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  #76 (permalink)  
Old 06-12-2010, 05:40 PM
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A little update on the build. My machinist GAVE me a set of forged vernolia either .030 or .040 over 305 pistons. They are domed pistons but have a solid dome so we put two on the lathe and cut them down to flat top. My cr should still be around 8:1 if I put a little thicker head gasket on it and unshroud the valves. I am trying to figure if I want to run a TPI or LT1 converted intake on it. I have both intakes sitting on my shelf just not sure which would be better. Either one I could run megasquirt and I will need injectors for either. I keep forgetting to take pictures as I make progress. Looks like ill be boring the block over too.

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  #77 (permalink)  
Old 06-12-2010, 07:38 PM
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You dont want to use a thick gasket. Quench needs to stay around .040 or under to help with detonation control. I think big block injectors are available for the tbi if you use it with ms.
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  #78 (permalink)  
Old 06-12-2010, 07:43 PM
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The problem with building a low-rpm turbo motor is the the engine has to rev up the make the turbos spin and make boost, i would go with a supercharger instead.
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  #79 (permalink)  
Old 06-12-2010, 07:52 PM
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Quote:
Originally Posted by bigdog7373
The problem with building a low-rpm turbo motor is the the engine has to rev up the make the turbos spin and make boost, i would go with a supercharger instead.
Not true at all. If they are sized properly and for low RPM, they will make boost as soon as the engine begins to see a load.
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  #80 (permalink)  
Old 06-12-2010, 08:08 PM
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Quote:
Originally Posted by TurboS10
You dont want to use a thick gasket. Quench needs to stay around .040 or under to help with detonation control. I think big block injectors are available for the tbi if you use it with ms.
TPI not TBI. But that would be a great idea if I was using the TBI setup.

Quote:
Originally Posted by bigdog7373
The problem with building a low-rpm turbo motor is the the engine has to rev up the make the turbos spin and make boost, i would go with a supercharger instead.
Exactly what turbos10 said. Different size turbos will make different amounts of boost at different points in the rpm range. So as said if you size the turbos to the engine they will work fine. Thats why when building a turbo engine it is critical to get a hold of the compressor maps for the turbos. This will show how much air measured in cfm, lb/min, or lb/hr the turbo can flow while creating a certain pressure ratio. I imagine these turbos will be all in around 2500rpm by seeing how small they are. I will only really know until I slap it together and see how it runs.
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  #81 (permalink)  
Old 06-12-2010, 08:23 PM
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Unless you are just dead set on twins, an HX35 would do what you want and they are available everywhere.
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  #82 (permalink)  
Old 06-12-2010, 08:24 PM
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Quote:
Originally Posted by TurboS10
Unless you are just dead set on twins, an HX35 would do what you want and they are available everywhere.
Single hx35? Yeah I guess your right two of the T25 turbos would flow about that of an hx-35. I was actually thinking about using two hx-35 on a 350 i am planning.

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  #83 (permalink)  
Old 06-13-2010, 07:25 AM
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Originally Posted by zildjian4life218
Single hx35?
It would be a less fab work with one.
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  #84 (permalink)  
Old 06-13-2010, 09:32 AM
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Quote:
Originally Posted by TurboS10
It would be a less fab work with one.
Thats true but I don't mind doing the twins. I figured for the fab work im either gonna use center dump manifolds or just flip the stock manifolds around so they face to the front. And then I will weld on some tubing that will point down and weld on a T25 flange. I will just have to keep them above the oil level.
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  #85 (permalink)  
Old 07-04-2010, 07:24 AM
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Soon ill pull the turbo apart to clean it up. Just waiting for some time. I also have to go back to the yard to get another one.
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  #86 (permalink)  
Old 07-13-2010, 03:30 PM
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I was talking the other day with some friends of mine that are big into turbo charging hondas. They said for injectors the can get a hold of 4 450cc injectors for $50 off of a DSM factory turbo car. Anyway these would work on my tpi intake? I used an online calc and found them to be 42 lb/hr which would be perfect for my build. I was wondering what I would have to worry about fitting properly. I know for the wiring connector I can just get the connectors from that car and splice them onto my harness. Not sure on the intake rail connection or where they go into the intake. Any one have any idea?
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  #87 (permalink)  
Old 07-13-2010, 09:40 PM
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Either they will fit or they will not. There is no room in between. You will need to know if they are high or low impedence as well.
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  #88 (permalink)  
Old 07-14-2010, 08:58 AM
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Quote:
Originally Posted by TurboS10
Either they will fit or they will not. There is no room in between. You will need to know if they are high or low impedence as well.
Alright thanks im gonna go through tonight and play with them and see if it works or not. Ill also post pictures of both injectors. I believe they are low impedance because when my friends use them on their hondas they have me wire in a resistor box that is used to drain off the excess current. Which would make me to believe that the factory injectors are high impedance.
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  #89 (permalink)  
Old 07-14-2010, 10:09 AM
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Quote:
Originally Posted by zildjian4life218
Alright thanks im gonna go through tonight and play with them and see if it works or not. Ill also post pictures of both injectors. I believe they are low impedance because when my friends use them on their hondas they have me wire in a resistor box that is used to drain off the excess current. Which would make me to believe that the factory injectors are high impedance.
Yes, if you are adding resistors then you are correct. Some ECU's can be set to work with lowZ without the resistors, but some require them. Depends on your end setup.
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  #90 (permalink)  
Old 07-14-2010, 10:41 AM
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Quote:
Originally Posted by TurboS10
Yes, if you are adding resistors then you are correct. Some ECU's can be set to work with lowZ without the resistors, but some require them. Depends on your end setup.
it will be a megasquirt ms2.
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