BHP increase to a 1972 V4 96

Re: BHP increase to a 1972 V4 96

I'd suggest telling them it is less than 10%.  There is data to
suggest that this is likely...

According to factory specifications, when the 96 came fitted with a
twin choke Solex in 1977 it raised the HP from 65 to 68 (and improved
fuel mileage!).

The Jetex exhaust can be considered a stock replacement as it retains
the same number of mufflers (a primary muffler and a rear resonator).
The additional diameter (up to 2" from whatever is stock, 1.75"?) is
probably only going to make a difference of a HP or two unless the
heads have been ported.

On Mon, Feb 2, 2009 at 12:04 PM, Jonathan Hopper
<jonathanhopper@...> wrote:
> I have fitted the following to my UK model 1972 96 (65 BHP) and need to tell
> the Insurance company how much BHP it will have increased the power by:
>
> Weber 28/36 DCD (& airfilter)
> Twin choke Manifold
> Jetex sport exhaust
>
> (They said they are only bothered if it is more than 10%)
>
> Anyone have any data on this?
>
> thanks
>
> Jonathan
>
> 

--

-- 
-STEFAN
http://www.at-speed.com
http://photos.at-speed.com
VSCCA comp #374
VRG comp #97

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Flywheel questions

Re: BHP increase to a 1972 V4 96

Stefan Vapaa wrote:
> The Jetex exhaust can be considered a stock replacement as it retains
> the same number of mufflers (a primary muffler and a rear resonator).
> The additional diameter (up to 2" from whatever is stock, 1.75"?) is
> probably only going to make a difference of a HP or two unless the
> heads have been ported.

Two mufflers on the stock system? That front one is just an echo 
chamber/collector tube. There isn't any baffling in the tube to which 
the header pipes are connected. Those two cans that surround the joint 
don't do any muffling. I've had systems where the cans rusted out around 
the headers, and when you pull the pipe out and inspect it, the header 
passes through the can without any holes in it by which exhaust gets 
into the can and bounces around.

Andy in PDX OR

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Re: BHP increase to a 1972 V4 96

Jonathan Hopper wrote:
> I have fitted the following to my UK model 1972 96 (65 BHP) and need to 
> tell the Insurance company how much BHP it will have increased the power by:
> 
> Weber 28/36 DCD (& airfilter)
> Twin choke Manifold
> Jetex sport exhaust
> 
> (They said they are only bothered if it is more than 10%)
> 
> Anyone have any data on this?

Considering that your old engine probably didn't have 65 bhp when you 
started this project, those parts should make quite an improvement.

Andy in PDX OR

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Wheel truing stand..

Ok,  I am planning on getting a set of my Sonett wheels "prettied up"  
and it occurred to me that I should check to see which wheels are the  
straightest to start with which means building a jig to test runout  
etc. on SAAB steel wheels.. well, it would work on any 5 bolt wheel I  
guess but I digress..  has anyone done this before?  Is there anything  
more complicated than taking an upright and mounting it in a sturdy  
vise and putting a dial gauge to the wheel ala the factory manual?

Ok, it's not a truing stand but a wheel true check stand??

Thanks all,

Lester

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Re: Wheel truing stand..

More complex than you may think, what really ovals is the inside disc 
to the rim, tough to see without a high-speed spin.

At 01:15 PM 2/3/2009, you wrote:

>Ok,  I am planning on getting a set of my Sonett wheels "prettied up"
>and it occurred to me that I should check to see which wheels are the
>straightest to start with which means building a jig to test runout
>etc. on SAAB steel wheels.. well, it would work on any 5 bolt wheel I
>guess but I digress..  has anyone done this before?  Is there anything
>more complicated than taking an upright and mounting it in a sturdy
>vise and putting a dial gauge to the wheel ala the factory manual?
>
>Ok, it's not a truing stand but a wheel true check stand??
>
>Thanks all,
>
>Lester
>

_________________________________
Cheers-

William "Chip" Lamb
West of Sweden SAAB
Richmond, VA.
http://www.wmsbrg.com/sweden/
__________________________________

------------------------------------

Re: Wheel truing stand..

But that would be measured on the micrometer when one does the  
measurement of the inside lip (Tire off of course).  I recall the  
factory manual has two parameters to measure, runout and uhh..  
whatever the other one is called.  Measured at the lip below where the  
bead is held on the outside of the wheel and the other one measured on  
the inside of the wheel just above where the disc is attached.  The  
end result is that you get readings at 90 degrees to each other.

Lester

On Feb 3, 2009, at 12:21 PM, William 'Chip' Lamb wrote:

> More complex than you may think, what really ovals is the inside disc
> to the rim, tough to see without a high-speed spin.
>
> At 01:15 PM 2/3/2009, you wrote:
>
>
>> Ok,  I am planning on getting a set of my Sonett wheels "prettied up"
>> and it occurred to me that I should check to see which wheels are the
>> straightest to start with which means building a jig to test runout
>> etc. on SAAB steel wheels.. well, it would work on any 5 bolt wheel I
>> guess but I digress..  has anyone done this before?  Is there  
>> anything
>> more complicated than taking an upright and mounting it in a sturdy
>> vise and putting a dial gauge to the wheel ala the factory manual?
>>
>> Ok, it's not a truing stand but a wheel true check stand??
>>
>> Thanks all,
>>
>> Lester
>>
>
> _________________________________
> Cheers-
>
> William "Chip" Lamb
> West of Sweden SAAB
> Richmond, VA.
> http://www.wmsbrg.com/sweden/

------------------------------------

Re: Flywheel questions

Re: Wheel truing stand..

..ahem, where I wrote micrometer please insert dial gauge...

Lester

On Feb 3, 2009, at 12:36 PM, Lester wrote:

> But that would be measured on the micrometer when one does the
> measurement of the inside lip (Tire off of course).  I recall the
> factory manual has two parameters to measure, runout and uhh..
> whatever the other one is called.  Measured at the lip below where the
> bead is held on the outside of the wheel and the other one measured on
> the inside of the wheel just above where the disc is attached.  The
> end result is that you get readings at 90 degrees to each other.
>
> Lester
>
>
> On Feb 3, 2009, at 12:21 PM, William 'Chip' Lamb wrote:
>
>> More complex than you may think, what really ovals is the inside disc
>> to the rim, tough to see without a high-speed spin.
>>
>> At 01:15 PM 2/3/2009, you wrote:
>>
>>
>>> Ok,  I am planning on getting a set of my Sonett wheels "prettied  
>>> up"
>>> and it occurred to me that I should check to see which wheels are  
>>> the
>>> straightest to start with which means building a jig to test runout
>>> etc. on SAAB steel wheels.. well, it would work on any 5 bolt  
>>> wheel I
>>> guess but I digress..  has anyone done this before?  Is there
>>> anything
>>> more complicated than taking an upright and mounting it in a sturdy
>>> vise and putting a dial gauge to the wheel ala the factory manual?
>>>
>>> Ok, it's not a truing stand but a wheel true check stand??
>>>
>>> Thanks all,
>>>
>>> Lester
>>>
>>
>> _________________________________
>> Cheers-
>>
>> William "Chip" Lamb
>> West of Sweden SAAB
>> Richmond, VA.
>> http://www.wmsbrg.com/sweden/
>
> ------------------------------------
>
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>
>
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