New 6.9 purchased

Post by **m48pro69** » Fri 06 Jun, 2014 7:55 pm

Drivers side welded up with flanges welded on for 2 into 1 pipe to be added now for passenger side

Post by **m48pro69** » Thu 12 Jun, 2014 8:28 pm

Ok Drivers side is completed . Passenger side to do next then exhaust. Passenger side will be a lot quicker as there is more room .

Post by **McGavin** » Thu 12 Jun, 2014 8:53 pm

Looking good.

Post by **m48pro69** » Thu 12 Jun, 2014 9:09 pm

Hi Dirk you will be please to know Genie have decided to do extra dyno run . Will dyno car when extractors and exhaust are fitted . Then after throttle body is fitted :dance:

Post by **McGavin** » Thu 12 Jun, 2014 9:45 pm

Got taken for a spin in a M117.968 high comp powered race car at the weekend, it had a lot of dyno time and fine tuning, larger throttle body, EFI , etc, there is a sleeping giant just waiting to be unleashed , so much potential in these motors. Looking forward to your results.

Post by **m48pro69** » Thu 12 Jun, 2014 9:52 pm

Hi Dirk yes I agree I am fitting 92mm throttle body as well. I will call MbSpares in the morning found steering damper has failed need to buy new one.

Post by **Greg in Oz** » Thu 12 Jun, 2014 11:00 pm

m48pro69 wrote:Hi Dirk you will be please to know Genie have decided to do extra dyno run . Will dyno car when extractors and exhaust are fitted . Then after throttle body is fitted :dance:

Those results will be very interesting being able to see the improvements from each modification.

I noticed lots of discussion in your similar topic on the TK forum regarding the correct pairing of cylinders for the pipes.

Post by **cuisses** » Thu 12 Jun, 2014 11:29 pm

Greg in Oz wrote:
m48pro69 wrote:Hi Dirk you will be please to know Genie have decided to do extra dyno run . Will dyno car when extractors and exhaust are fitted . Then after throttle body is fitted :dance:
Those results will be very interesting being able to see the improvements from each modification.

I noticed lots of discussion in your similar topic on the TK forum regarding the correct pairing of cylinders for the pipes.

Let us hope, after all that nice metalwork, that the power curve actually goes up. :pray:
It looks so nice it is almost a shame to use it.

Post by **m48pro69** » Fri 13 Jun, 2014 1:32 am

Hi Greg thanks for the advise went looking for information yes you were right . Didn't find it on the net to begin with . I have an old engine tech book from Phil Irving that belonged to my late grandfather had a read and found what you were talking about. Your comments created a light bulb moment that I remembered reading about. It was in this book he was talking about extractors on Repco Brabham race car. As you would have seen on other forum they didn't want to believe that was the correct design. I spoke with Tony the owner of Genie about it and he said it was correct design he would see if it was possible. It is but not without removing un used cast in brackets from rear of drivers side engine mount. As for seeing job will let you know were I end up when I move east it will be later this year. :dance:

Post by **m48pro69** » Fri 13 Jun, 2014 1:51 am

Hi Greg as I also said will call John in morning about steering damper after removing while doing extractors found it to be past its prime.

Post by **m48pro69** » Fri 13 Jun, 2014 11:25 am

Steering damper ordered from forum sponsor thanks John . :dance:

Post by **Mercmad** » Fri 13 Jun, 2014 8:15 pm

Re Phil Irvings thoughts on exhaust design. He Didn't guess most of what he knew but used dynos,both at Norton and here in Australia. His H & F G series dyno is in the Bathurst Museum.

i was talking with a bloke a couple of years ago who makes headers for Chev powered commodores. His look very simple but work far better than the drag race style 4-1 units everyone else was making and fitting. Again,the dyno results were there to see.

Post by **m48pro69** » Fri 13 Jun, 2014 8:29 pm

Hi Ron Yes read the book years ago. And went back to re read after Gregs post . My Grandfather was a Master Tradesman Carpentry/Electrical/Stonemason & Plumber and was interested in all things mechanical. He gave me some of his books.

