383 stroker chevy camshaft - Page 4 - Hot Rod Forum : Hotrodders Bulletin Board
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
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #46 (permalink)  
Old 05-08-2013, 11:09 AM
Gumvbo's Avatar
Registered User
 
Join Date: May 2013
Posts: 6
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Hogg View Post

The stock CSFI poppets flow at 23.4 lb/hr@63 psi of fuel pressure. This will support about 330rwhp or about 390-400hp at the crank at the crank.
Then should I assume no modification is required to the fuel pump in order to increase fuel pressure to the injectors ?
Sorry I'm stupid, but don't have a clue how TPI works.
I know on TBI's you have to increase fuel pressure and the injectors flow as you increase the power of the motor.
Don't have an idea what the fuel delivery requirements are on this setup though, it's kind of a hybrid and so torquey with relatively mild HP output....
500cfm is not much, little more than stock....

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #47 (permalink)  
Old 05-09-2013, 04:38 AM
lollo's Avatar
Registered User
 
Last photo:
Join Date: May 2013
Location: Milano
Posts: 32
Wiki Edits: 0

Thanks: 2
Thanked 0 Times in 0 Posts
Hi hog, Which kind of 500 TPI intake did you suggest?
Reply With Quote Quick reply to this message
  #48 (permalink)  
Old 05-10-2013, 12:02 PM
Registered User
 
Last photo:
Join Date: Nov 2006
Location: Woodstock
Posts: 991
Wiki Edits: 0

Thanks: 2
Thanked 89 Times in 81 Posts
Quote:
Originally Posted by Gumvbo View Post
Lollo if you think you can modify the intake manifold to accept the LPG injectors then forget the Edelbrock and go with the TPI.....

@Hog, how about the ECM to run the TPI ? Will the stock ECM do the job or an aftermarket unit is required ?
Stock PCM can control any high impedance injector, but will require reprogramming as with any non stock application.

peace
Hog
Reply With Quote Quick reply to this message
  #49 (permalink)  
Old 05-10-2013, 12:07 PM
Registered User
 
Last photo:
Join Date: Nov 2006
Location: Woodstock
Posts: 991
Wiki Edits: 0

Thanks: 2
Thanked 89 Times in 81 Posts
Quote:
Originally Posted by Gumvbo View Post
Then should I assume no modification is required to the fuel pump in order to increase fuel pressure to the injectors ?
Sorry I'm stupid, but don't have a clue how TPI works.
I know on TBI's you have to increase fuel pressure and the injectors flow as you increase the power of the motor.
Don't have an idea what the fuel delivery requirements are on this setup though, it's kind of a hybrid and so torquey with relatively mild HP output....
500cfm is not much, little more than stock....
The reason people are increasing fuel presure on TBI units is because they are not using larger injectors coupled with reprogramming the ECM.

If you are just bumping up power a conservative amount, the the stock pump and fuel system will be fine for gasoline use.

You dont require a huge amount of flow with power peaks at 3000rpm and torque peaks at 2000rpm.

peace
Hog
Reply With Quote Quick reply to this message
  #50 (permalink)  
Old 05-10-2013, 01:30 PM
Registered User
 
Last photo:
Join Date: Nov 2006
Location: Woodstock
Posts: 991
Wiki Edits: 0

Thanks: 2
Thanked 89 Times in 81 Posts
Quote:
Originally Posted by lollo View Post
Hi hog, Which kind of 500 TPI intake did you suggest?
Any stock TPI setup would be fine. I have no idea what a stock TPI setup flows though, but stock Chevrolet Tuned Port Injection provides superior mid rpm torque. They were available on 1985-1992 V8 Camaro's/Firebirds and 1985-1991 V8 Corvettes.

The 500cfm number is mentioned only because that number was quoted from the power/torque simulation.

peace
Hog
Reply With Quote Quick reply to this message
  #51 (permalink)  
Old 05-10-2013, 06:26 PM
lollo's Avatar
Registered User
 
Last photo:
Join Date: May 2013
Location: Milano
Posts: 32
Wiki Edits: 0

Thanks: 2
Thanked 0 Times in 0 Posts
Thanks Hog!!
I'm looking for TPI! new is a little expensive, did you think that a good used will work properly?
Reply With Quote Quick reply to this message
  #52 (permalink)  
Old 05-10-2013, 07:02 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,321
Wiki Edits: 326

Thanks: 839
Thanked 1,153 Times in 952 Posts
Quote:
Originally Posted by Hogg View Post
The 500cfm number is mentioned only because that number was quoted from the power/torque simulation.
I know absolutely nothing about any kind of electronic fuel injection and simply pulled the 500 figure out of the air because it was enough to get the job done.
Reply With Quote Quick reply to this message
  #53 (permalink)  
Old 05-11-2013, 09:43 AM
Registered User
 
Last photo:
Join Date: Nov 2006
Location: Woodstock
Posts: 991
Wiki Edits: 0

Thanks: 2
Thanked 89 Times in 81 Posts
Quote:
Originally Posted by lollo View Post
Thanks Hog!!
I'm looking for TPI! new is a little expensive, did you think that a good used will work properly?
Of course, a good used setup will work just great. You can get a new set of injectors or get used ones cleaned, flow tested so you know you are woking with good parts.

I had a set reworked and they edned up flowing 25 lb/hr at 43.5psi, which is roughly 28.? at my 58 psi of fuel pressure.

You need to have the ECM match the calibration in the ECM.

Stock 305 TPI is 19 lb/hr and 350 TPI is 22 lb/hr IIRC. The fuel pressures were different between teh 2 as well.

