Hot Rod Forum : Hotrodders Bulletin Board - Reply to Topic
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine> Tune port injection vs. throttle body injection
User Name
Password
lost password?   |   register now

Thread: Tune port injection vs. throttle body injection Reply to Thread
Title:
  
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
08-31-2006 04:27 PM
Rick WI Henry is right, it's hard to beat a very well setup carb and intake system for the street. My choice for performance is ALWAYS a well setup Holley HP.

BUT, a poor carb setup to EFI is like apples and footballs. The last retro we did was a 400 SBC from an Edelbrock carb and intake to a TPI controlled by a F.A.S.T. EFI system. The customer was EXTREMELY pleased with how it ran.

The trouble though with the stock TPI is it's not going to make horsepower. This application was in a truck with aftermarket runners. Still not a HP king at all but it made 450 ft/lbs of torque under 3000 RPM on the dyno. That's SAE corrected as well. Not foo foo magazine numbers.
08-31-2006 03:47 PM
1931 steve All depends on what you want to do with the engine.

The TBI is good for factory engines and has a good cold start and idle at any temp. The TPI looks better performs better and I thing has a better idle quality.

If you compare induction to induction I think the TPI wins hands down. Better performance, better fuel economy, and better looking.

I have a complete TPI set up with the upgraded runners, just waiting to be installed on a engine, problem is I have had this set up for at least 2 years, but since upgraded to a LT1 engine. So the TPI just sits on the shelf. I think for the money the TPI is worth it. Just my .02

Steve
08-31-2006 03:43 PM
olescarb you can't for the time being beat a modern carb set up for power but if you have the time and money port injection is a nice set up, TBI is good but the injectors have limited flow so if you build a hot engine it may be more problems than it is worth. Now for off road injection (TBI or port) is the only real option.

henry @ oles
08-31-2006 03:37 PM
Chevy39
Tune port injection vs. throttle body injection

I am building a 39 chevy sedan. I am planning on using a new 350 like came in the 94 chevrolet pickups. The 94 pickup i have gets about 18 mpg with throttle body injection. Tune port injection looks good on a street rod, but is there any advantage to it. I can get a throttle body injection system complete at a pretty cheap price, but The TPI seems to be about $300 to $400 and most of them require me to get the 90-92 computer for speed density sensor. I know that most of TPI injections i have ran across are from 305's and will need the injectors upgraded to the 350 ones. That will run over a couple hundred dollars. So is it really worth the extra money to go tune port over throttle body? I am building a driver car, not a drag car and on a limited budget. Saving money to build a new house. I am running a 700R4 from a 89 Camaro and a 3.40 gear in an 8" rear-end. Thanks for any info, Steven

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -6. The time now is 04:57 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.