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  1. #1
    Reaper9789's Avatar
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    2018 GP1800 Turbo build.

    Alright guys, I think I have enough pictures now.
    backstory. Around 100 hours the head cracked and ruined the clutch, supercharger and made the crank walk a little.
    I rebuilt it using a 2016 svho supercharger, a 2014 HO head with HO cams, Super tech springs and retainers. Custom 13/17 solas pitched by deans. And a water/methanol injection. I was turning 9300 rpm but only getting about 85.3mph max. Well the new "updated" clutch lasted less than 20 hours. (mid range pull was amazing with the methanol and 3 extra degrees of timing)

    So I said screw it. Ordered a Tig welder that could do stainless and aluminum.


    I browsed around for a turbo I wanted to use, but did end up ordering one that was a bit smaller than I intended. I wanted to make sure it had a stainless exhaust housing. ($780)

    I also found a guy on facebook that sells a flange to bolt directly to the stock exhaust manifold. ($140)
    I ordered a bunch of stainless piping in 2.5", 3", 3.5" 1.5" and 1.75"

    I ordered a genuine Tial wastegate (more on that later) And got to work fitting and welding. ($320 for the wastegate)

    The up pipe is water jacketed fully and the down pipe is jacketed through the first 90, then water just sprays into the exhaust from there.
    A small section of 3.5" aluminum ties it to the Worx rear exit with some couplers. (This was a huge pain in the ass to install, I dont have long arms and my forearms are thick.)

    The wastegate dump tube is a flexible section welded into the downpipe, it is not jacketed and will be heat wrapped soon.
    I also did not water jacket the turbo and will be using a turbo blanket on it. (I usually run without the back seat)

    I removed the old supercharger and sold it for $670 and pulled the clutch out and threw it away for the last time.
    I had an HO oil pump gear from a buddy along with the cover plate. (free) The old oil feed line was removed and an M10-1.25x16 bolt filled the hole in the oil pump.

    Oil is fed from the old banjo line to an m10-1.25 to 4an fitting going to the oil line. (its a very tight fit)
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  2. #2
    Reaper9789's Avatar
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    Oil is fed from the old banjo line to an m10-1.25 to 4an fitting going to the oil line. (its a very tight fit)

    It dumps back into the oil drain line for the head with a 5/8" high temp silicone hose. Just like mittens did on his FZ build (no picture)
    I chose to run the 2.5" intercooler piping on the intake side for ease and to keep it away from the exhaust, its a pretty simple setup.
    I hooks directly to the Fizzle in its factory location.

    Fueling is stock except for Riva 1000cc injectors and some spacers to raise the fuel rail (almost didnt clear the intercooler piping)
    I also added a riva 3 bar map sensor kit.
    It is currently being tuned by Jesus at Riva, he is a breeze to work with and Im very thankful for him.

    I swapped the 13/17 for a stock 13/20 to bring my rpms back down.
    The ski made 16psi today, but its running very rich at the moment and doesnt like it. I only hit 81 today because I didnt want to push it, just get datalogs.
    Im running the maptuner datalog kit with the plx and wideband, and I use double sided tape to hold the maptuner to the glovebox for testing.
    I sold the supercharger, the riva air intake, the clutch idler gear, and the aquasport 02 sensor adapter and got back a little over $1100

    As for the wastegate, Since I decided to run the tial, im able to change out springs for more boost without having to rely on a boost controller. right now im running the 14.5psi setup (making about 16psi) and I will be changing springs to make 17.4psi (according to spring rate)

    Im sure I missed a bunch of stuff, So feel free to ask.
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    Last edited by Reaper9789; 11-15-2021 at 07:51 PM.

  3. #3
    Lake Lion
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    Nice. What model turbo is that?

  4. #4
    Reaper9789's Avatar
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    Quote Originally Posted by hotbutta View Post
    Nice. What model turbo is that?
    Its a pulsar 2867R, But I should have gone with the 3067R
    they are similar to garrett turbos.

  5. #5
    Lake Lion
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    Under 18psi and 9600rpm, that turbo is pretty good. It falls off the map at that point but I've seen guys run way off the map and still be fine. Backpressure should be okay with their .82 housing, so stepping up to the 30 turbine might not help(at your 17psi and 9300rpm) .

