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 Post Posted: Fri Dec 28, 2012 8:15 pm 
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What do they mean by adapter horn in the drag radial rules as far as turbo, is that the same as a reducer and are reducers allowed?


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 Post Posted: Fri Dec 28, 2012 10:36 pm 
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Corey Anderson wrote:
What do they mean by adapter horn in the drag radial rules as far as turbo, is that the same as a reducer and are reducers allowed?


Adapter/Reducer same 88mm inlet that Al has a go/no-go gauge and I think it needs to come within a 1/16 of the wheel.

What is your combo?

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 Post Posted: Fri Dec 28, 2012 11:13 pm 
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Mustang 363 sbf w/brodix inline head w/91mm reduced to 88mm and glide


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 Post Posted: Sat Dec 29, 2012 12:34 am 
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is the Precision x275-88 legal for drag radial?

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 Post Posted: Sat Dec 29, 2012 7:10 am 
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Quote:
-Maximum Turbo Size: 88mm (adapter horns are acceptable) Must pass go/no go gauge. -Maximum Procharger Size: F-1R or comparable. F2 legal with 3.875 inlet reducer,
mounted no further away than the original inlet flange. F2R & F1X is not legal!


88mm inlet go/no-go. So if if has a 88mm inlet it's legal the way I read it and built ours.

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 Post Posted: Sat Dec 29, 2012 7:23 am 
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68droptop wrote:
is the Precision x275-88 legal for drag radial?


Do you still have the same car with the sb2 in it? It would be nice to see it back down to ORP.

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 Post Posted: Sat Dec 29, 2012 3:46 pm 
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julven wrote:
68droptop wrote:
is the Precision x275-88 legal for drag radial?


Do you still have the same car with the sb2 in it? It would be nice to see it back down to ORP.


Yes, same car and combo we've run around the midwest for the last few years. We're in STL now, so will make the races at Gateway and a couple down at ORP. The turbo is legal in x275 and is a true (large frame) 88, so it should be legal. However, as we found out at a few races (OTT5 was one), the housing is slightly larger than the 88 mm wheel (common sense right?). And a go/no go exactly 88mm is going to fit right through without touching. Just need Marty/Mitch to chime in and give their blessing and we'll be back down for at least the shootout and hopefully a couple more races.

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 Post Posted: Sun Dec 30, 2012 12:42 am 
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I made the gage its right at 89mm

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 Post Posted: Sun Dec 30, 2012 4:59 pm 
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turbo69camaro wrote:
I made the gage its right at 89mm


Should be ok then. Here are the specs pulled off Precision's website:


Class Legal Turbocharger - X275 88 for most X275 classes

Part Number Part Number: PTB705-5500

Manufacturer Manufacturer: Precision Turbo and Engine

MSRP MSRP: $3,695.00

PTB705-5505 / X275 88
HP Rating: 1,600
This Class Legal turbocharger features the following:
• Exclusive CEA® (Competition Engineered Aerodynamics) compressor wheel machined from a 2618-aluminum forging
• Higher efficiency and faster transient response for maximum power and performance
• 88mm inducer compressor wheel
• Large frame compressor cover with ported shroud inlet
• F or G trim turbine wheel
• Turbine housing options:
- F trim available with 1.0 A/R
- G trim available with 1.0, 1.32, or 1.50 A/R
(All housings feature a 5" V-band discharge)
• Hydrodynamic 360° thrust bearing system

Approved for use in most X275 series found throughout the country. Please verify rules to check legality of the turbocharger prior to purchasing.

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 Post Posted: Sun Dec 30, 2012 6:56 pm 
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Man I would just measure it, that way u don't run into the same problem u ran into last time


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