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305 TBI Blower

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Old 12-03-2000, 02:52 AM
  #51  
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yes, its the fastest 305 ive ever heard of. But i dont remember his name. I think he was breaking into 10's though.
I think Pablo would know, dont ya pablo?
Old 12-03-2000, 04:25 AM
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13.40 the 305 limit??? eric he was running a 13.40 with very limited mods. A supercharger will require the right mods and if it doesnt have them it wont give u the full benefit from the super. Try maybe a 30 over bore with a nice cam and ported heads. Letts see how high we can get that limit.


what a ****y mo fo aint he.


was thinking the same thing
Old 12-03-2000, 07:35 AM
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Bored it over and it ain't a 305 is it? Damn, with all this money were spending on this 305 we could have bought a newer car by now. Just forget about it, I don't care and I am in a **** a$$ mood anyways.
Old 12-03-2000, 01:29 PM
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That 9 second 305 you guys are thinking of was a TPI. I have the magazine somewhere with it.

13.40? coool. thats 3 or 4 seconds off the 1/4 mile. I don't see many charged LS1s or LT1s in the 9s or 10s for that same amount of work. Do you? I would think that is some hell of an imporvement.

Hey Mark get some 1.6 rockers will ya? maybe some SLP 1-3/4 headers too

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Old 12-03-2000, 02:26 PM
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Bored it over and it ain't a 305 is it?

YES it is. its only got a .030 over bore. That doesnt change the fact of it acctually being a 305 block does it?

Damn, with all this money were spending on this 305 we could have bought a newer car by now.

and how much do u think its gonna take to get that ZZ5 in there after all the work is done?

Just forget about it, I don't care and I am in a **** a$$ mood anyways.


and if u dont mind me askin who peeed in ur cherios this morning ???
Old 12-03-2000, 04:54 PM
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Yeah, but with that ZZ5 I will be pushing 430hp and low 12's second times w/o a blower or NOS. If I decide to throw one of those power adders on it will be in deep 11's. So yeah, that is money well spent. But I will admit that having a 305 tbi in 13's is amazing and is this is the first time I have heard of an LO3 in the 13's. Thats pretty good. And yes Mike, if it is bored over .030 than it isn't a 305 anymore. Its a 310. So no it isn't a 305 anymore, it used to be, but not anymore. But anyways, besides that, I think that guy with the 13 second LO3 should keep building, cause he doesn't have much further to go and it would be interesting to see what he runs when he is done.

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Old 12-03-2000, 05:50 PM
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Taz, I didnt read it in a magazine, hes from here.

Hey eric, you know i's kiddin earlier right?

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Old 01-13-2007, 11:23 PM
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so anyone have a site that sells super/turbos for the TBI 305?
Old 01-24-2007, 08:28 AM
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Car: 1993 Caprice LTZ
Engine: 350 TBI
Transmission: 4L60 (700R4)
The Vortech kits are a good kit. They were used on the TBI 454SS trucks with great success. They also made a TPI version that can be adapted to fit a TBI I believe. The Paxton TBI systems were not that great although I have seen them working.

FYI...(Prepare yourself for a shameless plug)...I have a TBI blower for a GM TBI truck that I am planning on selling if anybody is interested.

Its a Vortech system with a Supplementary fuel injection unit that runs off a Haltech computer. Its all brand new never used....except for the air tubing. The Blower is brand new, the Haltech is brand new, the Brackets are all brand new. There is most likely a bolt package that will need to be purchased to complete the kit but that is available from Vortech for a nominal fee. New the package was 31-3200. Pics are avalable. I am in South East corner of Wiscosnin...can be deleivered locally. I want 1700.00 for all.

JB
Old 01-24-2007, 12:11 PM
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it wil probably be a while before i can buy that blower, but i am def interested. think you can email me those pics?
Old 01-24-2007, 12:28 PM
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talk about bringing back threads from over 6 years ago.. see the last post?? 12-03-2000
Old 09-18-2011, 03:29 PM
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Re: 305 TBI Blower

i've been researching this topic because i plan to put a blower on my 305 tbi and this is what i've come up with. i haven't done it yet so don't know for sure if any of this is true yet. Anyway I believe the truck tbi kits mentioned are because the intake that comes with the kit fits a vortec head. I believe the L31 vortec heads will bolt onto our 305. Plus that will lower your compression ratio which you want with a blower. And like mentioned earlier I plan on using a carb to tbi plate. Haven't gotten to the fuel delivery pressure amount etc. part of the build, but you can get larger injectors to fit if you need more fuel. Or you can also do the tbi mod to make the pressure adjustable. As far as all the linkage and fuel lines obviously its hard to pre-plan that portion till the blower and tbi are on the engine then you just have to see what you need to do.
Old 09-18-2011, 04:46 PM
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Re: 305 TBI Blower

Originally Posted by naval_ned
i've been researching this topic because i plan to put a blower on my 305 tbi and this is what i've come up with. i haven't done it yet so don't know for sure if any of this is true yet. Anyway I believe the truck tbi kits mentioned are because the intake that comes with the kit fits a vortec head. I believe the L31 vortec heads will bolt onto our 305. Plus that will lower your compression ratio which you want with a blower. And like mentioned earlier I plan on using a carb to tbi plate. Haven't gotten to the fuel delivery pressure amount etc. part of the build, but you can get larger injectors to fit if you need more fuel. Or you can also do the tbi mod to make the pressure adjustable. As far as all the linkage and fuel lines obviously its hard to pre-plan that portion till the blower and tbi are on the engine then you just have to see what you need to do.
Sounds easy huh.

How will you ensure the pullies line up? Can you do fabrication work? How do you plan to tune it? Do you know how to tune it?

The cost vs gains does not justify this project

Talk to people have done it. See what they spent with the gains they got. It's not as easy as you think it is i've done the research. Goodluck though
Old 09-18-2011, 06:00 PM
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Re: 305 TBI Blower

This isn't the "its not worth doing" forum. The blower would fit on any sbc engine, so its not like if this doesn't work out it has to go in the trash.
Old 09-18-2011, 06:41 PM
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Re: 305 TBI Blower

Think your failing to see the big picture. Goodluck.

A better option is the tbi kit that is sold as a direct bolt on. Its a centrifugal(can't spell) blower sold in a complete kit for 2300 I think. Gains are about 80 hp 80 ta if you have supporting mods. Maybe look into that
Old 09-18-2011, 06:49 PM
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Re: 305 TBI Blower

http://www.tbi-superchargers.com/
Old 09-19-2011, 03:27 PM
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Re: 305 TBI Blower

How does one manage the fuel? TBI cannot see boost unless you use a "special" ECU and proper sensors(MAP). You will also need large injectors at high fuel pressure. Then the idle needs to be dealt with as it will be way overfueled.
Old 09-19-2011, 04:06 PM
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Re: 305 TBI Blower

Originally Posted by Ronny
How does one manage the fuel? TBI cannot see boost unless you use a "special" ECU and proper sensors(MAP). You will also need large injectors at high fuel pressure. Then the idle needs to be dealt with as it will be way overfueled.
4 BBl tbi, 2 bar map and EBL it can be done, if you know how to tune it. Still isnt worth it imo
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