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#1
04-10-2003, 05:18 AM
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Larger throttle body & intake manifold
Theoretically what would be the gains from a 70mm throttle body along with a port and polished intake manifold which has been port matched to the 70mm throttle body. I take it the ECU would need to be remapped, but would I need larger injectors? If so what would be my options/price.
Any problems I could possibly encounter? Also would this put me in good stead for a possible turbo application in the future. Any advise appreciated. Thanks!
__________________
1991 CRX siR 1991 CR-X Si 1993 UK 2.2 4WS - FOR SALE 2005 Lexus IS200 - SOLD 1990 MX-5 
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#2
04-10-2003, 09:09 AM
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Anyone?
__________________
1991 CRX siR 1991 CR-X Si 1993 UK 2.2 4WS - FOR SALE 2005 Lexus IS200 - SOLD 1990 MX-5
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#3
04-10-2003, 10:03 AM
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in the best case scenario, i'd say you'll get about 10hp from the throttle body
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#5
04-10-2003, 05:06 PM
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your car will learn and adjust to the new amount of air going into the engine
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#6
04-10-2003, 08:08 PM
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It will do more harm then good, if other stuff is not done first. What have you done to the head? Vavle job? P&P on intake and exaust, header, exhaust?
If you dont work on those things first, you wont gain anything.
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#7
04-11-2003, 04:15 AM
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Thanks for the replies, so far I have a HKS header, induction, custom exhaust and Hondata chip. I’ve been told the car will adjust to a certain point but not that much. As I have a Hondata chip re-mapping isn’t a problem, but would I need larger injectors?
The throttle body comes with a port and polished intake manifold to match. Didn’t realise about the loss in torque though.
__________________
1991 CRX siR 1991 CR-X Si 1993 UK 2.2 4WS - FOR SALE 2005 Lexus IS200 - SOLD 1990 MX-5
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#8
04-11-2003, 02:14 PM
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How the hell are you going to lose torque?! Do people even know how HP is made?! Geeze.
IM and TB would be a good next step, then it would probably be a good idea to get a cam.. You shouldn't need bigger injectors, your car really shouldn't be demanding that much more fuel just from basic bolt ons.
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"The nympho of info, I'm fuckin' what ya heard" 
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#9
04-11-2003, 02:31 PM
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I've been told that the injectors run almost flat out at peak power on a stock SiR, there isn't much headroom (and winding the fuel pressure up is a bit of a bodge).
__________________
1991 CRX siR 1991 CR-X Si 1993 UK 2.2 4WS - FOR SALE 2005 Lexus IS200 - SOLD 1990 MX-5
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#10
04-12-2003, 02:48 AM
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Quote:
Well my boy bought BBK tb for his gsr. He lost tq! 113 lbs of tq when he dyno'ed I'll see if he has dyno sheets for his ride.
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#11
04-12-2003, 03:57 AM
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Any one know where i could pick up a 70mm TB for cheap
__________________
My Name is Roberto AKA. Berto
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#12
04-12-2003, 08:27 AM
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see waht more air does is it keeps the torque up at higher rpm instead of going down. so with the torque leveling off, and not dropping, u get an incease in hp up high
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