you turbo lot

Post Wed Mar 29, 2006 11:18 pm

just thinking, what exhaust plans do you have for turbo conversions?
do u have single or twin turbo? as there is not a lot of room for large single pipe on lowered cars, do you run it twin? even if its single turbo?
do you modify the underneath of the motor?

just a thought as i know from experience, when you split a single pipe into two, the turbulance gives power loss, and the effect on turbo cars is even greater.

i just cant imagine getting 3" single bore underneath lol

Post Thu Mar 30, 2006 8:20 am

Most people run single turbos, think Toby_Unna is running a single 3" (might be wrong though)

I'm running a twin turbo setup with a twin 2" exhaust.

Post Thu Mar 30, 2006 12:24 pm

just been building my exhaust it today. will get some pics when it's done.

single 2.5". probably too small but we'll see

Post Thu Mar 30, 2006 12:25 pm

BTW Ant's car has a single downpipe mated to a standard-sized twin pipe system, and it runs beautifully.

Post Thu Mar 30, 2006 12:44 pm

thats interesting to know. i suppose being turbo you do away with the centre box to beef it up a bit?
anyone have side exits?

Post Thu Mar 30, 2006 2:23 pm

I have a single 3inch v band flange which splits into two 1&7/8's pipes that pretty much run as the stock system did, infact centre box is std and rear box is a scorpion.

There was no room for a 3 or 4inch single down past the manifold and steering linkage so the split was kept as it is the best solution at the momment.

I have cheated a little by running an external wastegate dump pipe, so I doubt I'll ever have too many issues with the exhaust now.

One thing to note with screamer pipes is they are the very very loud

Post Thu Mar 30, 2006 2:56 pm

Mark you cant say you wasnt warned

Sound the knutz dont they!

Post Thu Mar 30, 2006 3:11 pm

A lot of guys in over in the US run single 3" pipes on both turbo and S50 engined E30s for the full system.

Some are track cars so ground clearance isnt an issue, but even the guys with road cars said it wasnt that big a deal - mind you, they dont have our crap roads to deal with

I was recommended a single 3" for my S50 conversion, but might look into having 3" oval pipe work to help with ground clearance.

Post Thu Mar 30, 2006 7:05 pm

They dont have the steering shaft in the way tho, I looked at some 3" pipe today at work and its huge for an exhaust I couldnt imagine anything under 350 hp needing it, im going to try it tho

Post Thu Mar 30, 2006 9:25 pm

im running a single straight through 3" pipe on mine with just the rear back box silencer,no problems with clearance ,but ive only dropped 40mm.

Post Fri Mar 31, 2006 3:23 pm

3" pipe is huge. plus where i used to work, we mainly worked with 1.5mm thick rather than 2mm normal stuff. the mandrel bends were 1.5mm cos 2mm would just crush and not bend.
if you hit a warm exhaust that thin, its just like tin foil.

the seperate wastegate idea sounds a good plan. where does it come out? at the front of the car? or do you run another pipe alongside the main one?

Post Fri Mar 31, 2006 4:30 pm

tonyppe wrote:3" pipe is huge. plus where i used to work, we mainly worked with 1.5mm thick rather than 2mm normal stuff. the mandrel bends were 1.5mm cos 2mm would just crush and not bend.
if you hit a warm exhaust that thin, its just like tin foil.

the seperate wastegate idea sounds a good plan. where does it come out? at the front of the car? or do you run another pipe alongside the main one?

My screamer pipe exits down by the sump, near the fan end of the block.

The wastegate is postioned below and to the right of the coil and it's a tight fit to be fair, getting it on or off is a mission and a half!!

Not done more than 10miles as it is so no feedback based on any length of use, but when it's open it sounds like the biggest supercharger you have ever heard

Post Fri Mar 31, 2006 4:38 pm

i assumed screamer pipe was a wastegate??

i know what the wastegate does. whats the screamer pipe then?

Post Fri Mar 31, 2006 4:52 pm

fozzymonster wrote: when it's open it sounds like the biggest supercharger you have ever heard

Anything like this???

Right Click save target as...

Post Fri Mar 31, 2006 4:56 pm

sound like an air plane
sound like an airlpane
an airplane
you sound like an airplane
(doesnt he get on yer nerves.)

that noise is mad

Post Sun Apr 02, 2006 4:33 pm

jmc330i wrote:
fozzymonster wrote: when it's open it sounds like the biggest supercharger you have ever heard
Anything like this???

Right Click save target as...

Indeed, just like that

but obviously much

as it comes from a e30

Post Sun Apr 02, 2006 4:35 pm

fozzy ,u tapped a boost line in where the tag was??

Post Sun Apr 02, 2006 4:38 pm

gcorky wrote:fozzy ,u tapped a boost line in where the tag was??

Yes, I did drill another one a bit further down but it ended up too large for the brake line copper pipe we used in the end. I've used up all the lines from the manifold so needed another. I plan to mod the small trianglular plate on the back of the inlet manifold to allow two more, it's the ideal place really.

How are things progressing your end?

Post Sun Apr 02, 2006 4:46 pm

SLOWLY GETTIN THERE

Post Sun Apr 02, 2006 4:59 pm

gcorky wrote:dont ask ,i am just about to give up -gettin pissed about from e30tech and now on here!!thats all ill say right now

i am loosing faith in people on forums selling,i am a no mess guy -why cant others be the same....
lol my winge for the day...so you running !have u just been to a rr???

I'm running but a few more hours from MOT yet, oil change and another round of tightening up everything.

Not long hopefully

Post Sun Apr 02, 2006 5:03 pm

which h/g and bolts you gone for metric blues????

Post Sun Apr 02, 2006 5:08 pm

gcorky wrote:which h/g and bolts you gone for metric blues????

HG is oem 2mm and the head bolts are 12.9 grade, same thing with a different name on

Post Sun Apr 02, 2006 5:12 pm

jolly good ,good to see it running.