Greaser2 Posted January 19, 2020 Author Report Share Posted January 19, 2020 4 minutes ago, d.p said: Is AC parasitic on l16s? Not sure but will be going L20B. 1 Quote Link to comment
Crashtd420 Posted January 20, 2020 Report Share Posted January 20, 2020 25 minutes ago, d.p said: Is AC parasitic on l16s? Do you mean when your not using it? When not activated it's just a free spinning pulley on the compressor.. When you activate the ac and the clutch on the compressor engages you definitely know it.... my motor drops maybe 200 rpm ... you will notice it at idle if you dont compensate for it but I dont feel anything different while driving.... 1 Quote Link to comment
d.p Posted January 20, 2020 Report Share Posted January 20, 2020 16 hours ago, Crashtd420 said: Do you mean when your not using it? When not activated it's just a free spinning pulley on the compressor.. When you activate the ac and the clutch on the compressor engages you definitely know it.... my motor drops maybe 200 rpm ... you will notice it at idle if you dont compensate for it but I dont feel anything different while driving.... Yeah that's what I was asking. 1 Quote Link to comment
Charlie69 Posted January 20, 2020 Report Share Posted January 20, 2020 (edited) I see the best tech there is on the timing. Edited January 20, 2020 by Charlie69 1 Quote Link to comment
Crashtd420 Posted January 20, 2020 Report Share Posted January 20, 2020 2 minutes ago, Charlie69 said: I see the best tech there is on the timing. I think you confused your post.... That's from the 520 area not greaser2.. 1 Quote Link to comment
Charlie69 Posted January 20, 2020 Report Share Posted January 20, 2020 You are correct to many windows open, I do apologize. 1 Quote Link to comment
Greaser2 Posted February 2, 2020 Author Report Share Posted February 2, 2020 My exhaust is 1.5inch pipe. Is this size, to small or ok as is? Quote Link to comment
datzenmike Posted February 2, 2020 Report Share Posted February 2, 2020 It's fine for an L16. The engine is 'tuned' to run with it that size. If you go too much larger (like a ridiculous 2 .5 or 3") on a stock engine you can alter the savaging effect by lowering exhaust speed. This usually robs a little of the the mid-range torque and power but can benefit high RPMs. If you are looking at replacing the pipes anyway keep it in the 20%-33% increase range unless intending to swap in a larger displacement engine or power adders like a cam and multiple carbs. Keep in mind that a doubling in diameter of a pipe increases the flow by 4 times, not double. Going to a 2 1/8" pipe is double a 1 1/2" pipe. You'll never need that much flow. Going from 1.5" to 1.625 (1 5/8") is a 17% increase. A 1.75 (3/4") is 77% more than enough 2 Quote Link to comment
Greaser2 Posted February 2, 2020 Author Report Share Posted February 2, 2020 (edited) 7 hours ago, datzenmike said: It's fine for an L16. The engine is 'tuned' to run with it that size. If you go too much larger (like a ridiculous 2 .5 or 3") on a stock engine you can alter the savaging effect by lowering exhaust speed. This usually robs a little of the the mid-range torque and power but can benefit high RPMs. If you are looking at replacing the pipes anyway keep it in the 20%-33% increase range unless intending to swap in a larger displacement engine or power adders like a cam and multiple carbs. Keep in mind that a doubling in diameter of a pipe increases the flow by 4 times, not double. Going to a 2 1/8" pipe is double a 1 1/2" pipe. You'll never need that much flow. Going from 1.5" to 1.625 (1 5/8") is a 17% increase. A 1.75 (3/4") is 77% more than enough I will be going with a L20B. Is the 1.5 ok or should I go with a 1 7/8 or 2 inch? Edited February 2, 2020 by Greaser2 Edit 2 Quote Link to comment
gene knight Posted February 2, 2020 Report Share Posted February 2, 2020 I'm running a rebuilt L18 with 9.5 to 1 compression ratio and a U67 head with a weber 32/36 carb and a cannon intake /stock exhaust manifold and running 2" exhaust pipe and baffled monza tips and a small rectangular muffler instead of the flow master muffler i used when i took my 521 to fontana bbq about 6 years ago. and i have no torque/power drain 1 Quote Link to comment