Post by **Mercmad** » Fri 13 Jun, 2014 8:36 pm

m48pro69 wrote:Hi Dirk that an easy one to answer most exhaust company's provide info on their web pages. Going with 2.5 duel as I don't want to lose to much low end torque. http://www.magnaflow.com/07techtips/faq/question10.asp :dance:

You will never lose torque by going smaller (2.5 is the standard size of the 6.9 pipe) . You really should have gone to 3 or 4" diameter. If running a little exhaust pipe "helps" torque then most performance cars would have more power by shoving a potato up the exhaust pipe .
On Chefklasses W111 500 Conversion we ran 4" exhausts . Beware of running too big a X in the crossover. It should only be as big as a 50 cent piece. Bigger holes lose power.
http://youtu.be/9uU-kfiDiP0 listen to the tail pipe.

Post by **m48pro69** » Fri 13 Jun, 2014 9:11 pm

Hi Ron the dual pipe that were on my 6.9 were smaller than 2 inch pipes . I thought about dual 3 inch but clearance was not so good. And this Is Tony's Toy who owns Genie http://www.youtube.com/watch?v=-4v5Jrk460Q

Post by **m48pro69** » Fri 13 Jun, 2014 9:37 pm

Hi Ron I must say I am really looking forward to seeing results . Now Genie have decided to do extra dyno run we will see what extractors and exhaust make . Then 92mm throttle body. :dance:

Post by **m48pro69** » Tue 17 Jun, 2014 3:25 am

After the phone call I received today I have a sinking feeling that one off my air cells has collapsed . Even though I have suspension in locked position while it is going up and down on the hoist. Apparently when they brought my car down for the day it started leaking sls fluid from the top of the reservoir. Will head over tomorrow apparently not much but seeing as it should not happen at all . John what's your opinion. All 5 cells were done in 2011 have receipts with car.

Post by **m48pro69** » Wed 18 Jun, 2014 10:01 pm

Ok went up to Genie this afternoon down pipes on passenger side are done just need collector welded on the ceramic coated.

Post by **m48pro69** » Thu 19 Jun, 2014 5:33 am

For those who may be concerned about radiated heat from my extractors they are being coated by this company in Perth . http://www.cicceramic.com.au/coatings/e ... d-coatings

Post by **kimrh** » Thu 19 Jun, 2014 12:36 pm

Good info here and keep the posts up as exhaust work is always a science matter with N/A engines
Good to see Genie has stepped up to put some serious testing in place for you

Post by **m48pro69** » Thu 19 Jun, 2014 4:51 pm

Hi Kim yes I am looking forward to seeing the results . The proof is in the pudding or power as the case may be. Around 50hp increase from extractors and throttle body would be nice if not will look at other areas . I believe AMG offered a 6.9 upgrade to 375hp from what I have found Ron may be able to confirm this. If so I need extra 85hp to match this. I have found supplier of adjustable cam sprockets in Germany and a Cam maker in the UK who makes new cams from billet blanks. I will go down this path in the future but after current work car is being painted. As for 4 inch exhaust there was one sitting under my car yesterday when I went to Genie. It belonged to the FEAR Monaro show and burnout car that makes over 1000hp. http://www.youtube.com/watch?v=DbfAj7n3s1c

Post by **m48pro69** » Thu 19 Jun, 2014 10:53 pm

I got the phone call I have been waiting for this afternoon extractors are completed and have been sent of to be ceramic coated. Will post pictures of them completed before refitting to car.

Post by **m48pro69** » Fri 20 Jun, 2014 9:01 pm

Ok some pictures off the exhaust up under the car x-pipe, expansion pipes or if you like small hot dogs and rear dual entry, exit muffler system is 2.5 inch all the way through.

Post by **McGavin** » Sat 21 Jun, 2014 6:34 am

Very tidy, looking forward to the YouTube with the noise happening.

Post by **m48pro69** » Sat 21 Jun, 2014 7:10 am

Hi McGavin I posted YouTube of standard car on dyno will film next dyno run with exhaust and post it will be full power run so it will be to red line and full noise. :dance: . PS I have decided to go with polished chrome look ceramic coating will post pictures before extractors go back on the car. :dance:

Post by **m48pro69** » Fri 27 Jun, 2014 12:41 pm

Ok the news I have been waiting for . My extractors are back from CIC and will be fitted by Genie today . Genie said they will try and have car ready to run tomorrow morning for first dyno run.

