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Old 03-31-2011, 10:27 PM
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Default I'm trying to figure out my compression ratio

Using this C/R Calc ---> http://www.summitracing.com/expertad...sionCalculator

I'm not sure what to put for my
(Deck Clearance) and (Compressed Gasket Thickness)
Engine is 2001 B18C1

Here is what I have for the other

Bore: (diameter) 81.5mm
Stroke: 87.2mm
Cylinder Head Volume: 41.6cc
Effective Dome Volume: +7.70cc
Deck Clearance: ???????
Compressed Gasket Thickness: ??????
Number of Cylinders: 4

Here are the pistons I'm looking to use.
http://www.summitracing.com/parts/PBP-11885-50/
Old 04-01-2011, 07:29 AM
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Default Re: I'm trying to figure out my compression ratio

http://www.zealautowerks.com/bseries.html

Not that there is anything wrong with what you are doing, but ordering engine internals for your Honda from Summit is kinda

CP, Wiseco, Arias, Manley, JE all make good pistons for your car.
Old 04-01-2011, 07:38 AM
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Default Re: I'm trying to figure out my compression ratio

Hahaha yeah Roger that. here are the other 2 Im looking at

SuperTech # P4-H815-N2
http://cgi.ebay.com/ebaymotors/Super...#ht_2450wt_939

Or

Arias # 3320200
http://www.anclamotorsports.com/aria.../i-259699.aspx
Old 04-01-2011, 07:48 AM
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Default Re: I'm trying to figure out my compression ratio

lol, yea the compression calculator that gsr posted is by far the most informed and accurate.

also look into mahle. they make awesome parts
Old 04-01-2011, 07:52 AM
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Default Re: I'm trying to figure out my compression ratio

With a stock headgasket and .020 taken off the head and block you will be at 9:1 on the dot with the Arias link you listed.
Old 04-01-2011, 08:06 AM
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Default Re: I'm trying to figure out my compression ratio

Originally Posted by 96 GSR-T
With a stock headgasket and .020 taken off the head and block you will be at 9:1 on the dot with the Arias link you listed.
9:1 on 15lbs of boost, would that give me 350 true wheel HP?
Old 04-01-2011, 08:07 AM
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Default Re: I'm trying to figure out my compression ratio

Without knowing what turbo I cant really help you, on a GSR typically yes unless your running something really small.
Old 04-01-2011, 08:26 AM
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Default Re: I'm trying to figure out my compression ratio

Bore 81.5 (mm)
Stroke 87.20 (mm)
Deck Height 212.39 (mm)

Head
B18C1
Combustion Chamber Volume 41.60 (cc)

Piston
Arias # 3320200
Dome -.10 (cc) Comp Height 30.099 (mm)

Connecting Rod
Eagle
Rod Length 137.90 (mm)

Headgasket Thickness
OEM 3-layer
Thickness 0.026 (in) Bore diff (mm) *

Head Milling and Block Decking
Enter total amount head has been milled and block decked 0.20(in)
Maximum Operating RPM 8500 (rpm)
Elevation 2600(feet)
Boost 15 (psi)
Static Comp Ratio 9.05: 1
Effective Comp Ratio 17.23:1
Displacement 1819.62 Cc
Rod / Stroke Ratio 1.58:1
Piston-to-Deck Height 0.011in
Mean Piston Speed 2051 fps
Max Piston Acceleration 149170 fps2
Attached Images      

Last edited by CaliforniaDad; 04-01-2011 at 08:42 AM.
Old 04-01-2011, 10:58 AM
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Default Re: I'm trying to figure out my compression ratio

You're gonna hate that eBay turbo. Not to mention it has a t04b wheel so it's gonna make shitty power.
Old 04-06-2011, 03:12 PM
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Default Re: I'm trying to figure out my compression ratio

Originally Posted by wantboost
You're gonna hate that eBay turbo. Not to mention it has a t04b wheel so it's gonna make shitty power.
Oh really? what are the pros: and cons:
I got the turbo for a trade.
Old 04-06-2011, 06:17 PM
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Default Re: I'm trying to figure out my compression ratio

Cons: its a POS made in china, it will spool fast and them quickly fall of its face and stay there.

