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

my plans what yall think

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Old 07-23-2006, 12:57 AM
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Car: 1989 rs camaro
Engine: 305 TBI
Transmission: auto
my plans what yall think

This is what I am going to do over the next 6 months to a year to my LO3 5.0 305 is it possible with a good tune to get in to the low 11s high 10s. I am committed to being a odd ball so I will stay with the 305 and not go with a 350 and stroke it. But let me know what all think and a supper charger or nitrous will be after this what do yall think will work better. I will do a DYI artical on the parts with pics as it all slowly comes in

thanks in advance yall


327 double hump camel cylinder heads $180
3.42 Positive traction by true track $357
COMP Cams Magnum Steel Roller Tip Rockers 1.6 $192
COMP Cams Magnum Hydraulic Roller Cam and Lifter Kits $781.39
COMP Cams Hydraulic Roller Lifter 1.6 Installation Kits $90
Wiseco Pro Tru Forged Piston Kits $525
Holley Street Dominator Intake Manifolds $128
Holley Carburetor and Throttle Body Adapters $52
Hooker Super Competition Cat-Back Exhaust Systems $280
Hooker Super Competition Headers $390
Dynomax Super Converters $90
Melling Performance Oil Pumps $60
BBK High-Volume Performance Electric Fuel Pump $130
Fel-Pro Gasket Kit Sets $104
Federal Mogul CH-Series Rod Bearings $53
Edelbrock Accu-Drive Gear Drives $160

Cam info
Cam Style:
Hydraulic roller tappet
Basic Operating RPM Range:
3,000-6,500 RPM
Intake Duration at 050 inch Lift:
244
Exhaust Duration at 050 inch Lift:
244
Duration at 050 inch Lift:
244 int./244 exh.
Advertised Intake Duration:
304
Advertised Exhaust Duration:
304
Advertised Duration:
304 int./304 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.600 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.600 in.
Valve Lift with Factory Rocker Arm Ratio:
0.600 int./0.600 exh. lift
Lobe Separation (degrees):
110
Intake Valve Lash:
0.000 in.
Exhaust Valve Lash:
0.000 in.
Grind Number:
CS 304H-R10
Computer Controlled Compatible:
No
Lifters Included:
Yes
Lifter Style:
Hydraulic roller
Valve Springs Included:
Yes
Outside Diameter of Outer Spring (in):
1.430 in.
Retainers Included:
Yes
Locks Included:
Yes
Valve Stem Seals Included:
Yes
Timing Chain and Gears Included:
Yes
Timing Chain Style:
Double non-roller
Assembly Lubricant Included:
Yes
Pushrods Included:
No
Rocker Arms Included:
No
Gaskets Included:
No
Intake info
Engine Block Style:
Stock/OEM standard deck
Carburetor Quantity:
Single
Intake Style:
Dual plane
Basic Operating RPM Range:
Idle-7,200 RPM
Intake Finish:
Natural
Intake Material:
Aluminum
EGR:
No


header info
Header Material:
Steel
Header Finish:
Painted
Header Style:
Shorty
Primary Tube Diameter (in):
1 5/8 in.
Collector Diameter (in):
3.000 in.
Tuned:
Yes
Primary Tube Gauge:
18-gauge
Collector Attachment:
Stock flange
Cylinder Head Port Shape:
Oval
Flange Style:
Standard
Flange Thickness (in):
5/16 in.
Bolts/Studs Included:
Yes
Gaskets Included:
Yes
Reducers Included:
No
Y-Pipe Included:
Yes
Quantity:
Sold as a pair.

Exhaust info
Exit Quantity:
Dual
Exit Location:
Split rear
System Material:
Steel
System Finish:
Aluminized
System Style:
Cat-back
Muffler Included:
Yes
Intermediate Pipe Diameter (in):
3.000 in.
Tailpipe Diameter (in):
2.500 in.

Cat info
Inlet Quantity:
Single
Inlet Diameter (in):
3.000 in.
Converter Inlet Attachment:
Stock flange
Outlet Quantity:
Single
Outlet Diameter (in):
3.000 in.
Converter Outlet Attachment:
Stock flange
AIR Tube:
No
Converter Case Material:
Stainless steel
Converter Substrate Material:
Ceramic honeycomb
Heat Shield:
Yes
Converter Style:
2-way/3-way
Old 07-23-2006, 08:10 AM
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Car: 84' Monte
Engine: 350
Transmission: 700-r4
Axle/Gears: ferd 9" posi 3.50 gears
Ehhhh, I say even if you learn enough to tune that huge cam you'll only make around 350 HP and it'll be a complete dog below 3 grand. Camel humps suck, they were good for what they were back in the day, but even vortec heads blow them out of the water today. Even with good heads and a cam a little milder your looking at around 400 hp at around 7 grand. Which will probably get you into the 12's with a set of 4.11 or 4.56 gears.

