400 dart shp build - Page 6 - CorvetteForum - Chevrolet Corvette Forum Discussion

Notices
C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette

400 dart shp build

Reply

 
 
 
Old 09-06-2017, 12:58 AM
  #101  
oldguy
Junior Member
 
Member Since: May 2000
Location: Hazelwood MO
Posts: 32
Thanked 4 Times in 4 Posts
Default

Originally Posted by 76strokervette View Post
Please show us both if you can.
I will do that just as soon as I get my new (un-busted) phone later today.
You can go to Summit and look up EMP/Stewart #301 for the three-hole thermo. It will work but has its own set of problems like S-L-O-W warm-up and possibly not enough heat to run your engine right.

TimAT has the answer,just a little different than than what I did.
oldguy is online now  
Reply With Quote
Old 09-06-2017, 01:15 AM
  #102  
oldguy
Junior Member
 
Member Since: May 2000
Location: Hazelwood MO
Posts: 32
Thanked 4 Times in 4 Posts
Default

Originally Posted by TimAT View Post
Could you not plumb the bypass from the top of the water pump to the unused pipe plug on the intake to the left of the thermostat?
Yes. That's the not-so-pretty way. And for the OP he has a lot of stuff in the way of a direct path to that port. Could go to a Tee on the heater feed but that's almost as hard to get to. Either way takes a lot of contortions to get around all that fuel plumbing. It can be done. He has my sympathy.
oldguy is online now  
Reply With Quote
Old 09-06-2017, 01:40 AM
  #103  
rpoL98
CF Senior Member
 
rpoL98's Avatar
 
Member Since: Jun 2005
Location: Hawaii
Posts: 421
Thanked 2 Times in 2 Posts
Default

Edelbrock water bypass kit #8095 might help, relatively low profile.

http://www.edelbrock.com/automotive/...on-items.shtml
rpoL98 is offline  
Reply With Quote
Old 09-13-2017, 02:13 PM
  #104  
Silver 7T8
CF Member
 
Silver 7T8's Avatar
 
Member Since: Apr 2006
Location: Duvall WA
Posts: 55
Thanked 2 Times in 2 Posts
Default

Hi ALL, I've been following this thread - particularly "OldGuy's" #-96 posting.
OldGuy spoke about the fact that the Dart SHP Block does not have a coolant bypass port.
What warmup &/or cooling issues might be experienced?
I am asking because I am completing a Dart SHP 400-Block based build.
A more mild build vs. OP of this thread. 374-CID, Stewart Stage-1 Water Pump, Dewitt Radiator, L82-Fan Clutch, Standard 180* Thermostat,
218*-Intake .525"/ 228*-Exhaust .525" GM Roller Hot Cam.
A TKO 5-Speed will have this Vette running at 1700-2000 RPM on the highway.
Again the question is what warmup &/ or cooling issues because of the lack of the bypass?
Silver 7T8 is offline  
Reply With Quote
Old 09-14-2017, 08:05 AM
  #105  
oldguy
Junior Member
 
Member Since: May 2000
Location: Hazelwood MO
Posts: 32
Thanked 4 Times in 4 Posts
Default

Originally Posted by Silver 7T8 View Post
Hi ALL, I've been following this thread - particularly "OldGuy's" #-96 posting.
OldGuy spoke about the fact that the Dart SHP Block does not have a coolant bypass port.
What warmup &/or cooling issues might be experienced?
I am asking because I am completing a Dart SHP 400-Block based build.
A more mild build vs. OP of this thread. 374-CID, Stewart Stage-1 Water Pump, Dewitt Radiator, L82-Fan Clutch, Standard 180* Thermostat,
218*-Intake .525"/ 228*-Exhaust .525" GM Roller Hot Cam.
A TKO 5-Speed will have this Vette running at 1700-2000 RPM on the highway.
Again the question is what warmup &/ or cooling issues because of the lack of the bypass?
"Again the question is what warmup &/ or cooling issues because of the lack of the bypass?"

