TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

Combination questions (I've already read threads lol) . . .

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Old Jan 29, 2007 | 05:26 AM
  #1  
racer J's Avatar
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Joined: Feb 2001
Posts: 314
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From: Mesquite, Texas
Car: 1992 Chevrolet RS Camaro
Engine: 305 TBI
Transmission: WC T5 conversion
Axle/Gears: Debatable . . .
Combination questions (I've already read threads lol) . . .

Hey yall,

Been a long time since I posted and like I said, I've done a good deal of reading. The last time I had a running 3rd Gen was an 88 305 TBI in 97 (senior year of high school). At that point, the 305 fresh rebuild 305 Shortblock I tossed in for $200.00, it's $40.00 reground flat tappet custom ground cam (I don't recall the specs Crane gave over the phone), and the milled and freshened up factory heads gave me enough wheel hop to unbolt the 700R4 from the block destroying the flexplate and the transmission. I did everything short of welding the two together during the install.

Anyway that car got beat on badly and has a fair amount of body damage not to spend the time or money on fixing for a while. I picked up a 92 RS fairly cheap in all around good condition this past December qith a "305" TBI. I'm honestly thinking it's a 350 out of a truck. I know the daughter of the owner wasn't taking care of the 305 and warped the heads and damaged the block so it looks like an old 350 with an orange block got tossed in it. I'm fairly certain it's high mileage as well from the way it feels.


OK enough backstory. The point is my old 305 will be getting dropped in my 92 shortly. I'm going to go with the Hooker 2210 Super Comp FL headers (despite the Headman being so very much cheaper), true duals, and the Flowmaster 40s. I tossed an open air cleaner on it a few nights ago and while boosting the low end it hurt the top end. The factory setup was breathing well into the low 6000s range but the open air is choking off at the high 4000s. It's possible that along with the fact it sounds like an import sucking in air is because I went with the smaller cleaner that you tend to see on dual carb/TBI setups. There has been no tuning done to the 92's ECM or the 88's ECM despite the aggressive cam I have in the 88's 305. The 88 really hated stoping fast though LOL.


Ok, so the main questions are:

Why the Hooker over the Headman headers? Is it just because there are less install problems with the Hooker or, are the Hooker just more popular?

Which cylinder heads? I had been set on getting the SR 305 heads since 97. Going by the stickies and recent posts though those aren't a popular choice. Why not? Are the new ZZ4 heads the better choice?


Please keep in mind I look for the best dollar to return ratio on anything I purchase but, I also want to make the most informed purchase.

Thanks in advance,

- Racer_J
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Old Jan 29, 2007 | 04:16 PM
  #2  
Dewey316's Avatar
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Joined: Mar 2001
Posts: 6,577
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From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
It would help knowing the cam specs. For the price, I would probably go the ZZ4 route.

As for the headers..you tell me, you are the one who said you were getting hooker headers.
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Old Jan 29, 2007 | 05:16 PM
  #3  
racer J's Avatar
Thread Starter
Member
 
Joined: Feb 2001
Posts: 314
Likes: 0
From: Mesquite, Texas
Car: 1992 Chevrolet RS Camaro
Engine: 305 TBI
Transmission: WC T5 conversion
Axle/Gears: Debatable . . .
On the specs, I just have no idea. The cam is probably in the upper 400s on lift and duration with around a 110 lobe seperation.

As for the Hookers, it's really based on what I've seen hear. I was just curious why they are the most commonly used.
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