Eg.ls.turbo

Sup ht wanted to see if anybody has the same setup and what their compression is and what's the best spark plug gap for the compression?

My setup

Gsr block
-ls crank
-ls rods w/ arp rod bolts
-usdm type r pistons
-acl race bearings
-golden eagle oil squirters plugoff

Gsr head
Low impedence accel 255cc injectors
-supertech dual valve springs
-supertech retainers and keepers
-stock gsr cams and cam gears
-oem yonaka 3layer mls headgasket
-skunk2 pro series manni
-4-1 2.5in yonaka series2 headers
-golden eagle intake manni gasket
-blox extended intake studs
-2.1/4in straight piping w/4in muffler

Also would 87 gas b ok to run on?

doood

iTrader: (1)

Stock gap. Do not try running anything less than 91 on that.

Eg.ls.turbo

Ok thanks. I have mine gap at .45, the ngk said to gap to .55?

Eg.ls.turbo

Damn I ran 89 gas, no wonder it ran like ****. Thanks for the heads up though

Eg.ls.turbo

anybody know my compression and is my spark gap ok?

HiProfile

.044 is the common gap, you'd only reduce it if it starts breaking up, misfiring, etc. This assumes it's been tuned and not lean or pig-rich.

You may need to step up to a colder plug, since the ITR uses a heat range 7 plug vs 6 of GSR/etc. It's unlikely since you're still using GSR cams. You'd really have to research the topic "reading spark plugs" and do what it suggests. We can only give suggestions w/o seeing pictures of fresh plugs after the first WOT pull or seeing a dyno graph with a low amount of smoothing.

Eg.ls.turbo

Ok I hear a putt every 2-3 seconds I guess I need to close the gap more? And the spark plug has white specs on them like its been running to lean? It's on a base map tune till I can save some money to tune it on dyno.

Eg.ls.turbo

Closed the gap to .041 and I still hear like skipping while idling anybody know why?

I though it was spark plug too large so I reduce it. Any ideas

Thanks in advance

JRCivic1

Your basemap is probably too lean. Don't beat on it until after you have saved the $$$ to get it tuned. If you have an adjustable fuel pressure regulator, you could increase the fuel pressure 10-12 psi and see if the lean condition goes away.

Eg.ls.turbo

Can the distributor make it run lean? I had to adjust it forward a little to the front bumper ( I think I retarded the timing?)

Eg.ls.turbo

And also I had my spark plugs gapped to .052 ngk (recommended gap) ran strong, then I closed the gap to .045 (ran not as strong as the bigger gap) and checked my plugs again and smelled some unburned gas. So then I open the gap up to .050 waitin to drive it and check on it.
Can spark plug gap cause it to run lean too?

I know the wider the gap it burns the fuel clean and the smaller the gap causes it not to burn all the way

delsolintegra

Try 93 octane

Have you tried adjusting your base idle?
Disconnect the IACV and adjust the idle screw on the intake manifold till you get a steady idle than rehook your IACV and pull the 7.5 amp fuse to reset your ECU. This smoothed out my idle on my LS/VTEC.

I have a B18 LS block, crank and rods.
YCP ITR pistons, ITR head and cams.
Skunk2 pro series intake.
ITR header and 3 inch exhaust.

I think my CR is 11.9 (not sure of my piston dome volume)
Your CR may be higher with the GSR head (not sure of your pistom dome volume also)

I run 93 octane. I have a P28 chipped by phearable and I haven't got to a dyno yet. I think you need 93 octane.

I'm on stock ITR plugs.

You might have to be careful with your piston to spark plug clearance when you choose plugs. A stroked GSR sounds close.

Eg.ls.turbo

Wow I thought my compression is only like around 11.0 to 11.3. I'm only using usdm type r piston 81mm with ls crank and rods.

U think my compression is in the 12.0?

My idling is steady and smooth I just hear putt every couple of seconds. I've adjusted my idle screw and had the iacv plug unplugged while adjusting it to 600rpm then plugged it back up but I never took the ecu fuse out.

Even though its idling smooth should I still do it?

I will try 93 octane gas but still got like a half tank left of the 89octane gas in my car. I also used some fuel system cleaner but still getting the putt sound.

Eg.ls.turbo

Also I'm using gsr one step cold on 6 plugs.

delsolintegra

Your GSR head volume is 41.6 cc

My ITR head volume is 42.7 cc

So your CR should be higher.

Go to zealautoworks.com and use their CR calculator.

I think your piston volume is 8.25.

Eg.ls.turbo

Wow 11.8!!! On zealautoworks calculator

I checked cspeed calculator and it comes up with 11.33

So which one is accurate? The machine shop had to shave the head good bit to get it flat and smooth but he doesn't know how much he took off.
I don't think I have a 11.8cp in my motor, I mean its strong when I'm giving it hell but it feels like a 11.0-11.3cp to me.

delsolintegra

Yeah I know it's not exact.
Look thru the all motor forum there might be some good info there.
I haven't seen any GSR stroker threads but I haven't searched everything.
It would be interesting to see our 2 cars dynoed side by side the same day.
I think the only difference is you have a GSR head and I have a Type R head.
I have type R cams and 240 cc injectors. What's yours?
I want to get a cutaway valve cover because with my LS/VTEC I need to get the cams degreed.
You might want to get a fuel pressure gauge and a adjustable fuel pressure regulator. With your higher CR you could tweak a little fuel pressure to avoid a lean condition.

I think for Brake Mean Effective Pressure for NA engines we have maximized the torque vs engine displacement. I have a chart of that somewhere I'll try to post it.

Eg.ls.turbo

Yea I tried searching every word with my setup but can't find nobody that has post up compression readings anywhere. Here there any way I can check how much compression I got instead of using a calculator?

Yes I have a fuel pressure gauge reads 43-45psi and ill look into a adjustable fuel regulator.
And I'm running low impedence accel 255cc injectors with resistors.

Yea that would b bad *** to see our setup dyno side by side can't wait to see the numbers on these setup.

And downgrading from a ls turbo to an na setup I thought it wouldn't pull as strong as the turbo setup... But this na setup is pretty badass. Fell in love with the vtec stroker lol

delsolintegra

I saw a thread at superhonda.com about a Integra GS-R Rebuild and the engine had 12.0 compression (that neighborhood) good read.