B20 vtec pump gas graph/ intake manifold test pg.2
11-23-2007, 01:22 PM
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B20 vtec Dyno graph! pump gas
UPDATE 2.0L INTAKE MANIFOLD TEST ON PAGE TWO!!!!
Well I finally finished my brother's engine for his car. The engine has 525 miles on it. I was just curious to see what it was at now so i made a couple of pulls.
Engine specs:
Kingmotorsports built bottom end
B20z block
13.1:1 compression 93 octane
Bdl block guard
Mahle 3cc 84.5mm pistons
Stock rods bushed small ends with ARP bolts
Kingmotorsports balanced rotating assembly including flywheel and clutch
Type R head street ported by PURE TUNING
stock Type R valves
supertech springs
crower cro-moly retainers
Skunk2 Pro 2's degreed in at 55* opening on the exhaust@.040 valve lift
Skunk2 Cam gears
Type R intake manifold stock
Type R throttle body stock
RC 310's 96% duty cycle
DC jdm 4 to 1 header
2.5 inch exhaust
Hondata S200
This was not dyno tuned. All i wanted to do is make 5 pulls to see what we are at up to this point. Still conservative timing and just a street tune at this point. I want to see if there is much of a change between now 525 miles and 2000 miles for reference purposes. Vtec felt too late on the dyno at 5300 should be 5000. More charts to follow. Rev limiter was at 8,000 because of the fresh engine.
When we were building this engine I wanted to make the most power we could on pump gas, so i degreed in the pro 2's with a cam gear range from 52* opening @.040 valve lift to 60* on the exhaust cam with the valve to valve never going less than .020. The intake cam position staying at 31* opening. I also degreed pro 3's for a future cam test when its broke in more. So, I will be updating this post over the next couple of months. We will be trying the Edlebrock victor x and a custom intake manifold in the works.
Last edited by BearsEK-KMSU; 02-04-2010 at 09:49 AM.
11-23-2007, 01:38 PM
#2
Re: B20 vtec Dyno graph! pump gas (BearsEK-Kingmotorsports)
Nice numbers. It is inspiring to see how you consistantly put together hi-hp motors with off the shelf stuff.
Isn't 13.1 is a little high for 93?
Do you happen to have flow chart for the head?
Isn't 13.1 is a little high for 93?
Do you happen to have flow chart for the head?
11-23-2007, 01:39 PM
#3
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Re: B20 vtec Dyno graph! pump gas (BearsEK-Kingmotorsports)
Very nice numbers. I do not see 13.1 -1 compression unless you milled the head alot, or the block. What were the head CCs? Deck? Not being pickey, I just cannot there from here, 13.1-1.
11-23-2007, 01:44 PM
#4
Re: B20 vtec Dyno graph! pump gas (DonF)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DonF »</TD></TR><TR><TD CLASS="quote">Very nice numbers. I do not see 13.1 -1 compression unless you milled the head alot, or the block. What were the head CCs? Deck? Not being pickey, I just cannot there from here, 13.1-1. </TD></TR></TABLE>
He's probably pretty close because the standard Pr3 is 42.7 cc and he's using 3 cc pistons. So he's about 39.7 to 40 cc.
He's probably pretty close because the standard Pr3 is 42.7 cc and he's using 3 cc pistons. So he's about 39.7 to 40 cc.
11-23-2007, 01:59 PM
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Re: B20 vtec Dyno graph! pump gas (DonF)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DonF »</TD></TR><TR><TD CLASS="quote">Very nice numbers. I do not see 13.1 -1 compression unless you milled the head alot, or the block. What were the head CCs? Deck? Not being pickey, I just cannot there from here, 13.1-1. </TD></TR></TABLE>
Hey Don, I cc'd everything. The block has .010 off and the head has .030 off it. the chambers were opened up close to bore size. The head cc'd 40.7 and the pistons cc'd 3.16. a stock b20 gasket was used with a little help of honda bond around the oil returns. Th actual compression was 13.08:1 to be exact.
Mar778c
The head flowed pretty good. It was a budget port but the most effective stuff was done. Aaron from Pure Tuning could answer the flow numbers if he wanted.
He told me the intake was close to the drag car head and the exhaust had the same curve but 20 cfm less after the curve platued because of the budget my brother was on, which might work better on the street anyway.
