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How fast have you been with a 250 blower?
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DRR Sportsman
posted
What's the furthest you've pushed your 250 blower engine?

Total Race Weight?
Engine Size?
Boost Number?
 
Posts: 607 | Location: UTD | Registered: September 25, 2019Reply With QuoteReport This Post
DRR S/Pro
Picture of The Bozman
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Gulliti has been low 20's with his and I believe a 31 pulley, he runs 30's most of the time with a 33 and a 598, don't know what his weight is. I am 2135lbs and a 582 with only 3lbs of boost running low 40's and high 30's. Spanky (Wilson Racing Engines) has been low 30's in his sons car with a 598 and a 33 pulley, don't know the weight. Another racer here in East Texas has a 2850lb Berretta, 598 and has been 4.80's with a 31 in good air making 6.5lbs, and runs 4.90's in heat of summer with a 33 making 4lbs. I am about 95% sure on the numbers for these cars but they can chime in.


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Posts: 2487 | Location: Gilmer, Texas | Registered: June 25, 2002Reply With QuoteReport This Post
DRR Sportsman
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following in thr process of getting all parts together for put 1 on
 
Posts: 141 | Location: Syracuse NY | Registered: November 23, 2005Reply With QuoteReport This Post
DRR Sportsman
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low 4.40s high 30's with 565 and 29t at 2100lb. Probably faster if the flash wasn't 7100, dunno.
 
Posts: 478 | Location: somewhere between been and never was | Registered: November 03, 2002Reply With QuoteReport This Post
DRR Sportsman
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quote:
Originally posted by The Bozman:
Gulliti has been low 20's with his and I believe a 31 pulley, he runs 30's most of the time with a 33 and a 598, don't know what his weight is. I am 2135lbs and a 582 with only 3lbs of boost running low 40's and high 30's. Spanky (Wilson Racing Engines) has been low 30's in his sons car with a 598 and a 33 pulley, don't know the weight. Another racer here in East Texas has a 2850lb Berretta, 598 and has been 4.80's with a 31 in good air making 6.5lbs, and runs 4.90's in heat of summer with a 33 making 4lbs. I am about 95% sure on the numbers for these cars but they can chime in.


Not disputing your performance, but you need a new boost gauge...
 
Posts: 105 | Location: Over here | Registered: November 28, 2007Reply With QuoteReport This Post
DRR Trophy
Picture of NC3x58
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Here in Ohio, it seems common 565-598's seem to settle in on high 4.40's to mid 4.50's, cars that were 4.70-4.80 cars prior to blower. This is all obviously pulley dependent etc. plus we're at 1100' track altitude most places, and most of these guys don't change cam or anything.. Just bolt the blower on and go.


Nick Craig

1971 Camaro Split Bumper
376ci LS3
 
Posts: 410 | Location: Ohio | Registered: December 28, 2013Reply With QuoteReport This Post
DRR Trophy
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The above mentioned beretta weighs 2740 with 598. With a 33 top and 67 bottom pulley, it has been 4.85@144 in killer fall air but is typically a 4.92-6@141 in the heat. A swap to a 31 pulley is worth approximately .06 and 1.5-2 mph. We intend to run our 29 pulley this fall and see where we can go. The best mph to date is 147.
 
Posts: 29 | Location: Gilmer, TX | Registered: October 07, 2009Reply With QuoteReport This Post



DRR Pro
Picture of TORQIN
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Around 2100 lbs with steel block, 598, brodix bb3s, 33 pulley, 1 carb, 4.26 at 163 mph at sea level in winter time. Will go faster now I suspect with faster pulley, also now has larger Get M carb on it.
 
Posts: 1564 | Location: Houston, Tx. | Registered: November 27, 2008Reply With QuoteReport This Post
DRR All Star
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quote:
Originally posted by TORQIN:
Around 2100 lbs with steel block, 598, brodix bb3s, 33 pulley, 1 carb, 4.26 at 163 mph at sea level in winter time. Will go faster now I suspect with faster pulley, also now has larger Get M carb on it.


Will that same gear go 1/4 as well?


Foxtrot Juliet Bravo
 
Posts: 5964 | Location: Illinois | Registered: July 08, 2004Reply With QuoteReport This Post
DRR Pro
Picture of TORQIN
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Definitely!
 
Posts: 1564 | Location: Houston, Tx. | Registered: November 27, 2008Reply With QuoteReport This Post
DRR S/Pro
Picture of "The Bender"
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I gotta ask, are there cars on alcohol?

I'm assuming they are.....


272" Spitzer
540 Chevy
The Blower Shop XR1
FTI XPM Series Converter
FTI Level 6 Powerglide
3.69@199
.916 60'

2017 Bradenton Heads Up Madness
Open Outlaw Champ

2018 PDRA T/D #5
2019 PDRA T/D #2

2020 Retired From T/D Competition....

2020 Bradenton NMCA Hemi Shootout Winner

2021 getting back into bracket racing........
 
