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Discussion Starter · #1 ·
Who makes 65+ TB's for k-series? I really don't wanna chuck down $500-$600 for a spoon 70mm and I don't perfer getting my stock k20R tb bored out. Are there any manufactures who make them billet like many offered for B-series?
 

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not to sound like i know it all, but increasing the t/b size wont gain any power at all. doug from hondata and a few people i know have the spoon and they say they didnt feel anything, and the dyno showed no gain( its not the t/b that is restrictive).
unless ur motor is tuned up pretty well, then it might make a difference. as for spending that amount of money on a intake part, try get the dc5r intake manifold.
 

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Discussion Starter · #4 ·
asldjfa

I have a k20aR therefore I have already the DC5R IM. I really don't see why not an overbore TB would produce any horsepower or torque gains for a k20a. If it didn't, wouldn't companies NOT produce them at all?

Quoted on one of hondata's webpages.

"We have seen combinations (short ram cold air 50 cm straight velocity stacks on a K20A engine mounted in a Lotus.) where the bored throttle body makes a difference. "

That k20a that they dyno'd I'm pretty sure it was in near stock trim with an exception of a CAI,TB,& reflash. I'm sure there would be even better results with an overbore TB with a mild to wild tuned k20a with some cams, headers, and intake.
 

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as much as i can say i doesnt help and u show me info to say it does, this aint gonna come to an end. cos its just gonna go back and forth. i can only stick to my guns on what ive heard and seen.

at the hondata seminar in london when doug was here, he asked the dc5 jdm itr whether the spoon throttle body helped at all. he said no, and then doug went on to saying that it aint restrictive.
as for the k20a and k20a2, is there a difference in t/b size?
and do you know which engine was in the lotus?
plus, i think that the 50cm straight velocity stack made a difference in the flow rate into the intake.

its too hard to say, but its your money and your call
 

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Re: asldjfa

optimus said:
"We have seen combinations (short ram cold air 50 cm straight velocity stacks on a K20A engine mounted in a Lotus.) where the bored throttle body makes a difference. "
that statment is only there to passify that nice man from Protohype raving so that he can sell is 'velocity stack' intake (ie. long ali tube with a filter on the end)

Take it from me, I have tryed just about every combination of intake, and they make squat difference, the plenum is the restriction, not the TB or ahead of it.

tip1: take the TB off and measure the matching hole in the plenum, how big is it?

Tip2: How big are the intake runners in the plenum?
 

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Discussion Starter · #7 ·
sadfas

Thanks for both of you guys feedback. It should help me weigh in on whether or not I should pick one up now. I've built mild to wild B-series motors and I've had good success in running overbore tb's on stock to aftermarket plenums. Considering they were port matched and all. Just thought the concept would be transferred to k-series. Might look into IM porting and opt for a overbore tb but looks like I'm might just gonna pass and use the 300-500 bucks in a nice cam setup. Thanks again.

~Ron
 

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no problem optimus (prime) :lol:
IM porting on the k should work really well. especially cos the honda finish aint the greatest. as for doin the work, should be a piece of piss. cos of the way u can just open up the i/m with a socket set and not a die grinder. :p
 
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