modding a b16a2.

[stndrd]

If the valvetrain has be sufficently upgraded, you the need to think about piston speed and the extra forces created by higher piston speeds. A few hundred rpm extra would be alright, but I have met people you spin their b/k series over 10,00rpm and it would be under these conditions that damage to the bottom end would happen possibly

[kutso]

so by bottom end you mean bearings letting go? how long do they last revving to 9k on stock motor?

[stndrd]

by bottom end I mean bearings, crank, rods, pistons. Bearing life has to many variables to say they last xxxkm. I have seen a couple of built high reving gt-r's that have warped the crank over time by setting the rev limit to high, tho personally haven't seen it on a honda, tho mysterious things always happen

[vtecing]

Honda upgraded it for a reason. Im not a mechanical engineer, they spend millions on research so ill take advise from them over an ozhonda member any day

[GSi_PSi]

If all else fails, quote honda.

the power of dreamers

[TheSaint]

If all else fails, quote honda.

the power of dreamers

i lold ...

[Egcivicduty]

I dunno, I just assumed the reason for the upgrade is to do with the b16b and 18c just not being as inately balanced as the 16a
But I dunno, lol
Maybe they just did it cause it sounded cool

[jdm18c]

my mate had a b16a and had toda spec c cams and reved to 9k all day everyday on a stock bottom end, the thing was reliable as only sold it not long ago but done the cams around 3-4 yrs ago so it lasted no drams

[GSi_PSi]

Dont get me wrong, its a good thing they counterweighted it, as the B16B and B18CR/7 engines are more likely to be tracked which i guess would serve the purpose quite well,
do i believe it is 100% necessary no... as the op stated he might be looking at the track later and is not using this engine to be a hardcore trackwarrior.

What im having trouble understanding is that 'vtecing' said it will not cope revving out to higher rev's, without any evidence only just stating that honda upgraded the crank with more weights , so should you.
Futhermore people with B16a engine who have the shorter deck, unlike the B16B cannot fit the (rare as fck to find and expensive) B16B crank into the block anyway without purchasing custom rods and cannot fit the B18CR crank without purchasing custom pistons.
The stock B16a crank can handle 10,000rpm all day everday

end rant/

[TODA AU]

Dont get me wrong, its a good thing they counterweighted it, as the B16B and B18CR/7 engines are more likely to be tracked which i guess would serve the purpose quite well,
do i believe it is 100% necessary no... as the op stated he might be looking at the track later and is not using this engine to be a hardcore trackwarrior.

What im having trouble understanding is that 'vtecing' said it will not cope revving out to higher rev's, without any evidence only just stating that honda upgraded the crank with more weights , so should you.
Futhermore people with B16a engine who have the shorter deck, unlike the B16B cannot fit the (rare as fck to find and expensive) B16B crank into the block anyway without purchasing custom rods and cannot fit the B18CR crank without purchasing custom pistons.
The stock B16a crank can handle 10,000rpm all day everday

end rant/

Fair comment with the rant except the pistons are actually sheft items from Toda.
The same forged pistons used in this kit will do exactly what you're saying
http://www.toda-racing.co.jp/en/prod...a-1800kit.html


The pin height (Compression height) is 21.5mm, allowing you to either used std B18C crank & rods in a B16A or B16B crank & rods if you wanted to stay at 1600cc.
The down side is they're single ring pistons so if the ring gap ( 0.20~0.30mm) & piston to bore (2/100mm to 3/100mm or 0.0009" to 0.0011") isnt spot on, the motor can be a bit smokey untill it's up to temp.
For a roadie, erring to the tight side is preferable. Race engine, go to the loose side.
That said, it's tighter than stock.
Anyway, this kit has a few NSW IPRA championships under it's belt, so it works.

For best results, you'd use it with a PR3 head, modified to have a P72 CNC chamber.
+ some clever port work.
You've got room to move decking the bock & the head at the piston is below the deck height on a vigin block.
(-0.010" B18C crank & rods / -0.030" B16B crank & rods)

Oh, & the other down side when used with a B16B crank is the comp would be near stock at around 10.0:1
They can be ordered with alterntaive crown design for increased compression though, allowing you to have a 1615cc B16A with 11.8+:1 C/R or 1820cc B16A with over 13.0:1
Anyway, enough babbling, I just though you guys migh be interested.

[TODA AU]

lol one dude back in the day had a B16a with Toda Spec C cams revving out to like 9200rpm on the stock bottom end. He ran a 13.9 with 4.9FD in a CRX delsol....
made 118kw atw tuned by toda..

Speaking of Charb's car, the last one I tuned was his cousin's which he built.
Also a B16A2 (stock bottom end) in an EK4 VtiR & it made 124kw @ the wheels.
Again it was using Spec C's
Intake manifold was Edlebrock Performer X with Itr throttle (I think)
Exhaust manifold was a Bisimoto * copy with 2.5" Ex
The additinal trick with this one was the use of a no core shift in the head & moving to a CNC valve job from RAMS (In Windsor)
Std B-series use 3 angle seats, but the K's use 5.
Moving to these angles gives you a 5kw leg up accross the rev range over the original 3 angle seats.
As a side note it also lets you increase the overlap for improved mid range without loss of top end or idle quality.

Notes re header,
I was pretty impressed with the top end these gave though the mid range was a little down.
That said the power delivery was clean & smooth from 4500rpm up but that is typical of a good 4-1.
Fitment was apparently a bitch, so if you're going to use these, I'd say you'd be better off with real ones.
http://bisimoto.com/store/index.php?...roducts_id=360
Plus in my experience for some reason the real deal headers aways seem to out power the coppies.
Personally I think it's to to with attention to detail on the stepped primaries & collector etc
In any case, they * look like these ones (4-1)

[GSi_PSi]

Nice, what does that one rev out to Adrian ?.