Posts: 2986 | Location: Yes | Registered: July 08, 2009Reply With QuoteReport This Post
DRR Sportsman
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quote:
Originally posted by "The Bender":
I gotta ask, are there cars on alcohol?

I'm assuming they are.....


That's another thing I should have added to the original question

What Fuel Type
 
Posts: 607 | Location: UTD | Registered: September 25, 2019Reply With QuoteReport This Post
DRR Sportsman
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Yep to the alcohol. There is a brother and sister around here in 2 black dragsters I'm pretty sure I've seen them dialed 4.19 before.
 
Posts: 478 | Location: somewhere between been and never was | Registered: November 03, 2002Reply With QuoteReport This Post
DRR Sportsman
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quote:
Originally posted by I Hate Dragsters:
Yep to the alcohol. There is a brother and sister around here in 2 black dragsters I'm pretty sure I've seen them dialed 4.19 before.


Wonder if there is any issue with heat from spinning the blower too fast with Alky?

I would assume you could mitigate the heat issue with the alcohol fuel, and effectively spin the blower as fast as it can go without coming apart.
 
Posts: 607 | Location: UTD | Registered: September 25, 2019Reply With QuoteReport This Post



DRR Sportsman
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I've ran a the 29 tooth a bunch without issues, mainly q16 stuff. I bracket race and 4.50 index with a 33 tooth. It creates significantly less heat than the 29 tooth.

Based strictly on how much water temp it builds driving to the staging lanes. Scientific research method, absolutely not lol
 
Posts: 478 | Location: somewhere between been and never was | Registered: November 03, 2002Reply With QuoteReport This Post
DRR Trophy
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Low 4.40’s with the 33 pulley at 2150 lbs here. I haven’t really run it in good air yet. I’m using a 10” converter, shifting at 7200 and crossing at 6900. Just went 188mph on the stop in 3700’ DA in Topeka also. It’s looking to be a pretty killer S/C setup…
 
Posts: 58 | Location: D3 | Registered: May 24, 2018Reply With QuoteReport This Post
DRR Trophy
Picture of Thurston
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quote:
Originally posted by I Hate Dragsters:
I've ran a the 29 tooth a bunch without issues, mainly q16 stuff. I bracket race and 4.50 index with a 33 tooth. It creates significantly less heat than the 29 tooth.

Based strictly on how much water temp it builds driving to the staging lanes. Scientific research method, absolutely not lol


Are you talking water temp or intake temp?
 
Posts: 65 | Location: West Michigan | Registered: February 13, 2009Reply With QuoteReport This Post
DRR S/Pro
Picture of The Bozman
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quote:
Originally posted by sc3171:
Low 4.40’s with the 33 pulley at 2150 lbs here. I haven’t really run it in good air yet. I’m using a 10” converter, shifting at 7200 and crossing at 6900. Just went 188mph on the stop in 3700’ DA in Topeka also. It’s looking to be a pretty killer S/C setup…


what is the motor combination? that thing will really wake up if you put that shift up to 75-7600


Keeping the Socialists and NEO-LIBERALS at bay with FACTS one post at a time !!!

Freedom isn't free !!! Thank a veteran, they will actually appreciate it.
 
Posts: 2487 | Location: Gilmer, Texas | Registered: June 25, 2002Reply With QuoteReport This Post
DRR Sportsman
posted Hide Post
quote:
Originally posted by Thurston:
quote:
Originally posted by I Hate Dragsters:
I've ran a the 29 tooth a bunch without issues, mainly q16 stuff. I bracket race and 4.50 index with a 33 tooth. It creates significantly less heat than the 29 tooth.

Based strictly on how much water temp it builds driving to the staging lanes. Scientific research method, absolutely not lol


Are you talking water temp or intake temp?


water temp. ambient conditions and how slow the clown in front of me drives to the lanes skew any usable info. Just an observation.
 
Posts: 478 | Location: somewhere between been and never was | Registered: November 03, 2002Reply With QuoteReport This Post
DRR Trophy
posted Hide Post
quote:
Originally posted by The Bozman:
quote:
Originally posted by sc3171:
Low 4.40’s with the 33 pulley at 2150 lbs here. I haven’t really run it in good air yet. I’m using a 10” converter, shifting at 7200 and crossing at 6900. Just went 188mph on the stop in 3700’ DA in Topeka also. It’s looking to be a pretty killer S/C setup…


what is the motor combination? that thing will really wake up if you put that shift up to 75-7600


This is the Oakley 632 Sniper deal. Only running 26 degrees timing as well.
 
Posts: 58 | Location: D3 | Registered: May 24, 2018Reply With QuoteReport This Post
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