B20Vtec Probs
 

Just got my hondata tuned and dynoed my setup and came up real short from where I wanted to be. This is my setup:

B16A1 Head P&P, JE Valvetrain, CTR intake Cam, ITR/CTR exhaust cam, ITR IM, Short Ram Intake, B20B block overbored .20mm w/ Wiseco 10:1 pistons, Crower Cams Import Power ingnition/blaster, Accel plug wires, B&M FPR, stock obd1 RC Cleaned and Blueprinted injectors, DC Headers(terrible reweld job they need to go), Hollowed cat/Test Pipe, 2 1/2 inch catback exhaust, AEM Adjustable cam gears, Hondata S100 ecu, CTR Tranny w/ LSD, Jun Flywheel, Exedy Race Clutch, stock: overbored TB, b20b rods, b20b crank, b16a fuel rail

With all of this I only put down 157 whp and 130 ft-lb torque on the dyno. My timing at the crank was off one tooth, which we tried to overcome by adjusting the cam gears, but that only freed up another 4 ponies. Just trying to figure out what could be causing my lack of HP, was expecting around 200, but at least 180 or so, both myself and the tuners were very surprised and disappointed. Any ideas on what might be f--- up or needs to be adjusted I am all ears. Anyone know a quality shop or person in AZ to tear down my engine and troubleshoot? I will not go back to SRD, they are the ones that built it and I have no faith in them anymore, have heard mixed reviews about Import Powerhouse, and don't know of anywhere else to go cept APEX in Tucson, but that is too much of a pain. Lend some help please.

Re: B20Vtec Probs (crvtec00)
 

hmm.. What kind of dyno was this on?

Re: B20Vtec Probs (00MRSi)
 

Why not higher compression?

Re: B20Vtec Probs (00MRSi)
 

if u know the cams are off....fix them that will free up a;lot....cam gears cant fix that!

Re: B20Vtec Probs (vtecdamian)
 

Have you compression tested it? If so what were the numbers that you put down on that?

How is ignition? Fuel? etc.

What size fuel injectors? (sorry if I missed that if you said it...)

I personally would upgrade your fuel rail. If stock injectors work on that. What is your VTEC X-Over? How is your THR?

Re: B20Vtec Probs (Soon2B18Boost)
 

um getting a bigger fuel rail isnt going to do u jack

fix your timing, thats your #1 problem at the moment. Then compression test.

if your compression #'s are around 200-220 then ur in good shape.

go back to dyno then see what you put down.

Re: B20Vtec Probs (irev210)
 

i don't mean just fuel rail... sorry it came out wrong... i was just suggesting a better fuel setup then his current stock setup.

Re: B20Vtec Probs (crvtec00)
 

200 whp is WAY TOO Much to expect out of that setup especially with only 10.1 compression.....and stock honda cams....no way you will get 200 without cams and higher compression

my setup
b20 stock pistons
b16 head
toda b's
p28 chipped
itr intake manifold
dc 2.5 collector header

176 and 136

you probably still have the 2 inch collector header....
you are expecting way too much out of your setup!

Re: B20Vtec Probs (chad)
 

With 10:1 pistons and Type R cams, I wouldn't expect much power at all. Torque numbers look alright though.

Re: B20Vtec Probs (Manuel)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Manuel &raquo;</TD></TR><TR><TD CLASS="quote">B20B block on a Sir2 B16A Head JUNstage 3 cam's,stock B20 Piston 200WHP
B20Vtec B16A ITR cam's, 180WHP</TD></TR></TABLE>


cams make the difference.....what dyno was that on? any bottomend work?

Re: B20Vtec Probs (chad)
 

i think my problem lies in the pistons. it was recommended that i stay at 10:1 to not worry about running on race fuel all the time, but with the b16 head i think the compression is in the 9's. i am probably going to go turbo or new pistons, when i have the money. the bottom end is just pistons. i am planning on going with skunk2's or Jun's once again when i have the $. i had the engine pulled apart and nothing else came up, so that is where i stand thanks for all your input

Re: B20Vtec Probs (crvtec00)
 

who told you if you run higher that 10.1 compression your goin to need to use race gas ...there are people with compression at high as 13 runnning on pump gas ...its all in how good you tune the car ...

