looking forward to driving videos also !
Adding SC to my 99 GCC build thread
- Thread starter Wadepat2
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- Thread starter
- #42
Short clip from 3-4k with window down.
SC screams but exhaust out tailpipe sounds stock. Engine \ headers is noticeable just no rumble haha. At 4k and 6-7 psi this is what it sounds like. From 4k to 5600 and 8 psi tone changes and yes it gets louder. Little much with no exhaust but I like it
- Thread starter
- #43
Hopefully last time on the dyno. 100F degrees ambient ,IAT temps crazy high but no knock and she stayed together just fine haha
Made 330hp to the wheels and 367 tqe. Not bad from starting at 200 whp. Overall Im happy with is. Cost way to much and I am happy to be done with engine performance mods. Will upgrade valve boy in Trans and new brake pads are next. Other than that not much planned. Thanks for following along with my build. I learned a ton, took some tuning classes so I can tune it on road myself , it sounds good, and drives more like a new model with plenty of power and overall this was a great project.
Incase anyone is wondering, Would I do it again to my mint stock Land Cruiser. The answer is definitely NOT but once I started , I went all in.
Made 330hp to the wheels and 367 tqe. Not bad from starting at 200 whp. Overall Im happy with is. Cost way to much and I am happy to be done with engine performance mods. Will upgrade valve boy in Trans and new brake pads are next. Other than that not much planned. Thanks for following along with my build. I learned a ton, took some tuning classes so I can tune it on road myself , it sounds good, and drives more like a new model with plenty of power and overall this was a great project.
Incase anyone is wondering, Would I do it again to my mint stock Land Cruiser. The answer is definitely NOT but once I started , I went all in.
Wow those are some really impressive numbers. I thought the stock SC was only good for about 120hp more. Do you think it is more the headers or tuning that got you the extra power?
- Thread starter
- #46
Super charger probably added 120hp at the crank. So something like 245hp to 365hp at crank. I think those number on a stock LC with only adding TRD SC kit is a little optimistic but not crazy.
For mine - I went from ~200 hp at wheels stock to 235whp with just Supercharger. I had a huge bottle neck in GCC spec intake tubing at top of air cleaner. SC couldnt get over 4 psi. I added 3" intake tube with one 90 bend and Boost went up to 6-7 psi and it made 303whp. This would be about the 120hp numbers that get thrown around but no way it would do that through my stock intake. I think the US spec intake and filter would be better or maybe it went with a TRD one back then?
After it made 303whp I added long tune headers but kept stock muffler. I also added an overdrive pulley to gain a little boost that was lost form headers. Its not about7-8 psi and made 330whp pretty easy on a crazy hot day with intake temps off the chart. I may put it on dyno again when its cool just to see. Then take it to 5700 rpm and let it add a little timing back with lower temps. I am confident it would make 350 to wheels. Crank would be estimated about 400-425.
sorry for the long post. haha. But to answer your question the intake had the most to do with the numbers then crank pulley then headers if I had to look at each thing separately. Tuning was just what had to be done to keep the fuel there for the extra horses. I dont think tuning only would help any stock LC. OEM tune was pretty solid and reliable on mine. For the few horses tuning might get I would touch the stock tune.
This was exactly what I was wondering. Thanks for detail. I have often wondered if there are easy to gain HP with my SC. I will look into the intake. I show a peak of about 4.5 PSI on my SC at about 5000 ft in elevation.
If you ever go back for Dyno try to unbolt the stock muffler and do a run without it and see how much power you lose with the stock muffler.
- Thread starter
- #49
If I had US spec I would go with Volant. Custom metal one like mine sucks for heatsoak
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- #50
I may go with little more open exhaust but will try that if I put it back on dyno. Would be good to see if it's limiting the headers
I'd speculate 10 whp without muffler.
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- #52
Had intake finished and swapped oem muffler for 3" inlet one kept rear tail pipe and resonator. Supercharger spools faster now. Guess it helped the long tube headers do what they should. Big oem muffler was silent and now I have a little sound . Now back to tuning and don't mind the rich revs . Shop didn't let it warm up first so still on startup fueling. Hopefully will I see a little more HP/TQ and lowered boost psi.
. Shop didn't let it warm up first so still on startup fueling. Hopefully will I see a little more HP/TQ and lowered boost psi.- Thread starter
- #53
Lost about 1psi of boost and about 10c of heat lower on a 3rd gear pull so the stock muffler was still very restrictive even with long tube headers and 3" down pipes. Should make few more HP once I get street tuning lined out and get it back on dyno.
Have you seen this adapter? It allows you to bolt on a much larger throttle body from the newer Lexus cars. I wonder if it would be worth it on your truck: URD Throttle Body Adapter, 76 to RCF 2UZ-FE 4.7L V8 - Underdog Racing Development - https://urdusa.com/urd-throttle-body-adapter-76-rcf-2uz-fe-4-7l-v8/
- Thread starter
- #55
Looks good but so far the only thing I have left using oem ecu is throttle and trans. Transmission should be swapped to 5 speed soon but throttle works so well at idle I'm scared to even touch it. Haha
I think the larger Lexus throttle body is plug and play. It has the same plug and should adjust to idle. The throttle body is significantly larger from 76mm to 84mm. I just read that it only works on 2005+ truck though.
Drool. How's it pull through the gears now?
- Thread starter
- #59
Pretty smooth. 5th isn't great but I knew that going in. I'm also on stock tires. Still have some fine adjusting to do and have to check my tuning through the shifts.
Haven't tried it with supercharger yet. It's disconnected since I had to pull a bunch of wiring and methanol lines from the convient hole I drilled in the same spot clutch goes. Haha.
Should be able to see how it pulls next week.
Will get some videos once it's done. Can't lie , would love to have built auto especially for the desert but the cost was alot more with shipping and with my ecu it could have still gave issues.
Even got a manual gauge cluster cover now
GTV
SILVER Star
Wicked cool!
Is the final drive ratio the same in auto vs manual trans 100’s?
Is the final drive ratio the same in auto vs manual trans 100’s?
