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Pro Flo XT because HSR is out of stock

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Old Mar 11, 2021 | 10:12 PM
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Pro Flo XT because HSR is out of stock

I've been waiting for a HSR since October. Every time it is supposed to be in stock they push it back 2 weeks or a month.

The latest date is March 15th and if it is not back in stock I am going to order the Edelbrock Pro Flo XT.

For a very mild 383 would I be giving any performance up by going with the Pro Flo XT over the HSR?
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Old Mar 20, 2021 | 01:02 AM
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Re: Pro Flo XT because HSR is out of stock

Pro Flo XT on its way..
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Old Mar 20, 2021 | 08:17 AM
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Re: Pro Flo XT because HSR is out of stock

Let us know how it goes. I thought about going that direction.
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Old Mar 20, 2021 | 09:15 AM
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Re: Pro Flo XT because HSR is out of stock

I think they would be pretty close. Have to see how big the ports are and if they can be matched to the heads
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Old Mar 20, 2021 | 11:47 AM
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Re: Pro Flo XT because HSR is out of stock

Originally Posted by Chopski
Let us know how it goes. I thought about going that direction.
Originally Posted by Orr89RocZ
I think they would be pretty close. Have to see how big the ports are and if they can be matched to the heads
I have done countless hours of research over the last couple weeks. Many people say the ports are small and not much metal can be removed. Edelbrock lists the equivalent of the 1205 intake gasket as the recommended gasket. They also state the runners are tapered. I've learned that flow isn't the end all of numbers to achieve with engine parts. A few years ago my friends brother who owns a speed shop and has a flow bench, ported small block ford AFR 205cc heads. He ended up adding epoxy to the intake ports to create a very high velocity. In the end the heads measured out smaller than 205cc but flowed more than stock.

I don't think I am going to run a LS style throttle body, but I might. If I stick with the TPI style of throttle body, mostly for throttle cable and TV cable, I will make a adapter like this one: https://www.corvetteforum.com/forums...ttle-body.html
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Old Mar 20, 2021 | 08:32 PM
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Re: Pro Flo XT because HSR is out of stock

There was a thread here on the pro flo and porting it. I am pretty sure you can get 1205 on it, and thats plenty for good hp
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Old Mar 22, 2021 | 09:56 AM
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Re: Pro Flo XT because HSR is out of stock

It's getting closer!! Should be delivered in the next day or 2!

I don't know if I will end up doing any porting. The engine is only designed to make 400 +/- hp by 5500 ish RPMs.

I will see how it lines up with the AFR as cast 195cc heads.
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Old Mar 22, 2021 | 12:16 PM
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Re: Pro Flo XT because HSR is out of stock

I just sold my miniram on ebay. I understand TPIS is back ordered on these too. I guess not everyone is going LSx.

I'm going backwards lol, I'm putting together a dual plane with a holley sniper and V belts for my current build.

-- Joe
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Old Mar 22, 2021 | 12:22 PM
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Re: Pro Flo XT because HSR is out of stock

https://www.thirdgen.org/forums/alte...-pro-flow.html

just a few posts down from yours

basically seems to be small at 1.99x1.49 out the box, good for stock heads

can be opened to 1205 which is about afr195 size
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Old Mar 23, 2021 | 12:31 PM
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Re: Pro Flo XT because HSR is out of stock

It's here! 28 days early from Amazon first told me, lol. I knew it would be here quicker when last Friday it showed shipped and arrived in Canada.

THE BEST PART is I used amazon.ca since I am in Canada. The price was $503 CAD with free prime delivery. I think they must have screwed up the USD/CAD pricing.

The ports are small, but not much different that the AFR as cast 195 heads. The width is pretty much the same and just a tiny bit shorter. I wouldn't do more than a light gasket match, and for my needs I could probably run as is.






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Old Mar 23, 2021 | 01:59 PM
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Re: Pro Flo XT because HSR is out of stock

Originally Posted by 89fast5oh
It's here! 28 days early from Amazon first told me, lol. I knew it would be here quicker when last Friday it showed shipped and arrived in Canada.

THE BEST PART is I used amazon.ca since I am in Canada. The price was $503 CAD with free prime delivery. I think they must have screwed up the USD/CAD pricing.

