Want to put a turbo on a 305 chevy - Page 3 - 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
  #31 (permalink)  
Old 09-30-2013, 07:31 PM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 29
Posts: 9,487
Wiki Edits: 0

Thanks: 20
Thanked 390 Times in 366 Posts
Go with a Bosch 044 fuel pump. But ditto the above post. It's not rocket science.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #32 (permalink)  
Old 09-30-2013, 08:16 PM
Registered User
 
Join Date: Sep 2005
Location: Orange CA
Posts: 17
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by bygddy View Post
I'm sure its not proper etiquette but if your doing a TPI 305 turbo build, you really need to spend some time on thirdgen.org
Another good site is http://www.theturboforums.com/
There are many many 305 builds, many stone stock builds making stupid power, including my all time fav "the grenade" thread.....
Your goals are easily acheivable using a simpe eBay turbo, eBay inercooler, walbro fuel pump, injectors and tune. Nothing more....
Its actually that simple.....the issues always arise when the tune is wrong, or oil feed, oil drain, etc.....these are the reasons guys break stuff. Find a tuner in your area with knowledge of gm's TPI motors, one that has done turbo tune's before....again, thirdgen.org can help you here.
Thanks, I've been on thirdgen.org. So you guys are saying with the stock motor and the correct turbo and tune I could be at 350 hp? No cam/head/lower the comp ratio neccessary? Just upgraded fuel system and ebay turbos?
Reply With Quote Quick reply to this message
  #33 (permalink)  
Old 09-30-2013, 08:20 PM
Proud LOSER
 
Last photo:
Join Date: Mar 2008
Location: Ottawa
Posts: 2,091
Wiki Edits: 0

Thanks: 82
Thanked 322 Times in 278 Posts
Quote:
Originally Posted by robyyo View Post
Thanks, I've been on thirdgen.org. So you guys are saying with the stock motor and the correct turbo and tune I could be at 350 hp? No cam/head/lower the comp ratio neccessary? Just upgraded fuel system and ebay turbos?
The right sized turbo, an eBay intercooler, the right fuel supply and tune.
350hp? Sure, if you ran it with a couple plug wires off lol.
Reply With Quote Quick reply to this message
  #34 (permalink)  
Old 09-30-2013, 08:57 PM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 29
Posts: 9,487
Wiki Edits: 0

Thanks: 20
Thanked 390 Times in 366 Posts
Quote:
Originally Posted by robyyo View Post
Thanks, I've been on thirdgen.org. So you guys are saying with the stock motor and the correct turbo and tune I could be at 350 hp? No cam/head/lower the comp ratio neccessary? Just upgraded fuel system and ebay turbos?
A lot of people like spending other people's money. A mild cam would help but even that isn't needed. I would just get a cheap white box RV cam, they're like 75 bucks for the kit.

Leave the rest of the engine alone.
Reply With Quote Quick reply to this message
  #35 (permalink)  
Old 09-30-2013, 10:33 PM
Registered User
 
Last photo:
Join Date: Dec 2012
Location: Binghamton, NY
Posts: 411
Wiki Edits: 0

Thanks: 94
Thanked 80 Times in 75 Posts
Robyyo, my son and I are in the part gathering process for a rear turbo setup on a 327 TPI motor. I was planning on starting a thread with some questions, so I'll ask them on this thread as you have a relativley similar setup. I don't want to upset the apple cart though by hijacking the thread!

What do you guys think in terms of pipe size to the intake from the rear of the car? Smaller is better for me due to space limitations but I don't want to limit the amount of air flow below what out stock TPI throttle body will handle. I would use 2" if it would work, but I could use 2.5" if needed.

F-bird mentioned that the rear turbo will cool the intake charge enough to eliminate the need for a CAC; if we keep the boost in the 6-10 psi range will the intake charge be cool enough?

We are using a Comp 12-236-12 cam with ported stock 70cc heads with 1.94/1.50 valves; CR is 8.95:1 and we running forged Probe flat tops. We have an adjustable fuel pressure regulator and are using 27 lb/hr injectors and controlling it with an aftermarket controller(ecm). Will we be alright with 93 octane? Or to what boost level will be OK with 93 octane?

Tech, hopefully you consider the 327 one step ahead of a 'fosdick' (where do you come up with this stuff)
Reply With Quote Quick reply to this message
  #36 (permalink)  
Old 10-01-2013, 06:02 AM
Registered User
 
Last photo:
Join Date: Dec 2012
Location: Binghamton, NY
Posts: 411
Wiki Edits: 0

Thanks: 94
Thanked 80 Times in 75 Posts
The heads are 185. They have 1.94 intakes and are quite heavily ported. The throats were cut and they have a 4 angle valve job done. They were machined for larger springs and positive valve seals. I have to admit that in hindsight, we should've bought a different set of heads instead of putting the $ into these ones, but, live and learn.

Any thoughts on boost level on pump gas (93)?
Reply With Quote Quick reply to this message
  #37 (permalink)  
Old 10-01-2013, 08:39 PM
cal1320's Avatar
Registered User
 
Last photo:
Join Date: Dec 2010
Location: central FL
Posts: 259
Wiki Edits: 0

Thanks: 1
Thanked 14 Times in 13 Posts
Read this thread. It's 164 pages of TPI induction with twin turbos on a cast piston, cast crank $300 junkyard 350 grenade (it never did blow up). What worked, what didn't, mega HP and Torque on a very small budget. An amazing journey into the turbo world. It's very long, but well worth the read. http://www.theturboforums.com/thread...part-2-to-come
Reply With Quote Quick reply to this message
The Following User Says Thank You to cal1320 For This Useful Post:
64nailhead (10-02-2013)
  #38 (permalink)  
Old 10-01-2013, 10:34 PM
Proud LOSER
 
Last photo:
Join Date: Mar 2008
Location: Ottawa
Posts: 2,091
Wiki Edits: 0

Thanks: 82
Thanked 322 Times in 278 Posts
Quote:
Originally Posted by cal1320 View Post
Read this thread. It's 164 pages of TPI induction with twin turbos on a cast piston, cast crank $300 junkyard 350 grenade (it never did blow up). What worked, what didn't, mega HP and Torque on a very small budget. An amazing journey into the turbo world. It's very long, but well worth the read. http://www.theturboforums.com/thread...part-2-to-come
See post#40...
Marty's experience is certainly not the norm, and its always the guys who don't actually care if they break parts that seem to do well when pushing the envelope. The thread does offer alot of insight into "doing lots for very little" and is a very entertaining read. Again, not even in the realm of normal but offers a lot of good info.
Reply With Quote Quick reply to this message
  #39 (permalink)  
Old 10-01-2013, 10:39 PM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 29
Posts: 9,487
Wiki Edits: 0

Thanks: 20
Thanked 390 Times in 366 Posts
Not in the realm of normal... Because? Oh, he had a good tune. There's no magic or hocus pocus.
Reply With Quote Quick reply to this message
  #40 (permalink)  
Old 10-01-2013, 10:59 PM
Proud LOSER
 
Last photo:
Join Date: Mar 2008
Location: Ottawa
Posts: 2,091
Wiki Edits: 0

Thanks: 82
Thanked 322 Times in 278 Posts
Quote:
Originally Posted by ap72 View Post
Not in the realm of normal... Because? Oh, he had a good tune. There's no magic or hocus pocus.
No no lol, more so there is a limit to what a "stock" lower end will take.....and he didn't always have a good tune, he almost hurt it several times....that's what I meant by "the norm"....hey, im on your side here lol, we have several younger guys around here running big HP on stock parts with boost..... I have ridden in an 80's G-body with a baby LS and twins that puts down 700+ to the ground and the motors a $700 junkyard piece with 80000km on it.....its disgusting really lol.....when the tune is right, its incredible what a turbo motor will take over a N/A screamer, supercharging or spray.....its by far the easiest on parts.
Reply With Quote Quick reply to this message
  #41 (permalink)  
Old 10-01-2013, 11:09 PM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 8,685
Wiki Edits: 0

Thanks: 367
Thanked 865 Times in 827 Posts
do the math on any engine combination,then look where most failures occur?and what causes the failure? Then look at diesel technology,,,,,
fill in the blanks yourself
Reply With Quote Quick reply to this message
  #42 (permalink)  
Old 10-02-2013, 03:15 AM
Registered User
 
Last photo:
Join Date: Dec 2012
Location: Binghamton, NY
Posts: 411
Wiki Edits: 0

Thanks: 94
Thanked 80 Times in 75 Posts
Quote:
Originally Posted by cal1320 View Post
Read this thread. It's 164 pages of TPI induction with twin turbos on a cast piston, cast crank $300 junkyard 350 grenade (it never did blow up). What worked, what didn't, mega HP and Torque on a very small budget. An amazing journey into the turbo world. It's very long, but well worth the read. http://www.theturboforums.com/thread...part-2-to-come
Big read is an understatement! It's 164 pages (not posts - PAGES!). I'm upto page 40 and it, if nothing else, is entertaining. Also, it is making me feel better about trying a 5-8 psi setup without catastrophic results.

I still haven't found much about plugs, hotter or colder, and timing, more or less with boost. I'm quite familiar with intake temps and what needs to be done with the timing as temps go up, but??

Still reading, still learning. Thanks for the link.
Reply With Quote Quick reply to this message
  #43 (permalink)  
Old 10-02-2013, 08:26 AM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 29
Posts: 9,487
Wiki Edits: 0

Thanks: 20
Thanked 390 Times in 366 Posts
Quote:
Originally Posted by vinniekq2 View Post
do the math on any engine combination,then look where most failures occur?and what causes the failure? Then look at diesel technology,,,,,
fill in the blanks yourself
typically ring lands, and detonation causes it.

Not really related to diesel technology at all considering how a diesel operates.
Reply With Quote Quick reply to this message
  #44 (permalink)  
Old 10-02-2013, 08:36 AM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 8,685
Wiki Edits: 0

Thanks: 367
Thanked 865 Times in 827 Posts
AP72,you missed the point totally,and I am surprised,,,
think more along the high RPM and high heat combination.
A lower RPM turbo seems to last longer than a high RPM N.A. engine making the same power.

A diesel is low RPM,rarely has valve train problems
diesels use high boost and rarely have sealing issues
you can add to this
Reply With Quote Quick reply to this message
  #45 (permalink)  
Old 10-02-2013, 09:02 AM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 29
Posts: 9,487
Wiki Edits: 0

Thanks: 20
Thanked 390 Times in 366 Posts
Quote:
Originally Posted by vinniekq2 View Post
AP72,you missed the point totally,and I am surprised,,,
think more along the high RPM and high heat combination.
A lower RPM turbo seems to last longer than a high RPM N.A. engine making the same power.

A diesel is low RPM,rarely has valve train problems
diesels use high boost and rarely have sealing issues
you can add to this
Valvetrain issues are completely separate from turbo issues, and are usually RPM related, as you noted.

Diesels rarely have sealing issues because the blocks, heads, and usually head bolts are designed to take much higher pressures than most gas engines, this is less related to the turbo and more related to how a diesel works and is subsequently designed.

FWIW there are some "higher" rpm diesels out there. And LOW rpm is usually the area where detonation is hardest to control for a gas engine, so you have to trade valvetrain stability for detonation resistance.

At this "back yard hotrodder" level you're way over thinking it though. Good turbo selection, intercooling, and tune are the 3 areas of highest concern. Hit those three and you should be alright with a conversion of most factory NA engines.

These power levels seem high for a stock SBC but consider that many 4 banger guys are making 300-400hp with slapping a turbo on a ~2.0L engine, that puts a 5.0L sbc in the 750+hp range. And I'm not referring to just 4 valve dohc engines, 2 valve sohc engines in that area are making that power too, on stock long blocks, usually on E85, and sometimes 93 octane.
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
Can I put a turbo 350 in place of 700r4? eric32 Transmission - Rearend 7 08-23-2008 02:51 AM
chevy 305 stock,ported polished, Holset H1E turbo. 74chevyflat Engine 19 06-02-2008 05:03 PM
how to put a turbo on a sb 400 mrbull30 Engine 10 04-20-2007 05:11 PM
Can you put a 350 transmission on a 305. CCR Transmission - Rearend 7 04-28-2005 04:41 PM
What are the best heads to put on a 305? CCR Engine 6 11-06-2004 02:50 PM


All times are GMT -6. The time now is 12:12 PM.


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.