Educated Guess At The Final Tune Results

[luke gtr]

yeah sorry, not trying to alarm just inform.

also the other issue for excessively rich tune on a new motor is fuel gets past the unbedded rings and into the oil...and petrol is terrible for bearings.

I know.

Every time I fill my tank I spin another set

[luke gtr]

hah They said I can't afford it

the length of their builds, you could save whilst it's being built and pay on the day.

[luke gtr]

just about back to the original thread topic, my fuel is too rich and then once it is leaned out a bit, will it give a better power result..

I know now that after a short time with new plugs you can feel the car getting more sluggish and it is not long before it wont rev much past 6000rpm without playing up.

needs more WOT.

[luke gtr]

Lower compression, thought it was the same, maybe a little different with the lager capacity ?

Maybe because I suggested they did not install the starter motor properly after the build. It was OK before then ?

I love it when people say it was OK when we tried it , but the problems are there the first time you drive it out of the shop , farking black magic

have had many "could not fault" issues.

One in particular.

Hyundai imax.

Stalls randomly.

4 service staff drove the car over 8 days(randomly and myself included).

Didn't happen once.

Customer comes in, drives, stalled.

Still trying to figure it out.

Just very hard as we can't replicate, so don't know if what we have done has worked.

[luke gtr]

Windsor exhaust did the mid muffler and i did the rear cannon which i made out of a HKS Super Drager

+1 for Windsor exhaust (west Sydney).

Built my 4 inch system, fairly quiet, just the way I wanted.

[luke gtr]

Fingers crossed this gets sorted soon.

[GTR_JOEY]

We ve all seen what a 3inch dump does for a standard turbo.

I would have thought this thing needs 3.5-4 inch

[Nismo 3.2ish]

Fingers crossed this gets sorted soon.

Got everything X ,

All very frustrating , when you think they are putting the right bits in to make everything work and one keeps finding shit that is not up to the job, now the down pipe is too small

Paul was saying this exhaust system should never have been built this way in the first place for this build, should have been at least 4" through to the tail.

I think he said he is running twin 3" , that makes mine seem very inadequate for a 3.2 .

Any other suggestions , trouble is I feel like I have spent enough and I know I should bite the bullet and go 4" , any idea what this would cost, The old one cost about $3500 including the down pipe, they just used the old 3" Cat.

[GTR_JOEY]

Looking for your last dyno graph for the full tune Pete

Probably missed it somewhere I here

[GTR_JOEY]

Hax near parra (can't remember his shop name) is the best guy for that job pete..

I got my exhaust done for a lot less then that and it's very very good quality steal, workman ship and I dare say there was more labour then yours by the time he did the turbo side and intake too.

Even welded new brackets for my cooler and bored out the compressor outlet of the turbo.

I can tell you I would have had a lot of change left over for 3500!

[Nismo 3.2ish]

What size is that 4"

Here is the final Dyno tune , he said it had back pressure as the 3" exhaust is too small, I said he had a 3.5" fitted but it turns out only from the Cat to the tail and the down pipe was 3"

Edited April 28, 2015 by Nismo 3.2ish

[Piggaz]

That's 4 inch, Pete.

[GTR_JOEY]

Yea 4inch to the cat.. 3.5 after.. Your turbo is bigger then mine pete

[Nismo 3.2ish]

Yea 4inch to the cat.. 3.5 after.. Your turbo is bigger then mine pete

If I run a 4" to one of those Venom 5" and left the 3.5" exhaust system on , would that work OK ?

You know I am not chasing a zillion HP, just want the farking thing to work

[GTR_JOEY]

Yea that would work fine I reckon mate

If you do the Math, the area and flow of a 4inch pipe is soooo much greater then 3"

[gtr jet]

If I run a 4" to one of those Venom 5" and left the 3.5" exhaust system on , would that work OK ?

You know I am not chasing a zillion HP, just want the farking thing to work

That's exactly what I'd be doing.

[Nismo 3.2ish]

That's exactly what I'd be doing.

Started looking around but I think I will settle on that, there are so many different ideas on exhausts it makes my head spin

[breaker1845]

Heaps of combinations, but you want to try keep it legal as possible (probably isn't anyway ) and flow well. So the 4" from the dump is the best as you want bigger there. Then stepping down to 3.5" after the cat is perfect and can muffle some of the noise generated from this beast.

If you didn't have to worry about emissions or noise, which would never happen in the real world, then the perfect idea would be to just route a dump pipe out the side of the car.

[luke gtr]

Yea that would work fine I reckon mate

If you do the Math, the area and flow of a 4inch pipe is soooo much greater then 3"

4" is equivalent area to twin 3".

My 4" in mild steel with cat, mufflers and welding the wastegate was 1700.

[Nismo 3.2ish]

I spoke to a muffler bloke this morning and he reckons 4" could stop the turbo spooling as early as it does now ??????

Just want it too run sweet , with no shit