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  #1  
Old Feb 3rd, 12, 12:32 PM
ATK HP Engines ATK HP Engines is offline
 
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Thumbs up ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test

The Day has come!

Ever since the newly introduced set of Dart Aluminum SHP 200cc heads there has been a bit of talk with no real testing (to my knowledge). Eric had posted up a thread with pictures of a set he worked with and I had mentioned we had a set on the way for a customers build. After this Eric contacted me and we decided that we would build our customers engine (specs below) heads untouched and we would than test/ship the heads off to Eric for a little clean up so he and everyone else can see what they are capable of with a little work. I will let Eric speak for what he is going to do to them after he speaks to Mark Johnson whom runs the shop here at ATK.

Let me say, this is NOT a MAX EFFORT deal. This is a street warrior engine that may see the track from time to time for our customer and anything over 500HP is icing on the cake. Below are some pictures of the build and STOCK heads out of the box, as you can see, you can quickly pickup some power with minimal work.

http://high-performance-engines.com/index.shtml

http://wengines.com/index.html

Engine Specs:
#880 Block 4bolt Block 1pc Seal
Scat 4340 3.750" Forged Crank
Scat 4340 5.7" H Beam Rods
10.1 Mahle Forged Pistons
Dart SHP 200cc/72cc Aluminum Heads (out of the box)
Hyd Roller Cam 247/253 @ 50 .602/618 112LSA
Crane 1.6 Roller Rockers
Edelbrock Air Gap Intake
MSD Pro Billet Dist
MSD 8mm Wires
Quick Fuel Q-750 Carb Jetted @ 72/82
Best ran at 36 degrees of timing

ENGINE PRODUCED 515HP @ 6000 RPM / 503TQ @ 4700RPM We ran up to 6200RPM on other pulls, but this was our final adjustment dyno. From 6000-6200 was pretty consistant and slowy started to dropped off at 6200RPM. I have a PDF File of the dyno to post, if anyone knows how???

DYNO VIDEO:













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  #2  
Old Feb 3rd, 12, 12:39 PM
67RS502 67RS502 is offline
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Default Re: ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test

thats a lot of duration for only 10:1 and a dual plane
I'd like to see what it would do with the heads ported and a Super victor
with plenum work, and milled heads to bump the comp a bit.... another 50-75hp!
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  #3  
Old Feb 3rd, 12, 12:46 PM
ATK HP Engines ATK HP Engines is offline
 
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Default Re: ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test

Definatley, but like I said...its a street car. You can always do more, but its application for us. ERIC will be recieving the heads in 2-3 days to do a once over on them. We will be posting the after results once we get them back and dyno it.
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  #4  
Old Feb 3rd, 12, 5:37 PM
Notalent Notalent is offline
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Default Re: ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test

WE GOT A BONUS! To do a accurate comparison, we will be running this whole setup with Pro-Filers as well out of the box 195cc. This will be a nice back to back comparison for all to see. Should have this done Mon or Tues of next week.
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  #5  
Old Feb 3rd, 12, 7:05 PM
Eric Weingartner Eric Weingartner is offline
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Default Re: ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test

I am excitied to get a chance to do this. I would really like to thank the guys from ATK for giving me a chance to play with the heads and see what a little grinding will do to these heads.

I plan to do a basic port job. I will not be doing anything crazy. This is a street motor. I plan to do each section then flow it so you guys can see how much grinding one section can gain. The plan goes is to grind the chamber, throat, bowl, shortside, guide thinning, gasket match, and pushrod pinch. Not in that order. This probably sounds extensive but I don't plan on opening it up a ton. I am going to try to time how long it takes to grind these. I am not the fastest porter but it should give guys out there an idea of how much work goes into a head. I will try to share as much information about what I am doing as possible. I am going to be a open book.

I am just going to have fun grinding these heads I have no expectations but I am hoping for some good numbers.
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  #6  
Old Feb 3rd, 12, 7:14 PM
Bunz-T Bunz-T is offline
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Default Re: ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test

I love it when a plan comes together.
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  #7  
Old Feb 3rd, 12, 10:48 PM
blue66 blue66 is offline
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Default Re: ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test

Quote:
Originally Posted by 67RS502 View Post
thats a lot of duration for only 10:1 and a dual plane
I'd like to see what it would do with the heads ported and a Super victor
with plenum work, and milled heads to bump the comp a bit.... another 50-75hp!
I'm with you here,,,,,bout 20* less duration, or make the combo suit the rpm the cam could support
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  #8  
Old Feb 3rd, 12, 11:05 PM
Chad Speier Chad Speier is offline
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Default Re: ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test

Can I play?

