Jdm dc2r, boring out throttle body

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04-12-2007, 08:17 AM
Kiz_EG6

Quote:

Originally Posted by tinkerbell

interesting, so a stock engine will make more power with just a larger throttle body? I wonder why honda sold cars with lower power than was possible? Why dont hondas all come with 65mm throttle bodies? Can you explain why you seem to believe that the honda throttle body is a source of restriction? (and for bonus points, maybe you could discuss port matching the throttle body to the intake manifold once it has been bored out. You know, which might also help the guy with his original question?)

Also, further to the matter, i put a B16B T.B on my stock B16A and definately made more power under this, so i vouch for what yellow-dc2 and toy honda are saying 1st hand :)
04-12-2007, 08:39 AM
tinkerbell

Quote:

Originally Posted by Kiz_EG6

...so if what you are saying is correct, then tell me why honda did not bring all their cars out with factory 4:1 extractors, as these make more power also, it's all about the cost and economy isn't it genious!?!

I would class a throttle body as a bolt on mod and there are plenty of bolt on's which honda could have released their cars with factory standard, which make more power, why don't they release them with a leaner fuel map too?

yes, like the first B16A went from 58mm to 60mm in the 2nd gen, and the Type R's got the 62mm ones...

the ORIGINAL POSTER has a JDM Type R with 62mm

so WHY is he going to GAIN power from boring it out further if he has stock engine?

FYI - i have a B20VTEC, and got my TB bored out to 63mm, and gained power, so i ALSO prove that on a MODIFIED engine it helps...

yellow-dc2 said it would provide power gains on a STOCK engine...

that is all.
04-12-2007, 08:40 AM
tinkerbell

Quote:

Originally Posted by Kiz_EG6

Also, further to the matter, i put a B16B T.B on my stock B16A and definately made more power under this, so i vouch for what yellow-dc2 and toy honda are saying 1st hand :)

feel free to post up the dyno sheets!!!
04-12-2007, 08:47 AM
yellow-dc2

Quote:

Originally Posted by tinkerbell

yellow-dc2 said it would provide power gains on a STOCK engine...

And it will, for the same reason people put XF Falcon Throttle body's on stock SR20's and 4AGE motors, you don't need internal work for gains, the minimum he will need is a cat back exhaust to see considerable improvements.

Honda don't make engines to be the most powerful they can be, if they did this you would N/A 1.8 ltr motors revving to 12K and costing $200 on fuel, they make a balanced car not a super car!
04-12-2007, 08:49 AM
tinkerbell

so do you agree honda matched the throtle body to provide a BALANCE with all the other components??
04-12-2007, 08:51 AM
aaronng

They don't make 1.8L motors revving to 12k because they need it to be reliable for up to over 200,000km, not having to be rebuilt every 20,000km.
04-12-2007, 09:00 AM
Kiz_EG6

Quote:

Originally Posted by aaronng

They don't make 1.8L motors revving to 12k because they need it to be reliable for up to over 200,000km, not having to be rebuilt every 20,000km.

That's exactly right, but they also have to be cost effective, therefore they do not put bigger throttle bodies on, or elaborate induction systems or 4:1 stainless steel extractors etc...
This is why we can improve on the performance of a car with bolt ons and i know from personal experience that a larger or bored out throttle body is definately a good candidate even on a stock engine.

I do not have a dyno sheet to prove this, as the only way i know it had a pick up was;
A) the way the car felt
B) in the diagnostic response i got from my emanage after fitting the T.B and taking her for a run!!
04-12-2007, 09:08 AM
tinkerbell

Quote:

Originally Posted by Kiz_EG6

I do not have a dyno sheet to prove this, as the only way i know it had a pick up was;
A) the way the car felt
B) in the diagnostic response i got from my emanage after fitting the T.B and taking her for a run!!

yes, i 100% agree any engine will *feel* more responsive with a larger throttle body.
04-12-2007, 09:13 AM
Kiz_EG6

Quote:

Originally Posted by tinkerbell

yes, i 100% agree any engine will *feel* more responsive with a larger throttle body.

Again, as i said, the report the emanage gave proves more than just a better "feel"

Besides, there is nothing wrong with a car "feeling" more responsive, that is a good thing, makes you more confident that you can push it that little bit more, sorry i wish i had some quarter mile times or something to prove what it could do... anyone else had experience?!?
04-12-2007, 09:21 AM
tinkerbell

Quote:

Originally Posted by Kiz_EG6

Again, as i said, the report the emanage gave proves more than just a better "feel"

actually *proves* nothing

Besides, there is nothing wrong with a car "feeling" more responsive,

i never said there was.

that is a good thing, makes you more confident that you can push it that little bit more,

not really relevent what its effects on the driver are, is it?

sorry i wish i had some quarter mile times or something to prove what it could do... anyone else had experience?!?

check out http://www.maxbore.com/

and his vouch thread:

http://honda-tech.com/zeropost?cmd=tshow&id=771875
04-12-2007, 10:13 AM
Kiz_EG6

Quote:

Originally Posted by tinkerbell

check out http://www.maxbore.com/

and his vouch thread:

http://honda-tech.com/zeropost?cmd=tshow&id=771875

...So you are now saying that they do give an improvement and you have linked me to a site with people's claims of a gain.
Tell me, have you ever put a larger T.B on a stock B series or not, coz if you haven't then where are you coming from?!?

Oh yeah and you are also saying that a diagnostic from a piggy back system, linked DIRECTLY into my ECU is not proving anything!?!
04-12-2007, 10:17 AM
tinkerbell

Quote:

Originally Posted by Kiz_EG6

...So you are now saying that they do give an improvement and you have linked me to a site with people's claims of a gain.

please, feel free to link all the posts from the Maxbore thread about POWER gains, especially ones from stock engines.

Tell me, have you ever put a larger T.B on a stock B series or not, coz if you haven't then where are you coming from?!?

have not. i am coming from the perspective that understands a bored TB wont provide gains in power on a stock engine, it will ONLY provide a gain in throttle response

Oh yeah and you are also saying that a diagnostic from a piggy back system, linked DIRECTLY into my ECU is not proving anything!?!

please feel free to post up details of your diagnostics :thumbsup:

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