Compression suggestions
 

I'm running a 91 CRX Si with at b16a1 swap, I would like some comments on the build that i'm going to be doing or if any one has any alternate suggestions for me would be great.

Head Work:

Port and polish including 3 angle valve job
Skunk2 stage 2 turbo cams
Crower valves springs and retainers

Lower end:

SRP forged pistons with forged connecting rods .20 oversized My question here is what compression ratio should i go with to see best results with this setup

Turbo:

I'm not sure yet i've been doing some research probably t3/t4 area

Re: Compression suggestions
 

9 or 10 flat no more for a DD.

Re: Compression suggestions
 

I have personally ran 13:1 on 94 pump gas all day long in a b18a w/ PCT and head milling.
Currently have a 12.5:1 n/a sohc d on pump gas also.
Both mind you, are/were DD.
it all depends on where you live(what quality and octane fuel you can get), How well you can tune ( or how well your tuner can tune),and what duration your cams or cam in my case ;) is.
The bigger the cam, more duration= more compression bleed.
In a N/A setup i would run a long duration cam and high lift.
For a turbo setup same rules apply as for where you are located and how well you can tune, But forced induction seems to like a shorter duration, less overlap, and high lift.
B-series:

Springs + Titainum retainers: $335

(Boost)Level 1, Billet: $665; 0.455/0.415 (253/247 deg)

Level 2, Billet: $665; 0.455/0.415(260/250)

(N/a) Level 3, Billet: $665; 0.488/0.470 (272/270)

Level X, Billet: Call**

**Custom Rocker assembly: $1605
straight from www.bisimoto.com
What i added In bold above is what i would go with if i were you. I would not run any other cam besides bisi's they are just beautiful works of art :) Anyways i hope this helps a lil, as for compression i would go with 10.5 with your setup and have a nice snappy lil setup w/ reduced lag. But i wouldnt take to much of that from me i aint gonna lie ima a N/A guy :)

Re: Compression suggestions
 

Im not even going to bother to read your Naturally asphixiated madness.

You didnt really answer the man's question, and in that entire para. you said absolutely nothing relavant to his setup.

Static compression ratio does NOT affect spool time. Despite what you may have read elsewhere.

This is not necessarily true. This depends greatly on the setup, turbo size, head flow capabilities, intercooling system(piping and all) effeciency, exhaust manifold design, etc...

Then why the hell bother posting your irrelavant and inaccurate response?

Im not TRYING to be an -------, but this is not H-T and nobody really cares about faggot slow n/a cars.


^^^^simple concise accurate answer. :6

Re: Compression suggestions
 

so your saying that it all depends on what type of intercooler and turbo setup i go with correct

Re: Compression suggestions
 

No just about any ebay ching chong meow intercooler will do the job, but tuning is key. Are you getting it tuned professionally? Are you OBD1? At or below stock static compression will be fine, as long as your tune is right.