Renault Laguna 1.8 SOHC.  Does anyone know the factory quoted power output
of these engines?  What is the redline officially?  My rev counter goes up
to 7000 but methinks it might go terminal around that.

It starts to pull at 4000 and then "comes on cam" at 5000 and revs to
6000 quite freely. I don't want to over rev it as I've already had to do a
head gasket due to a faulty thermostat and don't want to do that or
similar again!

"gazzafield" <rufty_tufty_hoolythug@nospam.thankyou.says_I> wrote in message 
news:pan.2005.09.06.08.03.09.279088@nospam.thankyou.says_I...

> Renault Laguna 1.8 SOHC.  Does anyone know the factory quoted power output
> of these engines?  What is the redline officially?  My rev counter goes up
> to 7000 but methinks it might go terminal around that.
>
> It starts to pull at 4000 and then "comes on cam" at 5000 and revs to
> 6000 quite freely. I don't want to over rev it as I've already had to do a
> head gasket due to a faulty thermostat and don't want to do that or
> similar again!



Autodata list two different engine model variant, one is max at 5750, the 
other 5250, so anything above that is a waste of effort.  Bear in mind that 
the rev counter may be inaccurate just to confuse things.

the F3P 720/724 is 95din at 5750 (94 - 98)
F3P B670/S724 is 90 at 5250 (96 - 98)

mrcheerful

On Tue, 06 Sep 2005 08:31:20 +0000, mrcheerful                            
                                             . wrote:


> 
> "gazzafield" <rufty_tufty_hoolythug@nospam.thankyou.says_I> wrote in message 
> news:pan.2005.09.06.08.03.09.279088@nospam.thankyou.says_I...
>> Renault Laguna 1.8 SOHC.  Does anyone know the factory quoted power output
>> of these engines?  What is the redline officially?  My rev counter goes up
>> to 7000 but methinks it might go terminal around that.
>>
>> It starts to pull at 4000 and then "comes on cam" at 5000 and revs to
>> 6000 quite freely. I don't want to over rev it as I've already had to do a
>> head gasket due to a faulty thermostat and don't want to do that or
>> similar again!
> 
> 
> Autodata list two different engine model variant, one is max at 5750, the 
> other 5250, so anything above that is a waste of effort.  Bear in mind that 
> the rev counter may be inaccurate just to confuse things.
> 
> the F3P 720/724 is 95din at 5750 (94 - 98)
> F3P B670/S724 is 90 at 5250 (96 - 98)



Thanks for that.  How do I tell the engine type?  From the engine number?

"gazzafield" <rufty_tufty_hoolythug@nospam.thankyou.says_I> wrote in message 
news:pan.2005.09.06.09.56.46.288463@nospam.thankyou.says_I...

> On Tue, 06 Sep 2005 08:31:20 +0000, mrcheerful
>                                             . wrote:
>
>>
>> "gazzafield" <rufty_tufty_hoolythug@nospam.thankyou.says_I> wrote in 
>> message
>> news:pan.2005.09.06.08.03.09.279088@nospam.thankyou.says_I...
>>> Renault Laguna 1.8 SOHC.  Does anyone know the factory quoted power 
>>> output
>>> of these engines?  What is the redline officially?  My rev counter goes 
>>> up
>>> to 7000 but methinks it might go terminal around that.
>>>
>>> It starts to pull at 4000 and then "comes on cam" at 5000 and revs to
>>> 6000 quite freely. I don't want to over rev it as I've already had to do 
>>> a
>>> head gasket due to a faulty thermostat and don't want to do that or
>>> similar again!
>>
>>
>> Autodata list two different engine model variant, one is max at 5750, the
>> other 5250, so anything above that is a waste of effort.  Bear in mind 
>> that
>> the rev counter may be inaccurate just to confuse things.
>>
>> the F3P 720/724 is 95din at 5750 (94 - 98)
>> F3P B670/S724 is 90 at 5250 (96 - 98)
>
>
> Thanks for that.  How do I tell the engine type?  From the engine number?


I expect so, there is usually an ally plate nailed to the block somewhere 
with all the numbers on it.

mrcheerful

In message <stcTe.103353$G8.71906@text.news.blueyonder.co.uk>, 
mrcheerful 
..  writes

>
>"gazzafield" <rufty_tufty_hoolythug@nospam.thankyou.says_I> wrote in message
>news:pan.2005.09.06.08.03.09.279088@nospam.thankyou.says_I...
>> Renault Laguna 1.8 SOHC.  Does anyone know the factory quoted power output
>> of these engines?  What is the redline officially?  My rev counter goes up
>> to 7000 but methinks it might go terminal around that.
>>
>> It starts to pull at 4000 and then "comes on cam" at 5000 and revs to
>> 6000 quite freely. I don't want to over rev it as I've already had to do a
>> head gasket due to a faulty thermostat and don't want to do that or
>> similar again!
>
>
>Autodata list two different engine model variant, one is max at 5750, the
>other 5250, so anything above that is a waste of effort.  Bear in mind that
>the rev counter may be inaccurate just to confuse things.
>
>the F3P 720/724 is 95din at 5750 (94 - 98)
>F3P B670/S724 is 90 at 5250 (96 - 98)
>

I had the 2 litre 8 valve engine in two Lagunas on the run.  115bhp in 
both cases.  I vaguely recall the 1.8 being around the 100 mark, though 
from the figures above, it appears to be lower.

I'm pretty sure the redline was bang on 6000rpm on the first one, while 
the second one (bizarrely) didn't have it marked on the rev counter, 
despite the handbook still telling you "not to take the engine into the 
red zone."  The engine definitely has a rev limiter, so there should be 
no harm in flooring it in third and seeing just how high it will go.

With the 2 litre, you were definitely wasting your time going much over 
5300rpm before changing up.  Typically for an 8v engine, it was nice and 
torquey, but let itself down by tailing off at relatively low revs, and 
so requiring earlier upward gear changes than you'd get away with in a 
16 valver.

The power and torque curves would tell all, but I don't think Renault 
ever published them for these engines.  They weren't in the brochures, 
and I looked pretty hard for them on the Interweb at one point and drew 
a blank. I think this was largely down to the fact that most of their 
competitors had already gone 16v, and Renault's 8v engines were starting 
to look a bit tired by comparison.
-- 
David Thornber