EnglishRacing Drag X 1199whp 8385 Gen 2 59psi

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Feb 10, 2017 | 10:04 AM

#31

JohnBradley

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The EGT is really high on a stock port 4B11, the intake isnt the issue as it will flow more than a 4G63. The 29mm exhaust valve and port that is 2/3s the size elevates EGT by 250* on average. It flows by virtue of force but bottlenecks create problems. The main thing we get when we port them is reduced backpressure and EGT. There is definitely power in porting the exhaust as well though, we have found 60whp overall.

Feb 10, 2017 | 11:16 AM

#32

LetsGetThisDone

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Quote:

Originally Posted by razorlab

Can you elaborate? This car is making 1200whp with a stock port head...

I keep seeing you say this but there are a plethora of 700whp+ 4b11's with non-ported heads.

I meant turbo for turbo. To extract the full potential from a turbo, the 4b11 works better with a ported head. See below in regard to lower backpressure and EGT, by a lot.

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Originally Posted by JohnBradley

Feb 10, 2017 | 11:30 AM

#33

JohnBradley

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The other thing to keep in mind is it made 4whp more than a full port 4g63 with a turbo that is 11mm bigger. This car should have made over 1300 with a ported head and the 8385. 7285 to 7285, Drag X vs Drag 8 the stock head is down around 100whp, different motors to be sure but it shows where the stock head is really at in comparison.

Feb 10, 2017 | 02:36 PM

#34

RazorLab

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Quote:

Originally Posted by JohnBradley

Good info, thanks for sharing!

Feb 14, 2017 | 01:38 PM

#35

NotThisFool

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From: Bakersfield

Oh dang 64 psi at 10,300 rpm.
Really impressive!
all custom work and all. Congrats on a great build.

Feb 21, 2017 | 03:38 AM

#36

HaterMagnet

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From: MN

so whens the full boost pass coming?

Feb 21, 2017 | 05:23 PM

#37

JohnBradley

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Quote:

Originally Posted by HaterMagnet

so whens the full boost pass coming?

When we have the M150 in it and 8 injectors on methanol. It will get to real boost and timing then.

M150 has a base calibration at this point based on my X, most of the CAN sniffing has been done, etc. We have to build a new harness and then wire the extra 4 injectors. It is coming soon though

Mar 9, 2017 | 12:10 PM

#38

linuxjm

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Any video of the dyno pull or car in action???
Should be looking at 7 second pass at track

Mar 10, 2017 | 10:31 AM

#39

JohnBradley

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1/2 mile and some drag racing.

Dyno video and walk around at PRI

http://www.revvedmag.com/videos/on-t...x-at-pri-2016/

Some faster passes at the track, drag racing.

http://www.dailymotion.com/video/x4cvsz0

I will look for more.

Last edited by JohnBradley; Mar 10, 2017 at 10:37 AM.

Mar 11, 2017 | 10:42 PM

#40

2winscroll

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From: wisconsin

Nice work! You guys R top notch! What a/r do run on a turbo that large? Just curious 500hp @ 6500 seems like it's not as much lag as you would expect from a turbo that large.

Last edited by 2winscroll; Mar 12, 2017 at 07:40 AM.