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Forced Induction Turbo, Supercharger, Methanol, Nitrous


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Old 03-21-2015, 04:07 PM   #1
Jmonty
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Crawford Billet Power Blocks with Supercharger

I wanted to check and see if anyone was running the Crawford Billet Power Blocks with a Supercharger set up and seeing gains? I am looking at the Jackson Racing kit and doubt they will work with a supercharger?
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Old 03-21-2015, 04:11 PM   #2
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Pretty sure they were found to have a negative effect on forced induction kits
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Old 03-21-2015, 07:46 PM   #3
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I'd be interested to see proof of pro or con.
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Old 03-27-2015, 10:20 PM   #4
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Was wondering same thing but with turbo


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Old 03-31-2015, 04:56 PM   #5
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I wanna know the result too. Since, now as I'm NA, I have BPB crawford intake manifold spacers which really helps the performance and response. I just got my Vortech Supercharge kit yesterday. The main thing is that I don't wanna be the skinny pig to test it myself.
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Old 03-31-2015, 05:34 PM   #6
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I wanna know the result too. Since, now as I'm NA, I have BPB crawford intake manifold spacers which really helps the performance and response. I just got my Vortech Supercharge kit yesterday. The main thing is that I don't wanna be the skinny pig to test it myself.
Taken from a VW page on variable length runners:
In naturally aspirated engines, the length of the intake manifold is subject to variable demands at different engine speeds. This ensures the highest possible continual air inflow rate into the combustion chamber. At low revs you need a high level of torque delivered as fast as possible - by means of a long intake manifold - while maximum power output at high revs demands short intake manifolds. The variable intake manifold features a flap system governed by the engine control unit that meets both those demands. It channels the air via the long intake manifold at low revs and through the short section at high revs. Turbo engines do not need a variable intake manifold because the boost pressure of the turbocharger determines the volume of air entering the combustion chamber. Intake manifolds in turbo engines are therefore very short for reasons of space and cost.

Explains why/how the spacers work in the 1st place, and that being boosted it will make no difference.
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Old 03-31-2015, 05:43 PM   #7
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Kodename47 has it right on the money, except for the fact that we actually found the billet power blocks to cause a fair to large amount of heat soak. We tested an NA car with them and the car physically lost power every single pull with the blocks on. We took the blocks off, adjusted and then did repeated pulls again, in which the car was consistent in power every time. We believe this to be due to their choice in material. The factory definitely chose plastic for the intake manifold material for a good reason, and that's not limited to cost.

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Old 11-05-2015, 10:23 AM   #8
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Originally Posted by Jmonty View Post
I wanted to check and see if anyone was running the Crawford Billet Power Blocks with a Supercharger set up and seeing gains? I am looking at the Jackson Racing kit and doubt they will work with a supercharger?
I ran the power blocks with JRSC for a short time (until one of the Crawford-supplied rubber seals failed/fell apart) so had a chance to have @Drift-Office put it on the dyno with and without the power blocks.

There was no difference in the dyno results
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Old 11-05-2015, 01:28 PM   #9
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Originally Posted by Sleepless View Post
I ran the power blocks with JRSC for a short time (until one of the Crawford-supplied rubber seals failed/fell apart) so had a chance to have @Drift-Office put it on the dyno with and without the power blocks.

There was no difference in the dyno results. The results look like this:
I had better results without on the DYNO
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Old 11-06-2015, 11:59 AM   #10
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Originally Posted by Sleepless View Post
I ran the power blocks with JRSC for a short time (until one of the Crawford-supplied rubber seals failed/fell apart) so had a chance to have @Drift-Office put it on the dyno with and without the power blocks.

There was no difference in the dyno results. The results look like this:
Well there is a difference between 5000 - 6500 RPM, you can see in the the dyno charts. It is small but there is a difference. What caused the difference? Also why is the blue line smooth and the red line is not above 6500 RPM even at a smoothing of 5?

We personally have seen a vast difference on the dyno on both 91 octane Flash & Go tune, especially on E85, but every custom tune/tuner is different.





With our tune you can run the tune with our without option installed but removing them you feel the difference on the top end. We have had a few customers uninstall them and feel a big jump in power on E85.

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Old 04-13-2016, 05:05 PM   #11
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@DeliciousTuning thank you for not making me waste over 500$ on those (am Canadian hence the 500), glad I thought a bit about it before buying and decided to see if the difference applied to Sc'd
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