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#1 |
Registered User
Join Date: Dec 2011
Location: Boise, Idaho
Posts: 572
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Complete 383 TBI build
Hello all,
I know this subject comes up over and over and I apologize for asking again. I searched the net and this site, read page after page and most post never have a conclusion, wander off into LS motors, big blocks, carbs or just die. My concern is programming and drivability. I can burn chips myself and confess although I understand the concept I am a rookie at best. I would like to know who has built a complete 383 TBI motor, what cam/heads, and bin. Does it run to its potential? If so do you have the bin file, I would love to see what changes where made and what headaches you might still have. If I can make decent torque with the OEM swirl ports, I have no ego,, I will run them. My 96 454 vortec truck made ~290 hp & ~400 lb ft at ~3000 and was more than enough. I considered swapping in the 454 but sold the truck complete and will use that money for this build. If anyone can direct me to a complete build, or has knowledge of a complete set up, It would be great help. My concern is I build a nice motor and never get the full potential from it and my wife divorces me because of the shop time i waste trying to make it right. No need to rehash the limitations of TBIs. I have an 89 v2500 burb, 5.7. 4.88, 35 tires I am on the fence about which way to go, my goal is for a towing/camping truck. Most post are about hp and rpm. my motor will never go above 4000 in it useful range. GM crate and hope for the best. http://www.summitracing.com/parts/na...eviews=OneStar above crate with a recommended cam. or build a 383 from my core or buy new. for a sb chevy new is almost cheaper than my local machine shop. stroker block http://www.summitracing.com/parts/sum-150100-30 heads http://www.summitracing.com/parts/sum-162108 crank/pistons http://www.summitracing.com/parts/es...e030/overview/ cam need help Thanks in advance, Chris |
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#2 |
Registered User
Join Date: Oct 2003
Location: Carmichael, California
Posts: 3,006
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Re: Complete 383 TBI build
Might be because I'm on my phone but the only links that worked for me was the block and heads.
I'm actually considering the same heads. They are nice pieces but with the 62 cc chamber you need to be careful of piston choice. And if you plan to run a roller cam you will need to change the springs. Not sure of your budget but I would look into the HT383. I think it would be a good fit for your build. You can reuse your tbi by using the gmpp vortec tbi intake or I've heard others have used a carbed intake with a TBI adaptor. Either way it would be a strong runner. You could also copy the shortblock and use the summit heads, which are made by Trick Flow, and have a really strong engine. I've played with the idea of converting my 85 to tbi and doing a similar build so I'll be following along to see what others have to say.
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Anthony |
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#3 | |
Registered User
Join Date: Sep 2004
Location: Elkins, West Virginia
Posts: 2,542
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Re: Complete 383 TBI build
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#4 |
I know the pieces fit
Join Date: Nov 2007
Location: MONTGOMERY, AL
Posts: 5,523
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Re: Complete 383 TBI build
There was a member here that put a 383 in his TBI truck maybe 2 years ago? He was from N AL but I can't remember his screen name. He posted it all here in this forum though.
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#5 |
I know the pieces fit
Join Date: Nov 2007
Location: MONTGOMERY, AL
Posts: 5,523
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Re: Complete 383 TBI build
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#6 |
Registered User
Join Date: Sep 2009
Location: Weare,NH
Posts: 1,592
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Re: Complete 383 TBI build
http://www.thirdgen.org/forums/tbi/
http://gearhead-efi.com/ Check these resources out, I will say, it's been done many times, and successfully. |
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#7 | |
Registered User
Join Date: Dec 2011
Location: Boise, Idaho
Posts: 572
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Re: Complete 383 TBI build
Quote:
Crank/piston http://www.summitracing.com/parts/es...make/chevrolet |
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#8 |
Registered User
Join Date: Dec 2011
Location: Boise, Idaho
Posts: 572
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Re: Complete 383 TBI build
I spent half a day reading over at third gen before this post. I like the site,, there is a ton of info there as well as gear head.
