Project Hi Comp N/A

[JayRome]

my N/A project engine has begun...

2.5mm decked head
1mm decked block
10:1 comp (maybe more)
ported and polished head
balanced bottom end
4-1 extractors
custom intake
supercharger (if i can find one)

doin this all on a budget!!

not expecting huge power but wanting power spred over rev range...

i'll keep this updated on progress for the N/A guys out there.....
(sorry if piks are to big)

Jerome

 

[vsthis]

Hey mate, You might want in on this group buy.

http://4gtuner.com/forums/viewtopic.php?t=5951

I hear they are getting massive Hp gains from these units. And for your project, You could get all the fully sic coolness of turbo sound but still stay N/A!

 

[JayRome]

oh yer bro, might get more hp if we add the shoppin list too lol :lol:

 

[JAP63]

have you read up much on NA Porting?
i read a bit a while ago..seems like an exact science an u can go backwards if you get the wrong dynamics occuring..which from what i read didnt seem to hard to do.

 

[JayRome]

yer i got a few calculations up on paper on how much to take off and how smooth it has to be, but i really wana supercharge this BIATCH and or quad throttle. soo the porting is quite mild only soo wont effect any way round..... i hope..... should work very well with the SC though.....

 

[Entaran]

Good luck to him for DIY'ing.

An N/A head even if he screws it up is like a couple of hundred dollars max.

Sounds like a good investment to me!

 

[JayRome]

dont think any thing can go rong as long as you dont go nuts on the porting. as long as the exhaust side is still smaller then the intake side by a certain percentage, its fine..... the faster you can ram air into the engine and the faster you can get it out is tru for power, but you must still have a some restriction for everything to work correctly...

if all goes bad for the n/a engine, i can always turbo it

 

[GVR40]

Good luck to him for DIY'ing.

An N/A head even if he screws it up is like a couple of hundred dollars max.

Sounds like a good investment to me!

na heads and turbo heads are identical appart from the cams

 

[EVO-00X]

I know exacly how you feel dude as did mine myself as well :twisted: What Jap63 said earlier is right. Just be careful that you dont flatten the angle of the air entering the chamber as you need the angle (bump) to make the air flow as close as possible in a direct route toward the valves, and not horizontally across them. Sharpening the split in the ports is good to increase air velocity :wink:

 

[JayRome]

oh i'm basicly just widening the port a lil and smoothing off the bumps and cast marks, cant gain much but efficiency is better.....

 

[rob323]

Its not hard to set up a simple flow bench with a vacuum cleaner so you can see what works and what doesn't.

 

[JayRome]

YAY parts from Japan came in, New valves and Guides.... its slowly getting there..... hopefully in a few months.....

 

[JayRome]

okies up date, only time i had to play with my engine and i'm grinding the valves atm.....

to show you guys how much i had the head shaved, take a close look at the piks below.... compression should be hopefully freakin high!

 

[DOUGMO]

what fuel are you going to run in this beast!

 

[JayRome]

heheh i ono good stuff? lol

 

[DOUGMO]

are running bigger cams also?

what is the valve clearance like?

a mate and i are looking to do a similar engine for an early rwd galant

 

[JayRome]

yer looking into 264's i believe it was just mild not wild..... um clearance..... lets put it this way.... the only thing stopping the Valves from hitting the piston is the thickness of a stock head gasket thats been squished........... the highest point of the intake valve sticks out past the bottom of the head by round .8mm..

the guys at the engineering place i got my heads and valve guides done did some calc's and they recon i have close to 11:1 compression... i wont know till i do a comp test later on.... doesnt bother me as long as its high lol 8)

 

[JayRome]

update very lazy these days so i got to cleaning the block and pistons.....

 

[JayRome]

fark.... its takin me from May this year to finish this damn thing!... wow got lazy along the way.....

ARP head stud kit is on......

just shoved the head on before..... all valves sealing beautifully!! no leaks at all! couldnt move the crank without takin out the sparkies...

will do a comp test to figure out what my actuall compression is... (put it this way, if i had flat top pistons, the lowest point of the intake valves would be 1mm from the top of the piston with the stock HG)

its comin together very very slowly....

 

[bazeng]

will do a comp test to figure out what my actuall compression is...

the proper way is to cc the head and cc the pistons in the block...

looking good mate