Anonymous

Have aquired this Side exit APEXI Flapper exhaust , orginally from a Skiline & modified to fit a Cossie, Mechanical control in car. Will compare it to a automatic diverter exhaust , purchased from the States, this is fully automatic & makes the exhaust straight through on boost. With this less restricted exhaust & a maybe a cam change should release a fair few more horses. Will keep you posted.SORRY IT AINT BLING

Dan

Do you really need any more horses Rod! Looks good mate, where does it exit on the side of the car?

Darrone

mattbibs

will look when finished!

Paul J

Love this idea, will sound feckin mad too

RANJ

more bling coming from the mad camp

Anonymous

For the road NO!!.
Want to have another crack at the Topspeed record & to beat it will require more Power . To beat 205 will require a lot more horses.

ADUSR33

side exhaust on a saffy..should look the dogs and free up a few more gee gees

Porkie

iTrader: (1)

Definately change the cams rod if you want to raise your record even futher! Looking at the revs you needed to pull 200mph and your dyno graph you can see the power band or the gearing needs shifting slighty. I know you love your torquey engines and mark has produced that for you but I reckon you need to keep the engine on the boil at over 7500rpm and maybe sacrifce a little of that midrane ooomph

Or maybe I'm reading the graphs all wrong and missing something! apologies if I am!

The exhaust is deffo a good idea though

Good luck

ADUSR33

god porkie u sounded like a proper tuner then

MAD matt-sab

you really are MAD rod but i like your style "chris tucker sytleee! lol

the saint

iTrader: (1)

i have a side exit for my sapphire

It will not be fitted fully untill next year and should make for some interesting noises.

good luck Rod btw

Anonymous

Porkie
Gearing is being changed by 1.5% as we ran out of revs, but it was spot-on to achieve 200 so proud of my gearing calcs.
Am waiting to see what Marks new cams do for Ranj.
Rod
ps. remember my graph is at 2.2bar , now running 2.57 in the car so things have moved on. Next time will use some of Martins optimax .
This fuel map dont drop power as on the graph.

Alg1k

iTrader: (2)

Allready have one

fitzy_88

anyone fancy explaining how this thing works?

cheers,

Euan

Porkie

iTrader: (1)

Rod, I said I think you need to chage things if you want to go faster thats all! You needed 7900 for 201 yes? but your engine peaks at around 6800? I was just making that observation and trying to help. Sorry

And as for Martins special optimax??? I don't understand your dig? Its no secret he used Race Fuel for his 195 Topspeed runs is it? He has never tried to hide it. As I remember there were loads of photos of him putting it in posted up! There were loads and loads of witnesses as well. He even published all the data from his Dyno runs with Pump and Race fuel on the Millington engine that was used for the 195 runs. Do you think he would have done that if he was trying to be sneaky?

He hadn't used race fuel on any of his previous attempts with his 500bhp RS500 spec engines though. Otherwise Mike Rainbird would STILL be bitching if he hadn't witnessed it with his own eyes

Good luck with the future runs.

P.S I think you will find that this sites definition of bling isn't just shiny parts! Well mine certainly isn't... a bling bit to me is something that is well designed and manufactured and makes the car go or look better... That Exhaust is most certainly very BLING in my eyes!

Anonymous

Porkie
No offence was taken mate, you were pointing out what will happen to my motor, but the graph is very different on race fuel.

As for the fuel thing if you do a search you will find a statement , i think from Bruce stating that he & Martin achieved 190+ on pump fuel.
Its why i could not risk using race fuel on my first attempt as the Lawyers on this site would have discredited the record.
Rod

Rick

Nice idea - makes it quiet when driving around, and noisey and unrestrective on boost

I Want one...

foreigneRS

i had this idea a few weeks back on the way home from the 'ring.

i have the twin downpipe exhaust and power engineering stainless system and plan to tee (or more like a Y-piece) off a straight pipe from each of the downpipes to exit each side under the front wheelarches. there will be a diverter flap that will either be cable operated (i can see from the picture above that a throttle flap and spring is a good idea) or better still, actuator operated.

was thinking it would be cool to have the normal silenced exhaust when driving on the road sedately, but when you get over 6 psi boost or something it just goes straight through. would help turbo spool up and sound the bollox.

Ian M

i really cant see what the difference is 200 mph is 200mph no matter how its achieved i dont think the jap boys would care how they got it either so long as they did. i think people should have a bit more respect for the achievments of rod, martin, bruce etc using a yb engine at the end of the day they are cosworth people and so are we and its nice to be able to say a cosworth has done 191, 194, 201 mph rather than having to listen to someone extolling the virtues of a supra, skyline etc

Rhys

Very nice mate!!! And how loud is that going to be?

foreigneRS

yeah i reckon it will be fairly loud. just waiting to collect the parts together to make it all really. could take a while though as i'm not really concentrating on it. will post up when it's done. we've got some sound meters at work so i'll measure it and post it up.

foreigneRS

the parts to do this using an actuator can be bought in a kit already. i always think i've come up with a good idea only to find it's been done before

http://www.atpturbo.com/root/releases/release091004.htm

mind you, at $235 i think i'll make my own using a couple of old throttle bodies. and i don't like the look of the tee-piece that they're using - doesn't look the best for flow. it would be better to have like a Y-piece and the flap operates in the middle somehow and closes off the normal silenced exhaust route and provides a smooth exit straight out.

Stavros

Yea this is done loads abroad, and is a fucking quality idea.

frog

You pull the cable, the exhaust gases go out without any restriction so you get more power.

As an added benefit, the additional noise and vibration work your doors, wings, etc... panels loose, they fly off at 170Mph and you loose a whole load of weight hence a much improved power to weight ratio.

Rod, only trying to lighten the mood - as Porkie said, that looks bling to me too.
Good luck.

Mike Rainbird

iTrader: (3)

I understand what you are trying to achieve Rod, but I don't understand everyone's (and your) obssession in trying to make it overly complicated with valves and actuators etc? Why not just get a properly designed 4" down pipe which splits into two 3" pipes (a la standard system) and has a couple of silencer boxes each side under the car with a side exit exhaust either side - should be able to keep the noise down that way at ALL times and you won't ever be restricting the exhaust gasses?

Stavros

Agree totally with mike.

foreigneRS

where's the 'bling' factor in that mike? nobody will ever notice that you've got anything trick, so there's no point spending money on it.

also, i want to do it because i don't want the extra weight of a bigger system, or the reduced ground clearance.

Anonymous

Hi
If you see at the start you will see that i am looking at all options , i have aquired & not purchased these items. Talks are also going on for a complete new exhaust system to obtain the same ends, at some point in the next two weeks Mark will decide the way i will go.
Rod

Mike Rainbird

iTrader: (3)

Nick,
How will anyone see the valve under the car? And two side exit exhausts has got to be more bling than one .

Rod,
I thought that sounded unlike you - not to test a few different things and settle on the best for you .

Kev.H

well ya learn something new everyday

foreigneRS

i'm having 2 side exit straight through pipes coming off valves on my twin downpipe.

you're right Mike that you won't see any of this normally but i'm sure people will notice that you're cruising around virtually silently but loud as foook when caning it, and then they'll want a poke about to see how it's done.

will also be good for static noise tests at circuit. no matter how hard you rev it without load, you won't get enough boost to open it up (without anti-lag of course) and it will easily pass. once out on track it will then sound awesome.

just mucking about with it really, not really saying there's any gains to be had.

Bruce Read

MAD bending the truth us usual

I said EXACTLY the quote above NOT as you previously hinted, that Martins 195 was on pump fuel