Camshaft options for the 4e Toyota engine + valve spring options.

Sam44

Member +
As per the title. What available and what's needed to run these options in the 4e engine + bucket and valve spring options.
Thanks as always for your advice and knowledge.
 

SKINY

Lifer
What about FTE cams Sam, or are you thinking past that :)
Only experience I have with swapping cams is many many moons ago on Vauxhall stuff, my recent history with Vauxhall cams is chequered, who knew a corsa would run 2 miles on 1.5 cams :cool:
Piper and Kent cams spring to mind, tuning developments etc maybe have something
 

Sam44

Member +
Yeh mate. I've been told bits of things like Yaris cam bucket type solid followers, and VW polo 6n2 valve springs but nothing definitive, I'm running stronger valve springs on 4efe cams which I'll explain alittle about now.

Any and all part number, and makes and models will be very much appreciated.


The 4efe cams have very little over lap if any this is in the ep91 UK starlet
Peak cylinder head flow is from 3000 to 4000rpm
This graph bellow is off the UK ep91 running the Corolla tubular inlet
Note how the hp, and torque graphs follow the same rpm peaks and dips but what looks alittle dip in hp is a big dip/drop in torque. Torque is the pull you feel in the car. Hp is how fast the rpm builds.
There are a few things main things that affect the graph including errors such as wheel slip on the rollers.
These are cylinder head gas flow rates and fueling.
The first thing I look at is cam profiles, this tells me where in the rpm the peak torque will happen. (Normally happening over a table top 2000rpm some were in the rpm range.
Low rpm Air velocity affects the up ramp towards peak torque ultimately desiding the figure of the peak.
This is were inlet manifold and throttle aplication/throttle size come into it.
In the above graph we see this setup starts at around 95ftlds of torque then very quickly hits 100ftlds but at 2750rpm takes a sudden drop this in a nut shell is the corrolla inlet in action because of the large throttle size and fueling mismatch (not mapped in) the hp Dips and torque drops off till around 3200rpm were things start to recover and 4000 to 4250rpm were we know are hitting peak head flow/peak torque taylored by the cam profile characteristics.
After this peak flow/torque point it's down to the inlet and exhaust to one not restrict the head flow (back pressure) and two inlet not to restrict the head flow by suppling anuff air volume. On the graph note how sharply the torque drops off but yet the hp still raises. this is were mph starts to struggle to build but the rpm still goes up nice. At this drop off point the more hp you can deliver the shallower/flatter the loss in torque. If you can get it to table top till the rpm limit is reached then you will have a constant build of mph (pull feel).4efe corrola inlet ep91 uk.jpg
 
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Sam44

Member +
4efe ep80 gi.jpg
The ep80 gi graph using a higher volume (bigger) flowing inlet (4efte/gen1), and exhaust system plus I suspect the turbo slightly higher lift inlet cam leading to greater cylinder ve (volumetric efficiency) and cam overlap.

Note the starting torque point and how long in the rpm it takes to hit 100ftlds of torque also the difference is torque output figures (which is the fastest mph setup), note the big dip in the lower build of power in the rpm at the same point (this is the fuel pressure regulator rise in fuel pressure).
Now the peak torque is harder to pinpoint but found to be around 5000rpm a full 1000rpm more valve overlap (cam profiles). Also a slower drop off in torque.
4efe gi fueling.jpg
The fueling graph you can see the fpr hit of fuel at low rpm and how it kills power. (This is were I use a vacume chamber in the vacume line on the fpr to smoothen the pressure increase off and spread it over a greater rpm range with obvious fueling improvements in the lowwer rpm band).
You can see the fueling recovery 2x peaks on the power graph
Also the wot conditions at peak hp, set alittle to rich for safety leveling off the hp build but slowing the torque drop off
IMG_20200615_152930.jpg
 
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Sam44

Member +
4efte tdo4l hybrid.jpg
A very well mapped, smooth 4efte ep91 glanza v running a tdo4l hyb.
All the turbo will do is amplify the already set engine power levels at set points, (boost) also top end heat and back pressures. Here you can see the boost/power build followed by head peak flow and flow drop off now is sharper than the gi setup because of the turbo exhaust back pressures and heat but amplifyed figures.
 
