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Old 29th March 2011, 12:46   #16
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Default re: Honda City VTEC High Compression build.*UPDATE* And she runs!!

Buddy!

for once I am glad im wrong!! Good luck man!



Quote:
Originally Posted by pranavt View Post
@alpha1, konjaril: Thanks!




Thanks. Chipped an OBD1 Honda ECU, which is why the conversion harness. Our cars have an OBD2B harness which requires conversion.


Thank you for the concern, but I've seen quite a few of these builds, not just one. What was funny about his was the kind of arrogance shown by the tuner towards his own client. My build won't be compared to his, I assure you.



And you honestly didn't think I was targetting a lowly 14.8 with drag slicks and lightening, were you?



And it's funny to insinuate that I'm being secretive about my build. I'm posting pictures of the whole build, listing what parts I'm using without needlessly putting "custom" in front of every part I list, and you accuse me of something that is very much unlike my belief. I'm hurt. LOL.
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Old 30th March 2011, 15:22   #17
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Default re: Honda City VTEC High Compression build.*UPDATE* And she runs!!

Awesome build, love the new pistons and the deck. Keep it coming man.
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Old 30th March 2011, 21:52   #18
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Default re: Honda City VTEC High Compression build.*UPDATE* And she runs!!

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Originally Posted by Mpower View Post
How did you oversize it, drilling?
Hi,
Am I missing something?

Regards
Sutripta
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Old 30th March 2011, 22:55   #19
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Quote:
Originally Posted by Sutripta View Post
Hi,
Am I missing something?

Regards
Sutripta
Quote:
Originally Posted by pranavt View Post
The engine was taken out. The block was given a fresh 75.5mm bore.
Hence the question. whats the stock bore size BTW?
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Old 31st March 2011, 02:57   #20
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Default re: Honda City VTEC High Compression build.*UPDATE* And she runs!!

Stock honda bore is 75mm x stroke 84.5mm,one of the picture clearly shows the boring machine mounted on the block which bore's out the cylinder to 75.4x and the rest is matched in honing the cylinders depending upon the piston to wall clearance and honing pattern (45,60,90) decided by the person building the engine,hope this helps,great build pranav,standard head bolts? may be arp's would just be an added safety ,cheers,happy revving..!
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Old 31st March 2011, 09:06   #21
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Default re: Honda City VTEC High Compression build.*UPDATE* And she runs!!

Yes, a cylinder boring machine like dragger said. Stock bore was 75mm. But like any engine that has seen over 60k-70k kms, the cylinders weren't perfectly round when measured with my bore gauge. Just swapping to new standard size pistons would've created a smoke monster.

Sticking to standard head bolts for now dragger, I don't think the build is wild enough to require ARPs lol.
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Old 31st March 2011, 13:32   #22
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Default re: Honda City VTEC High Compression build.*UPDATE* And she runs!!

Hi,
Quote:
Originally Posted by Mpower View Post
Hence the question. whats the stock bore size BTW?
Thought that 'drilling' was some sort of private joke. Hence the question.

Quote:
Originally Posted by pranavt View Post
Yes, a cylinder boring machine like dragger said.
Is it being honed on a boring machine with a honing head?
How many Sunnens and Rottlers in Bombay?

Regards
Sutripta
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Old 31st March 2011, 14:16   #23
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Default re: Honda City VTEC High Compression build.*UPDATE* And she runs!!

Good Stuff Pranav....
Respect.

How much did the pistons cost?
and are they forged?
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Old 31st March 2011, 18:06   #24
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Default re: Honda City VTEC High Compression build.*UPDATE* And she runs!!

Quote:
Originally Posted by Sutripta View Post
Hi,
Thought that 'drilling' was some sort of private joke. Hence the question.
Sorry,no. It didn't feel correct to say boring the bore so I said drilling. But I guess after a certain dia, technically drilling becomes boring. (but the results are anything but boring).

Ah! the nuances of this silly language..

I guess the other ways of oversizing is getting new liners and natural wear of the bore.

