Snap, Crackle & Pop!

[riplash]

Ok.. might sound like a gripe to some people whod love a burping, spitting, popping exhaust system, but mine is just excessive!!

Its doing it just cruising in traffic, as soon as I get back on the gas after lifting off.. even in 4th/5th.. even at relatively low revs.

Is this indicative of massive over-fuelling? (duh)

Easy way to solve? (adjust the PBV that I think is on my car - still needs RR time though)

Hard way to solve? (remap!!!)

Or should I stop being a pussy and just live with it?


Its possibly partly due to the car being set up with an IK that isnt there any more.. car has cams, headwork/inlet work etc so possibly with IK needed more fuel than it does right now?

Just guesswork on my part.

 

[night.icon]

stop being a pussy !!!!

 

[riplash]

Dont get me wrong.. I like extending 2nd/3rd gear to higher revs and triggering it myself!!

Just a bit distracting when its doing it all the way home through rush hour traffic.

 

[Ben H]

This is my old car! Dont offend it!

It always overfuelled a bit, with puffs of black smoke quite common. Its the way its set up through the second fuel regulator (some call it a PBV) to stop it running lean with an induction kit fitted.

Id not worry since theres no catalyst fitted to damage (thats why I fitted the de-cat) and it makes great flames from time to time. Id consider fitting an induction kit, to experience the noise if nothing else, but make sure you keep the airbox for performance in the hotter weather.

I really, really miss that car. The noise was just fantastic. Enjoy!

 

[FATBOY]

if u dont want the exhaust then pass it to me mate!!!

 

[riplash]

Ben H: Haha.. no smoke really, well none that Ive noticed.. we got it to do a few nice flashes/flames the other night though!! (with my mate in car behind!)


Not really a moan, just a voice of concern really.. didnt know if it was anything to worry about.. just pops ALL the time!!

I think a piggy-back chip is on the cards later this summer so well see how much more can be tweaked out of old HOL - hes getting cared for well matey, first oil change is booked for this weekend, and hes getting a damn good waxing. Already washed it twice in 10 days !! heheh

 

[riplash]

Quote: Originally posted by FATBOY on 14 April 2004

if u dont want the exhaust then pass it to me mate!!!

hehe.. I think the cams etc contribute to the general yobbish nature of the system too !!

 

[Ben H]

Ahh, youre treating Holly well I see. But really, hes used to a wash every other day and a wax about twice weekly!

Lovely car - Id buy it straight back if ever I lost the Williams. Ive gone for the standard route with the Williams and it makes me miss Holly so much.

 

[Ben H]

For the reference of everyone else "Holly" is my old tweaked 16V, running breathed on cams, head and an improved fuelling system. The exhaust set up is a Mongoose cat-back stainless system and a BB Tuning de-cat pipe.

Riplash - if you look closely at the fuel rail (in front of the inlet manifold, under the second grey cover) youll see it says it was made in 1992 (Holly was made in 1994). AFAIK its from a 19 16V and isnt standard.

Out of interest, how does it compare to the Williams?

 

[riplash]

Quote: Originally posted by Ben H on 14 April 2004


Riplash - if you look closely at the fuel ril (in front of the inlet manifold, under the second grey cover) youll see it says it was made in 1992 (Holly was made in 1994). AFAIK its from a 19 16V and isnt standard.

The plot thickens!!


:: runs off to check it out ::

Quote: Originally posted by Ben H on 14 April 2004



Out of interest, how does it compare to the Williams?

Below about 4k revs it feels pretty lifeless, I was expecting that though.. still has a decent amount of pull in some gears below these revs but nothing like the Williams. Really notice it negotiating roundabouts/pulling away from junctions.

Once you get into that power band though, I swear Holly pulls harder than the Willy did - maybe its psychological because of the jump when you hit 4k/4.5k - but it certainly feels quick anyhow.

The 17"s need to come off before I could offer a sound judgement really though.. its not all that chuckable on these wheels, and I cant help feeling Im not getting full potential from the engine.

 

[BenR]

The pop is a simple result of the TPS going from no load and no fuel situations to min load and fueling.

 

[night.icon]

Quote: Originally posted by riplash on 14 April 2004

Quote: Originally posted by Ben H on 14 April 2004


Riplash - if you look closely at the fuel ril (in front of the inlet manifold, under the second grey cover) youll see it says it was made in 1992 (Holly was made in 1994). AFAIK its from a 19 16V and isnt standard.

The plot thickens!!


:: runs off to check it out ::

Quote: Originally posted by Ben H on 14 April 2004



Out of interest, how does it compare to the Williams?

Below about 4k revs it feels pretty lifeless, I was expecting that though.. still has a decent amount of pull in some gears below these revs but nothing like the Williams. Really notice it negotiating roundabouts/pulling away from junctions.

Once you get into that power band though, I swear Holly pulls harder than the Willy did - maybe its psychological because of the jump when you hit 4k/4.5k - but it certainly feels quick anyhow.

The 17"s need to come off before I could offer a sound judgement really though.. its not all that chuckable on these wheels, and I cant help feeling Im not getting full potential from the engine.






roundabuts re easy u need to work the gears

take all roundabout in 2nd gear doing about 40 u should notice the difference

 

[riplash]

Yeah have been John.. thats my point.. You have to work so much harder to make good progress in those situations, and if you have to stop to give way youre stuffed!

 

[night.icon]

Quote: Originally posted by riplash on 14 April 2004

Yeah have been John.. thats my point.. You have to work so much harder to make good progress in those situations, and if you have to stop to give way youre stuffed!

get better breaks as well

 

[riplash]

Sorry, I meant if you have to take on r/bout or junction from a standing start you are stuffed.. takes so long to get momentum up. Dont know how much is down to the 17s though..

 

[Ben H]

Id agree with you about the character of the 16V versus the Willy.

Down the same twisty roads, theres no doubt that between the better suspension and wider torque band the Willy is a slightly quicker car. However, Im pretty sure that my old Valver would be a match for my Willy in a lot of straight line situations - mainly in 4th and 5th at motorway speeds because thats when all the power gets to the wheels.

When I first got the Williams, I appreciated the torque and handling but was convinced that the Valver was about the same in speed terms. Im only now learning that redlining it in every gear doesnt necessarily make for best progress in the Williams.

Out of T-junctions and tight bends, where the Valver would hesitate until the revs rise in 2nd, is where the Willy makes its killing. But on smooth roads I reckon my old (and remember, tuned) Valver would match it.

P.S. I went from a set of 16s to Phase2 15s and really noticed the difference. The car was a lot lighter on its feet and accelerated off the mark a lot better.