Post by **Greg in Oz** » Sat 28 Jun, 2014 1:46 am

They look fantastic! I am however a little surprised to see how short both the primary and secondary pipes lengths are. The tri-Ys on my 500SLC with cast iron manifolds obviously also have short primary lengths (see photo in my post at viewtopic.php?f=15&t=19159&start=25#p138802 ) but its secondaries are long and don't merge until under the front seats (see photo in my post at viewtopic.php?f=15&t=19159&start=25#p138837 ).

Post by **m48pro69** » Sat 28 Jun, 2014 2:02 am

Hi Greg more than anything clearance is the problem under the 6.9 . To get the pipes in that configuration on the drivers side required removal of some metal on the engine mount. And the secondaries are very tight around steering box . I am hoping the ceramic coating does enough to keep the heat away from the steering box and starter motor. http://www.cicceramic.com.au/

Post by **Greg in Oz** » Sat 28 Jun, 2014 9:23 pm

Similar problem with the 500SLC. The 107 engine bay is very narrow to the extent that the rear two spark plug connectors on the right bank are angled to clear the battery. Combine the narrow engine bay with the M117 fitted with tri-Y pipes and it's amazing they fit them in at all let alone with four secondaries (engine pipes) leading all the way out underneath. I can understand why RHD versions of the 500SL weren't fitted with the same setup (the LHD 500SL had the same setup as the 500SLC). Here are some photos I snapped of the tri-Y manifolds and engine pipes on my 500SLC.

Post by **m48pro69** » Sat 28 Jun, 2014 9:38 pm

The good thing is they are able to be unbolted . So if we can figure out a way for longer secondaries they will not have to be completely re made. But will see how it goes for now . Genie called at lunch time saying exhaust is finished and they will do dyno run Monday morning. :dance:

Post by **Greg in Oz** » Sat 28 Jun, 2014 9:43 pm

Looking at the photos of yours, I'm sure they will flow much better than the original log manifolds. Even if the primaries and secondaries are shorter than ideal, their better gas flow combined with a larger system throughout should see a worthwhile power increase, especially in the upper rev range. I'm looking forward to seeing the dyno results and will then be interested to see what the larger throttle body achieves on top of that.

Post by **m48pro69** » Sat 28 Jun, 2014 10:16 pm

Yes I am interested to see what happens . I know they claim ceramic coating reduces under bonnet temp by about 10 degrees and by keeping internal temp higher increases horsepower by increasing gas velocity. So I guess we will see how it goes and sounds Monday I have no doubt they will be a lot higher than standard manifolds in power and torque. Then to fitting 92mm throttle body and seeing what difference that makes. :dance:

Post by **m48pro69** » Sun 29 Jun, 2014 8:18 pm

Genie called Saturday at lunch time car is back together with extractors and exhaust. They are doing dyno run tomorrow morning will post results and YouTube plus pictures of finished exhaust on car. Car then will have 92mm throttle body fitted and be retested on the dyno. :dance:

Post by **m48pro69** » Mon 30 Jun, 2014 1:09 pm

Ok I am waiting for dyno run at Genie . But here are dome pictures while I am waiting.

Post by **McGavin** » Mon 30 Jun, 2014 1:16 pm

Very cool, so it's twin 2.5 inch , crossover , resonators and a straight through muffler, what breed?

Post by **m48pro69** » Mon 30 Jun, 2014 4:00 pm

https://www.youtube.com/watch?v=WpAmhfi ... e=youtu.be
https://www.youtube.com/watch?v=Y6VAxFI ... e=youtu.be
Ok todays dyno run on YouTube . Car sounds great very happy with finished results. Genie hoping to have car finished tomorrow with throttle body fitted and final dyno run. Results so far 256.8hp at the rear wheels. 26.7hp gain.

Post by **m48pro69** » Mon 30 Jun, 2014 4:01 pm

Mufflers Genie turbo. :dance:

Post by **Greg in Oz** » Mon 30 Jun, 2014 8:00 pm

That's better than 10% gained. Not bad for a new set of pipes. I will be interested to see the graph for the before and after compared to see just where in the rev range the gains were made. Was your previous run also done without the air filter fitted? The final results after fitting the bigger throttle body will be interesting.

