I wondered what you guys thought would be a good throttle body for a 396? There seem to be quite a few out there. Is the twin 58mm that I have seen the best size I can get?
Is bigger better in this case?
Is bigger better in this case?
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'95 TA A4, 118000 on the clock!
Borla, Strange 3.73's, SLP CAI, Vortech elbow,AFS Z06 Wheels,White gauges/blue backlighting,blue custom interior,MBA Shift knob,MadZ28 Tune, Intrax springs, Bilstein shocks, ES Trans Mount, Honeycomb taillights.
13.685@102.11
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I would honestly think that a 58mm TB would work well for your application.Originally posted by jerrysta
There are others that are smarter than me also...so I'd wait for their opinions as well.black 95 t/a, a4, beefed up tranny w/ higher stall converter, transgo shift kit, trans temp gauge, trans cooler, richmond 3.73's, loudmouth, hypertech programmer, 160 thermo, descreened maf, TB bypass and airfoil, trick flow intake elbow, underdrive pulleys, moroso cai, edelbrock panhard rod, bmr stb, slp sfc's, fiberglass firehawk hood, hawk pads, taylor wires, ngk plugs, royal purple fluids,...and hopefully more to come -
A 58 would be the biggest you could go, but I don't know if it would be the best. I think a 52 mm would suffice for a 396 unless you were going with forced induction, but I'm no expert. I know even the stock 48 mm is more than up to the task of a well-modified 350.Dave M
Life, liberty, and the pursuit of all who threaten it!
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Fred says it all in another thread:
EDIT:Just a reference point or two.... my 381ci stroker, turning in excess of 7,000rpm and making 500HP was only using 77% of the flow capacity of the 58mm Holley throttle body. That is confirmed with engine dyno testing. GM puts the same 48mm TB as the LT1 on their RamJet 502ci/502HP crate engine.
Oops, sorry Fred...didn't mean to steal your post.94 Black T/A GT, Advanced Induction 355, 3200 stall, built 4L60E, Moser 9", Baer Brakes, Shooting for 11s...Comment
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The 52mm TB will flow enough air to make 500 flywheelHP. We verified that on the engine dyno with my setup. Even though I have the Holley 58mm TB, the air flow reached maximum at 77% blade opening, and opening the blades farther did not increase air flow.
There is also a 54mm TB made by AS&M that can be considered.
There is no downside to using a 58mm TB on a high HP 396.Fred
381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motorComment
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So would it hurt, lets say a stock car, to put on a 58mm throttle body? i dont think it would but doesnt hurt to ask. And also would there be any power gains there? I dont think there would be any but thought i'd ask that too
96 Camaro Z28, T-tops, 6 Speed, Slp CIA, Flowmaster cat-back, 3:42 gearsComment
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From what I've heard, an oversize TB would actually hurt performance on a stock LT1.Originally posted by 96CamaroSo would it hurt, lets say a stock car, to put on a 58mm throttle body? i dont think it would but doesnt hurt to ask. And also would there be any power gains there? I dont think there would be any but thought i'd ask that too
So, in turn, there obviously wouln't be any performance gains.black 95 t/a, a4, beefed up tranny w/ higher stall converter, transgo shift kit, trans temp gauge, trans cooler, richmond 3.73's, loudmouth, hypertech programmer, 160 thermo, descreened maf, TB bypass and airfoil, trick flow intake elbow, underdrive pulleys, moroso cai, edelbrock panhard rod, bmr stb, slp sfc's, fiberglass firehawk hood, hawk pads, taylor wires, ngk plugs, royal purple fluids,...and hopefully more to comeComment
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I am guessing than that I should perhaps leave the stock throttle body there unless I can pick up a cheap replacement?
500hp is what I am shooting for.
'95 TA A4, 118000 on the clock!
Borla, Strange 3.73's, SLP CAI, Vortech elbow,AFS Z06 Wheels,White gauges/blue backlighting,blue custom interior,MBA Shift knob,MadZ28 Tune, Intrax springs, Bilstein shocks, ES Trans Mount, Honeycomb taillights.
13.685@102.11
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I'd say that a 52mm TB would work just fine...but using a 58mm TB also would work fine and wouldn't hurt performance. You would only be using 77% of its potential.Originally posted by jerrysta
Originally posted by Injuneerblack 95 t/a, a4, beefed up tranny w/ higher stall converter, transgo shift kit, trans temp gauge, trans cooler, richmond 3.73's, loudmouth, hypertech programmer, 160 thermo, descreened maf, TB bypass and airfoil, trick flow intake elbow, underdrive pulleys, moroso cai, edelbrock panhard rod, bmr stb, slp sfc's, fiberglass firehawk hood, hawk pads, taylor wires, ngk plugs, royal purple fluids,...and hopefully more to comeComment
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Ok. I'll look for a 52mm or a great deal on a 58mm.
