I know you can do some slight modification on the B16 intake manifold and make it work on a A20a. I was just wanting to know if you can do the same thing for an ITB setup?
B16 ITBs on A20a
I know you can do some slight modification on the B16 intake manifold and make it work on a A20a. I was just wanting to know if you can do the same thing for an ITB setup?
yep
unless you want to just spend money. ITB's are only worth having if you have some pretty decent amount of internal motor work.
Straight from TODA USA's website about their Sport Injection ITB kit:
Q) I have a completely stock car, how much power will the TODA Sport Injection Kit add?
A) This is a very common question that we get on daily basis. The answer is Sport Injection Kits are designed for cars with extensive modifications. On a stock vehicle, engine only allows certain amount of air to travel through, so by adding Sport Injection Kit, consumers will not see any benefit.
Q) How much power should I expect with TODA Sport Injection Kit? If I have a fully build car?
A) It really depends, the main purpose of the Sport Injection Kit is to increase throttle response at high rpm operation. It was never designed for steet cars that does bumper to bumper daily commutes. We strongly recommend high compression pistons, performance camhshafts, adequate engine management system that reads off the TPS sensor and so on. We are seeing anywhere from 10-20hp increase on smaller displacement vehicles and 40-50 on bigger displacement cars (TODA C35B NSX).
http://todaracingusa.com/article?t=6&id=11
1993 Integra LS [DA9] - miss the hell out of it.
1984 Chevy S-10 [2.8 2bbl POS] - Daily
1989 Honda Accord Lx - In progress
i'm doin just that thing on my b20a
using 20 valve 4age quad throttles but i plan on having big cams and the other usual shit.
you can get decent results on a mild tune motor
betta throttle responce, betta top end etc
but for a dd its prob not worth it unless you have an after market ecu and plan more mods down the line
there are big arse quad throttle bodies available for the b16,18 etc but they are fing huge big
50mm plus things aimed at racing only and would be wankers to tune for low speed and throttle openings.
but at the end of the day its your car to do what you want to do with
will post pics of my project when my quads turn up
^ are you using blacktop 4age quads on yours?
nah, silver top
i know they arnt as big, but its only 2 or 3 mm diff.
they still flow as much as 45 dcoe webers thanks to the fact they dont have venturis
so me thinks they'll be heaps for what i want.
am also thinkin bout using the 4age and b20 injectors but use the link plus to stage the 4age ones to come in as secondaries.
that way i figure i wont hav the prob of trying to tune big arse injectors for low speed running.
will see how it looks when i get shit finished.
otherwise will just use b18c injectors.
wont get it done for a while
got bout 5 fuckin homers oer the next month plus i want to get the body work finished first
oh true lol, i got silver top 4age quads on my b20, i just bolted them straight on the head though. needs port matching, they're pretty close though, but blacktop 4age ones would have been way closer. hopefully i can start it tomorrow.. i like the sound of the 8 injectors though, sounds pretty cool. i would make some runners up for mine if i could weld lol. i needa do some other engine mods too to put the quads to good use
i have an enginering shop down the road who will weld the quad throttle flanges to the b20 inlet once i cut it down t the right lenght .
am getin another b20a from a wrecker for $200 so am going to build the quad throttle ser up on that while i build it up with the good cams and shit.
once its all done i'd say she'll be good for 160hp at the wheels or there bouts.
she'll be fun to drive and eat my 5g sir me thinks
Honda engines are notoriously bottlenecked at the exhaust and inlet side so adding a custom header and exhaust made by a race specilalist combined with a custom inlet and ITB's or Weber DCOE's will allways give you excellent returns on our honda engines newer ones yes not much difference but the older ones yes big difference. When i first put Weber DCOE 45's onto my stock ET engine which all i had done was very crude head work and mild cam a 115bhp engine was making 150bhp and that was with stock header and system. B20A is the same crazy restriction on the exhaust and inlet (come on uses same TB and intake setup as A20!!) and the same style exhaust with just 1.75" piping. How they get 160bhp is a miracle!! So get rid of exhaust, and TB and one very lively engine, i have a EDM spec one with just a custom made exhaust and FPR, custom CAI, modded throttle body, and F22 map sensor and it really screams not had a chance to rolling road yet as the body is under major restoration but it doens't take much to get a lot more out of these thats the main reason i love there early honda motors so much with just a bit of work they turn out to be real beasts hiding in sheeps clothing!!!! I'd imagine a B20A on ITB's would sound pretty amazing too considering any headwork??? Theres a lot that can be done to improve the port shape around the guides and also on yours running ITB's i'd have the old injector ports welded up and consider remachining some quality stainless steel inlet valves to 30mm and using those as exhaust valves, also get the stock cast manifold ported and flowed inside and make sure you open up the two oprts that join onto the custom downpipe your hopefully having made so that they match perfectly they are really small as stock and have a real nasty lip before it joins the piping this really dramatically improves the exhaust system.
my itb experience using a set of 02 cbr 954 rr throttle bodies
notice top end improvement, i never had it dyno'd but i can tell you that, that a20 came very alive with them on.
my mods were:
ported a20 a3 intake flange /jb welded runners.
stage 2.5 colt cam
catless pacesetter exhaust w/flowpro muffler
stock revlimiter kinda sucked @ about 6250 as the car really became alive at around 4500 rpm.. wiere as before it would flaten out and die around 6000.
didnt have to much time with it as the runners broke off the flange after about a weeks time.
just going for a mild port and get rid of the valve guide that sticks into the port.Originally Posted by rjudgey
thinkin bout b16 pistons ,flywheel and eagle rogs or similar
undecided on the cams and rest of valve train but nuthig to manic
done the math last nite and factory b20a piston speed is about 20 meters per second at redline and i dont want much more than that.
dont want to be rebuilding every 30,000 km
a18a has the same itb idea as me and has them bolted up and it looks the shiiizzz
am sure he'll post a pic or two yall ask nice
am sure this will be the next craze on 3geez
hope you got money cuz rebuilds are not cheap
1989 Honda Accord LX-i
B18c1 swap since 7/2011
175whp and 132tq
Redzone tuned
am a mechanic so the parts and machining are cheaper than what joe average would pay.
its just finding the time to do it all and the tuning which will take the lion share of my cash
have to finish the bodywork and paint it first.
the motor will be done over the next year i spose.
just accumulating the bits first.
have my quad throttles sorted.
should be here in a week or so if my mate can move his arse and dig them out
have just sourced coils off a nissan vq30 for my coil per cylinder set up.
am going to use the fact dizzy for the trigger since it has inductive pick up all ready.
$3k for an ecu fitted and tuned
so it'll all run me $8k finished i spose
plus body work
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