Pro's: IDK of any lol
Old 04-06-2011, 07:54 PM
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Default Re: I'm trying to figure out my compression ratio

what he said... basically
Old 04-07-2011, 06:09 PM
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Default Re: I'm trying to figure out my compression ratio

oh well, it was free. maybe Ill use it during engine brake in and then replace it with a real turbo.
Old 04-13-2011, 07:34 AM
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Default Re: I'm trying to figure out my compression ratio

How about this turbo? Will this be too big for a daily driver?

http://cgi.ebay.com/ebaymotors/Preci...#ht_5773wt_937
Old 04-13-2011, 08:54 AM
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Default Re: I'm trying to figure out my compression ratio

Originally Posted by CaliforniaDad
How about this turbo? Will this be too big for a daily driver?

http://cgi.ebay.com/ebaymotors/Preci...#ht_5773wt_937
That thing will be wayy to lazy with a exhaust housing of .82. It would still be slightly large even in a .63 exhaust housing but not bad if you decide to run more power. Look into a precision 5857 with an a/r .63 exhaust and an a/r .60 compressor housing. You will have a much more usable powerband. I ran that on my gsr and I make 400 on 16lbs using 93 oct. Mine was even a cast wheel journal bearing 5857.

Last edited by 4cylfiend; 04-13-2011 at 08:58 AM. Reason: I cant read.
Old 04-14-2011, 07:37 AM
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Default Re: I'm trying to figure out my compression ratio

What about the Holset turbos? I heard those can make good power and the spool super quick.
Old 04-14-2011, 08:02 AM
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Default Re: I'm trying to figure out my compression ratio

personally Id stick with a Precision or a Garett. I just got my mine in the mail yesterday.

Old 04-14-2011, 08:15 AM
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Default Re: I'm trying to figure out my compression ratio

Originally Posted by 4cylfeind
personally Id stick with a Precision or a Garett. I just got my mine in the mail yesterday.

Is that your turbo in the picture? What is the rating on that one? how is the spool time and power range?
Old 04-14-2011, 08:39 AM
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Default Re: I'm trying to figure out my compression ratio

Ya its mine. Its a billet 6262. It has a .82 a/r exhaust and a .70 a/r compressor cover. Its rated to the 700whp range, but I know alot of ppl who have made 750-800 on them. This will not be a effecient turbo for your setup. The powerband will be useless.
Old 06-11-2011, 09:01 AM
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Default Re: I'm trying to figure out my compression ratio

Am I doing something wrong here? Is this CR going to be too low?


Block
B18C1
Bore 81.5(mm)
Stroke 87.2 (mm)
Deck Height 212.39 (mm)
Crank B18C1 (GSR) Year 2001
Head
B18C1 Combustion Chamber Volume 41.66 (cc)
Piston Wiesco 81.5mm
Dome -12(cc)
Comp Height 30(mm)
Connecting Rod Eagle
Rod Length 137.998(mm)
Headgasket Thickness Cometic 3-layer 81.5mm Thickness .027"(in)
Bore diff 0.00(mm) <-----NOT SURE
Total amount head has been milled and block decked <---NOT SURE
RPM Redline 9000
Elevation 2600 ft
Boost 5-16psi
Static Comp Ratio
8.63:1
Old 06-11-2011, 03:35 PM
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Default Re: I'm trying to figure out my compression ratio

Can anyone chime in? am I doing it right? See above
Old 06-11-2011, 04:11 PM
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Default Re: I'm trying to figure out my compression ratio

if you smooth the chamber you'll have more than 41.6ccs also depends on what valves you use. personally i'm all about oem or ferrera.

piston wise, i really don't see a reason to build a 9:1 street engine

if you use the ferrera dished valves and shave the deck and block to being true along with an oem head gasket you should fall right around 10:1-1 to 10:5-1 with the below piston, it really all depends on how you work the combustion chamber and how much winds up being shaved

http://cgi.ebay.com/ebaymotors/MAHLE...item359cbed057
Old 06-11-2011, 06:49 PM
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Default Re: I'm trying to figure out my compression ratio

Sorry I already got my pistions. Wiesco
http://www.importparts.com/shop/prod...oducts_id=5994
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Old 06-11-2011, 09:05 PM
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Default Re: I'm trying to figure out my compression ratio

ahh.. those are dished. it will work, just will require more pressure than a flat top.
Old 06-11-2011, 09:10 PM
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Default Re: I'm trying to figure out my compression ratio

Originally Posted by racebum
ahh.. those are dished. it will work, just will require more pressure than a flat top.
More Boost?? I like the sound of that
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