:::RHMT::: Real Home Made Turbo

General Category => Forced Induction => Topic started by: MantisX on April 14, 2017, 06:33:37 PM

Title: Heres my 77 Datsun blowthrough turbo
Post by: MantisX on April 14, 2017, 06:33:37 PM
Heres my contribution in trying to get some traffic back to this place. I probably would have never given a shit about a turbo if not for HMT and later RHMT. The engine is a stock L20b 2 liter that I upgraded with ARP studs. The turbo is a garrett gt2554r (for now) Yamaha R1 carbs and custom made by me airbox and whatnot. Greddy blow off valve and a shitload of jets.

(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FvJpEakY.jpg&hash=eb400a64a19bf5572994d523456455e653c6e56a)
(https://i.imgur.com/yFwWoX9.jpg)
(https://i.imgur.com/HrH7IHg.jpg)

Here it is when I first got it.
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FOdESz.jpg&hash=5e8f3ae70508b7e7463da07d0303a9b8838b4a32)
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FvAGP9.jpg&hash=90d4641594332028f447f8230343fe49d8ff5d2c)

Put a weber carb on it and got bored quick
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2Fssc4Mx3.jpg&hash=467fb22c25c7c7603c0075f88311a6ac9a0beb26)

Yanked that bullshit out and redid the engine bay
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FX3hD8UN.jpg&hash=6fc9e767ead57a548f43da867db470943853cb73)

Got my brother to shoot an ok paintjob on it.
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FpOl3sju.jpg&hash=e1b1f2111e4887bec595e33e4f9eaf571c338e4a)
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FU4KqvKy.jpg&hash=bfe31208796329e914f8e8a1768b8aec9bdc1cdb)

Working on refinishing these wheels
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FPZMttSE.jpg&hash=18f184b177a3654092706e232797e75b5ea449d2)

Then I cobbled together some turbo stuff and put it on the truck
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2F021Berc.jpg&hash=2e0fa5acc81456c7e0a97594dda085dcf258244c)
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FJqjGQPO.jpg&hash=e311f5fcf29e62ce226c6bcd11be24bb1f6ea7b1)
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2F4IuPnNy.jpg&hash=8d050ac165d653c0b335f0b5953623885d8f187c)

Manifold I made myself. Pressure tested to 32lbs and it held
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FDUh02yq.jpg&hash=68de6f726044c98f0cd37e3af7a4952968a88da2)

Got it to start
https://www.youtube.com/watch?v=RwzGtLyPCyk (https://www.youtube.com/watch?v=RwzGtLyPCyk)

After some carb jetting, pressurizing the carbs, beer and swearing I finally made a pull on 10lbs as I knew this would turn me out. Not much timing in it here as I still dont know wtf im doing. A dyno trip is scheduled.
https://www.youtube.com/watch?v=VmUtneIr_Jo (https://www.youtube.com/watch?v=VmUtneIr_Jo)

Next is to work on part throttle and turn the boost up until it says uncle. I have a spare block that Ill be completely building and ill be stepping up to a bigger turbo. Its fun as shit as boost is instant. On my integra I have to wait a second or 2 before im going.
Title: Re: Heres my 77 Datsun blowthrough turbo
Post by: ratcityrex on April 14, 2017, 08:17:27 PM
Hell yeah dude!! Looks fucking mint!!
Title: Re: Heres my 77 Datsun blowthrough turbo
Post by: highroller54 on April 15, 2017, 10:26:16 AM
Fuck yes knee grow.
Title: Re: Heres my 77 Datsun blowthrough turbo
Post by: Eggylshatch on April 19, 2017, 02:03:41 PM
MORE.
Title: Re: Heres my 77 Datsun blowthrough turbo
Post by: crxvtec91 on April 20, 2017, 02:57:04 PM
Damn this is badass! I always wanted one of those!
Title: Re: Heres my 77 Datsun blowthrough turbo
Post by: MantisX on April 20, 2017, 05:45:40 PM
I made a detonation detector using one of those hearing aid boxes, some extra wire and an alligator clip using this writeup: http://www.autospeed.com/cms/article.html?&title=DIY-Detonation-Detection-Part-2&A=0353 (http://www.autospeed.com/cms/article.html?&title=DIY-Detonation-Detection-Part-2&A=0353) Hopefully friday or saturday I can get out and do some pulls and come up on the timing a bit. I still intend to get to the dyno but I figure I can use this to make sure part throttle and coming up on and into boost is safe as is. AFRs are around 11.5-11.8.

Also started polishing on the wheel faces.
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FJxRFBP0.jpg&hash=45a435e890963abacea0d925189792b2b2231f7e)
Title: Re: Heres my 77 Datsun blowthrough turbo
Post by: Ntrain2k on April 20, 2017, 07:00:02 PM
fap fap
Title: Re: Heres my 77 Datsun blowthrough turbo
Post by: MantisX on April 28, 2017, 11:10:02 AM
Finished polishing these up and got some tires mounted. They are shitloads lighter than the ones I took off. (https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FzDZPGYmh.jpg&hash=596f5067cd6ee4ef26a941241ef27a0fb4fa06a0)

I also tested out the det detector and it works pretty damn well. You can clearly tell when the timing is where the engine is gonna take a shit. I backed off 2 degrees from that and no detonation.
Title: Re: Heres my 77 Datsun blowthrough turbo
Post by: rawr on April 29, 2017, 03:19:59 AM
sick af fam
Title: Re: Heres my 77 Datsun blowthrough turbo
Post by: MantisX on May 02, 2017, 05:10:00 PM
Still not fucking rowdy enough! Needs more timing and/or turbo.
https://www.youtube.com/watch?v=2QiKaZXD368 (https://www.youtube.com/watch?v=2QiKaZXD368)

I think im applying too much honda knowledge to this old datsun engine. N/A, these are all in at 35 degrees @ 3000rpm. Im pulling it back to 27 degrees at 8-10lbs on this little turbo. Im thinking itll be happer in the 29 possibly 30 range at these small boost levels and small turbo. Then I can pull more timing once im beyond 10lbs. Either way im not mad because it was an absolute turd without it.
Title: Re: Heres my 77 Datsun blowthrough turbo
Post by: Eggylshatch on May 05, 2017, 03:52:03 PM
Hell yeah. More vids!
Title: Re: Heres my 77 Datsun blowthrough turbo
Post by: MantisX on June 25, 2017, 05:30:31 PM
http://youtu.be/7KLY6vEFo_M (http://youtu.be/7KLY6vEFo_M)

4th gear. Almost as quick as I'd want to go in a 620. Another 2-5lbs should do it. Currently at 10lbs with more timing added. I heard this turbo becomes a heat pump after 15lbs so I'll stop there.