head porting and gas flowing for isf in the UK and known power gains?

[Big Rat]

@mrfunex And look at the internal engine problems that both the Mercedes has had C63 stretched head bolts and the M3 spinning crank shells.........

Id be wrong to say either of these engines have had lots of major issues they haven't I've owned the M3 and had access use of a C63 would I buy a product again from either of these companies absolutely not as engines aside they both suffer from numerous other problems niggles...... I want reliability now and @FTBBCVoodoois absolutely right they are reliable all the 'F's have a reliability record the Germans could only dream of...... if they could be bothered that is 

🐀

[A's F-word]

On 15/01/2018 at 6:54 PM, FTBBCVoodoo said:

I personally think it was built to remain reliable and within the same bhp bracket as it's rivals.

At the time the E90 M3 4.0 produced 400bhp, the RS4 4.2 about 420bhp (claimed before they coked up and were slower than death) and the C63 about 450bhp from a 6.3 (which going on the theory of a holding back an engine is probably the worst culprit and even in uprated form for the SLS had just over 500bhp - I think)

In terms of tuning your ISF.  If the juice is worth the squeeze then go for it.  Just don't break it.

 

 

The Merc guilty of bhp hold back made up for it with it's torque... and for BMW the m3 out does the isf on the track it's true but I'm not fussed about that  but Lexus were out to prove a point.... if they wanted to by 2010 they could have done more than just the LSD and freed up more of the engines potential to walk over the German super saloons..

Sadly it's left to us enthusiastic boys to do trial and error tuning lol

[A's F-word]

On 15/01/2018 at 8:04 PM, Big Rat said:

@mrfunex And look at the internal engine problems that both the Mercedes has had C63 stretched head bolts and the M3 spinning crank shells.........

Id be wrong to say either of these engines have had lots of major issues they haven't I've owned the M3 and had access use of a C63 would I buy a product again from either of these companies absolutely not as engines aside they both suffer from numerous other problems niggles...... I want reliability now and @FTBBCVoodoois absolutely right they are reliable all the 'F's have a reliability record the Germans could only dream of...... if they could be bothered that is 

🐀

I also have owned the 2 and had the Mercs 55 amg S/C beast and yea they've had issues but I've had a gtr 2.6 and they spun cranks and my Aristo had niggly issues. What I'm saying is they could have achieved better power at the same cost with no threat to it's reliability.

[Big Rat]

@A's F-word Maybe you should just bite the bullet and supercharge, if you look at the thread that @Peter P18has got running it sounds like a stupendous success for not IMO a huge amount of money considering the Bhp gains.

🐀

[FTBBCVoodoo]

Sounds like buyers remorse to me...  You may have bought the wrong car ;-)

[DAW]

1 hour ago, A's F-word said:

The Merc guilty of bhp hold back made up for it with it's torque... and for BMW the m3 out does the isf on the track it's true but I'm not fussed about that  but Lexus were out to prove a point.... if they wanted to by 2010 they could have done more than just the LSD and freed up more of the engines potential to walk over the German super saloons..

Sadly it's left to us enthusiastic boys to do trial and error tuning lol

In the video I’ve seen of a 2008 ISF v M3 & C63 at Silverstone it came second to the M3 by about 1.5 seconds on a 2 min lap and both the German cars had LSDs. Suspect a comparison of the ISF with the LSD would make the M3s advantage virtually disappear.

Back in my youth I test drove a Golf GTi 16v which on paper was superior to the standard 8v GTi. I then drove a friends 8v GTi & it was so much more torquey lower down - I much preferred it to the 16v.. I’m no expert, but perhaps Lexus dilberatley chose a higher capacity / lower bhp to ensure a more usuable balance of torque than some of the more highly tuned engines. 

[peachy]

Back in the day I used to get Kent fast road cams fitted to my hot hatches. Got an extra 35bhp from my ford escort RS2000.

I wonder if these are available for the F?

[Big Rat]

@DAW David I agree sounds perfectly plausible, the kind of HONEST development work that the Japanese put into the higher revving engines has proven to be a better long term second hand bet than the German stuff, don't hear of the Honda S2000 having problems and yet when had there last gt3 revving up to the high eights it's proved disastrous some of them are on there 3/4 engines under warranty.

Which no longer covers them for track work which is what the car was aimed at laughable 

🐀

[FTBBCVoodoo]

10 minutes ago, peachy said:

Back in the day I used to get Kent fast road cams fitted to my hot hatches. Got an extra 35bhp from my ford escort RS2000.

I wonder if these are available for the F?

I fitted these to my old Saxo VTR in 1999 (I was only 19 at the time so please forgive me the Saxo)

I should imagine they would be a tad more expensive and complicated in the F.  Could do it on the driveway with a can of WD40 and a multi-tool surely :-)

[Big Rat]

17 minutes ago, peachy said:

Back in the day I used to get Kent fast road cams fitted to my hot hatches. Got an extra 35bhp from my ford escort RS2000.

I wonder if these are available for the F?

@peachy Sean it's a rule on here mention a previously owned car then  pictures are required  

🐀

[DAW]

3 hours ago, Big Rat said:

@DAW David I agree sounds perfectly plausible, the kind of HONEST development work that the Japanese put into the higher revving engines has proven to be a better long term second hand bet than the German stuff, don't hear of the Honda S2000 having problems and yet when had there last gt3 revving up to the high eights it's proved disastrous some of them are on there 3/4 engines under warranty.

Which no longer covers them for track work which is what the car was aimed at laughable 

🐀

Wow, I’m actually stunned - that is appalling..

I knew they had issues with the GT3 engines initially, which was embarrassing enough, but to have.that many repeated failures to the point where they won’t actually warranty them for the purpose they were supposed to be designed for is beyond a joke.

Doesn’t exactly encourage you to want own a 911 when you hear this kind of stuff and I thought the 997 Gen 1 bore scoring issue was bad enough!!