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#1 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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My big orange big block
This used to be in my Camaro, and I briefly considered dressing it as a stock 396, but kept the original motor in my truck, so now this just sits on a stand.
I'm going to go shopping on eBay for some GT45 turbos and wastegates and so on and see what I can make on a friend's engine dyno just for kicks. Anyone have much experience with turbo motors? I'll take it to "alternate tinkerings" but wanted to see if there are any turbo gurus amongst us before I do... It's an all-forged 502 short block, Truck Flow 340cc rect port heads, Hogan sheet metal intake, Scorpion roller valve train, some decent parts. You can pick up the turbo kit in the second photo for about $1300, or piece them out separately for even less (without the battery box and other weirdness). Cheers, Dave
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#2 |
Registered User
Join Date: Oct 2013
Location: Alabama
Posts: 1,221
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Re: My big orange big block
ebay turbos are chinese tubos. you get what you pay for. $1,300 will barely cover the cost of a single GOOD turbo, much less an entire "kit"
good luck. |
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#3 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: My big orange big block
Yes, but the GT45 design is so old and well known now that the Chinese crank out some pretty decent product, believe it or not (or at least that seems to be the concensus on TurboForums).
I wouldn't expect them to innovate or buy anything cutting edge, but duplicate they can do pretty well. If I were building this for an actual race car, I'd use Precision or similar. But I'm not.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#4 |
Registered User
Join Date: Jul 2013
Location: Winnsboro Texas
Posts: 367
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Re: My big orange big block
If that were my high dollar engine, I don't think I would test my luck with a turbo that was "made by a child in China who's moonlighting from the iPhone factory." Sorry, I had to quote you from the radiator thread I read yesterday! I thought it was hilarious!!
![]() But seriously, I would try askin over in the Racing and High performance section (or even the Ls section) pretty sure you could find some turbo junkies there.
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The bitterness of poor quality lingers long after the sweetness of a low price is forgotten. |
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#5 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: My big orange big block
Will do! Didn't know we had a Race section, and it's not an LS, so didn't know where to go!
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#6 |
Registered User
Join Date: Nov 2015
Location: Colfax California
Posts: 1,644
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Re: My big orange big block
This is gonna be awesome, and I think you're right about the T45's being a tried and true design regardless of who makes it. What kind of fuel system are you going to use?
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#7 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: My big orange big block
Dyno cell will provide the fuel (Aeromotive A1300 I think) - then on my side 6AN lines to the rails, 85# injectors, BigStuff3 ECM. They generally have race fuel on hand, I should probably pony up the extra money for 100 octane or something so I don't grenade it, as I do not have knock detection in my ECM.
I'll have to switch to a 2-bar MAP and make sure the software is set up for it. Hopefully that doesn't require a reflash or upgrade of the box. Ordered the turbos on Sunday and they've already shipped, so I'll post a mockup picture when I get the turbos and headers!
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#8 |
Registered User
Join Date: Dec 2015
Location: Rossville Kansas
Posts: 28
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Re: My big orange big block
I have also thought of investing and also trying my luck at a Ebay turbo kit on 468 BBC.
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#9 |
Registered User
Join Date: Nov 2015
Location: Colfax California
Posts: 1,644
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Re: My big orange big block
Who's the seller for the kit? I'd like to look up a low psi kit
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#10 |
Senior Member
![]() ![]() Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,815
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Re: My big orange big block
Subscribed. I have been toying with the idea of a turbo for my longhorn, so this is of interest to me.
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other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
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#11 |
Registered User
Join Date: Nov 2015
Location: Colfax California
Posts: 1,644
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Re: My big orange big block
I found a single T45 14 peice kit for a SBC with inter oiler and everything. If I boost referenced my Holley DP would I need anything else to bolt this up and go?
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#12 |
Registered User
Join Date: Nov 2015
Location: Colfax California
Posts: 1,644
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Re: My big orange big block
what do you think Dave? Boost reference the Holley, bolt this up and go or what? Can it be done with a mechanical fuel pump?
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#13 |
Registered User
![]() Join Date: May 2013
Location: WEST PALM FLORIDA
Posts: 1,174
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Re: My big orange big block
Id get a decent electric pump and run 1/2 fuel line , you defiantly don't want to lean that engine out
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68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs 67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive 58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white 69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive |
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#14 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: My big orange big block
I don't know about the eBay turbo kits for longevity though!
