotte]

Car now with auntie Carolyn.

She believes that the slight fluid leak I've had for a while is the clutch master cylinder.

Which would make sense as you barley find a gear atm.

Thats is all.

[1979scotte]

After spending over 200 miles in a stock engine roadster I find myself wondering what my reasons were for starting down this path.

I'm really starting to believe that toyota got it right with the TTE turbo. Just that bit of extra torque where you need it.

Similarly a car such as @Carolyn supercharged example or @Topdownman 1mz swap would hit the sweet spot.

Kinda wish I hadn't had the compression ratio lowered on my V6 now. Would have been very pleasant just NA. Shame I didn't know a coil pack was blown and I was only running on 5 cylinders. Never have a crystal ball when you need one.

[Ardent]

After spending over 200 miles in a stock engine roadster I find myself wondering what my reasons were for starting down this path.

I'm really starting to believe that toyota got it right with the TTE turbo. Just that bit of extra torque where you need it.

Similarly a car such as @Carolyn supercharged example or @Topdownman 1mz swap would hit the sweet spot.

Kinda wish I hadn't had the compression ratio lowered on my V6 now. Would have been very pleasant just NA. Shame I didn't know a coil pack was blown and I was only running on 5 cylinders. Never have a crystal ball when you need one.

Having read that.
I find myself feeling both happy and sad at the same time.
I once had a school report. A for effort. E for attainment.

Which is a precursor to what follows.
My knowledge is still pretty much E. But my sincerity is always A.
How difficult/expensive would it be, to Un-lower the compression ratio?

[1979scotte]

After spending over 200 miles in a stock engine roadster I find myself wondering what my reasons were for starting down this path.

I'm really starting to believe that toyota got it right with the TTE turbo. Just that bit of extra torque where you need it.

Similarly a car such as @Carolyn supercharged example or @Topdownman 1mz swap would hit the sweet spot.

Kinda wish I hadn't had the compression ratio lowered on my V6 now. Would have been very pleasant just NA. Shame I didn't know a coil pack was blown and I was only running on 5 cylinders. Never have a crystal ball when you need one.

Having read that.
I find myself feeling both happy and sad at the same time.
I once had a school report. A for effort. E for attainment.

Which is a precursor to what follows.
My knowledge is still pretty much E. But my sincerity is always A.
How difficult/expensive would it be, to Un-lower the compression ratio?

Buy a new head in the case of a V6 buy 2. They've been fully rebuilt port and polish aswell seems like throwing good money after bad.

[Ardent]

For some unknown reason I thought it was done by swapping pistons.

[1979scotte]

For some unknown reason I thought it was done by swapping pistons.

That's the usual way.
This is cheaper.
Pistons on their own would have been £1000++ totally custom job.

[Topdownman]

Doesnt each coilpack run 2 cylinders?

[1979scotte]

Doesnt each coilpack run 2 cylinders?

Not on mine its not wasted spark is coil on plug.
One of the benefits of stand alone ecu. Much easier to tune.

[thetyrant]

How difficult/expensive would it be, to Un-lower the compression ratio?

Buy a new head in the case of a V6 buy 2. They've been fully rebuilt port and polish aswell seems like throwing good money after bad.

Intrigued in what was done to heads on the V6 to lower compression ratio and by how much ?  usually its different  pistons or a head spacer used for this so im curious what was done for your car to achieve the drop

[1979scotte]

How difficult/expensive would it be, to Un-lower the compression ratio?

Buy a new head in the case of a V6 buy 2. They've been fully rebuilt port and polish aswell seems like throwing good money after bad.

Intrigued in what was done to heads on the V6 to lower compression ratio and by how much ?  usually its different  pistons or a head spacer used for this so im curious what was done for your car to achieve the drop

You can machine the combustion chamber. Old school. I'd never come across it but was told its a thing.

[StuC]

After spending over 200 miles in a stock engine roadster I find myself wondering what my reasons were for starting down this path.

I'm really starting to believe that toyota got it right with the TTE turbo. Just that bit of extra torque where you need it.

Similarly a car such as @Carolyn supercharged example or @Topdownman 1mz swap would hit the sweet spot.

Kinda wish I hadn't had the compression ratio lowered on my V6 now. Would have been very pleasant just NA. Shame I didn't know a coil pack was blown and I was only running on 5 cylinders. Never have a crystal ball when you need one.

Perhaps you felt after a turbo, that you could push the torque envelope.

