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Old 09-29-2019, 08:40 PM   #1
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Default Fastest with twin 66's

How fast have you guys been with twin 66's?
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Old 09-29-2019, 10:47 PM   #2
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Default Re: Fastest with twin 66's

8.31 at 168 weighing 3400 lbs.
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Old 09-30-2019, 02:50 AM   #3
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Default Re: Fastest with twin 66's

People have been 7s with cast twin 66 borgs. Chris Bishir is one that comes to mind. Non intercooled pump E85
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Old 09-30-2019, 11:42 AM   #4
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Subscribing... twin 66’s in process on my sbf
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Old 09-30-2019, 02:43 PM   #5
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Default Re: Fastest with twin 66's

I have a customer that went in the 7's with our 62's......SBF.
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Old 09-30-2019, 05:36 PM   #6
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Default Re: Fastest with twin 66's

We've been [email protected] on a 275 and [email protected] on a big tyre with twin 6266 precisions.
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Old 10-01-2019, 04:35 PM   #7
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Default Re: Fastest with twin 66's

On what motor 6Boost, inline 6?
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Old 10-01-2019, 05:45 PM   #8
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Default Re: Fastest with twin 66's

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On what motor 6Boost, inline 6?
364" LS3
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Old 10-01-2019, 07:32 PM   #9
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Default Re: Fastest with twin 66's

6266s went that far Im impressed. Have some 6766s i thought would be out of steam at 175mph or so at 3400#

Gas, ethanol or methanol?
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Old 10-02-2019, 01:03 AM   #10
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Default Re: Fastest with twin 66's

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6266s went that far Im impressed. Have some 6766s i thought would be out of steam at 175mph or so at 3400#

Gas, ethanol or methanol?
The car has been 186mph, it can make another 5psi more boost than that but you are fighting valve train stability with a hyd cam vs boost pressure. Intake temps also over 200*.

This was on methanol, it has run within 4/100's intercooled and non intercooled. The big tyre run was in a different chassis obviously, that run was non intercooled methanol. Stock LQ9 block and stock LS3 head castings cnc ported. Its no race engine, it gets driven on pump gas or E85 on the street and has completed 3 drag challenges (similar to drag week) here in Australia and done 20-30k miles in the last 4-5 years.

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Old 10-02-2019, 01:48 AM   #11
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Default Re: Fastest with twin 66's

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Originally Posted by 6BOOST View Post
The car has been 186mph, it can make another 5psi more boost than that but you are fighting valve train stability with a hyd cam vs boost pressure. Intake temps also over 200*.

This was on methanol, it has run within 4/100's intercooled and non intercooled. The big tyre run was in a different chassis obviously, that run was non intercooled methanol. Stock LQ9 block and stock LS3 head castings cnc ported. Its no race engine, it gets driven on pump gas or E85 on the street and has completed 3 drag challenges (similar to drag week) here in Australia and done 20-30k miles in the last 4-5 years.

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What timing did it like intercooled and what did you run without?
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Old 10-02-2019, 12:58 PM   #12
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Default Re: Fastest with twin 66's

Quote:
Originally Posted by 6BOOST View Post
The car has been 186mph, it can make another 5psi more boost than that but you are fighting valve train stability with a hyd cam vs boost pressure. Intake temps also over 200*.

This was on methanol, it has run within 4/100's intercooled and non intercooled. The big tyre run was in a different chassis obviously, that run was non intercooled methanol. Stock LQ9 block and stock LS3 head castings cnc ported. Its no race engine, it gets driven on pump gas or E85 on the street and has completed 3 drag challenges (similar to drag week) here in Australia and done 20-30k miles in the last 4-5 years.

6BOOST

That's awesome!
Nice job with that setup.
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Old 10-02-2019, 01:16 PM   #13
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Impressive!! Maybe I missed how much total boost?
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Old 10-02-2019, 01:17 PM   #14
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And compression?
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Old 10-02-2019, 11:01 PM   #15
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Default Re: Fastest with twin 66's

Quote:
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Impressive!! Maybe I missed how much total boost?
Its not my engine to disclose timing and compression, both of which are relative to the combo/camshaft/other factors anyway. It can make over 40lb's of boost and ran that on 35lb or so.

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