Post by **m48pro69** » Mon 30 Jun, 2014 8:38 pm

No original run was with the air cleaner on the car. Unfortunately dyno broke with another car this morning. So my car was dynoed across the road at emissions testing workshop on old rolling road dyno. As it is not the same dyno decided to do run without air cleaner to remove doubt about result with next test. They have decided to do throttle test on the same dyno as today so it will show power difference throttle body makes. So I will be able say that change makes X amount of power. Then car is to go onto original dyno after repairs and will dyno with air cleaner back on car. And I will be able to show difference between standard Euro 6.9 and car with extractors/exhaust/throttle body mods . Showing total power gain in apple with apple comparison. Used opportunity to show ultimate gain with throttle body and no restrictions. Car that unfortunately caused problem was 1500hp show car. Dyno has brake issue so needs fixing. Hope this helps. :dance:

Post by **m48pro69** » Wed 02 Jul, 2014 9:17 pm

https://www.youtube.com/watch?v=vBJmKbe ... e=youtu.be Ok the good news car is running today. The bad news is throttle needs to be adjusted as something is binding as throttle needs hard push of idle. Then revs hard before freeing up to normal movement. It does mean car is un-driveable until this is sorted.

Post by **m48pro69** » Fri 04 Jul, 2014 5:48 pm

Throttle body made 21.7hp at rear wheels on old rolling road dyno. Car will be going onto original dyno Monday and will post overall increase with these mods . Seeing as different dyno used the only valid result is the 21.7hp from throttle body

Post by **m48pro69** » Sat 05 Jul, 2014 7:42 am

Picking up my car from Genie this morning will give it a clean and maybe go for a drive. :dance: :drool:

Post by **Greg in Oz** » Sat 05 Jul, 2014 10:17 pm

So, did you go for a drive? If so, how was it?

Post by **m48pro69** » Sat 05 Jul, 2014 10:56 pm

Still need to sort throttle its smooth with engine turned off . As soon as vacuum added with engine running it needs idle turned up to be able to drive and it is very snappy. Thinking maybe of drilling hole in throttle plate to relieve back pressure question is how large should the hole be. All throttle linkages have been checked.

Post by **m48pro69** » Sun 06 Jul, 2014 11:16 pm

After inspecting car today found new throttle has slight movement in the throttle shaft side ways. So I am thinking when vacuum is added throttle plate is moving side ways and jamming. So I need to find a way to stop this. Not very happy as its a new throttle body.

If that is not possible grinding small amount from throttle plate on both sides near shaft should fix catching . Just need to make sure not to much that I cannot compensate for with adjustment screw. :pray:

Post by **McGavin** » Tue 08 Jul, 2014 5:07 pm

Have you got it fixed and taken it back in yet? Looking forward to final dyno comparison results.

Post by **m48pro69** » Tue 08 Jul, 2014 5:26 pm

Still working on throttle have improved it but still not perfect once moving its ok. But take offs are like a dragster dyno is tomorrow morning at 08:00 will post results . Throttle is just adjusting and looking for the problem it appears to be shaft related. :think:

Post by **m48pro69** » Wed 09 Jul, 2014 11:29 am

Dyno run video enjoy https://www.youtube.com/watch?v=BZ3CbLY ... e=youtu.be

Post by **m48pro69** » Wed 09 Jul, 2014 11:47 am

Ok First good news dyno run as can be seen was done. Bad news throttle issues meant they could not get a proper run in. As throttle is to abrupt in take up so I have been told they will redo when I fix the throttle issues. But you can relax I did get a result not as good as my 278.5hp on rolling road . And not the final reading as issues with throttle meant it was to easy to hit limiter and could not do full load run. But 255.6hp at rear wheels Torque 348.81 foot pounds . Flywheel corrected 320.8hp . So 31.9hp Flywheel and 25.5hp at the wheels but will update as soon as I can when I sort throttle problem.

Post by **McGavin** » Wed 09 Jul, 2014 3:37 pm

I'm guessing once you get the throttle sorted, the driving experience will exceed the printed piece of paper.
Your photo doesn't show the scale, but it looks like (and sounds like in the video), power is instant off idle and delivery is relentless.
That's how that EFI 5.6 117 HV motor of Kim's is and I think your going to be happy with your set up once sorted. :)