bottom end build Help

You are not logged in. [Log In] ClubSi » Forums » Performance Tuning Zone » Turbo or Supercharged Q&A » bottom end build Help

Page 1 of 1

Topic Options

#3378431 - 01/11/09 11:41 AM bottom end build Help
Dustyvip Dustyvip Newbie Registered: 08/05/06 Posts: 25 Loc: UK	Hi i'm just about to build a b16a2 bottom end for boost, the block is going to be looked over and all cleaned up ASP I have got sum EAGLE H BEAM RODS, But i need sum help on whats the right Compression to run? so i can order my pistons looking for a power of about 250 to 350BHP or more Any help will be great thanks
Top

Videos

#3379154 - 01/11/09 04:18 PM Re: bottom end build Help [Re: Dustyvip]
SamuraiSam SamuraiSam Post Master Sr Registered: 07/29/02 Posts: 8828 Loc: Bellingham, WA	Check the FAQ much? Your compression ratio should be determined (and is a balance of) your target horsepower level, turbocharger size, camshaft selection, and boost pressure needed on that turbocharger to meet your horsepower level. These are factors in what is called the "Dynamic compression ratio", which is a major factor (along with proper combustion chamber design, quench area, and piston shape) in determining your mechanical octane, and thus the amount of ignition timing you will be able to run on a given fuel without detonating. You need to make more decisions about your actual goals. There is a big difference in what parts are appropriate at 250whp, to 350whp, and from 350whp to "more." If you wanted to run 300whp with great "response" and a small turbocharger like a GT2871 then you could do it very well with a 10.0:1 static compression ratio, but if you want to run 450whp on a 57 trim TO4e you would be far better suited to a piston that would net you a lower static CR. In summary I cannot recommend a piston type, alloy, or compression ratio without more information from you. Please be wary of anybody who claims to know the magic compression number for you without more information, as they are likely a tech guru on the internet only, with little real life experience and should not be trusted. What type of machine work will you be having done? What bore diameter will you be using? How qualified is the machine shop at working with forced-induction Honda B-series engines? Depending on these factors and the condition of the walls of your cylinder sleeves (as well as your ability to evaluate these conditions,) you may want to take your block to a machinist for inspection before you purchase pistons, or you may want to purchase the correct bore pistons and bring all of your components to the machine shop at once so that your machinist can measure the piston diameter (along with knowledge of the alloy of aluminum used in said piston in determining proper piston-to-wall clearance) to dictate the bore of your block. Eagle rods yay! Made in china and distorted crankshaft out of round FTW. (Send them to your machine shop along with your block to have the 'big end' checked for out-of-round and resize if necessary, and you won't have any issues with em @500bhp+) _________________________ Working and living the dream in post-prohibition Washington State
Top

Page 1 of 1

Previous Topic View All Topics

Index Next Topic

Moderator: M3Pilot or M3Driver, SiAdam, The Mad Paki

Hop to:

Shout Box

CSi Sponsors

ClubSi.com Shirts
ClubSi-Shirts
GameStop
Black-Friday Specials
Big Brake Kits
StopTech.Sale BBK Clearance
Brake Kits
Buy Brake Kits
EBC Brake Kits
EBC Brake Kits
BuyBrakes
Brake Kits-Pads & Rotors Sets
StopTech Brake Kits
StopTech
StopTech NZ
StopTech
StopTech Australia
StopTech
Hawk Brake Pads
Hawk Brake Pads
Samys Camera
GoPros, Cameras, Gear
Brake Specials Near Me
Brake Specials Near Me
Brake Pad Coupons
Coupon Code "hondafetish"
Porsche Brakes
Porsche Brake Upgrades
2-Piece Rotors-Civic Type-R
2-Piece Civic Rotors