  6. #6
    Reaper9789's Avatar
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    Quote Originally Posted by hotbutta View Post
    Under 18psi and 9600rpm, that turbo is pretty good. It falls off the map at that point but I've seen guys run way off the map and still be fine. Backpressure should be okay with their .82 housing, so stepping up to the 30 turbine might not help(at your 17psi and 9300rpm) .
    It made about 17psi at 8780rpm with the 13/20.
    I cant wait to get the tune dialed in. I mostly race buoys so I wanted the fast spool.

  7. #7
    pulsar gtx3067 is what i use on my sho build now . very nice turbo

  8. #8
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    Good to see you getting it working! once dialed more in tune wise your going to love it. Looks good for sure. How did it feel just trying to data log it? sounds and feel differ right? and so fun not being worried about reving it or blowig off, ha.

    Few comments:

    Welding looks good, no hate! I need to try some tig my self.
    I tried to keep a high point in my down pipe to keep back wash from flowing up the rear exit and into the turbine/exhaust yours has a 90 but looks low (sideways only) would be curious if your getting water in to the turbine. I also park it beached and drink beers with waves washing up the back some, so a worry on mine for sure.

    I like that you skipped the banjo bolt. I could not find a fitting that fit the block and was 6an. I did find the 4an you are using. I bet I can get away with the smaller oil line too, but was being careful as borg Warner said step up to a 6an for over 16 inch oil feed lines. I need to look hard for that in a 6an this winter to bypass having a banjo my self this winter. Or possibly going to a 4an.. as I think it will be fine and in a warmer climate.

    I also almost ran my cold side over the intake side. its cleaner for sure, only issue was clearance over the fuel rail, and injectors. I also have flush valve, located there so would have blocked that.

    When I was leaning towards the Garret turbo, I also looked at pulsar turbos. they are like the best copies you can get, great reviews, and a lot of people having great results for cheap. Hope they work great for you.
    Last edited by mittens; 11-16-2021 at 09:13 AM.

  9. #9
    Reaper9789's Avatar
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    Quote Originally Posted by mittens View Post
    Good to see you getting it working! once dialed more in tune wise your going to love it. Looks good for sure. How did it feel just trying to data log it? sounds and feel differ right? and so fun not being worried about reving it or blowig off, ha.

    Few comments:

    Welding looks good, no hate! I need to try some tig my self.
    I tried to keep a high point in my down pipe to keep back wash from flowing up the rear exit and into the turbine/exhaust yours has a 90 but looks low (sideways only) would be curious if your getting water in to the turbine. I also part beached and drin beers with waves so a worry on mine for sure.

    I like that you skipped the banjo bolt. I could not find a fitting that fit the block and was 6an. I did find the 4an you are using. I bet I can get away with the smaller oil line too, but was being careful as borg Warner said step up to a 6an for over 16 inch oil feed lines. I need to look hard for that in a 6an this winter to bypass having a banjo my self this winter. Or possibly going to a 4an.. as I think it will be fine and in a warmer climate.

    I also almost ran my cold side over the intake side. its cleaner for sure, only issue was clearance over the fuel rail, and injectors. I also have flush valve, located there so would have blocked that.

    When I was leaning towards the Garret turbo, I also looked at pulsar turbos. they are like the best copies you can get, great reviews, and a lot of people having great results for cheap. Hope they work great for you.
    Jesus had the tune super safe and rich. My first map sensor wasnt a 3 bar ( I ended up buying the riva kit) so it coated the plugs pretty bad. So first runs were pretty rough, ski didnt want to idle. Its stupid loud. WAY louder than rear exit with gutted box.

    I wanted the exhaust higher, but the GP has more deck space and less space inside compared to the FZ so it wasnt really an option. but my stinger pipe ends after the first 90 and is 3.5" the rest of the way, so water would have to come in and around and then up into the 3" exhaust. (if it kills the o2 sensor, it will be a dead giveaway lol.

    As far as the oil line, the pulsar turbo has a tiny oil restrictor in it, there should never be a need for a larger line.

    Hopefully the turbo holds up, its not nearly as cheap as an "ebay turbo" but the build quality is great and everything feels tight.
    I guess the GP has more space on the sides, Im running 2.5" intercooler piping and it clears the side and the fuel rail.

    I wouldn't even have known where to start without your build though. I have welded since I was 11 (stick and mig) The tig is much harder on the stainless, but the aluminum is a breeze.

  10. #10
    Reaper9789's Avatar
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    I upped the spring pressure in the wastegate and should be able to do some testing tomorrow.

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