gt42 on 456 August 26, 2019 04:43AM
I have a 8000 with a456 ford with 3x3 gt42, 12mm simms,3200 rpm cam,101 housing, rules no water, how much fuel and how much timing, will I be able to keep lite ,thanks for any input


ep
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Re: gt42 on 456 August 26, 2019 10:02AM
I would recommend between 350 to 450cc of fuel and somewhere between 26 to 30 btdc injection timing. The 3x3 is gonna be hard to stay on top of without water. Keep an eye on your egts. Or you'll be melting down the turbine wheel in the turbo. Not sure what class you are running? Maybe a smaller turbo may serve you better?
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Re: gt42 on 456 August 26, 2019 10:27AM
Can you get smaller exhaust housings for that turbo or is that the smallest they make?
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Re: gt42 on 456 August 26, 2019 03:14PM
To my knowledge, the 1.01 is the tightest housing they have for the gt42
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Re: gt42 on 456 August 27, 2019 12:27AM
FVP makes tighter housings than the 1.01 for the GT42&45. They machine borg warner housings to get down to a .90A/r. 3x3 will be very hard to run at 3000rpm with out water. Also going to take a decent amount of fuel to run on the big end. And timing and all of these variables are going to depend on intake, cam and compression etc.
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Re: gt42 on 456 August 27, 2019 09:55AM
I had same engine & fuel with an S300, 550cc ran very well. I'd guess 650 plus? Good luck!
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Re: gt42 on 456 August 28, 2019 05:57AM
I was thinking 35 degrees and 600,700, cc fuel . what rpm is needed to keep turbo lite? will the 90 housing help with small cubes or 3200 rpm, thanks
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Re: gt42 on 456 August 29, 2019 12:13PM
I have a 90 housing for gt42 that’s Hart’s machined to for if your interested
Works really good at 3000 rpm and had it on a ford
585 690 8196
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Re: gt42 on 456 August 30, 2019 04:16AM
35 degrees will be to much timing for 3000rpm. It will likely run better at 28-30. Your best option may be a 2.8 gt42 or 45 or a s300 based unit. Which also depends on your cam, manifolds, head etc. With no water injection its going to be tough of the engine and the turbine wheel. You will likely see 1800 degrees egt and flame.
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Re: gt42 on 456 August 28, 2019 11:16PM
Matt, where do you pull at, do you have any head work done, how big of a turbo will a stock head support, mine seems to (surge, stall, backup ) 50/60 lbs boost, smooth bore. Thanks
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Re: gt42 on 456 August 31, 2019 10:21AM
Eastern PA, but haven't ran it in 6 years. Just cleaned up intake ports, nothing professionally flowed. Please detail your "surge, stall, backup". Thanks.
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Re: gt42 on 456 August 31, 2019 09:18PM
keep the amount of tubing between the turbo and intake to a minimum ? had turbo surge once when I got silly with the intake header idea?i had......
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Re: gt42 on 456 August 30, 2019 01:58AM
I had the same exact setup. Very hard to keep lit. Melted a few turbos before I put water injection in. After a while I switched to an S400 and couldn’t keep that lit either. Better off going smaller
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