The only mechanical differnce between a 305 and 350 TPI setup is the injectors size.

peace
Hog
Reply With Quote Quick reply to this message
  #54 (permalink)  
Old 05-11-2013, 01:38 PM
lollo's Avatar
Registered User
 
Last photo:
Join Date: May 2013
Location: Milano
Posts: 32
Wiki Edits: 0

Thanks: 2
Thanked 0 Times in 0 Posts
Thank you very much Hog!
I will buy news injectors, I think around 30 lb/hr.
the intake will be used if I will win bidding on ebay.
I know that there is a little difference in the center bolt between old style an 86 and later manifolds.
Did you think easy to work on manifold to fit the heads?
Please, tell me more about ECM.
Thanx
Reply With Quote Quick reply to this message
  #55 (permalink)  
Old 05-11-2013, 05:20 PM
lollo's Avatar
Registered User
 
Last photo:
Join Date: May 2013
Location: Milano
Posts: 32
Wiki Edits: 0

Thanks: 2
Thanked 0 Times in 0 Posts
Hi Guys,
I would buy thi heads gaskets :
Fel Pro#375-1094

Embossed Shim Head Gasket
Small Block Chevy
Bore 4.100''
Compressed Thickness .015''
Compressed Volume 3.2cc

Did you suggest this kind of gasket? 4.100 is good for a 4.030 piston size? or did you think that I have to go to 4.060 gasket bore?

Thanx
Reply With Quote Quick reply to this message
  #56 (permalink)  
Old 05-20-2013, 02:20 PM
lollo's Avatar
Registered User
 
Last photo:
Join Date: May 2013
Location: Milano
Posts: 32
Wiki Edits: 0

Thanks: 2
Thanked 0 Times in 0 Posts
Hi all,
well, I've bought TPI system !!
I'm waiting for response by Rogers performance about EQ heads! (two weeks of silence!!??)
Anyone knows similar heads, maybe Dart or others that have 76cc combustion chamber, 167cc intake runners, 2.02in. valve, 1.60ex. valve ??
Did you think that the Techinspector1's dyno chart will change with different brand of heads ??
Heads are the last parts that I need to buy, then I will ship all the parts to Italy and build the engine!
Thank you to everybody for your support and help!
Lollo
Reply With Quote Quick reply to this message
  #57 (permalink)  
Old 05-20-2013, 03:06 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,321
Wiki Edits: 326

Thanks: 839
Thanked 1,153 Times in 952 Posts
Quote:
Originally Posted by lollo View Post
Did you think that the Techinspector1's dyno chart will change with different brand of heads ??
Any cylinder heads that will flow about the same as the EQ heads will produce the same or very close to the same results. The key to the whole combination working well is to use large combustion chambers to make a pump-gas-friendly static compression ratio, used with small volume intake runners, so that high intake velocity will pack the cylinders at low rpm's.
Reply With Quote Quick reply to this message
  #58 (permalink)  
Old 05-20-2013, 03:15 PM
lollo's Avatar
Registered User
 
Last photo:
Join Date: May 2013
Location: Milano
Posts: 32
Wiki Edits: 0

Thanks: 2
Thanked 0 Times in 0 Posts
Thank you very much Techinspector1 !!!
i will look for similar heads!!
Reply With Quote Quick reply to this message
  #59 (permalink)  
Old 06-13-2013, 05:46 AM
lollo's Avatar
Registered User
 
Last photo:
Join Date: May 2013
Location: Milano
Posts: 32
Wiki Edits: 0

Thanks: 2
Thanked 0 Times in 0 Posts
Finally I've bought World product S/R Torquer heads!!!
Are similar as EQ, 170cc intake runner, 76cc combustion chamber.
I need to buy more others parts, as pushrods, retainers, oil pump, oil pan, timing chain, water pump, gas pump, distributor, headers, etc. etc.
Did you think I can reuse some parts from my 350 vortec or is better to buy all new??
Actually I have:
short block
heads
camshaft
heads gaskets
Roller rocker arms
TPI system
Heads covers

Last week I won 500$ shipping discount from USA in a truck contest here in Italy, so I can spend a little more for this engine if needed.
Thanks for suggestions!!
Reply With Quote Quick reply to this message
  #60 (permalink)  
Old 11-19-2013, 08:00 AM
lollo's Avatar
Registered User
 
Last photo:
Join Date: May 2013
Location: Milano
Posts: 32
Wiki Edits: 0

Thanks: 2
Thanked 0 Times in 0 Posts
Hi guys, I'm back!!
I'm working on the engine now only because I had to wait for the delivery of many parts, also some I'll have to replace them because they do not correspond to my needs.
I am currently working on the heads and I need some advice.
With the hydraulic lifter how can I measure the correct length pushrods?
I believe that the correct method is to fix the roller rocker by hand (turning the bolt with fingers) and give it an half turn more and then verify that the adjustable pushrod make work the rocker arm at the center of the valve tip.
What would you do?
thanks
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

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:
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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
selecting a camshaft for a street 383 chevy?? demarques_191 Hotrodding Basics 2 05-03-2013 07:51 PM
Which Camshaft is better for the Street on a chevy 383? demarques_191 Engine 14 02-07-2013 07:12 AM
Break-in oil for a ROLLER camshaft equipped 383 stroker? 383SBC Engine 9 02-16-2011 03:09 PM
?'s on a 383 stroker chevy... gofastz Engine 3 11-09-2010 05:58 PM
383 stroker chevy brainsboy Engine 2 04-09-2004 10:10 AM


All times are GMT -6. The time now is 04:27 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.