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manifold bypass

  
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manifold bypass

 
Shrike Shrike
New User | Posts: 26 | Joined: 03/12
Posted: 06/29/13
09:37 AM

Have a gm383zz crate motor with a gm alum high rise intake. This manifold doesnot have any water jacket for the rear cyl.(7&8) The holes in the heads are plugged off. Is this the way to go or do I need to run some type of bypass hoses. Engine runsabout 190 degrees on a 90 degree day                                   Shriker  

redneckjoe69 redneckjoe69
Addict | Posts: 2337 | Joined: 03/10
Posted: 06/29/13
04:08 PM

as far as i know, no smallblock manifolds transfer water from the rear side.   its all done up front.   i wouldnt worry about it.  

68scott385 68scott385
Guru | Posts: 1990 | Joined: 10/09
Posted: 06/29/13
04:21 PM

+1

Temp sounds good too. I wouldn't worry about it either.  
68scott385 68scott385 68scott385

pepsi1 pepsi1
Guru | Posts: 1718 | Joined: 09/11
Posted: 06/30/13
04:14 AM

I agree with RedneckJoe. On our race engines we tap the rear and make a crossover for the coolant to circulate, If you do that be carefull you get the the crossover fittings in the center of the manifold and head. Or you just wasted time and money, Your coolant temperature is fine @ 190*. You can use a 5/8" to 3/4" crossover fitting if you decide to the crossover. You can make a template
  Small blocks are a well designed little air pump. Just a little FYI: The temperature will vary if you use the head or the intake for your sensor. If you use the head the temperature maybe higher....Have fun!

Bob  

pepsi1 pepsi1
Guru | Posts: 1718 | Joined: 09/11
Posted: 06/30/13
04:18 AM

I agree with REDNECKJOE. There really is NO need to make a crossover on the rear of your intake manifold. On our race engine we run a crossover on the rear.
  Your engine temperature is fine at 190* Have Fub,,,,,

Bob  

pepsi1 pepsi1
Guru | Posts: 1718 | Joined: 09/11
Posted: 06/30/13
04:21 AM

This site is really in need of some help. I posted an answer it dissapeared. So I reanswered and it double posted.

Bob  

skyeking skyeking
Addict | Posts: 2738 | Joined: 08/09
Posted: 06/30/13
05:02 PM

Hi Bob,
The 190* is just fine for my ZZ4 //#350cu in 355hp..
I also run run twin fans inboard that have lasted
over 6 years without any traumas...Why bother???  
skyeking

Shrike Shrike
New User | Posts: 26 | Joined: 03/12
Posted: 07/01/13
04:18 AM

Thanks a lot guys. Looks like I was concerned over nothing. I did find the directions that came with the intake manifold and they said to do the by-pass. I guess as long as the temps are o-k I`m o-k                            Shriker