With no by-pass the water pump builds pressure against the thermo.
Depending on how tight your pump is this probably will hydro-lock the pump and your belts will squueelll like a violated pig. At least mine did.
You could run it with the heater on which I did--until I got edumicated.

Now comes the booger in the Jello.

Without a by-pass there will be no coolant flow THRU the heads to heat the thermo to open. Until enough heat migrates up to the therm your temp gauge will/can/maybe spike up to 230-240 degs. Then the therm gets enough heat to open and you get a big rush of cold coolant-the therm closes-and you start the whole damn thing again. The system will equalize eventually but if you have a really efficient rad/cooling system it may never normalize. The 180 thermo will help. I think.

Here are a couple of pics of how I fixed the by-pass on my 412 SHP.
Attached Images    
oldguy is online now  
Reply With Quote
The Following User Says Thank You to oldguy For This Useful Post:
Silver 7T8 (09-14-2017)
Old 09-14-2017, 09:48 AM
  #106  
cuisinartvette
CF Senior Member
 
Member Since: Oct 2004
Location: Valencia Ca.
Posts: 65,192
Thanked 833 Times in 768 Posts
St. Jude Donor '05
Default

interesting never heard of this issue with the shp....learn something new every day
cuisinartvette is online now  
Reply With Quote
Old 09-14-2017, 10:35 AM
  #107  
claysmoker
CF Senior Member
 
claysmoker's Avatar
 
Member Since: Dec 2004
Location: PARADISE
Posts: 8,756
Thanked 46 Times in 42 Posts
St. Jude Donor '09-'11-'12-'13-'14
Default

Originally Posted by cuisinartvette View Post
interesting never heard of this issue with the shp....learn something new every day
Let's see. 5 years with an SHP blocked engine in the '64, and never encountered a single problem and I have no bypass holes in the 'stat.

Maybe just dumb luck(in my case that happens a lot!)
claysmoker is offline  
Reply With Quote
Old 09-14-2017, 10:39 AM
  #108  
claysmoker
CF Senior Member
 
claysmoker's Avatar
 
Member Since: Dec 2004
Location: PARADISE
Posts: 8,756
Thanked 46 Times in 42 Posts
St. Jude Donor '09-'11-'12-'13-'14
Default

Just a thought. Is toobroke reincarnated?
claysmoker is offline  
Reply With Quote
Old 09-14-2017, 11:47 AM
  #109  
pauldana
CF Senior Member
Support Corvetteforum!
 
pauldana's Avatar
 
Member Since: May 2003
Location: LA county ca
Posts: 9,016
Thanked 118 Times in 78 Posts
Default

Originally Posted by claysmoker View Post
Just a thought. Is toobroke reincarnated?
BHAhahahahah!!!!

Haven't heard that name in a wile..
pauldana is offline  
Reply With Quote
Old 09-14-2017, 06:16 PM
  #110  
claysmoker
CF Senior Member
 
claysmoker's Avatar
 
Member Since: Dec 2004
Location: PARADISE
Posts: 8,756
Thanked 46 Times in 42 Posts
St. Jude Donor '09-'11-'12-'13-'14
Default

Originally Posted by pauldana View Post
BHAhahahahah!!!!

Haven't heard that name in a wile..
^^^^^^^^^^Probably a good thing Paul, we've been fortunate
claysmoker is offline  
Reply With Quote
Old 09-15-2017, 01:09 AM
  #111  
Metalhead140
CF Senior Member
 
Metalhead140's Avatar
 
Member Since: Aug 2015
Location: NSW, Australia
Posts: 1,389
Thanked 234 Times in 207 Posts
Default

Why not just drill a couple of holes in the stat, you'll be less likely to get an air lock when filling too? I have a couple of small holes drilled in the stats on all my modified older cars, it will also slow the onset of overheating (giving you more time to notice/respond) if the stat fails shut. Unless you regularly drive your car for very short distances/times then I don't see much downside.
Metalhead140 is offline  
Reply With Quote
The Following User Says Thank You to Metalhead140 For This Useful Post:
Silver 7T8 (09-15-2017)
 
 
 


Thread Tools
Search this Thread
Quick Reply: 400 dart shp build


Sponsored Ads
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: