Q for don88t/a.....
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Joined: Jul 2000
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From: helldon, fl
Car: 87 trans am GTA
Engine: tesla permanent magnet
Transmission: 93 T-56
Axle/Gears: moser 12bolt w/ 3.73
Q for don88t/a.....
in regard to your remark out a 58mm TB being to big for a 350. how do you figure out exactly what your car needs.
i didnt really have a choice since mine(BBK 58mm) was given to in trade for installing a tranny kit.
i've seen 355's with similar combo's using a 58mm and running fine. so far i have not had any problems as far as drivability, throttle response, low end perf.
my assumption is this...since the superram intakes have a large plenum they can store plenty of air , a larger TB would supply the flow to keep the plenum full right?
also arent the flow ratings on TB measured without duct work, MAF's, and filters installed? i would guess that since most 58's are rated at 1000cfm , by the time you add the items listed above it would drop it down a bit not drastically but enough.
i'm not saying your wrong nor am i trying to be an expeert on volumetric efficency here...but if a throttle flowed 1000 cfm and a gutted maf flows lets say 750cfm would the throttle body only flow 750 cfm? therfore meeting the needs of a smaller motor. since most bad-*** efi cars run DFI's alot of them dont use restrictive stock-bodied MAF's(3") and reap the true benefits of 58mm(4.4")
just thought i'd ask.
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87GTA ,10.5:1,4-bolt 355,afr 190's, super ram ,stock poerted base,58mmTB,24 lb FMS inj. ed wright chip, .510/230 (nr) 1&5/8 hooker shorty's, flow master single 3", 2800 ameri-torque non lk-up, 3.73. best to date with stk 48mm tb and lack of traction in 1st gear netted me a 12.9 @110mph
/91 TA daily driver LB9 A4 2.73,
sitting in the garage : 26-11.5-16 et streets, sphon LCA's &rlb's, SFC's, b&m mega shifter....hope to install before the next century!!!
i didnt really have a choice since mine(BBK 58mm) was given to in trade for installing a tranny kit.
i've seen 355's with similar combo's using a 58mm and running fine. so far i have not had any problems as far as drivability, throttle response, low end perf.
my assumption is this...since the superram intakes have a large plenum they can store plenty of air , a larger TB would supply the flow to keep the plenum full right?
also arent the flow ratings on TB measured without duct work, MAF's, and filters installed? i would guess that since most 58's are rated at 1000cfm , by the time you add the items listed above it would drop it down a bit not drastically but enough.
i'm not saying your wrong nor am i trying to be an expeert on volumetric efficency here...but if a throttle flowed 1000 cfm and a gutted maf flows lets say 750cfm would the throttle body only flow 750 cfm? therfore meeting the needs of a smaller motor. since most bad-*** efi cars run DFI's alot of them dont use restrictive stock-bodied MAF's(3") and reap the true benefits of 58mm(4.4")
just thought i'd ask.
------------------
87GTA ,10.5:1,4-bolt 355,afr 190's, super ram ,stock poerted base,58mmTB,24 lb FMS inj. ed wright chip, .510/230 (nr) 1&5/8 hooker shorty's, flow master single 3", 2800 ameri-torque non lk-up, 3.73. best to date with stk 48mm tb and lack of traction in 1st gear netted me a 12.9 @110mph
/91 TA daily driver LB9 A4 2.73,sitting in the garage : 26-11.5-16 et streets, sphon LCA's &rlb's, SFC's, b&m mega shifter....hope to install before the next century!!!
Thread Starter
Member
iTrader: (2)
Joined: Jul 2000
Posts: 386
Likes: 0
From: helldon, fl
Car: 87 trans am GTA
Engine: tesla permanent magnet
Transmission: 93 T-56
Axle/Gears: moser 12bolt w/ 3.73
it is kinda of a long and boring post 
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87GTA ,10.5:1,4-bolt 355,afr 190's, super ram ,stock poerted base,58mmTB,24 lb FMS inj. ed wright chip, .510/230 (nr) 1&5/8 hooker shorty's, flow master single 3", 2800 ameri-torque non lk-up, 3.73. best to date with stk 48mm tb and lack of traction in 1st gear netted me a 12.9 @110mph /91 TA daily driver LB9 A4 2.73,
sitting in the garage : 26-11.5-16 et streets, sphon LCA's &rlb's, SFC's, b&m mega shifter....hope to install before the next century!!!
------------------
87GTA ,10.5:1,4-bolt 355,afr 190's, super ram ,stock poerted base,58mmTB,24 lb FMS inj. ed wright chip, .510/230 (nr) 1&5/8 hooker shorty's, flow master single 3", 2800 ameri-torque non lk-up, 3.73. best to date with stk 48mm tb and lack of traction in 1st gear netted me a 12.9 @110mph
/91 TA daily driver LB9 A4 2.73,sitting in the garage : 26-11.5-16 et streets, sphon LCA's &rlb's, SFC's, b&m mega shifter....hope to install before the next century!!!