V8 swap into I6 280SE W108 - Page 15 - Mercedes-Benz Forum

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post #141 of 162 (permalink) Old 05-27-2011, 09:06 AM
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Originally Posted by gwunta View Post

mother of god that is beautiful. i demand more information on this car!
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post #142 of 162 (permalink) Old 05-28-2011, 08:30 PM
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I am makling a little progress on exploring a 5.6 swap, a hold back is that I want and American OD tranny.

I found a place in Minnesota that makes a kit to adapt the MB diesel to a 700R4

Mercedes diesel info

I emailed him and he says he doesn't have a kit for the V8, but would like to try it.

He doesn't know if the 5 cylinder diesel and the V8 are the same bolt pattern and crank size. Does anyone here know if this would bolt up to the V8??
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post #143 of 162 (permalink) Old 05-29-2011, 05:34 AM
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Originally Posted by TFaust View Post
I am makling a little progress on exploring a 5.6 swap, a hold back is that I want and American OD tranny.

I found a place in Minnesota that makes a kit to adapt the MB diesel to a 700R4

Mercedes diesel info

I emailed him and he says he doesn't have a kit for the V8, but would like to try it.

He doesn't know if the 5 cylinder diesel and the V8 are the same bolt pattern and crank size. Does anyone here know if this would bolt up to the V8??
Engine blocks do not have the same bolt pattern. If it's just for the OD, I would keep the MB trans and get a rear diff from an r107 or early 126. You can get ones that are 2.24:1. It will be cheaper and bolt on.

Last edited by GGR; 05-29-2011 at 05:37 AM.
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post #144 of 162 (permalink) Old 08-17-2011, 11:25 PM
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mother of god that is beautiful. i demand more information on this car!
I built and own this car, what would you like to know about it?

Here's a video of my build (the one you're asking about). It has some of the specs at the end of the video, although I have changed a couple fo those since I made the video


I finally got it running on boost about 2 weeks ago. Im waiting to sort out the brakes at the moment - for some reason when I bleed the system the brake pedal is not getting hard. Im hoping to have it sorted out today.

Video of the engine running and on boost (about 2:00 in it gets on boost)


Cheers

G
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post #145 of 162 (permalink) Old 10-23-2011, 10:36 AM
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Sir Gwunta:

Your reputation precedes you

I have a thread going on here http://www.benzworld.org/forums/vint...into-w108.html and I hav some questions. I should probably ask this via email but I chose to ask it here just in case someone else may find the info useful.

I have a 67 W108 (was sold to me couple of weeks ago as a 68 but I opened the glove box yesterday and found documents in there indicating that it's a 67 - which is a bonus for me, the older the better). This car came to me without an engine but the condition of the other components such as body, paint, interior, etc is superb.

I am going to be installing a domestic power plant (engine and trans) into this car. The front runner is a Ford 289/302 but I am open to any other easier (relative speech, nothing is going to be easy for sure) transplant.

(1) Why did you choose your engine over the other choices?
(2) Did you have to modify the transmission tunnel any?
(3) Did you make extra engine mounts that is available for sale?

Thank you for your time.
(4) Did you consider a dry sump instead of modifying the steering rack?
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post #146 of 162 (permalink) Old 10-26-2011, 11:32 AM
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Thank you so much Quicksilver

I'll answer your questions as best I can. Some people wont share the same philosphy as me but I have made my transplant work so the proof is there for all to see.

1) I chose the chevy because I knew those engines really well. In Australia there are heaps of Chevy engine parts available and they are pretty cheap. I did order some stuff from the US and it was even cheaper than getting it in some places in Australia. Mercedes cars from the late 60's through to the late 70's are cheap in Australia, but the parts are soooooooo expensive. To rebuild a Mercedes engine wasnt worth it financially for me. Mercedes injection pumps are expensive, pistons, gasket sets, rockers etc are all expensive if you go down the Mercedes route. You also need to find people with the right expertise as Mercedes engines are a little different to Ford and Chevy motors. There are heaps of people that live local to me that know about performance chevy engines so its really handy to have that wealth of expertise so close, rather than having to find a Mercedes specialist and try and get some time with them.

2) I initially mocked up the engine and trans with a turbo700R transmission which fitted into the tunnel OK without modifying the tunnel, but the valve body was a little too close to the gearbox tunnel wall so I went to a turbo 350 gearbox and that was a much better fit. If you are going down the ford route I cant give you too much advice as I dont really know the C4 and C6 transmissions too well. A C4 would probably fit but I think a C6 might be tight. I also know that a Poowerglide trans will fit without modification.

