klabatzie

Not that i know off.
People do portmatch the primary to the intake runner on the engineblock because there is quite an difference in size. I understood that it's to prevent blowback of the mixture in the intake

t_g_farrell

iTrader: (1)

I'm pretty sure Jeff has gone into it in detail in some threads on here. Search for threads he
has created and start reading. Note that other than channeling the rear part of the intake
and slight porting there to make the secondaries the same size, no other porting should be
done. Do not port match the intake ports to the engine ports, you will loose the lip that helps
reduce reversion waves coming back to the carb.

chuyler1

iTrader: (1)

Ok got it, I think I did see a few posts on the channeling, wasn't sure if it was still recommended.

wankel=awesome

the runners on the primaries can be opened up a bit, RB manifolds have a spec size that I copied. Port "matching" is bad.

klabatzie

Oke lets get on topic again haha

I test drove only on primairies tonight and its a bit lean 13.2 13.5on WOT
Idle is 13.6 witch is nice
On partial throttle and cruising about 80km/hr its around 14, 14.5

I think i have to get an 118 jet for the primairy because the first jet i tried was an 120 and that was too big (about 11 at WOT) problem is to get the correct jet because my supplier doesn't has them listed.

Also checked the spark plug color and that seems good to me.
The darker one is the front rotor

(Edit) (found my other jets again�)

Installed the 120 primaries and it got a tad richer (slightly colder outside)
13.5, 14 on cruise
12.2 to 13.3on WOT (depenting on RPM)
I have a 122 but think that will be too rich for sure maybe ill try it just too see what it does.

One thing that wonders me is that depending on accelerator position +/-75% it can get real lean but when i floor it it will get richer again.

I'm also curious what effect float hight and airbleeds have on mixture. I know one can affect the other but how much it matters.

Jeff20B

iTrader: (13)

70 air bleeds are the only size you will ever need.

wankel=awesome

Sounds like it could be a little richer up top if you ask me.

12-12.5:1 around 5k rpm UP (wot) will net you some extra power, and smooth your torque curve.

those plugs should be a slight darker too. Your primary jetting isn't your bottle neck from the looks of it. If it cruises happily, and doesn't starve, the lean side saves gas. Harder to start, more cold blooded, and less torque part throttle though.

it's a 4bbl, so your focus on power should be emphasized on the secondaries. Go fat. With your upgraded ignition it'll fire even through AFR''s as low as 10:1 without breaking up (if it's direct fire), and you'd be surprised how little power you lose by being "too rich".

Give the engine what it wants. Looking at the plugs, it looks like it wants more to eat up top.

pm me and I can walk you through reading your plugs, and I highly recommend the use of GSLSE plugs to make it that much easier.

Jeff20B

iTrader: (13)

I wouldn't use 2nd gen plugs in a 1st gen, even with direct fire. I like BR8EQ-14

t_g_farrell

iTrader: (1)

I've been using the rx8 plugs, kind of pricey but worth it to me. They seem to fire better than any other
plug and they will last a lot longer.

Jeff20B

iTrader: (13)

I'd like to try RX-8 plugs next.

klabatzie

NGK 6700 
{#3514, RE7CL} Laser Iridium
Leading; Gap 0.048"; Actual OE Part
These ones?

I had them in before the 2gen plugs i have the idea that it feels stronger now.

t_g_farrell

iTrader: (1)

Yeah I think those are the ones. Don't remember the part number just got leading spark plugs for an rx8.

klabatzie

Didn't have much time lately but tried to find some info on porting the intake manifold.

I know portmaching the primary is not helping performance wise so I'll leave them alone

The secondairy only needs some cleaning up and than it will be good to go.

I changed the sparkplugs to the BR8EQ 14 but idle isn't smooth as with the second gen sparkplugs so I'll change them back. Will order the Rx8 plugs and see what those do

I think i've done the most i can do to an stockport so if this doesn't get more power then i have to leave it this way

klabatzie

Found out that the dyno I've tested on doesnt work properly so maybe i will go to an other one to confim the results.