The ports are small, but not much different that the AFR as cast 195 heads. The width is pretty much the same and just a tiny bit shorter. I wouldn't do more than a light gasket match, and for my needs I could probably run as is.

I was looking at those Enforcer heads from AFR. Same casting as liberty and other chinese heads. I hear the AFR springs and valves are better though.

Can you snap a few pictures of what it looks like inside the runner? Curious how far they can be ported.

-- Joe
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Old Mar 23, 2021 | 02:06 PM
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Re: Pro Flo XT because HSR is out of stock

Mocking up LT1 fuel rails. I am too cheap to buy fuel rails. I got these for free. I would just need to weld shut the front crossover and then drill/tap or weld threaded bungs into the ends. I can even use the fuel pressure regulator as long as its the right fuel pressure. I will have to look that up.






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Old Mar 23, 2021 | 02:12 PM
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Re: Pro Flo XT because HSR is out of stock

Originally Posted by anesthes
I was looking at those Enforcer heads from AFR. Same casting as liberty and other chinese heads. I hear the AFR springs and valves are better though.

Can you snap a few pictures of what it looks like inside the runner? Curious how far they can be ported.

-- Joe
Pics of the intake or head runner?

Here is the heads starting at post #24 https://www.thirdgen.org/forums/memb...ml#post6403622
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Old Mar 23, 2021 | 06:32 PM
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Re: Pro Flo XT because HSR is out of stock

LT1 fuel rails modified and mocked up with old injectors.






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Old Mar 23, 2021 | 09:48 PM
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Re: Pro Flo XT because HSR is out of stock





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Old Mar 24, 2021 | 10:27 AM
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Re: Pro Flo XT because HSR is out of stock

When I used modified LT1 rails I was concerned about tapping them, so I welded the mail ends on. The casting is just really thin, although I was probably just being paranoid.

Looking good!

Looked at the link you provided for the enforcer heads. It does look like they can be ported quite a bit, and the guide area re-worked. Probably a good deal for the money. I might try a set eventually.

-- Joe
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Old Mar 24, 2021 | 10:56 AM
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Re: Pro Flo XT because HSR is out of stock

Originally Posted by anesthes
When I used modified LT1 rails I was concerned about tapping them, so I welded the mail ends on. The casting is just really thin, although I was probably just being paranoid.

Looking good!

Looked at the link you provided for the enforcer heads. It does look like they can be ported quite a bit, and the guide area re-worked. Probably a good deal for the money. I might try a set eventually.

-- Joe
I picked up a couple more fittings but still need 1 more 90* swivel which will be in on Friday. Once I get it together I will pressure test it. If the threaded fittings leak I will weld them in.
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Old Mar 25, 2021 | 10:22 AM
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Re: Pro Flo XT because HSR is out of stock

Originally Posted by 89fast5oh
I picked up a couple more fittings but still need 1 more 90* swivel which will be in on Friday. Once I get it together I will pressure test it. If the threaded fittings leak I will weld them in.
I'm sure they will be fine. I just got nervous for no reason.

I imagine you did the 9/16 or 14mm oring right?

-- Joe
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Old Mar 27, 2021 | 11:19 AM
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Re: Pro Flo XT because HSR is out of stock

Originally Posted by anesthes
I'm sure they will be fine. I just got nervous for no reason.

I imagine you did the 9/16 or 14mm oring right?

-- Joe
The fittings into the fuel rail were 3/8" NPT
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Old Mar 28, 2021 | 03:45 PM
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Re: Pro Flo XT because HSR is out of stock

Fuel crossover done and pressure tested.



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Old Mar 29, 2021 | 07:11 AM
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Re: Pro Flo XT because HSR is out of stock

So how are you bolting the rails down to manifold?
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Old Mar 29, 2021 | 07:33 AM
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Re: Pro Flo XT because HSR is out of stock

Originally Posted by Orr89RocZ
So how are you bolting the rails down to manifold?
I made 4 strips of metal with a bend on the top end. They sit against the intake fuel rail mounting pad, then the bend goes along with the factory shape of the LT1 fuel rails. They are secured to the intake with 2 screws each and then a bolt through the existing hole in the fuel rail. I will get some pictures later.
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Old Mar 29, 2021 | 08:36 PM
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Re: Pro Flo XT because HSR is out of stock




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Old Jun 15, 2021 | 10:46 AM
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Re: Pro Flo XT because HSR is out of stock

This project is still moving along, even though the HSR is now back in stock 8 months later. lol.
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Old Jun 15, 2021 | 01:10 PM
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Re: Pro Flo XT because HSR is out of stock

Got to work on the TPI throttle body adapter. Ideas borrowed directly from Dave_85 on corvetteforum. https://www.corvetteforum.com/forums...ttle-body.html

Looking at the pictures I stuck the TB gasket on backwards.






