A CNC head is only as good as the hand ported head it was modeled after. Do you know if this shop has any flow numbers for the before and after CNC porting? If it is a nice port job I bet they could sell a few outside of Qatar if they opted to.
1FZE Naturally Aspirated Upgrade (CLOSED) (2 Viewers)
- Thread starter ToyotaIsLife
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Ocho77
SILVER Star
Man, I am currently in Qatar and I've taken so many pictures of cruisers. Would love to pack up parts and throw one of these in my 60...
- Thread starter
- #143
Yes, I understand, a CNC only has an advantage when it comes to consistency. However, there must be a reason it's not hitting or going over the 300whp mark. An equivalent build got 310whp with the same parts. Another build with just a cam and a motec ecu hit 250whp which is just 20 shy of where my build was at before the recent cam swap, somethings not right. Compression is perfect so it must be an airflow problem which is why we decided to give CNC a try as a last resort. Wel see if it did any good or not.
Unfortunately, they don't have head flow benches so we can't measure the change or the current flow.
- Thread starter
- #144
Something very strange happened,
My engine was swapped over to another LC100 and it got 325 whp on the same dyno while mine still is 270whp open headers , 255-260whp muffler connected.
55-60 whp difference just by swapping the engine to another frame? How is that even possible I have never seen anything like this.
Drivetrain loss is the only contributing factor I can think off however I can’t imagine it being this significant.
the only difference between my rig and his rig is the wheel, we are both using the same tire, he uses an alloy Toyota 16 inch wheel while I am using a steel Toyota wheel. Unsprung weight is heavier on my rig but not enough to justify that much of a difference.
Atleast we now know the issue is not with the engines power output, it’s something else whatever it is.
Garage owner told me they started inspecting drivetrain components
My engine was swapped over to another LC100 and it got 325 whp on the same dyno while mine still is 270whp open headers , 255-260whp muffler connected.
55-60 whp difference just by swapping the engine to another frame? How is that even possible I have never seen anything like this.
Drivetrain loss is the only contributing factor I can think off however I can’t imagine it being this significant.
the only difference between my rig and his rig is the wheel, we are both using the same tire, he uses an alloy Toyota 16 inch wheel while I am using a steel Toyota wheel. Unsprung weight is heavier on my rig but not enough to justify that much of a difference.
Atleast we now know the issue is not with the engines power output, it’s something else whatever it is.
Garage owner told me they started inspecting drivetrain components
Hmm wonder if you have rear brakes dragging ..but of course you should smell that.
AussieHJCruza
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There is a reasonable loss in a cruiser driveline, I measured about 40% on my HDJ80, H151, 4.11 diff, 285/75/16 tyres, CDL locked, front driveshaft pulled
Were both ran in the same configuration of AWD or RWD? Not sure if you are doing the standard op of removing the front driveshaft and locking the center diff, making you effectively RWD, or you are running it as a true AWD. Just grasping at straws here, I'm quite sure a shop that knows what they are doing would understand the difference.
- Thread starter
- #148
It's a part-time 4WD transfer case that 1998-2005 LC100s get, 2WD, with a press of a button you get 4WD. All tests are done on 2WD.
ppc
M Go Blue
Were both runs made in the same gear?
That is very hard to believe. Both trucks are using the same transmissions? Same gear boxes? Same rear axles? The only difference is wheels? If so there is no way wheels account for a 65whp difference. Maybe 8-10whp. Are they using the same intake? Something smells really fishy to me.
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- #152
Everything is the same except the wheels and the ride height.
Both trucks are manual, BUT they are not the same transmissions.
Both use OEM rear axels however they are different. They did not swap any of the drivetrain parts, just the engine, flywheel, and clutch.
Tachycardic
SILVER Star
You say that everything is the same, but the axles and transmissions are different--it has to be something after the engine that's sucking up all that energy, unless you're using 2 different dynos and the calibration is off. How are the transmissions and axles different?
- Thread starter
- #154
Yes must be something after the engine.
We are using the same dyno.
When I meant to say was both rigs use all OEM drivetrain components however we did not exchange parts just the engine.
so it must be that one or more of my drivetrain components are worn out or are not functioning properly there can’t be another explanation or at-least one that I can think of.
Nevertheless I will be taking it out of the garage tommorow to see how it drives and use it at the dunes this weekend hopefully better than the first try.
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- #155
Engines back on my rig and thee final tune set ! Picked it up and on my way to the dunes for the test. I’ll be at the dunes testing it for two days.
Right now it’s at 290whp fluctuates a little below and above that number also added a ON OFF switch for the backfire, we also removed the electronic muffler and added a straight through standard muffler to avoid valves being stuck
Videos of it running in an hour or two when I get there.
Right now it’s at 290whp fluctuates a little below and above that number also added a ON OFF switch for the backfire, we also removed the electronic muffler and added a straight through standard muffler to avoid valves being stuck
Videos of it running in an hour or two when I get there.
- Thread starter
- #156
First start up and rev at the dunes.
night time to dark to shoot outside footage of dune bashing unfortunately I’ll leave that for tommorow.
So far first impressions, the low end power is suprisingly good it does not bog down at all when full throttle at a tall gear around the dunes, mid to top end is okay not amazing.
night time to dark to shoot outside footage of dune bashing unfortunately I’ll leave that for tommorow.
So far first impressions, the low end power is suprisingly good it does not bog down at all when full throttle at a tall gear around the dunes, mid to top end is okay not amazing.
- Thread starter
- #157
First dune bash test !
- Thread starter
- #158
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Tachycardic
SILVER Star
It looks like terrific fun! What tires and tire pressures are you running?
- Thread starter
- #160
Yes tons of fun, just need to slap some king shocks and TC UCAS and it will be good to go. I slapped the bump stops to many times this weekend, however cruising around its comfy.
Tire pressure: 15 PSI.
Tire: We call them Ballons they are from Maxxis, They are a extremely popular here in Qatar, they are made of nylon only which makes them very light, and plush + it does not dig in sand. However it punctures easily and vibrates on road.
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