280ZX Breathing better "HP Gains question."

[2Fast280ZX]

I took the resonator, cat w/e put a CAI on and bored the TB.

What am I going to get from all that HP wise?

also would removing my muffler make it breathe better or would it throw off the back-pressure to much?

[evildky]

resonator has no resistance, the cat might add 2-3 whp, the cai, well the stock intake is cold air so I'll assume you put in a cone air filter, maybe 5 whp gain

bored the tb? did you put in an oversized butterfly valve? or did you swap ont he 240 sc tb? whihc is larger and a direct bolt on aside fomr makign the tps work

muffler is more restrictive than the resonator but also gonna make the car obnoxioulsy loud

if you want to make power, swap int he turbo motor

if you want only a few extra hp, F54 flat top block with an N42 head

[kelloggman]

if heard a bunch of pros and cons of turboing the n42 head with f54 blockis it a good idea

[evildky]

the F54 came with 2 different pistons, the flat top in the n/a and the dish in the turbo, you can run the N42 wetih the dished no problem btu with the flat top pistons, with stock engine managment you will likley destroy a piston or 6

after rereading I see my post wasn't real clear, I was suggesting the turbo swap for big power, but if less power was suitable thent he flat top N42 combo was ideal for an n/a build, less power than a turbo but mroe than the low compression stock setup

[kelloggman]

so running megasquirt would help that situationand forged pistons. would that make things better.

[evildky]

forged pistons are only needed if you inend to run lots of boost, high compression n/a generally do not exert enough force to damage the cast pistosn, they have but it's not a real common issue, with turbo's however, it't pretty common

mas for megasquirt, it allows you mroe precise tuning of your engine no matter what setup you run, honestly if I were runing an n/a I'd skid the injection and run tripple webber's or similar, they sound amaing and can flwo enough air and fuel to be realy entertaining, an injection setup could be tuned to make more power across the band but you'd loose the sound and looks of the tripples, maybe thats nto important to you but it's a consideration for me

for turbo, megasquirt all the way!

[usafdarkhorse]

You're not going to get a whole lot HP wise with the mods you've done, but some of what evildky has suggested will definitely help you out.

Alot of guys will swap a different head on their flat top motor and be running around 10.5:1 compression, have great response, and make about 30-40 horses in the process ( and triples sounds great btw ).

If you're looking for serious power, the L28ET swap is pretty simple and will entertain you for quite awhile.

I'm running MS right now on a built '82 L28ET that ( before my alt and fuel pump problems ) was running around 21psi.

[kelloggman]

well as of right now i plan on running f54 block-forged pistons off of msan42 head 450cc injectors with pallnet fuel railmsim thinking im going with the t304estill researching on bov, wastegate, and ic

i just want to know if this is is going to be a problem

[evildky]

tial bov, it's silly to rick an expensive turbo on a cheap bov, I like internal wastegates, much less work, treadstone vertical flow intercooler

[kelloggman]

sorry for the thread jack

compression questionwhat is too high for compression with a turbo apptheres a new nismo mhg on msa thats .6 mm i know that the smaller the gasket is the higher the compression

[evildky]

the thickness f the hg will vary compresion by around .25, if you are running an n42 with a flat top block it might not be a good idea, if you have dished pistons and/or a p90 head you're fine

[usafdarkhorse]

well as of right now i plan on running f54 block-forged pistons off of msan42 head 450cc injectors with pallnet fuel railmsim thinking im going with the t304estill researching on bov, wastegate, and ic

i just want to know if this is is going to be a problem

Everything there sounds pretty good.

I'm running a Tial 38mm WG with a Tial 50mm BOV so I second the Tial suggestion.

[usafdarkhorse]

sorry for the thread jack

compression questionwhat is too high for compression with a turbo apptheres a new nismo mhg on msa thats .6 mm i know that the smaller the gasket is the higher the compression

It depends on how much power you want to make. You can build a nice responsive low boost motor on a decently high compression, as in 9's.

But with the stuff you're wanting to use, I'd maintain either OEM or lower compression as the turbo motors.

[evildky]

the stock turbo comreession is 7.3:1, you can easilly raise that by over 1 comprssion point with no problem, more than that you you need to tune for it, My L30 is 9.25:1

and my Z31 is 9.5:1