The HT383 looks like a decent set up but it is a vortec motor and I have to smog. Not a huge issue, I have to take the truck to the Air quality board of something and they get to inspect it??? |
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#9 |
Registered User
Join Date: Sep 2009
Location: Weare,NH
Posts: 1,592
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Re: Complete 383 TBI build
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#10 | ||
Registered User
Join Date: Oct 2003
Location: Carmichael, California
Posts: 3,006
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Re: Complete 383 TBI build
Quote:
I was planning to build a carbed version of this engine. Still might Quote:
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Anthony |
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#11 |
Registered User
Join Date: Mar 2013
Location: Stanton,TN.
Posts: 57
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Re: Complete 383 TBI build
Yes, you need a retune.The Vortec heads alone are going to be flowing 30% more air than the swirl ports.The Ramjet cam has quite a bit more lift & duration than the broomstick in the tbi motor.It's 109 LSA will also cause you some issues with the tbi computer.Of course, you will need more fueling as well for the added breathing capabilities.
Also, the Ramjet cam has a very early IVC (intake closing point), so you need to keep compression at 9.5:1, or, less to avoid excessive cylinder psi. |
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#12 |
Registered User
Join Date: Dec 2009
Location: Fairbanks, AK
Posts: 1,830
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Re: Complete 383 TBI build
I had aftermarket TBI on my '77. Tuning was a challenge. If you have to pass smog I'd be very careful knowing the combo will work ahead of time. Assume no OD on your rig, you must be turning some pretty good rpm's at 65.
With the older TBI systems I'd be more concerned with the computer's limitations. TBI can work great but that is a pretty custom setup. Have you considered a newer big block like your vortec 454? That's what I'm building for my crew cab.
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-Marcus 1991 V3500 L29 454 4L80E NP205 D60/14 Bolt 4.56's 1984 K30 292 TH400 NP205 D60/14 Bolt 4.56's flat bed 7'6" Meyer Plow 2022 Silverado 3500 L8T Project Daily Driver Project Heavy Hauler Project Plow Truck |
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#13 | |
Registered User
Join Date: Dec 2011
Location: Boise, Idaho
Posts: 572
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Re: Complete 383 TBI build
Quote:
I am installing a 4l80 along with the new motor. I think at this point i am leaning towards the OEM crate http://www.summitracing.com/parts/nal-12568758 and a flat tappet Lunati If the block has roller provision i might go that route but i have read the lifters can screw with the knock sensor http://www.summitracing.com/parts/lun-10120700 or http://www.summitracing.com/parts/lu...0701/overview/ and headers, exhaust, intake I am going to keep it as simple as possible. I need to make a cross country trip in this rig in April. I can not be tuning for months. ![]() |
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#14 |
Registered User
Join Date: Dec 2009
Location: Fairbanks, AK
Posts: 1,830
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Re: Complete 383 TBI build
Nice looking burb. Stock crate is probably smart with a deadline looming! What are you using to control the trans? Stand alone aftermarket controller? Fire up a build thread.
__________________
-Marcus 1991 V3500 L29 454 4L80E NP205 D60/14 Bolt 4.56's 1984 K30 292 TH400 NP205 D60/14 Bolt 4.56's flat bed 7'6" Meyer Plow 2022 Silverado 3500 L8T Project Daily Driver Project Heavy Hauler Project Plow Truck |
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#15 | |
Registered User
Join Date: Dec 2011
Location: Boise, Idaho
Posts: 572
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Re: Complete 383 TBI build
Quote:
i am using the tci/fast http://www.tciauto.com/tc/ez-tcutm-t...85e-to-09html/ If i can get to 350 lb ft i will be happy,, It is a DD 90% of the time. I might go for some free HP/tq with an underdrive alt pulley, electric fans, pump. It is surprising how much all of the little things can add up. I will make a new thread when i start and post part #s and prices for the complete build. I have a local shop with a dyno that will let me tune on it. I might move to the summit aluminum heads if i can not make enough power, but i can always go back if i can not make enough. A BB is not out of the question but i really hope to make my SB work. |
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