A little science project [[[ updated]]]]
#2421848
12/21/17 02:06 PM
12/21/17 02:06 PM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
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OP
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bean town ....Ca
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Working on both side of the motor
Last edited by WHITEDART; 12/29/17 07:22 PM.
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: A little science project
[Re: WHITEDART]
#2421878
12/21/17 03:44 PM
12/21/17 03:44 PM
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Joined: Apr 2005
Posts: 1,505 TN
SCATPACK 1
pro stock
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pro stock
Joined: Apr 2005
Posts: 1,505
TN
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I guess you could say in and out Judging by the shoe comparison, I would guess 10 inch wide collectors. LOL Thanks for sharing and yes, I know they are on a table. But is the O2 sensor bung in the correct spot? I thought they were supposed to be half way back in the collector? Just asking to learn a little more. MERRY CHRISTMAS.
Old Geezer Racing
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Re: A little science project
[Re: SCATPACK 1]
#2421897
12/21/17 04:43 PM
12/21/17 04:43 PM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
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Well I run a 9.6 deck block.. and the 420 intake is for a low deck so I've had to use spacers to make it work.. I cut it in half and shipped it to Brett Miller.. he's going to stretch it I think close to 5/8 of an inch.. it will make the plenum larger in the runner shorter... the idea behind the collector is it has a 3-inch pinch. Versus the 2.5 that I'm running right now.. trying to find a happy medium between acceleration and mph
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: A little science project
[Re: WHITEDART]
#2421899
12/21/17 04:48 PM
12/21/17 04:48 PM
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Joined: Aug 2003
Posts: 43,237 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,237
Bend,OR USA
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I've heard that the merge type collectors are good and others say no good I have seen ET and MPH gains at the track by changing collector length and primary pipe lengths, what are your thoughts and findings?
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: A little science project
[Re: Cab_Burge]
#2421906
12/21/17 04:59 PM
12/21/17 04:59 PM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
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Well going from a 2.5 pinch to a 4'open collector I seen a 12 horsepower increase on the dyno.. which was a significant find more than any other single change that we made including from small carburetor to Big carburetor.. but the smaller collector accelerates the car so much faster it actually provides a better time slip. Now keep in mind this is on a fairly heavy two speed small block.. mph is definitely down with the smaller collector
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: A little science project
[Re: WHITEDART]
#2421917
12/21/17 05:14 PM
12/21/17 05:14 PM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
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I think what most people miss with collectors is the actual effect that it has on the carburetor.. you could easily need a four or five jet increase or decrease with different collectors.. and what provides more power on the dino isn't always the fastest way down the track
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: A little science project
[Re: Cab_Burge]
#2421924
12/21/17 05:20 PM
12/21/17 05:20 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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It likes the smaller tubes on the primaries to give you more torque in the lower RPMs due to the trans... I cut one of those intakes in half to fit a engine.. it was for testing
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Re: A little science project
[Re: WHITEDART]
#2421935
12/21/17 05:37 PM
12/21/17 05:37 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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Well going from a 2.5 pinch to a 4'open collector I seen a 12 horsepower increase on the dyno.. which was a significant find more than any other single change that we made including from small carburetor to Big carburetor.. but the smaller collector accelerates the car so much faster it actually provides a better time slip. Now keep in mind this is on a fairly heavy two speed small block.. mph is definitely down with the smaller collector A three speed would probably help the big collector accelerate as fast or faster than the pinch collector but...as you know it's hard to control all that low gear, especially if you are running leaf springs (which, IIRC you are) so at some point you have to do what you are doing. As I've always said, if it makes more power in the dyno it SHOULD go faster in the car. Gearing, converter, suspension and shocks can all make an engine with more power go slower.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: A little science project
[Re: madscientist]
#2423349
12/24/17 11:49 PM
12/24/17 11:49 PM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
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Intake stretch 2.0.. it made the trip safe and sound and is now in the fixture..
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: A little science project
[Re: WHITEDART]
#2423356
12/25/17 12:02 AM
12/25/17 12:02 AM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
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OP
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the way it used to look with the adapter... this stretch will let the motor see the booster better..
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: A little science project
[Re: WHITEDART]
#2425487
12/29/17 07:27 PM
12/29/17 07:27 PM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
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OP
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Posts: 3,036
bean town ....Ca
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Now Brett will work his magic.. with this process we enlarge the plenum and shorten the runner..
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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