__________________
1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#15 |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: My big orange big block
Well... it's all good and fun but absolutely worthless if you can't get it to hook up and use that HP . Unless your intentions are just to do burnouts for the kids on YouTube or just punching it sideways on the corners . Why not build a short bed truck from scratch in your own garage and take that monster to the track ?
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![]() 1967 Factory short bed - Old school '71 - 350 / 4bolt / 487 heads / Edelbrock C3BX Muncie M-22 4 speed / Hurst Comp plus Factory 12 bolt posi 3.73 / 255-70-15 Smoothed firewall / Factory cowl induction Power disc brakes / power steering / 3.5-5" drop |
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#16 |
Registered User
Join Date: Nov 2015
Location: Colfax California
Posts: 1,644
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Re: My big orange big block
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#17 |
Registered User
![]() Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
Posts: 2,629
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Re: My big orange big block
Interesting, Farm Truck eh? I would want something American in my rig. There are reasons for my my thinking.
I do not trust the chinese manufacturing all that stuff out of recycled metal. The shipping of recycled metal in the northwest here is tremendous. I have had Harbor Fright stuff break on the first turn of the wrench. Think about it. You have to go all the way across the Pacific when issues come up, They are in bed with the enemy ![]() If there is one thing I will do in my lifetime is support my country till the end. ![]() |
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#18 | |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: My big orange big block
Quote:
I didn't say anything about burnouts or kids, that was you. I'm doing it as an engineering exercise to see what I can build for under $1500 (plus the basic motor). Frankly I'd rather hook it up to a 230kW genhead and sell power back to the grid, but I just like watching machines work hard.
__________________
1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#19 |
Registered User
Join Date: Jul 2013
Location: Winnsboro Texas
Posts: 367
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Re: My big orange big block
Don't you love it when people don't read your original post and make assumptions? ( I'm sure I'm guilty of this too....) You never mentioned what vehicle you are putting it in. You were simply asking about info on turbos. If you have to explaine why or what "just for kicks" means, your wasting your time.
I for one am super interested in your results and don't want to see this thread go on a rabbit trail. Are you going to get both before and after dyno numbers? Keep us posted and don't forget, everyone here loves pics!
__________________
The bitterness of poor quality lingers long after the sweetness of a low price is forgotten. |
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#20 | |
Registered User
Join Date: Nov 2015
Location: Colfax California
Posts: 1,644
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Re: My big orange big block
Quote:
![]() I think Dave's project is more of a "how much punch can I pack with a budget minded turbo kit" kinda thing. Huge big block sittin on a stand + budget minded turbo kit = lots of fun for all |
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#21 | |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: My big orange big block
Quote:
So no, I'm not planning to put it into anything, just building it as a project that takes up less room than another car or truck! Since used motors are worth so little I might as well have some fun with it. If it runs well, then it's a solution looking for a problem to solve :-) I ordered two GT45 turbos and stainless steel T4 flange turbo headers that should be here this week. Once I get that mocked up I'll figure out what I need to do for intake piping and so on, as well as how to plumb the intercooler. I'm going to go water-air because (I assume) I should have access to cold water in the dyno cell, but need to verify that.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#22 |
Registered User
![]() Join Date: Sep 2015
Location: Sioux Falls, South Dakota
Posts: 702
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Re: My big orange big block
I'm in to follow this one a boosted big block in any rig is just a recipe for fun and a budget one at that is very interesting keep us posted
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"Orange Crush" |
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#23 | |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: My big orange big block
Quote:
__________________
![]() 1967 Factory short bed - Old school '71 - 350 / 4bolt / 487 heads / Edelbrock C3BX Muncie M-22 4 speed / Hurst Comp plus Factory 12 bolt posi 3.73 / 255-70-15 Smoothed firewall / Factory cowl induction Power disc brakes / power steering / 3.5-5" drop Last edited by Grumpy old man; 07-19-2016 at 08:06 PM. |
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#24 | |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: My big orange big block
Quote:
I was going to put it in Alternate Tinkerings, but since I don't know what its going into yet, it still could be a truck. But it might not be.
__________________
1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#25 |
Senior Member
![]() ![]() Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,815
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Re: My big orange big block
OK I will make it official. The thread should be left here because I am interested in a turbo in my 71 Longhorn.
__________________
other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
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