jcraig

Who are "they" and what are CR kits?

The S13 (89 - 94 240sx) is a grear car! I've owned 2 (91 and 93) and my brother drives one now (89). 91 had the best motor (better exh. cam). But, you won't find much on this forum. Here's the best forum on the planet for you right now; http://www.ziptied.com Search for whatever you need to know, the answers are all already there. Good luck and enjoy the ride!

How's that? Well, seeing that my brother lives in Tokyo (Yokota AFB), and looking at the S30's I saw when I visited, I think i'll listen to them before some redneck. Most simply would not beleive the the things (and cars) I saw there.

High Compression 3.0L - L28 Block +3mm Overbore - L28 Crank - L20A Rods (135mm) - 89mm KA24E Piston Flycut .6mm - 1mm Felpro/HKS Head Gasket - N42 Head 3.0L (2949cc), 10.73:1 Compression with N42/N47 Head (9.26:1 w/P90), .030 Deck Height. The long rods also gives better rod/stroke ratio. Or skip the Flycut and use a 2mm Head Gasket to get 10.29:1 compression with N42/47 head and .630 Deck Height ---------------------------------------------------- My idea with the L14 was as follows; High Compression, High RPM 2.8L - L28 Block +3mm Overbore - L24 Crank - KA24E Flat-top Pistons - L14 Rods - N42 Head - 1mm Felpro/HKS Head Gasket 2.8L (2751cc), 10.02:1 Compression with N42/47 Head (8.66:1 w/P90), .020 Deck Height. Nice high reving motor and much better rod/storke ratio.

*edited with new request.

Looks very nice! What size wheels (dia. & width) and tires?

bah, sell that sucker to someone who needs it for a restore and who will pay $$$ for it. Focus on go fast parts! That's just me though. BTW, do you have a full size image of your avatar? I like that drawing! Kinda what I want to do.

I am trying to locate a set of 6 L20a or L14 rods. Yes, I have searched this forum as well as the internet. Does anyone have the Part #'s? In what engine/car were these rods availble? Are they available in the US? Can I order them from Nissan or get new OEM's anywhere?

Ah, ok. In that case, I'm getting 9.43:1

google.com? :lick: I didn't find that one. I usually use this; http://www.csgnetwork.com/compcalc.html I was asking because I wanted to know the exact one he was using since I came up with different results.

According the information I've found, and your given setup this is what I get; Bore: 87.5mm (Z22S + .5) Stroke: 83mm (LD28) Piston Dome/Dish: -9.33cc (Dished) Head Gasket Height: 1.25mm (Stock?) Head Gasket Bore: 88mm (Stock?) Combustion Chamber Volume: 53.6cc (P90) Piston/Deck Clearance: -1.02mm (below deck) Compression Ratio = 7.5:1 Displacement = 2993cc (~3.0L) This is assuming you are using a stock head gasket. If the stock head gasket compresses some (~1.125) you may get about 8.5:1 compression. This is also assuming that the Z22S pistons are actually 87.5mm diameter. A +1 Z22S piston is 88mm. So, I guess you have a +.5? A +1 would give you; Compression Ratio = 8.57:1 Displacement = 3028cc (~3.0L) To get more cmopression, you may want to use the N42 Head which will give you a 8.42:1 compression ratio. Again, this is all assuming the aboce calculation are correct. The only combination I see to acheive 9.4:1 compression is; Piston: KA24E +1 (90mm!!!) Crank: LD28 (83mm) Rods: L24 (133mm) Piston/Deck: -1.37mm (below deck) Head: N42, N47 Gasket: HKS 1mm Heigh x 91mm bore

Where can I find this? Also, I would still like to know the pin height of the piston LZ22 if anyone knows. This would tell me the installed piston height (piston/deck ratio). So, you used the diesel crank (LD28) and stock rods? And the pistons were .5mm over bore (87.5mm)? I'm trying to figure your final displacement.

Do you know the pin height of this piston?

Wow great link! Thanks a bunch!

That's good to know as I did not know this. Again, my experience with carburetors is pretty limited. I've mostly been working with FI cars. That's also good to know. I would like to check out some Nissan race motors to see what they are running. Although information is pretty limited from what I can find. Despite the 'numbers' the calculator shows, it looks like any given motor is running around 40mm per 500cc; Motorcyles and cars alike. Harley's are a good example as well as some Suzuki's and Older V-Twins. So, for a slightly hotter L28, 38mm or 40mm Mik's would suffice. With a cam, head work, and header, 40's or 44mm indi's would work. Can anyone point me to some info on the differences between SU's and DCOE's and how they work? I'm still not entirely knowlegable of the differences in round slide, flat slide, su, dcoe, tmx, etc., etc... I'm getting more and more interested in this old-school tunning approach. - John Craig