I guess I should ask: Does the same ring true for the MAF? Is bigger not better in this case too.
I'm just trying to figure out all of these other things I need to add. I know that the injectors for one need to change and I believe the fuel pump as well, but what do you guys think about the MAF? Do I need a bigger/better one?
'95 TA A4, 118000 on the clock!
Borla, Strange 3.73's, SLP CAI, Vortech elbow,AFS Z06 Wheels,White gauges/blue backlighting,blue custom interior,MBA Shift knob,MadZ28 Tune, Intrax springs, Bilstein shocks, ES Trans Mount, Honeycomb taillights.
13.685@102.11
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Larger injectors and a larger fuel pump are a must in a stroker build. I'm not positive, but proabaly 48 lb./hr. injectors would be good, and I'm not positive on the fuel pump. Once again, wait for Injuneer or someone who has experience on strokers to more thoroughly answer your question...all I can tell you is that you will need them.Originally posted by jerrysta
As for the MAF, I've heard from many that keeping the stock MAF is the way to go. I have a good idea where to find some information. Gimme a second to find it really quick, and I'll post in a minute or two.black 95 t/a, a4, beefed up tranny w/ higher stall converter, transgo shift kit, trans temp gauge, trans cooler, richmond 3.73's, loudmouth, hypertech programmer, 160 thermo, descreened maf, TB bypass and airfoil, trick flow intake elbow, underdrive pulleys, moroso cai, edelbrock panhard rod, bmr stb, slp sfc's, fiberglass firehawk hood, hawk pads, taylor wires, ngk plugs, royal purple fluids,...and hopefully more to comeComment
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This is usually a good site to check out when wanting to know what things go into a stroker build.
Granted this is set up for nitrous, and I believe you wanted to be all motor, but there are a lot of good things for reference here
http://members.aol.com/InjuneerZZ/Mod.htmblack 95 t/a, a4, beefed up tranny w/ higher stall converter, transgo shift kit, trans temp gauge, trans cooler, richmond 3.73's, loudmouth, hypertech programmer, 160 thermo, descreened maf, TB bypass and airfoil, trick flow intake elbow, underdrive pulleys, moroso cai, edelbrock panhard rod, bmr stb, slp sfc's, fiberglass firehawk hood, hawk pads, taylor wires, ngk plugs, royal purple fluids,...and hopefully more to comeComment
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I have heard before that 36# injectors were good to 500hp, I am not sure if that is right though. I read that on cz28.com
I am going to buy a set from Thunder Racing that are 42# to be safe. If I can keep the stock MAF that will save me some dough.
'95 TA A4, 118000 on the clock!
Borla, Strange 3.73's, SLP CAI, Vortech elbow,AFS Z06 Wheels,White gauges/blue backlighting,blue custom interior,MBA Shift knob,MadZ28 Tune, Intrax springs, Bilstein shocks, ES Trans Mount, Honeycomb taillights.
13.685@102.11
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I wasn't sure on the 36...I did type in 48 but I actually meant 42. I've heard that 42lb./hr. are good for the amount of hp that you are looking at.Originally posted by jerrysta
I'm sure when Injuneer takes a look, he'll be able to give you all the info you'll ever need
black 95 t/a, a4, beefed up tranny w/ higher stall converter, transgo shift kit, trans temp gauge, trans cooler, richmond 3.73's, loudmouth, hypertech programmer, 160 thermo, descreened maf, TB bypass and airfoil, trick flow intake elbow, underdrive pulleys, moroso cai, edelbrock panhard rod, bmr stb, slp sfc's, fiberglass firehawk hood, hawk pads, taylor wires, ngk plugs, royal purple fluids,...and hopefully more to comeComment
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He's gonna have to start charging us as a "consultant"
'95 TA A4, 118000 on the clock!
Borla, Strange 3.73's, SLP CAI, Vortech elbow,AFS Z06 Wheels,White gauges/blue backlighting,blue custom interior,MBA Shift knob,MadZ28 Tune, Intrax springs, Bilstein shocks, ES Trans Mount, Honeycomb taillights.
13.685@102.11
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