k20z1ej1

whats up guys, im new to Hondatech and have a serious question. Im building a b20 vtec and would like some thoughts on the best IM for a 250ish whp goal.
To give you an idea of what im building, here are things i already have:

84.5mm nippon P30 pistons
Stock rods and crankshaft
acl bearing
stock port GSR head
Pro 2s
no valvetrain yet
Highend (Logic Motorsports) race header

will be run on race gas, although im not sure what type yet, prob the most agressive fuel i can run without having to drain it after every time i drive it (ie no methanol)

thanks in advance guys

43!

iTrader: (3)

I made 250 on the skunk2 ultra street with 169# of tq. Pro2's and e85.

k20z1ej1

thank you, those are good numbers, what header are you using?

43!

iTrader: (3)

Smsp design, 3" collector

PSI GUY

iTrader: (2)

Street car or race car?

k20z1ej1

mostly race but ill drive it on the street prob 25% of the time

k20z1ej1

if you guys have thoughts on fuel, id love to hear those as well

GSRcivicSon

the edelbrock victor x makes good power on b20v setups, and also won't break the bank. if you're shooting for 250 I would def consider porting your head. as for fuel I'd say e85 if its available in your area. draining the tank isn't necessary, just run an ethanol fuel stabilizer and make sure you start your car up pretty often when its not being driven.

PSI GUY

iTrader: (2)

Ported ITR or VictorX, I had posted a dyno comparison somewhere in this section comparing the two on a B20vtec.

vtecmaster85

I'd say use victor x IM and open the TB opening to about 70mm or so if you want to achieve that power. make sure you have at least a perf.valve job/port work from a reputable source.

93egSLEEPER

Check my build thread out. Victor X and 70mm TB

k20z1ej1

Your build thread actually motivated me to get off my *** and build another engine, for reals. Seeing pro2s and other shelf parts make 240 convinced me to quit ******* with h2b and all the associated headaches.

To everyone else, thankyou for the suggestions and shared experiences. I tghink an itr or victor x will be the best budget decision. Ill post dyno sheets once i get it up and running

B20VtecVillain

Before I went K my all motor car was always a B20V variant. Last one was similar in power to what you are after; 84.5x89, 12:1 CPs, ported B16 head, Pro2's. I ran a ported Skunk2 V1 (ITR copy) for quite some time, and made 235 with that manifold. I then switched to an off the shelf Ultra Street and retuned and was able to make 244 while picking up a few ft/lbs as well and not losing any power in the midrange of the curve. Had I ported this manifold I feel the gains would have been even greater, so I would have to suggest that as a good option personally.

B20VtecVillain

As for the fuel, I personally did not like E85 for my basic all motor cars. It is more difficult to tune, consistency is all over the place, you need a huge fuel system compared to gasoline, and from a realistic stand point you really can make about the same power gasoline as e85 with a basic all motor setup. Forced induction or crazy 14:1-15:1 compression may be a different story, but even for that now I use Shell URT gasoline. A great alternative to race fuel or ethanol for getting the absolute most out of your all motor car is regular 93 pump gas plus an additive called simply "Race Gas". This is what I ran after ditching E85, and never looked back. I made more power more easily and never had a hint of knock. You can really ramp up the timing and get aggressive with the AFRs on this stuff to squeeze every last HP out of your tune with ease. It's a little more pricey than E85, so that's a downside, but it's still only the price of 93 gas plus an extra $1 or so per gallon, so not extreme. I was mixing 3oz per gallon for my 12.5:1 B20v, and paying around $12 for 32oz of the additive. I also turned a customer on to this stuff who used to run Sunocco GT100 on track days paying almost $10/gallon in his 9 sec 1000+ HP GT500 and he has been very happy as well. For street fuel, that is what I will continue to use over E85, on track I will always now recommend Shell URT over C16 and similar fuels. For boosted cars or DI cars though E85 certainly has its place.

TheShodan

iTrader: (14)

I love this stuff. When I don't make my own meth/water mixture for my turbo car, I use this.

Will never use E85.

V-SPEC 1

So how do u really mix this with say 93 octane pump gas? Say u want around 105 octane, do u just fill up the car and pour whatever oz u need into the tank after you fill it? Or pour the 93 into jugs and then the racegas.

TheShodan

iTrader: (14)

For the concentrate like shown you use jugs of 93 then add the correct amount to the additive mixture to create the octane level needed. There are given ratios on the can to show what parts of race:93 to use.

Like mixing 2-cycle oil to gas for a blower or lawn mower.

m_shake

according to their website to make 93 into 105 you would need to add 6 ounces per gallon.

93egSLEEPER

But how does it smell? We all know the real reason we like real race gas

To get 105 octane you would need 6oz per gallon. so you can treat 5 gallons at a time per 32oz container for $30 (plus shipping). 5 gallons of 93 is what...2.75-3 per gallon? (WA pricing) So roughly $40-50 per 5 mixed gallons? I can get Sonoco 110 locally for $9.50/gallon which has more octane and nice cooling additives and whatnot.
I see the method behind the madness but not really much money savings in the long run. Maybe I'm a negative *******. I just prefer to hit the pump and not have to worry about conducting a chemistry lab for fuel. Not knocking it, just not my cup of tea. I still like filling my VP can w/ pump E85 for 3.25/gallon.

43!

iTrader: (3)

3.25! You're getting the shaft. Its like 1.69 here.

93egSLEEPER

There are only 2 stations of pump E85 within 50 miles of me, it's not popular up here at all. I'm just lucky the station I use is only 15 mins away lol.
Gas is expensive as **** over here. 87 is around 2.70 right now and 92 is 30-40 cents more per gallon. Diesel is right around 2.85.
What's sad is we have refineries all over the place here and pay the most for the fuel we make in our own back yard. CA is the same way

wunfstgsr

I heard of a manifold by Pro Jay but dont know much about it but id say SK2 ultra street ported with plenium stacks.


​​​​​​​Honda B-Series 4 Injector Port Intake Manifold with