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Re: 1" spacers
[Re: rebel]
#554225
12/15/09 10:10 AM
12/15/09 10:10 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
i have the oppotunatey to get a couple of passes on a comp prepped track this saturday afternoon for free. i'll be lucky to get 3-4 passes so was thinking about trying a carb spacer for an e.t gain. what spacer would be the best to try, a 4 hole or an open? the motor is a -1 headed ported on a 512 low deck running low 700hp with a 1025cfm 4150 series carb. idealy i'd like a dominator but budget restraints prevent that so i'm thinking a spacer. the verter is 5500 stall rears are 32" with 4.88 gears with max rpm about 7200.
Would depend oin what intake you have... the open
spacer gives you more plenum volume, the 4 hole
keeps the air velocity up.... its a trial and error
thing.... but most stroker engines need the plenum
volume
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Re: 1" spacers
[Re: MR_P_BODY]
#554226
12/15/09 10:37 AM
12/15/09 10:37 AM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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Try them both and let us know. Generally, 4 hole will improve the carb signal and the bottom end and the open is better for top end. Agree on the plenum volume for you set up, especially with your rpm operating range..
Fastest 300
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Re: 1" spacers
[Re: SG duster]
#554228
12/16/09 01:37 PM
12/16/09 01:37 PM
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Joined: Dec 2006
Posts: 4,647
aotearoa
rebel
OP
master
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OP
master
Joined: Dec 2006
Posts: 4,647
aotearoa
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Quote:
I use both under my Qjet, a 1" four hole ontop of a 1" open injector plate if I run the carb strait on the manifold it feels like its lost 50hp or more, the difference is amasing, on the 440 I use a 1" four hole taperd spacer & a 1/2" injector plate to add a little more plenum the engine even sounds different but then you dont run mufflers so you may not notice a difference in sound
50 hp from a 1" spacer  i think i'll try & fit 4, that should be 200hp right? cheaper than nos & there's no maintenance issues. 
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Re: 1" spacers
[Re: rebel]
#554229
12/16/09 03:06 PM
12/16/09 03:06 PM
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Joined: May 2009
Posts: 461
Hinterland SE Qld Aust
SG duster
mopar
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mopar
Joined: May 2009
Posts: 461
Hinterland SE Qld Aust
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without the spacer"s" the ute feels as if it falls over its nose at about 1000ft. with the spacer"s" it carrys the nose right through. its quite noticeable, since its only a street 12sec car with full exhast & only 308ci with hyd cam & standard rockers any small gain is easy to notice,
with a big dollar thundering big block you'd be so deafend by your own ego I doult you'd notice.
why dont you try one? & try an exhast too the camaro went from 10.0 to 9.89 with areo chambers
the ute does 13s flat open & 12.88 to 12.6s with full exhast, that includes tail pipe
Last edited by SG duster; 12/18/09 08:09 AM.
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