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04-02-2012, 11:01 PM
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#1 |
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Registered User
Join Date: Nov 2008
Location: Italy
Posts: 1,278
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Gave up on my TBI and went Carb
Long story short, I had my 454 rebuilt. I pulled it, stripped it, and dropped it off. I told them all stock components and specs. What I got back was flat top pistons and a different cam. I was cool with it not understanding the effects a cam change would have on the TBI. It was hell from that point on. Running super rich and not idling well. I went thru every sensor, purchased software, cables, and such. Nothing worked. I had a Eldelbrock 750 sitting on a shelf along with an extra HEI. Today I picked up a fuel pressure regulator and made the swap. Holy cow, the truck completely rocks now. Not running rich anymore and has tons of power. Idles real nice. I'm very happy with the results. All the TBI stuff will be sold!
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'68 C-10 SWB 383 Stroker (Sold 3/2/2013) '87 R2500 LWB 454 TBI converted to Carb 
Last edited by AusTx68; 04-02-2012 at 11:21 PM. |
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04-02-2012, 11:04 PM
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#2 |
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It followed me home?
Join Date: Mar 2003
Location: Yup
Posts: 5,751
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Re: Gave up on my TBI and went Carb
Reading that doesn't make me want to keep mine any more haha, what did you end up with for cam?
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Adam That's why they call it a shortcut Kyle, if it was easy it would just be the way. 86 c-10 SWB 85 CCSB 90 GMC K30 Crew SRW 1985 C30 Dually |
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04-02-2012, 11:27 PM
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#3 |
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Registered User
Join Date: Nov 2008
Location: Italy
Posts: 1,278
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Re: Gave up on my TBI and went Carb
Well, to be honest I'm not sure. It's not aggressive but definitively not like the stock cam. This truck has been my secondary backup. Only used for hauling and parts runs. I did the rebuild for reliability without really considering the specs. Until now it wasn't much fun to drive. It certainly didn't feel like a 454. Does now
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'68 C-10 SWB 383 Stroker (Sold 3/2/2013) '87 R2500 LWB 454 TBI converted to Carb
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04-03-2012, 12:33 AM
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#4 | |
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Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,064
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Re: Gave up on my TBI and went Carb
Quote:
I also went w/flat-tops & a 'towing' cam. I'm concerned about going through something similar even though I got a custom chip that is 'calibrated' w/the engines specs from tbichips.com/Harris Performance. Did you use the stock chip or??
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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04-03-2012, 01:03 AM
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#5 |
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Registered User
Join Date: Mar 2007
Location: Displaced Floridian/Bremerton, Wa
Posts: 281
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Re: Gave up on my TBI and went Carb
without a thorough tune, the cam is useless, throw an ebl flash on it and reprogram for the changes and it'll run like a top.
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'06 2500 HD 4x4. manual transfer case, crank windows. '88 V10 Suburban 4x4,"The Pig Rig" L05, 700r4, NP208, 4x4 beater camper fun truck project. My trucks don't leak oil, they mark their territory. |
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04-03-2012, 02:13 AM
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#6 |
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Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: Gave up on my TBI and went Carb
You did the right thing. Tbi is useless on anything performance.
Posted via Mobile Device
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377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511 |
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04-03-2012, 08:41 AM
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#7 | |
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Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,064
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Re: Gave up on my TBI and went Carb
Quote:
Since he's not building a race car or hi-perf motor (just a solid DD type w/improvements for efficiency), the OE TBI system should be able to be tuned for it.
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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04-03-2012, 08:57 AM
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#8 |
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Getting Old; Going Broke
Join Date: Apr 2010
Location: Owasso OK
Posts: 2,764
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Re: Gave up on my TBI and went Carb
I'm close to going carb on my 87. Poor choice of crate engine has me in the spot. The cam and heads on the replacement engine just really does not work with the TBI, main issue is vacuum it seems. It'll run pretty good as long as you drive it every single day, but still has a slight idle issue once warmed up. Not quite bad enough of an issue to cause it to stall at lights, but enough to make you rest your foot on the gas pedal at a red light to give it just a little more RPM to be sure it does not die. And that's w/out the AC on, with the A/C on you have no choice but to two foot it at stops.
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Why is every used 350 sbc out of a corvette? There's only two things that excite a man, expensive toys and real expensive toys. VEGETARIAN: That's an old Indian word meaning "I don't hunt so good." When the going gets tough, switch to power tools. |
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04-03-2012, 03:31 PM
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#9 |
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Registered User
Join Date: Oct 2006
Location: iowa
Posts: 722
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Re: Gave up on my TBI and went Carb
IMO the throttle body setups on this body style where the worst.
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"Horsepower is how fast you hit the wall, torque is how far you carry the wall with you." '84 chevy half ton short box 2wd, 67,000 actual miles  '03 chevy 1500 HD crew cab 4x4 standard box, 6.0L 
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04-03-2012, 04:26 PM
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#10 | |
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Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: Gave up on my TBI and went Carb
Quote:
Posted via Mobile Device
__________________
377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511 |
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