300WHP Supernatural 3.XX Coming Soon! (Page 40/54)
La fiera MAY 16, 08:49 PM

quote
Originally posted by Trinten:

If you have a computer you can leave on most of the time, I can help you setup dynamicDNS, and you could host a really basic HTML page on that computer with links to the .mp4 of the videos and a description. People could download them and watch them?

Then you can make that site part of your Signature?

Oh! You could also talk to CowsPatoot. He has a Fiero reference site out there with a lot of diagrams. He might be willing to host the videos?




Thanks Vince!
fishsticks MAY 17, 03:59 PM
I'm late to this build thread.

Just watched your YT update posted today. You mentioned maxing your 30lb injectors and stock fuel pump at the 250whp mark.

Any reason why you only made a relatively small injector upgrade (36lb) rather than using something like a Deka 60lb to get more headroom? I'm nearly positive the MS can drive them and it seems like where you want to go, you'll max 36lb injectors soon enough.

I don't have a GM example, but I did a 4.0L 60* Toyota V6 (1GRFE) that put down 397rwhp (through a 4WD truck drivetrain) @ 15psi through Deka 60s (and later Deka 80s), and idle/part throttle behaved just like stock.

Also, the motor sounds wild in that last driving video. It sounded like it may have a bit of a lean pop down low though?
La fiera MAY 17, 09:38 PM

quote
Originally posted by fishsticks:

I'm late to this build thread.

Just watched your YT update posted today. You mentioned maxing your 30lb injectors and stock fuel pump at the 250whp mark.

Any reason why you only made a relatively small injector upgrade (36lb) rather than using something like a Deka 60lb to get more headroom? I'm nearly positive the MS can drive them and it seems like where you want to go, you'll max 36lb injectors soon enough.

I don't have a GM example, but I did a 4.0L 60* Toyota V6 (1GRFE) that put down 397rwhp (through a 4WD truck drivetrain) @ 15psi through Deka 60s (and later Deka 80s), and idle/part throttle behaved just like stock.

Also, the motor sounds wild in that last driving video. It sounded like it may have a bit of a lean pop down low though?



That was an old video, the reason it posted today is because I took all the videos off YouTube and decided to put them back in. