- 6,483
- 9,057
- 113
- Location
- Papalote, TX
I am starting to do a GEP turbo conversion on my 1992 M998 I call "Detroit" so maybe some would be interested in the "ride"
Back story:
When I was getting ready to install the 6L80 in Detroit I knew I was going to have issues with my doghouse, I was using a cable driven tach out of a another bigger MV and I needed to add an "inline" RPM sending unit which would extend the place I could reasonably bend the cable under the NA doghouse by about 3 inches and that would not fit.
So I decided because plans were to pick up and install a GEP turbo "some day" I decided to see if I could get a turbo dog house, that would give me room for the tach cable even though I knew that "someday" the tach would have to go because there is no drive on a turbo motor, but heck that would just be "someday" right??
So I put out the want and a guy from NC named Michael Bowen contacted me and said he had a doghouse and was coming to Corpus Christi on some MV business and could bring it with him, so we made a deal and THEN he said is there anything else you need, I said maybe a 6.5L GEP turbo and I will be damned he DID have a GEP turbo, the story is it came out of I think Eastern Metals and had only around 100mi on it, he said it was the last one and he was saving for himself but had decided to not pursue HMMWVs..
I checked with a couple folks I really trust and they said he was a stand up guy, and as it turns out he WAS!!!, delivered everything he said he would.
I decided to install the 6L transmission first before the GEP so I would not be fighting more than one issue at a time.
After installing the 6L I was so happy with the way in performed I have serious doubts I would have spent the money to buy a turbo but that choice has already been made, so here we go...
Back story:
When I was getting ready to install the 6L80 in Detroit I knew I was going to have issues with my doghouse, I was using a cable driven tach out of a another bigger MV and I needed to add an "inline" RPM sending unit which would extend the place I could reasonably bend the cable under the NA doghouse by about 3 inches and that would not fit.
So I decided because plans were to pick up and install a GEP turbo "some day" I decided to see if I could get a turbo dog house, that would give me room for the tach cable even though I knew that "someday" the tach would have to go because there is no drive on a turbo motor, but heck that would just be "someday" right??
So I put out the want and a guy from NC named Michael Bowen contacted me and said he had a doghouse and was coming to Corpus Christi on some MV business and could bring it with him, so we made a deal and THEN he said is there anything else you need, I said maybe a 6.5L GEP turbo and I will be damned he DID have a GEP turbo, the story is it came out of I think Eastern Metals and had only around 100mi on it, he said it was the last one and he was saving for himself but had decided to not pursue HMMWVs..
I checked with a couple folks I really trust and they said he was a stand up guy, and as it turns out he WAS!!!, delivered everything he said he would.
I decided to install the 6L transmission first before the GEP so I would not be fighting more than one issue at a time.
After installing the 6L I was so happy with the way in performed I have serious doubts I would have spent the money to buy a turbo but that choice has already been made, so here we go...
Last edited: