latest mods, plus exhaust vid (182)

[MarkM]

Went to GDI last week and had the following mods done

Got my battery moved to boot to allow for a better IK position and straighter inlet route.

Had some harder springs fitted, 225lb front and 300lb rear. Feels much better now sharper turn in but still a surprisingly comfortable ride, youve gotta love ledas. Spring swap was free of charge from leda just had to pay postage.

Went out with Andy and did some road mapping of my OMEX ECU. The mapping was all done at various engine loads and RPM to achieve the correct AFR. You could add and take away fuel useing a laptop. You could also see various sensor readings, an interesteing one was the air intake temp. This showed up the poor positioning of the viper behind the radiator. With a 10degC outside temp the inlet went from 25 upto a max of 36degC based on how hot the coolant was getting which in turn caused the radiator to get hotter. all interesting stuff though. Car feels much smoother now.

Heres a short exhaust vid
http://www.zippyvideos.com/7722555612905276/exhaustnoise/
try this if that one didnt work
http://www.zippyvideos.com/1807541432905706/exhaust182/

and some pics

 

[Turkish]

No sound?

 

[MarkM]

works for me???

 

[lee_cup]

sounds ace mate! what size tail pipe is that?

 

[Turkish]

Odd doesnt work for me :s

 

[MarkM]

Its 3" tail pipe, 2.5" exhaust bore, sports cat and approx 205bhp (cams, omex, inlet manifold, viper)

 

[lee_cup]

wicked mate, it must fly!!!

 

[Jamie _Swales]

Sounds good, how come you only have one exhaust exit? looks wierd

 

[Rcbuk]

Loving that sound and looking well nice aswell

 

[MarkM]

Sounds good, how come you only have one exhaust exit? looks wierd

I originally had a twin exit custom but the bore was only 2" so needed to get a new one when I got my engine mods done.

At the end of the day it was a cheaper option and better for power. You could have a twin exit single silencer at the back but I wanted it done as cheap as possible.

 

[msa197]

Sounds very nice BUT, could I request a drive by, if possible.

 

[trailerparktrev]

I originally had a twin exit custom but the bore was only 2" so needed to get a new one when I got my engine mods done.

At the end of the day it was a cheaper option and better for power. You could have a twin exit single silencer at the back but I wanted it done as cheap as possible.

Go to Halfords and buy one of those tasty stick on tailpipe extensions. Then spot weld the fake sport extension to a small bar and spot that to the exhaust pipe. Heh ! heh I am joking

 

[Andy GDI]

love the burble on idle.

 

[MarkM]

Sounds very nice BUT, could I request a drive by, if possible.

I will see what I can do. That clip doesnt do it justice really.

 

[haitch]

needs more revs! sounds good, bumper does look odd tho, any plans on a new one?

 

[Ali]

hummm not so keen to the 1 piped 182! lol...Sounds ok tho. So how did you go about positioning the viper to avoid the inlet temps...

 

[SOHROB]

sounds nice but get it popping on the limiter,id like to hear it then

 

[MarkM]

needs more revs! sounds good, bumper does look odd tho, any plans on a new one?

no plans for a new bumper, the next thing will be Bens inlet manifold, 215bhp potential I think.:evil:

AJR - the viper will be setup in a similar way to GDIs demo car, see pic.

 

[SOHROB]

will it not need mapping again though ?

 

[Ali]

^ Headlight?? lol

 

[MarkM]

will it not need mapping again though ?

It may need to be tweeked a bit. The ECU can adjust the fueling to a certain extent but only when it is closed loop below 4500rpm, I think.

AJR - There is a space at that point where the valve on the old air inlet is which goes down into the arch liner. I will probably try and sort out a bit of a heat shield between the engine\radiator and air filter in take. Anything is going to be better then pointing straight at the back of a hot radiator.

 

[msa197]

Maybe a silly question but, why not put some vents in the bonnet, thus allowing cooler air into the engine?

 

[MarkM]

Maybe a silly question but, why not put some vents in the bonnet, thus allowing cooler air into the engine?

This would be the best solution but I dont really want a vented bonnet.

 

[makavelli]

mark, im sorting out gettin a custom exhaust made in the next few weeks, would you say its best to go from the two silencers to just 1? would this allow for better power output? i didnt know whether to got for a similar setup to the oe (two silencer, 2 exit) or whether to get a single silencer with twin exit?

 

[Adam]

quality stuff matey.
v nice indeed.

 

[MarkM]

mark, im sorting out gettin a custom exhaust made in the next few weeks, would you say its best to go from the two silencers to just 1? would this allow for better power output? i didnt know whether to got for a similar setup to the oe (two silencer, 2 exit) or whether to get a single silencer with twin exit?

I was told by Andy (GDI) and at the custom exhaust place that a single pipe and silencer is a better option for power. Andys demo car uses a single silencer with twin exit but the silencer is laid across the car so you cant see the silencer from the back. The Orbisoud and Supersprint exhaust use a single silencer twin exit arrangement aswell.

Go for 2.5" bore and a similar arrangement to the Supersprint (and GDI) exhaust, see link.

http://www.k-tecracing.com/show_product.asp?id=1479

 

[makavelli]

cheers for the info matey

 

[Fred@BTM]

ah memories......................

 

[ant]

luuurrverly burble you got there!

 

[Andy GDI]

if you have a look at the cup racers they use a similar air filter setup.. from behind where the headlight is, with a straight pipe

 

[furry_cup]

no sound. but im on a mac and most things dont work anyway

 

[Christopher]

very nice indeed.

 

[Rich_16v]

Some very nice mods there and it looks near enough standard cosmetically

How about a mk2 172 rear bumper that way you can accomodate the single rear pipe without it looking like somethings missing

 

[clio-lane]

Looking good Mark. I hope to be stepping up to a similar spec soon. Shhhh don't tell the g/f:quiet:

 

[Liam]

whats different about the collant you are using? (apart from the colour

 

[MarkM]

whats different about the collant you are using? (apart from the colour

Its a special formulation developed by GDI, Andy charged me £30 a litre for it .

I dont know to be honest it would be something Andy put in though.

 

[Liam]

Its a special formulation developed by GDI, Andy charged me £30 a litre for it .

I dont know to be honest it would be something Andy put in though.

just wondered if it was designed to help things run cooler than the green renault stuff.

 

[MarkM]

just wondered if it was designed to help things run cooler than the green renault stuff.

Yes I know what you mean mate. Your probably right I will PM Andy and find out what it is.

 

[Andy GDI]

its an alternative to the renault stuff, same thing really.... just different colour..

 

[Ballcrusher]

sounds nice