Quote:
Originally Posted by pranavt View Post
The block being honed after oversizing to 75.5
Attachment 524573
More pics will come later.
Quote:
Originally Posted by dragger View Post
Stock honda bore is 75mm x stroke 84.5mm,one of the picture clearly shows the boring machine mounted on the block which bore's out the cylinder to 75.4x!
Which pic? No, its not clear to me because I see only the spindle and not the tool. Besides the note above the pic says block being 'honed' 'AFTER' oversizing.

Last edited by Mpower : 31st March 2011 at 21:47.
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Old 31st March 2011, 18:30   #25
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Default re: Honda City VTEC High Compression build.*UPDATE* And she runs!!

Quote:
Originally Posted by Mpower View Post
Sorry,no. It didn't feel correct to say boring the bore so I said drilling. But I guess after a certain dia, technically drilling becomes boring.
The method of material removal is different for drilling and boring. The cutting points are different too and it ain't boring
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Old 31st March 2011, 21:22   #26
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Default re: Honda City VTEC High Compression build.*UPDATE* And she runs!!

Quote:
Originally Posted by Mpower View Post
Sorry,no. It didn't feel correct to say boring the bore so I said drilling. But I guess after a certain dia, technically drilling becomes boring. (but the results are anything but boring).

Ah! the nuances of this silly language..

I guess the other ways of oversizing is getting new liners and natural wear of the bore.

Which pic? No, its not clear to me because I see only the spindle and not the tool. Besides the note above the pic says block being honed AFTER oversizing.
Haven't uploaded a pic of the boring job, I believe my friend has a few pics. The pic you are referring to is of the block being honed on the Sunnen.

Quote:
Originally Posted by Sprucegoose View Post
Good Stuff Pranav....
Respect.

How much did the pistons cost?
and are they forged?
Thanks man. Cast pistons. Pistons cost somewhere in the region of 125-130 USD MSRP. Plus whatever the shipping and customs duty comes to.

Quote:
Originally Posted by Sutripta View Post
Hi,

Thought that 'drilling' was some sort of private joke. Hence the question.


Is it being honed on a boring machine with a honing head?
How many Sunnens and Rottlers in Bombay?

Regards
Sutripta
Honed on a Sunnen honing machine. Stone.


As for updates, the head will be ported tonight and the will be bolted on the block tomorrow or the day after for claying. As per my calculations, there is enough clearance to run even a very high lift cam without having to modify the valve reliefs, but claying will give me solid numbers. Once everything is triple checked for clearances, the engine will be reassembled and installed on Sunday.

Last edited by pranavt : 31st March 2011 at 21:29.
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Old 1st April 2011, 04:56   #27
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Default re: Honda City VTEC High Compression build.*UPDATE* And she runs!!

Time for a few indulgences

Honda City VTEC High Compression build.*UPDATE* And she runs!!-img_66742.jpg

Last edited by pranavt : 1st April 2011 at 05:05.
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Old 1st April 2011, 22:17   #28
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Default re: Honda City VTEC High Compression build.*UPDATE* And she runs!!

Chrome plated tappet cover eh ?

1) By the way how did u calculate the compression ratio to be 10.6:1 ?
I know the formula but how did u manage to measure the volume of combustion chamber ?

2) What fuel will u be running ?

3) Any links which explain or show how the claying process is exactly carried out ?
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Old 1st April 2011, 23:33   #29
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Default re: Honda City VTEC High Compression build.*UPDATE* And she runs!!

Not chrome

Yes, measured the volume of the combustion chamber. Google it, it's pretty simple, just use a syringe or something which can measure accurately.

Pump fuel.

Take some clay (even your homemade atta will do), make small round balls and press it into the piston where the valve reliefs are. Then put the head gasket on and bolt the head with the same torque specs that you will be using when the engine is finally assembled. Put the timing belt on along with the tensioner and spin the crank by hand. After 1 full rotation of the cam gear, take the head off and observe the shape of the clay. Google it, you'll get some nice pics.
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Old 4th April 2011, 02:20   #30
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Default re: Honda City VTEC High Compression build.*UPDATE* And she runs!!

Is this car gonna run in the next drag? Looking forward man. 14.8 is tempting .
And also would like to see a dyno plot, if possible.
Once done, also post some performance numbers.

Good luck.

Joel
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