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1Gen-TundraGeneral discussion forum for the 2000 to 2006 Toyota Tundra.
This is a discussion thread titled "High Altitude, Short Power, S/C V8 ?", within the 1Gen-Tundra forum, part of the Truck Forums category.
I just finished getting the boost guage installed,took it and did a few short test at varied speeds did not notice any spiking on the guage but never went over 5 1/4 even getting full punch.Alt. here is 5400-7500 is my v8 running that much shorter on power due to elevation?Is the guage misleading?Where to get the power safetly?Seems like I should be able to handle at least 3 more # without causing problems!
I just finished getting the boost guage installed,took it and did a few short test at varied speeds did not notice any spiking on the guage but never went over 5 1/4 even getting full punch.Alt. here is 5400-7500 is my v8 running that much shorter on power due to elevation?Is the guage misleading?Where to get the power safetly?Seems like I should be able to handle at least 3 more # without causing problems!
Not sure if your low boost is due to high elevation but I can tell you that elevation makes a huge difference in performance.
I used to have a 5.0 Mustang GT and I drove it to Northern Mexico where the alt is 7000ft and it felt gutless compared to what it did at sea level.
Also I took my Tundra to the drag strip at near sea level and 10 deg celcius and ran 14.9@92mph with no mods.
I lived at 8,700 feet in northern New Mexico for 3 1/2 years, with a short period at 10,300 feet. The engines of my Tundra and Sequoia were silky smooth at that altitude but the power loss was noticeable. They still had plenty, though.
Can't say I'm disappointed,the truck seems to run very well have never driven one from the lowland to see how much its missing.My main concern was the spiking issues'which it dosn't appear to be any unless there is something other than stomping on it to do?My thought is I could do the oversized pully and pick up some that is lost without problems(TRANS).More bang for the bucks and go from there.ANY IMPUTS?
Next week I should have my gauge on to test this theory also. I thought that mine would put out more power too. I do have a Unichip to be reprogramed. I'm kinda waivering on this or to just sell it(Unichip) outright. I have had mine at sea level back home in Cali, it performed much better even without the s/c. When my gauge is installed i'll let you know what mine is putting out.
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TRD Supercharger
ASP od pulley
Supra TT Fuel Pump
Hellwig Antisway-bar
Magnaflow Single Exit Exhaust
SS Autochrome Shorties w/JetHot 2000
Cornbred 2 1/2" coil spacers w/1" aal's in rear
Rear seat mod
LEER Cap w/limo tint
"Rusty"Rhino Brush Gaurd
SOLD 96' FZJ80 Series Landcruiser
Newest edition of German decent...
04' Porsche Cayenne S
I just finished getting the boost guage installed,took it and did a few short test at varied speeds did not notice any spiking on the guage but never went over 5 1/4 even getting full punch.Alt. here is 5400-7500 is my v8 running that much shorter on power due to elevation?Is the guage misleading?Where to get the power safetly?Seems like I should be able to handle at least 3 more # without causing problems!
Most ppl with a s/c don't nessesarily get 7# boost,especially at your altitude. Mine did for about a week or two, then the ecu reeled it in a bit. I think there may be a hint of knock that the sensors detect, thus lowering the boost. You can get the overboost pulley that fits on the crank and with that setup should give you 8-9#. The overboost crank pulley is not a TRD unit. It's custom made from an existing crank pulley, so it retains the dampner .
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Unichip'd TRD Supercharger & 5.9 Overboost Crank Pulley,TRD Boost guage and Oak color matched pod,TRD LSD,Valvebody Upgrade by IPT in NY, JBA headers,Y pipe, K&N(Evol) SS catback exhaust, Helwig Rear antisway bar, Rear custom Leafpack,TRD Coils,Cornfed Spacers's with Y/B Bilsteins,Westin Outdoorsman Bushbar and Nerf Tubes, TRD Ivan Stewart 16X8 Rims and 285/75/R16 Revo AT tires.Pioneer 5500 MP3 Head unit/Q-Logic sub enclosure with dual crossfire subs/ 700 watts of Crossfire Amps/Bazooka 6.5's and 5.25's in Kickpanels/ CodeAlarm Remote starter/antitheft system.
That is kinda my thought I should be able to get the pully redone and still be safe,pick up some at the low end,maybe get the boost up to 7-8,don't really want to do the valve body thing but I don't think I should need it if the boost doesn't go crazy on me.Correct me if I'm wrong!Just seems to be some HP going to waste.Unless the alt. thing is misleading me.
I'am in Nashville and my boost gauge at full throttle will reach 6 7/8 lbs. I do have Dual flow master Delta Series 50 exhaust with JBA Titaium Headers. Did the IPT Trans Valve Body also. My 2003 Tundra runs Very Strong! Could there possibly be a leak in the system?
Waiting to hear from MNONO and AC along the front range here to see what their boost is showing.I think I would have gotten an CEL if mine is even working right I had alot of trouble with it when I first had it s/c installed not so much anymore.
My Stage III VW Corrado G60 would put out 18psi in Phoenix but only about 11-12psi going over Wolfcreek pass with an eye on the pyro gauge ... so low boost at that level would be normal my guess... Like the outhers said Underdrive pully to help some........AZ
I agree the power difference is altitude related. I'm getting max 5.5 PSI boost. I'm investigating the overboost pulley and methanol/H2O injection. I'm running the S/C with the Unichip and no other engine mods.
Yes, that would seem to be the case. 5.5lbs at max here. hmmm. I don't have my Unichip on right now, but maybe it's time to send it back to Jack and have it reprogrammed and new harness. ASP says 200 buh, for the pulley. I guess with a Dawes set at about 8.5 at most, it should be safe??? Maybe I can stop there. Ah, who am I kidding. In June they have the urban truck races at Bandimere, maybe some guys should get together and test there trucks. Might have to look into gearing also.
__________________
TRD Supercharger
ASP od pulley
Supra TT Fuel Pump
Hellwig Antisway-bar
Magnaflow Single Exit Exhaust
SS Autochrome Shorties w/JetHot 2000
Cornbred 2 1/2" coil spacers w/1" aal's in rear
Rear seat mod
LEER Cap w/limo tint
"Rusty"Rhino Brush Gaurd
SOLD 96' FZJ80 Series Landcruiser
Newest edition of German decent...
04' Porsche Cayenne S
Thanks for the feedback!I think maybe I'll work on the 5.9 pulley.I'm guessing with most getting 3psi increase I might pull 2+ should put me at about 7-8 tops.From what I hear I think the rest of the truck should hold together without any problems + get some of the low end back.Hopefully wont be any a/f issues.The Lexus guys seem to have a handle on that I assume the 99-04 are much the same except the TRD ecu don't know much about the dawes a little blank upstairs when they talk about that.
The thing at bandimier sounds cool keep me informed maybe we can turn it into a northwest tundra rally.MNONO carefull with your build can't say I've spotted you yet still looking.
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High Altitude, Short Power, S/C V8 ?
hmmm. I don't have my Unichip on right now, but maybe it's time to send it back to Jack and have it reprogrammed and new harness. ASP says 200 buh, for the pulley. I guess with a Dawes set at about 8.5 at most, it should be safe??? Maybe I can stop there.
Ah, who am I kidding. In June they have the urban truck races at Bandimere, maybe some guys should get together and test there trucks. Might have to look into gearing also.
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