Modified by BearsEK-Kingmotorsports at 5:53 PM 11/23/2007
Hey Don, I cc'd everything. The block has .010 off and the head has .030 off it. the chambers were opened up close to bore size. The head cc'd 40.7 and the pistons cc'd 3.16. a stock b20 gasket was used with a little help of honda bond around the oil returns. Th actual compression was 13.08:1 to be exact.
Mar778c
The head flowed pretty good. It was a budget port but the most effective stuff was done. Aaron from Pure Tuning could answer the flow numbers if he wanted.
He told me the intake was close to the drag car head and the exhaust had the same curve but 20 cfm less after the curve platued because of the budget my brother was on, which might work better on the street anyway.
Modified by BearsEK-Kingmotorsports at 5:53 PM 11/23/2007
11-23-2007, 02:18 PM
#7
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Re: B20 vtec Dyno graph! pump gas (bjones)
i'm doing a very similar build, just different brands, but with pro 1's. how much diff would you expect with this build with the pro 1's?
only peak/high rpm power changes i assume?
only peak/high rpm power changes i assume?
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11-23-2007, 08:59 PM
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Re: B20 vtec Dyno graph! pump gas (vivid 02)
Thanks guys, we are hoping to hit 250 whp on pump that was the goal of this prodject when completely done, i think we are on track so far 
11-24-2007, 07:54 AM
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Re: B20 vtec Dyno graph! pump gas (BearsEK-Kingmotorsports)
Mike,
Another great build. Here is the flowchart for this head compared to a Stock B16A and Stock ITR. This head is nothing fancy and was done a budget as you can tell from the Exhaust numbers. It would be comparable to our Spec-B heads with a 84mm Street chamber.
- Aaron
For Comparison Here is what some of our other heads flow
erikitr - stock vavle size
bonb16a - stock valve size Spec-C port
blb20b16 - +.5mm Valve Spec-C port (newest version)
Last but not least
bearsEK - +.5mm Valve Spec-C port (2yr old design)
Modified by PURE Tuning at 12:25 PM 11/24/2007
Modified by PURE Tuning at 12:26 PM 11/24/2007
Modified by PURE Tuning at 12:27 PM 11/24/2007
Another great build. Here is the flowchart for this head compared to a Stock B16A and Stock ITR. This head is nothing fancy and was done a budget as you can tell from the Exhaust numbers. It would be comparable to our Spec-B heads with a 84mm Street chamber.
- Aaron
For Comparison Here is what some of our other heads flow
erikitr - stock vavle size
bonb16a - stock valve size Spec-C port
blb20b16 - +.5mm Valve Spec-C port (newest version)
Last but not least
bearsEK - +.5mm Valve Spec-C port (2yr old design)
Modified by PURE Tuning at 12:25 PM 11/24/2007
Modified by PURE Tuning at 12:26 PM 11/24/2007
Modified by PURE Tuning at 12:27 PM 11/24/2007
11-24-2007, 08:07 AM
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Re: B20 vtec Dyno graph! pump gas (mar778c)
Impressive 
! The compression ratio seems high for using pump gas but since you can control the ignition timing down low and @ peak torque along with the overlap of the PRO2 cams, you can run it on 93 octane.
Interesting!!! Makes me think that the K series type s cars can run lots of compression on pump gas and effectively bleed off the cylinder pressure by advancing the intake cam @ low RPM's.
Great numbers for a simple build...now back to thinking
! The compression ratio seems high for using pump gas but since you can control the ignition timing down low and @ peak torque along with the overlap of the PRO2 cams, you can run it on 93 octane.Interesting!!! Makes me think that the K series type s cars can run lots of compression on pump gas and effectively bleed off the cylinder pressure by advancing the intake cam @ low RPM's.
Great numbers for a simple build...now back to thinking
11-24-2007, 07:57 PM
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Re: B20 vtec Dyno graph! pump gas (D-Rob)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D-Rob »</TD></TR><TR><TD CLASS="quote">That's crazy power for such a simple setup. 
- Derek</TD></TR></TABLE>
- Derek</TD></TR></TABLE>
11-25-2007, 09:36 PM
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Re: B20 vtec Dyno graph! pump gas (BearsEK-Kingmotorsports)
in socal, i don't know if a 13.1:1 compression motor can be daily driven on 91 octane...that's all we have down here but if you have 93 octane and a well tuned program, that's one sick motor