3) I have a set of mounts that I fabricated to suit the 350 chevy spare if you want to look at putting a 350 into your 108. They use the stock mercedes mounting holes on the crossmember to maintain structural integrity. If you are going to stick with the ford engine then obviously the mounts will be different to the ones I have made.

4) I didnt spend huge dollars on my build and there was no way I coukd affort the $3000 for a proper dry sump setup. You can fit a 350 chevy into the 108 and use a small corvette style starter motor to give you the clearance to the stock Mercedes steering. The only reason I changed the steering on mine was because the turbo dump pipes needed to go where the steering box was.

For the easiest, simplest install stick with the Ford motor. If you are good with fabrication, then put a chevy in it and modify the sump, or use a sump pan from a 60's chevelle - they ran a front sump bowl configuration. With either engine you will need to modify the transmission cross member, but thats an easy process - tooke me about 45 minutes to do mine. Other modifications that will need to be made are:

- the tailshaft/driveshaft will need to be modified to suit the new gearbox spline configuration

- you will need to rid yourself of the stock 6 cylinder mercedes and get yourself a V8 mercedes diff, unless you want to rev the hell out of the engine to do 40mph

- an aftermarket shifter (like a B&M shifter for example) will need to be installed to the top of the gearbox tunnel - its not a huge job, but something that will need to be done before the gearbox goes in

- you will need to do a slight modification to the wiring harness if your 108 came with an automatic gearbox from stock. Mercedes used a park/neutral safety switch and wired into it from the ignition barrel, so you will need to reroute the starter motor exciter wire otherswise your engine will never start.

Any other questions, feel free to contact me

Cheers

G
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post #147 of 162 (permalink) Old 10-26-2011, 01:01 PM
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Thanks for your very detailed answer.

"I have made my transplant work" - this statement is all that matters.

I wished I could work with a Mercedes engine but a rebuilt engine and transmission is $13,500 here in Southern California, that's just silly

So a domestic power plant it is.

I'm still undecided between Ford 302 and Chevy 350, which ever I decide on I know i will need to deal with the oil sump.

I have a auto shifter mounted to the steering wheel, is there a chance this could work with a domestic transmission?

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post #148 of 162 (permalink) Old 10-26-2011, 01:55 PM
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Originally Posted by QuickSilver2 View Post
Thanks for your very detailed answer.

"I have made my transplant work" - this statement is all that matters.

I wished I could work with a Mercedes engine but a rebuilt engine and transmission is $13,500 here in Southern California, that's just silly

So a domestic power plant it is.

I'm still undecided between Ford 302 and Chevy 350, which ever I decide on I know i will need to deal with the oil sump.

I have a auto shifter mounted to the steering wheel, is there a chance this could work with a domestic transmission?
The SBFord has the distributor to the front as opposed to the SBChev which is a rear mounted distributor, which could raise issues when fitted. And maybe not!

If you went the route of a salvage yard engine from a later model (instead of the classic carbureted motor with a distributor), you can dial in all the torque you want with some basic modifications. And on a serious budget. Check HotRod Magazine May 2011 issue, "592 HP with one mod on a 4.6l". I know I have an issue covering 400hp with a $130.00 turbo from a scrap yard LS3. I will dig it up for you.

Pete
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1952 220 W187, sold to Finland; 1978 230C, sold locally; 1987 300E, stolen and murdered(RIP); 1991 300CE, dissected for parts and scrapped; 1992 600 WALD, "Yakuza Gunship"; 1992 600SEL, daily driver "Black Pearl"; 1998 E430 Sport (RIP), 1998 E430, #2 son's car; 2002 E320 4M Wagon -at US border with import/export issues
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post #149 of 162 (permalink) Old 10-26-2011, 02:02 PM
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594HP Junkyard V8

Found the article...

HotRod April 2011, "Cheapo Turbo: Junkyard V8, 594HP for $3252.00"

Page 82. I can scan it and PM if you dont have access to it.

Pete



1952 220 W187, sold to Finland; 1978 230C, sold locally; 1987 300E, stolen and murdered(RIP); 1991 300CE, dissected for parts and scrapped; 1992 600 WALD, "Yakuza Gunship"; 1992 600SEL, daily driver "Black Pearl"; 1998 E430 Sport (RIP), 1998 E430, #2 son's car; 2002 E320 4M Wagon -at US border with import/export issues
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post #150 of 162 (permalink) Old 10-26-2011, 10:29 PM
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Quicksilver, you might find this page useful. These guys m,ake the conversion stuff so that you can just bolt your engine and gearbox in. They do conversion parts for 6 cylinder ford, V8 ford and chevy into the 108. Mercedes-Benz
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