Interested in adding my CNC import head to the dyno test?

If you would rather keep it as-cast or minor porting, I understand.
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  #9  
Old Feb 4th, 12, 12:04 AM
1989GTA 1989GTA is offline
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Default Re: ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test

Looking forward to the results.
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  #10  
Old Feb 4th, 12, 8:42 AM
MrBill66Malibu MrBill66Malibu is offline
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Default Re: ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test

I'm subscribed. I have a similar engine with old Brodix Street heads, looks like I have found my replacement heads
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  #11  
Old Feb 4th, 12, 9:32 AM
Highway Star Highway Star is offline
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Default Re: ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test

This is going to be cool.
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  #12  
Old Feb 5th, 12, 7:18 AM
Mikeys69 Mikeys69 is offline
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Default Re: ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test

Quote:
Originally Posted by Eric Weingartner View Post
I am excitied to get a chance to do this. I would really like to thank the guys from ATK for giving me a chance to play with the heads and see what a little grinding will do to these heads.

I plan to do a basic port job. I will not be doing anything crazy. This is a street motor. I plan to do each section then flow it so you guys can see how much grinding one section can gain. The plan goes is to grind the chamber, throat, bowl, shortside, guide thinning, gasket match, and pushrod pinch. Not in that order. This probably sounds extensive but I don't plan on opening it up a ton. I am going to try to time how long it takes to grind these. I am not the fastest porter but it should give guys out there an idea of how much work goes into a head. I will try to share as much information about what I am doing as possible. I am going to be a open book.

I am just going to have fun grinding these heads I have no expectations but I am hoping for some good numbers.
Any idea what this work is worth in real dollars. Seeing these SHP heads are Econo heads costing just under 1 grand. The out of the box AFR heads are selling for just under 1500. Price in most cases will dictate which head is a better bargain. Because if money wasn't a issue we wouldn't be talking SHP.
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  #13  
Old Feb 5th, 12, 5:37 PM
Mikeys69 Mikeys69 is offline
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Default Re: ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test

ATK HP ENGINES / Eric Weingartner, why don't you reply to my above post?
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  #14  
Old Feb 6th, 12, 11:50 AM
Notalent Notalent is offline
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Default Re: ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test

Quote:
Originally Posted by Mikeys69 View Post
ATK HP ENGINES / Eric Weingartner, why don't you reply to my above post?
Because its the weekend

Eric will have to post up what his time is worth/retails for. We would normally charge $200-$300 for something like this, but were not a small shop.

The biggest thing though...were not comparing these to a $1600 head and we are not trying to modify these to compete with a $1600 set of heads. This was moreso to see what type of power they are capable with out of the box. Eric doing his work was just a bonus for our customer and gave Eric a chance to work with a set. The good part is, that a customer may not have that extra $600-700 in his pocket for AFR heads....he can buy these and have someone work them over a year down the line when he can afford to do so, while making great power now with an American Made head. $ is just about always an issue...im glad to see these heads work well....it will nice to see how the Pro-Filers compare back to back as well since they are at the same price point.
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71 Chevelle
ATK Engines 496 Stroker
TH400 / 9 Inch 3500 Stall
http://brandons71chevelle.weebly.com/


ATK HIGH PERFORMANCE ENGINES
WWW.HIGH-PERFORMANCE-ENGINES.COM

Need an engine...shoot me a PM.

ATK SBC Performance Cylinder Heads are on the way! Look to ship the end of Nov.
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  #15  
Old Feb 6th, 12, 5:56 PM
artmalibu artmalibu is offline
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Thumbs up Re: ATK HP ENGINES / Eric Weingartner Dart SHP 200CC Test

What size converter and gears would an engine like this need to work well in a Chevelle?

Thanks for sharing this with us!!

Last edited by artmalibu; Feb 6th, 12 at 7:57 PM.
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