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SKINY

Lifer
I noticed an improvement in the midrange after fitting the rolla manifold and body, I've a graph here tucked away from the dyno
 

Sam44

Member +
I noticed an improvement in the midrange after fitting the rolla manifold and body, I've a graph here tucked away from the dyno
Get it up. This flow improvement will affect the turbos ability to spool up (bigger turbo), and can be either a combination of inlet exhaust manifold designs or cam profile.
Ultimately then the question is were (power and) you will be driving the vehicle. Road tune will be more from base to around 4500rpm and track/strip 5000rpm to peak. You then tune in relation to your target rpm range. I'm looking for the paseo and Sera 5efe and 5ehfe graphs giving away there cam profiles.
 

Sam44

Member +
If anybody is running a different cam set ie 5ehfe or speed vision or adjusted modified 4efe/4efte then please post them up even different turbos to see the torque graph affects using big and small turbos.5efedis_dyno_1.jpgunnamed (3).jpg
 
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SKINY

Lifer
20200620_085241.jpg20200620_085308.jpg
There you are Sam :) GT at the top, notice the slight misfire after 3k, that was a bad king lead, cap, arm :)
The Rep really did pull very well for what it was as you can see :) I ran it with the tps unplugged so it had a tad off extra fuel, popped and banged just like a glanza lmfao
Took a few scalps on the drag strip too, mx5, scooby 1.6 and and I mullered a tyre r accord that the fella held on the limiter too long in 1st allowing me to slip past :)
There where a few very upset folk asking me to open the bonnet lmfao
 

SKINY

Lifer
The afr was monitored on the Rep too on the dyno and he told me it was "very good" :) no print outs for it tho
Won 2 trophies them 2 days too.........
 

Jay

Admin
Lets see, there's 4EFE cams, 4EFTE cams, 5EFE cams, 5EFHE cams, Speedvision cams, Crower Racing cams, Ivan Tighe cams, Cruise cams, HKS cams, I think Piper offered cams too so there's plenty of choice. If you know what you need you could get them made to suit.

3 of my 4 are running stock 4EFTE cams. The fourth is a Japanese built 5E which was advertised containing 5EFHE cams (would need inspected to be certain as jap description sheets aren't 100% accurate). The 5E has bags of torque from low RPM, makes it very useable off-boost, how much of that is cam related and how much is displacement are debatable.

I've also got a set of 5EFHE cams and ACIS intake sitting on the shelf here. Saving it for if I ever go silly in the head.
 

Sam44

Member +

These are talking a 45hp increase with there cams installed on a set tune.
 

Sam44

Member +
Lets see, there's 4EFE cams, 4EFTE cams, 5EFE cams, 5EFHE cams, Speedvision cams, Crower Racing cams, Ivan Tighe cams, Cruise cams, HKS cams, I think Piper offered cams too so there's plenty of choice. If you know what you need you could get them made to suit.

3 of my 4 are running stock 4EFTE cams. The fourth is a Japanese built 5E which was advertised containing 5EFHE cams (would need inspected to be certain as jap description sheets aren't 100% accurate). The 5E has bags of torque from low RPM, makes it very useable off-boost, how much of that is cam related and how much is displacement are debatable.

I've also got a set of 5EFHE cams and ACIS intake sitting on the shelf here. Saving it for if I ever go silly in the head.
Thanks jay I knew you or skinny would hit the nail on this 1.
Yeh the 5ehfe cams not only have increased lift but also duration and what I've read requires the acis inlet or a correctly placed small to medium sized turbo to be able to provide any hp gains.
 

Sam44

Member +
Again skinny thanks for the reply with the Dyno graph I'm just looking at it now. Very smooth graphs on both and the na graph (nice tune) you can see the corolla inlet table top low to mid torque graph really very outstanding and also the difference between the 4efte cam configuration and 4efe 1000rpm difference uptop. Now we think what would the graph look like with the turbo cam set in and enlarged plenium chamber on the manifold even a twin plate throttle, and obx huge exhaust.
 
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Sam44

Member +
unnamed (3).jpg
The thing I notice here is how the power is delivered in 1 continuous go.
Look how the torque graph build almost mirrors the hp build. The in car feel would be awesome 1to1 power great control great acceleration. It's normally around 1.5ltr to 1.6ltr engine size this is seen because of the dimensions of the bore size and crank to rod ratio. 1.4ltr and lowwer are what is know as hp givers but lack torque. Very power to weight dependent.
 

SKINY

Lifer
No worries Sam :)
A popular head mod on the 3sgte engine is to swap out the exhaust cam from the 3sge na as it had a longer duration and along with adjustable pulleys 40hp was easy got with an ECU and map
 

Sam44

Member +
Yeh the same on the 407 2ltr GTi and turbo cam swaps. I was getting told on ukso that the 4efe and 4efte had the same cam set. Anyone that can read the Dyno graph can see it doesn't.
 
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