[fieroid]

Finally got a chance to do a v-box run of my Honda City Vtec with mild works, since my dyno run of 95whp at RRP.
http://www.team-bhp.com/forum/modifi...ml#post2202602

Acceleration test from standstill.
0-60kph - 3.65 secs
0-100kph - 7.47secs
0-400kph @ 148kph
0-160kph - 21 secs

The ECU tune and all the mods was done by me and the difference is very interesting. Considering all the internals are from factory and has Zero fancy stuffs.
Mods are,
Full stock bottom engine with my cylinder head work
(195psi on all 4 cyls), stock valvetrain, stock cam-gear, stock clutch, stock flywheel, 4.25 FD, stock CAMSHAFT, my custom exhaust system, my custom cold air system, D15 Intake manifold, BMC twin air filter, Stock OE TB, Stock OE injectors, self tuned Race Dynamics ECU, custom coilovers and stock wheels with 195/60 RS2s.

Would post the next level of tune. The engine had gained 13whp with the cylinder head work alone. Now estimated to make well over 130bhp at the crank with the dyno correction factors removed. Happy with the figs gained with full stock internals. Will add the fancy bits when I get some Vitamin - M

Joel

[santhoshs]

Originally Posted by fieroid

Finally got a chance to do a v-box run of my Honda City Vtec with mild works, since my dyno run of 95whp at RRP.
http://www.team-bhp.com/forum/modifi...ml#post2202602

Acceleration test from standstill.
0-60kph - 3.65 secs
0-100kph - 7.47secs
0-400kph @ 148kph
0-160kph - 21 secs

Is this your new project after the R15? Great work my friend.

I am closely following your work at xbp.

[fieroid]

^Nothing after the R15. That is always on. This is my street car and just having some fun with stock internals. When I get serious, will start dropping in parts.

[abhinav.s]

Whoa!! Amazing buddy. Start working on other car engines too. Specially the Korean ones

[Mpower]

How much is the compression and what octane are you running?

[Surviving Brain]

0-100km/hr in approximately 8 seconds sounds insane! If you don't mind, keep the pictures coming in!

Originally Posted by fieroid

0-400kph @ 148kph

I have this feeling that there is something wrong with the data you've shared with us.

I assume that you mean 0-400m @ 148kph

[killjoy]

nice but looks like all the power is towards the initial acceleration and drop in top end?

[fieroid]

@Mpower - Running 87 octane pump gas. I run 195psi on all 4 cyls. I dont need high octane.

@surviving brain - Ooops, I actually meant 400mtrs @ 148kph. Its not around 8 secs to 100kph, its well under 0.5secs too.

@Killjoy - Well, the weight of the car plays the major bit when trying to clock speeds over 100kph. I was on my way back home when I did this run, with full mass and the car weighing 960 kilos. Not a single stuff was removed.
Most pro-stock Hondas that compete in the drags, run full fibreglass stuff, lighten all the internals and are effectively over 100 kilos lighter which give them a better 100+ kph acceleration. The fastest clocked of any NA Honda City in the country is 14.8x secs and the next best is 15.3x secs by our own forum member ssjr. All these cars will fully lightened and running all the works. Considering, I'm running no performance internals and its just my time spent with the engine and nothing else, I'm looking good. I'm now at 15.5 secs to 400mtrs with 960 kilos. All the cars in the pro-stock class use nothing less a 4.6FD ratio. I run the standard stuff.

[mashmash]

Awesome stuff man, I am sure we will soon be hearing news of you breaching the 15 sec mark. All the Best.

[killjoy]

fieroid, im not questioning your numbers but saying that the numbers look more towards improved accelartion vs. improved top end performance if you look at it as a percentage.

[GTO]

Superb numbers, can't argue with a V-Box.

I'm mighty impressed with your setup which only goes to prove, how important it is to get the basics right. You've shaven 2.xx seconds over that of a stock Vtec!

Originally Posted by fieroid

4.25 FD

What is the stock FD? I have a feeling you touched a 100 in 2nd gear? That alone saved you atleast a second (stock Vtec needs an upshift to 3rd for a 100 ).

[killjoy]

how can you change speed in gear if you have not opened the gear box?

[ssjr0498]

@ GTO!

The stock FD of a vtec is 4.05 Joel is using a 4.25.

The numbers will fall further very soon. As Joel said, if here were to lighten the car, he would have gained a couple of tenth's itself.

@ Joel, great going! 15 seconds is by no means a big feat by any standards! I am waiting for you to do low 14's and I know that you can do it easily.

@killjoy: He did open the gearbox and change the final drive to 4.25, you could get one from a 1.3's gearbox. Also, the reason why he looses out on after the 100kmph mark is cuz of his ..oops! Cars weight + the low torque that our vehicles have. I think if he would have striped the car to its bare minimum, his quat mile timing would have been close to a 15 flat.

@joel Dude you just set the ball rolling bro! Let's meet up sometime.

Cheers
Shrey

Originally Posted by GTO

What is the stock FD? I have a feeling you touched a 100 in 2nd gear? That alone saved you atleast a second (stock Vtec needs an upshift to 3rd for a 100 ).

[fieroid]

Originally Posted by GTO

Superb numbers, can't argue with a V-Box.

I'm mighty impressed with your setup which only goes to prove, how important it is to get the basics right. You've shaven 2.xx seconds over that of a stock Vtec!



What is the stock FD? I have a feeling you touched a 100 in 2nd gear? That alone saved you atleast a second (stock Vtec needs an upshift to 3rd for a 100 ).

Thanks man. Yes I have shaved nearly 2.5 secs to 100kph over a stock car. Considering most drag spec Honda Vtecs in the country are in the sub 8 secs territory, I've got it with street tune and not much sweat or fancy money. No compression, no internals nor fancy fuel. Have spot-on AFRs and the whole sequence was done with my own logics. Nothing traditional as the usual trend is.
On a stock Honda City Vtec, with just the limiter bumped to peak 100kph in 2nd gear itself, wont shave you too much. More like 0.2 - 0.3 secs. Not a full second.
I was clocking 8.8 secs to 100kph with stock gearbox, stock ECU, stock airbox, manifold etc and just my custom exhaust. One full second shaved only with the exhaust. I indeed had to shift 2 gears to 100kph. You need more power when you are trying to cut such numbers.

@killjoy - Weight is the factor again. Will post up if I can ever do a run the same engine tune with stripped down weight. Should cut me atleast 0.4 secs to the quarter. And like I said, with a very short FD. You need more torque to the wheel to cut times after 100kph. Till then you have good acceleration inertia.
A stock vtec takes nearly 24 secs to clock 100-160kph in an acceleration test thru the gears. I do it in, 12.5 secs. I guess thats enough emphasize on the top-end acceleration.
Yes, I opened the GB to change the FD to 4.25.

@shrey - Thanks for the detailing mate. We will meet this weekend

[kutlee]

looks like FI is unnecessary for good improvements. Nice work. IS it RD901?