To be fair to you, the information you were given about the car, it's condition and it's possibilities was not the best.
Ultimately I think you ended up almost having to fire fight to get any kind of result. Additionally your patience was also pushed beyond your limits.

For one, I still believe that Bee can be truly awesome. 👍👍
I would hate to see her go to the scrapper.

[Joesson]

How difficult/expensive would it be, to Un-lower the compression ratio?

Buy a new head in the case of a V6 buy 2. They've been fully rebuilt port and polish aswell seems like throwing good money after bad.

Intrigued in what was done to heads on the V6 to lower compression ratio and by how much ?  usually its different  pistons or a head spacer used for this so im curious what was done for your car to achieve the drop

You can machine the combustion chamber. Old school. I'd never come across it but was told its a thing.

My early recollections in that respect were of cleaning the head chambers and ports and equalising their sizes. Often cast iron heads and they were not as accurately cast as aluminium alloy heads are today. The heads were then typically skimmed which tending to balance out the material cleaned out but generally higher compression was what was sought. Iirc thinner head gaskets were sometimes used.

[thetyrant]

You can machine the combustion chamber. Old school. I'd never come across it but was told its a thing.

I did spot some pics further back in thread after i posted of a head which was after machining i presume, looks like there was room to make some more capacity in the head and drop the CR, downside is reduced response and efficiency due to messing up the squish as well as lowering CR, i suppose you could get the heads welded and machined to put it back in but its a lot of effort and £££ to do right,  if it works ok as is then no need to meddle and at least its safe for boost, you could maybe get a couple of small turbos on there instead of the Rotrex that would make it mega 

[1979scotte]

How difficult/expensive would it be, to Un-lower the compression ratio?

Buy a new head in the case of a V6 buy 2. They've been fully rebuilt port and polish aswell seems like throwing good money after bad.

Intrigued in what was done to heads on the V6 to lower compression ratio and by how much ?  usually its different  pistons or a head spacer used for this so im curious what was done for your car to achieve the drop

You can machine the combustion chamber. Old school. I'd never come across it but was told its a thing.

My early recollections in that respect were of cleaning the head chambers and ports and equalising their sizes. Often cast iron heads and they were not as accurately cast as aluminium alloy heads are today. The heads were then typically skimmed which tending to balance out the material cleaned out but generally higher compression was what was sought. Iirc thinner head gaskets were sometimes used.

With forced induction lower compression gives you more knock protection.
Possibly unnecessary with modern ecu and wideband sensors but prudent on an unforged engine.

[1979scotte]

You can machine the combustion chamber. Old school. I'd never come across it but was told its a thing.

I did spot some pics further back in thread after i posted of a head which was after machining i presume, looks like there was room to make some more capacity in the head and drop the CR, downside is reduced response and efficiency due to messing up the squish as well as lowering CR, i suppose you could get the heads welded and machined to put it back in but its a lot of effort and £££ to do right,  if it works ok as is then no need to meddle and at least its safe for boost, you could maybe get a couple of small turbos on there instead of the Rotrex that would make it mega 

Fitting anything in that bay is a nightmare.
Wanted to try rotrex done turbos before.

[Joesson]

How difficult/expensive would it be, to Un-lower the compression ratio?

Buy a new head in the case of a V6 buy 2. They've been fully rebuilt port and polish aswell seems like throwing good money after bad.

Intrigued in what was done to heads on the V6 to lower compression ratio and by how much ?  usually its different  pistons or a head spacer used for this so im curious what was done for your car to achieve the drop

You can machine the combustion chamber. Old school. I'd never come across it but was told its a thing.

My early recollections in that respect were of cleaning the head chambers and ports and equalising their sizes. Often cast iron heads and they were not as accurately cast as aluminium alloy heads are today. The heads were then typically skimmed which tending to balance out the material cleaned out but generally higher compression was what was sought. Iirc thinner head gaskets were sometimes used.

With forced induction lower compression gives you more knock protection.
Possibly unnecessary with modern ecu and wideband sensors but prudent on an unforged engine.

"Take it in top" is my earliest recollection of after market advertising for Shorrocks  turbo chargers.
PS. That was referring to a ( Ford) Anglia iirc.

[1979scotte]

New idler pulley mount

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Bumper off

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And fitted

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Bloody hard work too that was really got a sweat on 😜

@Carolyn

[shnazzle]

Can't think of a better place for the car to be

[tomaky]

Great to see it being logically thought through!

[househead]

Can't think of a better place for the car to be

There is only one other ...

In full working order being driven at ten tenths on a perfect twisty B road in good conditions.

Until then, it is probably the best place it can be!