Stoffregen Motorsports Posted February 2, 2020 Report Share Posted February 2, 2020 2" pipe is great for all around driving. Works well with factory manifold and carb. 2.5" pipe is to be used with a "good" header, collector, muffler, modified DGV or dual carbs, etc. 2 Quote Link to comment
datzenmike Posted February 2, 2020 Report Share Posted February 2, 2020 8 hours ago, Greaser2 said: I will be going with a L20B. Is the 1.5 ok or should I go with a 1 7/8 or 2 inch? I think the L20B engines in the 620 used 1 3/4" or 1 7/8" so 2" would work very well. Keep your L16 'cast iron header'. It's a 4 into 2 design separating the 1 and 4 from the 3 and 2 firing cylinders with a twin down pipe merging into one. All L20Bs use a 4 into 1 manifold... Below... L20B single outlet (bottom and L16/18 dual outlet pipes. On my L20B I got rid of the 4 into 1 exhaust and fitted an earlier L16 manifold and a modified 240sx twin down pipe... 2 Quote Link to comment
Greaser2 Posted February 7, 2020 Author Report Share Posted February 7, 2020 So I figure everyone has or had this problem so I wanted to post this brake cable boot I found that fits very well. My plastic slide grommet was still on the cable so that fit at the bottom great. This is a 60-93 Dodge truck brake cable boot. Cost about $35 and super easy to install 4 Quote Link to comment
greenthumb Posted February 7, 2020 Report Share Posted February 7, 2020 Well that’s cool. When did they switch from the mechanical bellcrank system? My 70 still had the bellcrank. I did away with all that and used a 510 cable to gain clearance for my KA. Looks like I maybe could have used a truck cable too 1 Quote Link to comment
greenthumb Posted February 7, 2020 Report Share Posted February 7, 2020 Or maybe I’m just misremembering 🙄 Maybe my truck was cable to the bellcrank. It’s been a while. At any rate the bellcrank fouled on the exhaust so it had to go 1 Quote Link to comment
d.p Posted February 8, 2020 Report Share Posted February 8, 2020 How the hell do you find this stuff that fits? 2 Quote Link to comment
Greaser2 Posted February 18, 2020 Author Report Share Posted February 18, 2020 What does this thing do exactly. I’m guessing emissions and yes I cut it off the exhaust manifold. What a pain getting all the nuts of. 1 Quote Link to comment
thisismatt Posted February 18, 2020 Report Share Posted February 18, 2020 If EGR it let's hot exhaust back into the intake to lower NOx 1 Quote Link to comment
d.p Posted February 18, 2020 Report Share Posted February 18, 2020 Throw it in the garbage. 1 Quote Link to comment
mainer311 Posted February 19, 2020 Report Share Posted February 19, 2020 (edited) M14 oil drain plugs fit perfectly in those locations. I used aluminum crush washers to make sure they were “sealed” up. Edited February 19, 2020 by mainer311 2 Quote Link to comment
Greaser2 Posted February 19, 2020 Author Report Share Posted February 19, 2020 11 minutes ago, mainer311 said: M14 oil drain plugs fit perfectly in those locations. I used aluminum crush washers to make sure they were “sealed” up. Cool. I got some M14 1.5 plugs ordered. Did u clean the rust before the paint? 1 Quote Link to comment
mainer311 Posted February 19, 2020 Report Share Posted February 19, 2020 I mean, kinda. I scrubbed it with a brush while spraying it with carb cleaner. 2 Quote Link to comment
thisismatt Posted February 19, 2020 Report Share Posted February 19, 2020 Soak it in this for a few hours/overnight: https://www.homedepot.com/p/Klean-Strip-1-gal-Concrete-Etch-Metal-Prep-Rust-Inhibitor-GKPA30220/100406369 1 Quote Link to comment
mainer311 Posted February 19, 2020 Report Share Posted February 19, 2020 I recently bought a jug of Evapo Rust to restore some original jack parts from my Datsun Roadster, and I wasn’t super impressed. It took a long time for it to do anything. 2 Quote Link to comment
thisismatt Posted February 19, 2020 Report Share Posted February 19, 2020 The etcher I mentioned is primarily phosphoric acid, and it'll start working pretty quick, even diluted with water. You will see bubbling/fizz 🙂 2 Quote Link to comment
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