Re: B20Vtec Probs (JDM2ndGen)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM2ndGen &raquo;</TD></TR><TR><TD CLASS="quote">who told you if you run higher that 10.1 compression your goin to need to use race gas ...there are people with compression at high as 13 runnning on pump gas ...its all in how good you tune the car ...</TD></TR></TABLE>


like me.....in the b18c5 engine

in my b20....12.1:1 compression....93 octane....

you do need more compression though....do a 2 layer or even 1 layer headgasket...that will bump compression .8 with a one layer and .4 with 2 layer....
maybe get the head milled!

Re: B20Vtec Probs (chad)
 

yea i say definatly bump the compression and just get it tuned really well at a reputable place and you will be fine ...

Re: B20Vtec Probs (JDM2ndGen)
 

i probably will just wait till i have the $ for a turbo kit and go that route. then after the weak b20 falls apart i will sleeve it and be all good. i can't justify spending the 600-800 on new pistons when i can put a decent turbo together for 2-3 times the cost. we shall see. we don't have 93 here in AZ, 91 is the highest pump gas.

Re: B20Vtec Probs (crvtec00)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crvtec00 &raquo;</TD></TR><TR><TD CLASS="quote">i probably will just wait till i have the $ for a turbo kit and go that route. then after the weak b20 falls apart i will sleeve it and be all good. i can't justify spending the 600-800 on new pistons when i can put a decent turbo together for 2-3 times the cost. we shall see. we don't have 93 here in AZ, 91 is the highest pump gas.</TD></TR></TABLE>


91 octane will work too!!! and if you are gonna go turbo there are even more problems to worry about!!!!!! especially in az....

Re: B20Vtec Probs (chad)
 

how high would you push the compression?

Re: B20Vtec Probs (crvtec00)
 

11-11.5:1 sounds good to me. fine on 91 and sweet on the 94 we have here https://honda-tech.com/forums/images/smilies/emwink.gif

Re: B20Vtec Probs (JCushing)
 

yup we got 94 here too ...

Re: B20Vtec Probs (JDM2ndGen)
 

you guys suck, we only have 92 here... that's our highest for pump gas anyways.

Re: B20Vtec Probs (Soon2B18Boost)
 

this is how my compression tested: 130,130,125,130. Right.... so i don't know what I am going to do. I think i will slap some higher comp pistons in for now and prepare the engine to sell. who knows. i am broke so we shall see.

yea, compression is to low, you need rods, and mabee some lightweight stuff. so the moter revs, flywheel perhaps. and like previously stated, timing is #1 priority. and what are you reving to? 8000-8500? and i'm not sure about that ignition setup, factory honda coils are more than enough.

Re: (LudeEFv2.0)
 

I have a Jun lightweight flywheel and after Hondata my redline and rev limiter were set in the 8500-9000 range. I am thinking FI now, but there is a lot of s--- i need to do to make a reliable fi daily driver. I might put higher comp. pistons in then sell the motor in 6mos to a year and buy a fully built LSVtec for FI

Re: (crvtec00)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crvtec00 &raquo;</TD></TR><TR><TD CLASS="quote">I have a Jun lightweight flywheel and after Hondata my redline and rev limiter were set in the 8500-9000 range. I am thinking FI now, but there is a lot of s--- i need to do to make a reliable fi daily driver. I might put higher comp. pistons in then sell the motor in 6mos to a year and buy a fully built LSVtec for FI</TD></TR></TABLE>


give me a month you will see a 220 hp to the wheels b20vtec...with STOCK INTAKE MANIFOLD AND DC SPORTS HEADER!!!

Re: B20Vtec Probs (crvtec00)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crvtec00 &raquo;</TD></TR><TR><TD CLASS="quote">this is how my compression tested: 130,130,125,130.</TD></TR></TABLE>

It' very low compression. Did you do compression test with throttle body plate open? What head gasket are you using?
My b20 vtec made 174whp and 130 ft-lb torque with stock b16 head and intake manifold, gsr cams,IHE, of course completely stock b20 short block. Just 3 dyno runs and not tuned.
http://www.imagestation.com/picture/...7/fc4027d1.jpg