Even at 400hp you're looking at making 1.3 hp per cubic inch, which is alot. Your going to need something in the 500Hp range to run 10's, which is 1.63 hp per cubic inch. Thats getting up there, and not within the scope of a beginner. TBI may not be the best way to do things once you get your power peak above 6500 rpm. You start running out of time to inject the needed fuel.

At the hp levels you want, cubic inches are your friend. Other wise some form of forced induction or N2O will be needed. Build a bomb proof 305 that makes 300 hp and then stick a 200 shot to it and be prepared to refill the bottle after every 3 passes.
Old 07-23-2006, 08:13 AM
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Car: 89 iroc-z
Engine: 305tpi
Transmission: wc-t5
Axle/Gears: 10 bolt 3.08 posi (4 now)
Most of those cams seem to me like they'd be almost near impossible to tune, look in to the comp cams xfi grinds, they have a 114 lsa which help the computerized side out a lot i'd expect, other than that i'd say a low 11 with a 200 shot of nos and a fully built to the hilt engine would be quite possible with a lot of determination and a full wallet.
Old 07-23-2006, 08:59 AM
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Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Originally Posted by flaming-ford
Most of those cams seem to me like they'd be almost near impossible to tune, look in to the comp cams xfi grinds, they have a 114 lsa which help the computerized side out a lot i'd expect, other than that i'd say a low 11 with a 200 shot of nos and a fully built to the hilt engine would be quite possible with a lot of determination and a full wallet.
I run a comp extreme EFI cam in my 423 FWHP 305 (well 312).

Comp Xtreme EFI retrofit roller P# 280XFI-HR13
Advertised -280*/288* Duration
.050--------230*/236* Duration
Lift(1.6:1)--.576"/.570"
LSA---------113*
ICL---------108*

YouTube - 400 FWHP TBI 312
Old 07-23-2006, 09:59 AM
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Car: 91 RS
Engine: 305
Transmission: T5
Axle/Gears: 3.73
Listening to that idle makes me want that cam.
Old 07-23-2006, 07:14 PM
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Car: 78 Caprice Coupe
Engine: 355
Transmission: 4L60
Axle/Gears: 3.42
Originally Posted by Fast355
I run a comp extreme EFI cam in my 423 FWHP 305 (well 312).

Comp Xtreme EFI retrofit roller P# 280XFI-HR13
Advertised -280*/288* Duration
.050--------230*/236* Duration
Lift(1.6:1)--.576"/.570"
LSA---------113*
ICL---------108*

YouTube - 400 FWHP TBI 312
That'll probably be my next cam, I don't think I'll meet my goal on this cam but I'm hoping it helps me learn to tune. I'm would really like to hit a 13 flat or better. Which according to the calculators is around 430fwhp.
Old 07-23-2006, 08:30 PM
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Car: 1989 rs camaro
Engine: 305 TBI
Transmission: auto
I am going with iron eagle heads instead
Here are the specs

Cylinder Head Style:
Assembled
Cylinder Head Material:
Cast iron
Cylinder Head Finish:
Natural
Combustion Chamber Volume (cc):
72
CNC Machined Combustion Chamber:
No
Intake Runner Volume (cc):
165cc
Exhaust Runner Volume (cc):
65cc
CNC Machined Intake Runner:
No
CNC Machined Exhaust Runner:
No
Combustion Chamber Style:
Heart
Intake Port Location:
Standard
Exhaust Port Shape:
Square
Exhaust Port Location:
Standard
Spark Plug Style:
Straight
Intake Valves Included:
Yes
Intake Valve Diameter (in):
1.940 in.
Exhaust Valves Included:
Yes
Exhaust Valve Diameter (in):
1.500 in.
Valve Springs Included:
Yes
Maximum Valve Lift (in):
0.520 in.
Outside Diameter of Outer Spring (in):
1.250 in.
Damper Spring Included:
No
Number of Springs Per Valve:
Single
Retainers Included:
Yes
Retainer Material:
Steel
Locks Included:
Yes
Lock Style:
7 degree
Valve Stem Seals Included:
Yes
Valve Stem Seal Style:
PC seal
Rocker Arm Studs Included:
No
Rocker Arms Included:
No
Rocker Arm Nuts Included:
No
Guideplates Included:
Yes
Valve Cover Mounting Style:
Centerbolt
Accessory Bolt Holes Drilled:
Yes
Intake Valve Angle:
23
Exhaust Valve Angle:
23
Valve Guides Included:
Yes
Valve Guide Material:
Manganese bronze intake/Phosphorous bronze exhaust
Valve Seats Machined:
Yes
Valve Seat Machine Style:
4-angle intake/3-angle exhaust
Valve Seat Material:
Ductile iron
Steam Holes Drilled:
No
Oiling Style:
Through pushrod
Machined for O-Ring:
No
Heat Crossover:
No
Quantity:
Sold individually.
Notes:
Fits Vortec style intake manifolds also.


Ok here are the pistons specs

Bore (in):
3.796 in.
Bore (mm):
96.418mm
Piston Material:
Forged aluminum
Piston Style:
Flat
Compression Distance (in):
1.560 in.
Valve Reliefs:
Four
Piston Head Volume (cc):
+8.70cc
Wrist Pin Style:
Floating
Pin Diameter (in):
0.927 in.
Gapless:
No
File Fit:
No
Top Ring Thickness:
1/16 in.
Top Ring Material:
Iron
Top Ring Facing Material:
Plasma-moly
Second Ring Thickness:
1/16 in.
Second Ring Material:
Iron
Second Ring Facing Material:
Cast iron
Oil Ring Thickness:
3/16 in.
Oil Ring Material:
Stainless steel
Oil Ring Tension:
Standard
Quantity:
Sold as a kit.
Notes:
Approximate compression ratio with 67cc head: 8.6:1.
Old 07-23-2006, 10:24 PM
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Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Those Darts have 72 CC chambers. The pistons give 8.6:1 with 68 cc chambers. That will drop the compression down to 8.2:1 or so, way too low. My engine has 10.3-10.4:1 compression due to flattop pistons, near zero deck, and 58 cc chambers that have been milled slightly(ported ZZ4 heads). With around 1 point less compression, you could substitute iron vortec heads.
Old 07-23-2006, 10:57 PM
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Car: 1989 rs camaro
Engine: 305 TBI
Transmission: auto
ok thanks
Old 07-23-2006, 11:08 PM
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Car: 1989 rs camaro
Engine: 305 TBI
Transmission: auto
i could always go with what my budy did and just take a 350ci block stroke it to a 383ci put a comp cam and lifters iron eagle platinum 215cc heads and the works be done with nitric for 5 to 6 k push 640 torque at 4500 rpm and push 600hp at 5500rpm and it would just about bolt right in to I will post all the bits to it but I really want that unique factor in my car but I may just have to sacrifice it for the power I want
Old 07-24-2006, 06:48 AM
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Car: 84' Monte
Engine: 350
Transmission: 700-r4
Axle/Gears: ferd 9" posi 3.50 gears
Yes you could, and it would be much cheaper too.

Keep in mind your not going to be able to just pick up a chip burner and tune this thing with no experience. Chip tuning isn't simple, and takes time to master. Don't even think about mail order chips, that's a whole nother can of worms.
Old 07-24-2006, 07:18 AM
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Car: 1989 rs camaro
Engine: 305 TBI
Transmission: auto
i plan on having it tuned by a shop and then saving what they have done and starting with my trys
Old 07-24-2006, 03:21 PM
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Car: 91 RS
Engine: 305
Transmission: T5
Axle/Gears: 3.73


Originally Posted by invaderzim1915
i plan on having it tuned by a shop and then saving what they have done and starting with my trys
Old 07-24-2006, 03:27 PM
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Car: 1989 RS convertible
Engine: 305 TBI LO3
Transmission: TH-700-R4
Axle/Gears: stock axles 3.73 LSD
uhhh your expectations are waaay too high, turn it down a notch
Old 07-24-2006, 05:55 PM
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Engine: 350
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Axle/Gears: ferd 9" posi 3.50 gears
Sounds like some one has money to burn, I suggest you get started tuning on your stock motor, it will really help put into perspective what you're wanting to do.
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