mozzandherb

iTrader: (3)

New to N/A, as you can see the motor I have is built for boost and I am looking to sell it, but if I don't I'm wondering how good it can be for N/A? I'm looking to make between 230-250whp. I know that I will want to up the compression, but is the 83mm bore good enough? I also have a built GSR head with Ferrera components, port and polished and a 3 angle valve job. Here are the specs to my build. I am open to using ITB's, I want to get the most out of the motor since I have it.

B18a built by AEBS block
-AEBS T sleeves.
-AEBS O-ringed
-AEBS final bore and hone
-Pauter rods
-83mm Ross pistons 9:1<<will want to change that

GSR Head:
-Ferrera SS stock size valves
-Ferrera titanium retainers
-Ferrera dual springs/turbo
-Ferrara locks
-GSR cams<<will want to upgrade these
The head has been port&polished with a 3 angle valve job. ITB plate welded to the intake with a 71mm billet throttle body. This head output did 198 on a flowbench and choked to 192 with the intake connected.

So with this being said, I know I need to upgrade the cams and change the pistons,(along with the proper header, exhaust and intake). With a good tune on 94 octane with the proper fuel management is my goal of 230-250whp attainable?

Thanks

B20VtecVillain

Stock stroke/crank? I would say with a set of aggressive cams, good tuning, a proper header and ITB configuration you should have no issues making that power at around 12.5:1 or higher comp.

mozzandherb

iTrader: (3)

Yes stock stroke and crank. I figured the compression would have to be pretty high. Thanks

93egSLEEPER

A guy locally has a VERY stout LS/V... looks something like this:

81.5mm ITR rep pistons on stock crank and rods (12.2:1 CR roughly)
Skunk2 ultra street manifold w/ 70m TB w/ RDX injectors
Portflow "street" ported head
Skunk2 Pro 2 cams
Toda rep header

Made 217whp 140tq @ 8500 through a 3" exhaust on a dyno dynamics which is known locally to be "the heartbreaker"...it reads on average 5-7% lower than others.

Another guy I sold my old M22x's to had a similar setup but w/ a performer X intake and 68mm TB and made 212whp 138tq at kaizenspeed.

Food for thought....

B20VtecVillain

With a properly tuned setup using ITBs you should be able to make atleast 15+hp over the majority of aftermarket intake manifolds on the same setup.

93egSLEEPER

^^^^^ if it's worth the time and $$$$ sure. Not disagreeing, but it's not a "bolt on" mod like an IM. There is a science to ITBs most people, myself included, dont understand or take the time to really study because its not worth the time/money.

B20VtecVillain

There's a science behind induction period. Just bolting on a random IM on isnt always the best plan either. Some setups I have tuned have actually lost power and driveability due to poor intake choice relative to their compression, cam profile etc. While I wouldn't advise the average Joe to rush out and go with ITBs, the OP mentioned it specifically and said he had a component or two in the works already for going that route so I figured I would advise him that there are significant gains to be had if he does chose to go that way to get his setup breathing heavily.