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Author Topic: Dyno test! 2017 M8 120 budget build!  (Read 6720 times)

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Fullsac Performance

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Re: Dyno test! 2017 M8 120 budget build!
« Reply #15 on: November 02, 2017, 08:20:26 PM »

he said do your own research  :nixweiss:

I'm working on it right now!
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davidw221

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Re: Dyno test! 2017 M8 120 budget build!
« Reply #16 on: November 03, 2017, 09:44:21 AM »

I caution a couple of things when sizing out a new throttle body, one, is if you using stock heads, or if your heads have had work done to them, the exhaust port needs to fit the throttle body, I had level B heads and had a 1.7 on the exhaust, 5.3 injectors, and a 55-58 throttle body, I believe it is 1.6 on the stock heads for the exhaust port.
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hawgzilla

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Re: Dyno test! 2017 M8 120 budget build!
« Reply #17 on: November 03, 2017, 09:56:04 AM »

 If the exhaust port is aligning with the throttle body, you need to swap the heads--they're on backwards! ;D
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rayson56

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Re: Dyno test! 2017 M8 120 budget build!
« Reply #18 on: November 03, 2017, 01:01:02 PM »

Steve, I see your work bench is outfitted appropriately!!
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fastfreddy

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Re: Dyno test! 2017 M8 120 budget build!
« Reply #19 on: November 03, 2017, 05:48:59 PM »

I caution a couple of things when sizing out a new throttle body, one, is if you using stock heads, or if your heads have had work done to them, the exhaust port needs to fit the throttle body, I had level B heads and had a 1.7 on the exhaust, 5.3 injectors, and a 55-58 throttle body, I believe it is 1.6 on the stock heads for the exhaust port.
ok, im trying to follow along here... your saying 50 is ok for a 1.6 and a 1.7 needs a 55 or a 58? to me i would say the 58 would be better suited on a 1.8 but only with level C head  ??? corect me if im wrong
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davidw221

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Re: Dyno test! 2017 M8 120 budget build!
« Reply #20 on: November 03, 2017, 08:58:02 PM »

ok, im trying to follow along here... your saying 50 is ok for a 1.6 and a 1.7 needs a 55 or a 58? to me i would say the 58 would be better suited on a 1.8 but only with level C head  ??? corect me if im wrong
Let me try to explain, the exhaust ports stock are 1.6, level B can be bored to 1.7 so when you purchase the TB in order for it to fit you need to have the right size, also something I didn't mention is when purchasing a TB from HPI, send the electronics to them so they can install it for you, 3 of my friends went with the 58MM. TB, and their satisfied with the performance, they are glad they didn't get into the motor too!
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Unbalanced

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Dyno test! 2017 M8 120 budget build!
« Reply #21 on: November 06, 2017, 09:47:51 AM »

I can understand a throttle body matching intake flow, and port and the exhaust flow being correct through a valve job etc, what does a 1.7 exhaust port opening have to do with a throttle body fitting.   

The throttle body attaches to the intake not the exhaust please explain.
« Last Edit: November 06, 2017, 09:51:33 AM by Unbalanced »
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davidw221

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Re: Dyno test! 2017 M8 120 budget build!
« Reply #22 on: November 11, 2017, 02:52:49 PM »

stock is 1.6 headwork you can expand the diameter of the port.
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fastfreddy

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Re: Dyno test! 2017 M8 120 budget build!
« Reply #23 on: December 12, 2017, 07:23:23 PM »

STEVE, im just revisiting the thread to see how the research is going
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Fullsac Performance

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Re: Dyno test! 2017 M8 120 budget build!
« Reply #24 on: December 13, 2017, 10:10:27 AM »

STEVE, im just revisiting the thread to see how the research is going

I'm kinda stuck. Melted the throttle body after I put on the exhaust port?

SG
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BigLew

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Re: Dyno test! 2017 M8 120 budget build!
« Reply #25 on: December 13, 2017, 11:18:23 AM »

Steve you a funny guy!

BigLew
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