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Old Jun 22, 2021 | 01:01 PM
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Re: Pro Flo XT because HSR is out of stock

The adapter plate is done.






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Old Jun 23, 2021 | 10:34 AM
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Re: Pro Flo XT because HSR is out of stock

Why not just go with an ls1 throttle body like the manifold was made for? I'm no expert but I would assume the tpi throttle body on that intake would be a big bottleneck
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Old Jun 23, 2021 | 11:06 AM
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Re: Pro Flo XT because HSR is out of stock

Originally Posted by dbrochard
Why not just go with an ls1 throttle body like the manifold was made for? I'm no expert but I would assume the tpi throttle body on that intake would be a big bottleneck
You have to use edelbrock's $500 throttle body that doesn't have a spot for a TV cable. Or a LS1 throttle body and a adapter plate, also the throttle body does not have a spot for a TV cable.
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Old Jun 23, 2021 | 11:44 AM
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Re: Pro Flo XT because HSR is out of stock

Wow they make it difficult. Any reason you chose just the manifold over doing the entire pro flo xt self tuning kit? I think they go for around $1800 but that includes throttle body, fuel rails, injectors, harness, computer
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Old Jun 23, 2021 | 11:58 AM
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Re: Pro Flo XT because HSR is out of stock

Originally Posted by dbrochard
Wow they make it difficult. Any reason you chose just the manifold over doing the entire pro flo xt self tuning kit? I think they go for around $1800 but that includes throttle body, fuel rails, injectors, harness, computer
Budget, TV cable and pro flo xt self tuning kit doesn't control torque converter lock up.
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Old Jul 21, 2021 | 01:03 PM
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Re: Pro Flo XT because HSR is out of stock

Here is the TPI throttle body and adapter on the engine in the car. Close to first start up!



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Old Jul 21, 2021 | 02:27 PM
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Re: Pro Flo XT because HSR is out of stock

dying for you to get that beast fired up! Basing some of my 383 decisions on your results... lol...

So don't just sit here posting, finish that thing!
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Old Jul 21, 2021 | 09:24 PM
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Re: Pro Flo XT because HSR is out of stock

Originally Posted by ULTM8Z
dying for you to get that beast fired up! Basing some of my 383 decisions on your results... lol...

So don't just sit here posting, finish that thing!
Me too! I only get a hour or so every other day to work on it. I hope to have it going Saturday by the latest.
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Old Jul 24, 2021 | 06:27 PM
  #34  
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Re: Pro Flo XT because HSR is out of stock

Originally Posted by ULTM8Z
dying for you to get that beast fired up! Basing some of my 383 decisions on your results... lol...

So don't just sit here posting, finish that thing!
It's alive.

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Old Sep 30, 2021 | 08:54 AM
  #35  
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Re: Pro Flo XT because HSR is out of stock

How does it run? Whats the powerband and HP potential of this intake?
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Old Oct 3, 2021 | 10:30 AM
  #36  
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Re: Pro Flo XT because HSR is out of stock

Originally Posted by 92Z
How does it run? Whats the powerband and HP potential of this intake?
It runs great. Still need a new converter. Powerband is 1500-6000. I would think I am making close to 400hp. With a bigger cam 450hp would probably be easy.
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Old Oct 3, 2021 | 05:03 PM
  #37  
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Re: Pro Flo XT because HSR is out of stock

Looks great! How did the clearance to the hood turn out... looks like everything fits well
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Old Oct 3, 2021 | 07:05 PM
  #38  
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Re: Pro Flo XT because HSR is out of stock

Originally Posted by alan91z28
Looks great! How did the clearance to the hood turn out... looks like everything fits well
Even with the under hood insulator I had a bit more than 1/2" of clearance.
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