#69653 - 05/07/12 08:18 PM
Re: want to turbo my 230 I6. 15k mi. on stock rebuild
[Re: Nolando]
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tlowe #1716
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Registered: 04/01/04
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Here is the best place to get the manifolds. Probably the best price too. http://www.designengineering.com/catalog/spa-turbo-usa/turbo-manifolds/chevy A T3 will probably work fine on the little 230. I prefer a T4 for 250 and 292. They allow more choices for exh housing and turbine sizes. Snowman has just done this to his car using a 292 truck manifold and cheap Chinese turbo parts. Worked good till the stock shortblock decided not to play.
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#69699 - 05/09/12 07:56 PM
Re: want to turbo my 230 I6. 15k mi. on stock rebuild
[Re: Mean buzzen half dozen A.K.A. Hank]
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tlowe #1716
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Registered: 04/01/04
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His stock hp is 150.
Why don't you checkout getting a used carbed version of the buick 3.8 turbo setup. Easiest bolt on and will "fit " the 230 Inline.
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#69700 - 05/09/12 08:12 PM
Re: want to turbo my 230 I6. 15k mi. on stock rebuild
[Re: tlowe #1716]
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Mean buzzen half dozen A.K.A. Hank
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Registered: 09/23/04
Posts: 4546
Loc: Ca
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#69737 - 05/12/12 09:50 AM
Re: want to turbo my 230 I6. 15k mi. on stock rebuild
[Re: Nolando]
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Mean buzzen half dozen A.K.A. Hank
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Registered: 09/23/04
Posts: 4546
Loc: Ca
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The turbo in the kit is prety small. I would like you to get a turbo that has Turbine wheel diameter of @ least these measurements 61.91 /69.28 both in MM.
The one I picked out for snowman would be a better choice. http://www.godspeedproject.com/shop/index.php?main_page=product_info&cPath=10&products_id=805
On Ebay, IIRC, he got it for about $310.00? http://www.ebay.com/itm/gt35-t4-turbo-ch...d58c834&vxp=mtr Most of the T3 turbos on Ebay are too small for our 6 cylinder engines, you need to look harder to find a better sized turbo for our applications. Here is a T4 turbo w/same specs for less: US $266.35 I actually like this one better for your 230 engine. It has a devided exhaust entry, if the pic is correct. The compressor cover looks nicer also, more sturdy looking IMO. http://www.ebay.com/itm/GT35-GT-35-T4-A-...f3e57cb&vxp=mtr
The rest of the stuff in the link to the kit looks OK small intercooler. , but it is not one of the better products to use.
This kit appears to be better,,, http://www.ebay.com/itm/Universal-GT35-T...6d58d5e&vxp=mtr
BUT, the turbos turbine wheel is too small. You do not need 3" intercooler pipeing, but if you have the room to use it.
How much power do you want to make?
MBHD
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#69769 - 05/13/12 03:37 PM
Re: want to turbo my 230 I6. 15k mi. on stock rebuild
[Re: Nolando]
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Mean buzzen half dozen A.K.A. Hank
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Registered: 09/23/04
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Loc: Ca
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IIRC, you will have close to 9:5.1 compression w/the 194 cyl head. You could use it but will need to run premium gas, 91-93 octane, whatever is available. Definately need an intercooler also. Also you will be limited to how much boost you can run safely (like 6-10 PSI tops, rough estimate) If you install a methanol injection system, you could run over 10 psi, but there are a lot of variables on just how much you can safely run.
If you run the 194 head, it will give you a little pepier engine, turbo will spool-up quicker
Turbo cams are normally really smooth idle, not much valve overlap.
W/the 194 cyl head, you would install 1.85" intake valves & 1.60" exhaust valves.
Do not worry if some guys here mention to you & say the 194 cyl head is junk & the airflow is terrible,don't use it etc,, because when you are force feeding the engine such as a turbocharger, having the best flowing head is not as of great of a concern because as I mentioned just a bit ago, your engine will be forced fed.
My Syclone has I believe one of the worst flowing cyl heads Chevy ever produced, as far as the SBC & V-6 style heads are concerned. 165in/119ex flow at .500 lift @ 28 inches, & that is with 1.94" intake valve.
With that being said, the HP & torque numbers can show that the the stock 4.3 stock Syclone engine really sucks a$$ as far as cylinder head flow & a pathetic /weak camshaft. camshaft is about 173 degrees duration @ .050. When I dynoed it a few years ago running 21 psi (stock is 14 psi) it made 386 HP & 550-560 ft lbs of torque @ the wheels.
You can see it makes a lot more torque than HP & running that much boost will really show off the torque numbers as compared to the HP number.
MBHD
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#69787 - 05/13/12 09:42 PM
Re: want to turbo my 230 I6. 15k mi. on stock rebuild
[Re: CNC-Dude #5585]
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Mean buzzen half dozen A.K.A. Hank
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Registered: 09/23/04
Posts: 4546
Loc: Ca
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Camshaft was the same. Compression bump really really helped. Why wouldnt it? 10:1 to 12:1 ? If I had changed the camshaft I certainly would not have been shooting for 220-230 cranking PSI.Just a tad high to run on pump gas? I was just hoping it would not ping & detonate, no money @ that time to purchase another camshaft. I lucked out & the engine did not ping, I sorta attribute the not pinging from better fuel distribution from adding the DCOEs.
If the cylinder head was so bad,even DCOEs would not have made up the difference, right?
Like I said all a long, engine dynos does not tell everything how it is going to work in an actual car, can't bank it all on an engine dyno.
Back to the subject @ hand, the 194 head is perfectly fine for you to use,if you do not want to go crazy boosting it. Because of the compression increase.
When you have a bad flowing head, & when you force feed to engine w/a turbo or supercharge it, those deficiencies are not as apparent. You can have a horrible valve job,IE, seats too wide, incorrect angles etc,but the port windows are big enough to flow well, a turbo forcing the air fuel mixture through it will not be so relevant, have the same senario on a naturally aspirated, you are going to see big losses in power. Also if your port windows are too big, port velosity will drop & there goes your torque.
MBHD
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