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  #1 (permalink)  
Old 12-15-2011, 10:06 AM
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Fuel Injection Questions

I have a 69 SS Camaro that I'm thinking of converting to fuel injection. I'm undecided between tbi and mulitiport. Lets start with the tbi questions, Holley, F.A.S.T., or Proffesional Products, which one is the better tbi. I was told by a mechanic he felt the Holley was a better choice. I've heard F.A.S.T. was better, nothing on Professional Products. I haven't seen any reviews from websites that have used any of these products. Mulitiport would probably give better performance but cost a lot more with more work involved.

I'm not interested in mashing the gas pedal but more interested a smoother running 350 with better gas mileage. Any advice?

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Old 12-15-2011, 10:18 AM
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go with a used tpi system
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Old 12-15-2011, 10:24 AM
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Thanks but which one?
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Old 12-15-2011, 10:24 AM
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all the F.I. guys will tell you multi port

on your list of T.B.I. , from the homework I have done, I would NOT use the Pro. Products

I am still leaning toward the FAST EZ EFI, because I want to use dual TBI on a tunnel ram

one more for you to really look at, is the new MSD Atomic EFI it can be set up to work with/control all your other MSD stuff
(I am still digging into this one)
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Old 12-15-2011, 10:35 AM
How fast is fast enough?
 
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a used tpi with ms or a 411 computer is more than you'll need. total cost will be less than $500
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Old 12-15-2011, 10:52 AM
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im with ap... get a used TPI system off of a f body. Look into injectors off of an LT1 for a 350 and if all you want is low end grunt, smoothness, and fuel economy it will work great for the price.
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Old 12-15-2011, 11:42 AM
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What is the MS or 411 computer? What about the wiring harness and fuel pump?
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Old 12-15-2011, 11:55 AM
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Quote:
Originally Posted by elwaupo
What is the MS or 411 computer? What about the wiring harness and fuel pump?
I believe he means MegaSquirt by MS and that is a DIY fuel controller. The 411 I believe is a production speed density computer that can be chipped... not 100% on that one though.
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Old 12-15-2011, 12:47 PM
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Quote:
Originally Posted by zildjian4life218
I believe he means MegaSquirt by MS and that is a DIY fuel controller. The 411 I believe is a production speed density computer that can be chipped... not 100% on that one though.
Its a computer from a 01-02 chevy that can easily be used for that application with proper tuning.

MS is megasquirt, a MS1 is more than sufficient IMO, but if you really want full sequential you'll need MS3. Set it up with Tuner Studios and you can have the whole thing done in a Saturday (assuming you know how to strip and crimp wires and can install an intake).

The stock TPI is AMAZING for street driving under 5000 RPM, there is not a better intake available for that range. The only upgrade you may want to consider is larger runners and blending the upper and lower intake manifolds- not necessary on a street only car though.
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Old 12-15-2011, 09:02 PM
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I have the Powerjection III and love it. It's adaptive learn is the easiest to set up, yet it also lets you unlock all tuning features if you want to create your own maps.

The fact it literally bolts on where your carb was, saves time and money. Plus if you sell the car, the PJIII can go to the next engine, even if you go Ford to Chevy.

The PJIII TB will flow 930cfm which is higher than it's competitors. I have 80# injectors supporting right at 600hp with tons of room to grow. Decent cam 253*@0.050" / .605" lift yet idles like a kitten. A lumpy kitten, but street manners are great. Much, Much better than my carb was.


I also like that it looks like a carb. Especially with the air cleaner on. Feel free to PM any questions. Or check out the Professional Products forum.

The polished version I have is sexy IMO.


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Old 12-16-2011, 07:28 PM
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That looks sweet!
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Old 12-16-2011, 08:34 PM
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Landshark, did you see much better fuel efficiency as in MPG? Just curious. I know fuel injection is better in most areas of dependability, but wondering how long it would take to break even at around a 2-3k investment is fuel savings...Thanks
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Old 12-16-2011, 09:50 PM
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When I went from a carb to a TPI setup in my old 66gmc I picked up about 4mpg. Then I put in an overdrive and got another 3-4. This about 7 years back so I could be off a bit.

It may take some time to repay the investment. But you have that extra cash now. In another few years, you may not, and may wish you had better mpg.
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Old 12-17-2011, 12:06 AM
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It all depends on how much you can afford and what you expect in return.There are a lot of systems in the $2000 range that are proven and have lots of support.I watched the segment for the MSD system on 2 guys garage.It looked very simple to install and effective.If it was me I would do a complete LS conversion.Great mileage and unlimited power if you want to go FI.
Good luck.
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Old 12-17-2011, 06:35 AM
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What is the LS conversion set?
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