im trying to decide which motor to go with, b20/vtec on boost or b18c(gsr) on boost, i'm looking to get 400hp+. i would like some opinion, and why, thanx

 

Neither engine will support 400whp unless Forged items are added.

GSR starts cracking ringlands around 320-345whp
B20vtec @ 14psi is all she can handle forged or not.
350whp is about it for her too.

i've built both stock & forged and blown them both around that hp level.

I suggest doing the GSR because blown up it is still worth something & it is the best platform to start with.

Just my .02

 

well i do plan on building the engine (ie. sleeves, pistons,rods, studs, gasket, etc.) was just wondering what might be a better setup

 

We'll i'd have to put my money on the GSR 100% for sure......

 

i wont be able to make more power from the b20vtec?

 

in the long run i'd have to say no look at almost all ndra/nhra pro comp teams, theres no b20vtec there. only in all motor there are a few lsvtecs also all motor.

besides the b20 blocks do not have any oil squirters, which can hurt you on a street car.

yes there are some 600-700+hp b20vtecs out there, but, how long are they lasting.

look around all the big horsepower engines are all GSR.


i know all of our big hp engines have all been GSR.

dont just take our word for it. give it some time for other members to chime in & you will hear different theories.

Rob@TPR

 

dont listen to that guy up there.... if you are doing sleeves and the whole nine yards then go ls/vtec or b20 vtec (b20 is just a bored out ls, harder to find and generally more costly to attain)

the 89mm stroke means more torque and displacement... sure you cant rev to the moon, but you can spool a bigger turbo quicker. for example on my 2.1 liter fully built ls/vtec with the turbo i ahve i can make 500whp @ 18psi on 93 octance

 

How are you going to say not to listen, he asked for input.

you are running a lsvtec. 500whp

i have a gsr 630hp on a consertive tune

i have built some radical lsvtecs but their temper mental they will not rev out saftly.

any correct engine build will make alot of power it is all in the tuning but how much tuning is the question.

like i told him stay tuned there will be alot of different answers.

 

good point. your gsr sounds badass. whats your setup if you dont mind me asking? im betting this pull was on a race fuel of some sort?

here is my setup... except im bumping up to 1680cc injectors

heres a complete rundown on the motor/tranny setup. overall its about 2.1liters in displacement... turning it to 10k. i can make 500whp daily @ 18psi on 93 octane
Block
b18a1 block
darton mid sleeves
84.5mm cp pistons, 9:1 cr
manley rods
acl bearings
knife-edged, micropolished, chamfered and fluted ls crank.. also had the oil gallies drilled, honed and plugged.
race fluidampr
golden eagle electric waterpump kit with idler blockoff (will be running reverse cooling system to give head the coolant first)
ITR Oil Pump
Golden eagle ls/vtec conversion kit

Head.
GSR Head
Stage 5 porting and polishing by RPMnyc
Ferrea Valve Guides
Supertech 1mm oversize black nitride coated valves crower springs and retainers
ITR Cams with AEM Cam Gears
Ferrea VTEC Killer rocker arms (coming soon)
Custom intake manifold by RMPnyc
75mm Mustang throttle body
Golden Eagle Head Studs

Turbo

Fab-works manifold, downpipe and dumptube
Tial 44mm wastegate
Turbonetics Raptor BOV
PWR FMIC
Custom built garrett gt series turbo
custom 3" intercooler piping

Fuel

complete aeromotive fuel system, pump regulator, etc.
10-an feed line and 6-an return
sumped tank
ERL Fuel Rail
Precision 1000cc Injectors

Drivetrain

OS Giken twin disk clutch
Gator Stage 3 Axles
OBX LSD (ya ya, but they changed who is making them and fixed all of the problems)

Electronics

AEM EMS
AEM UEGO Wideband (gauge type)
AEM 3.5bar map sensor
GM Boost control solenoid
GM IAT sensor
potentially running a coil on plug setup

 

Here is a link to the car w/ some pictures.

http://www.tprcincy.com/forum/...d=164

 

the show stopper... pm'd you

 

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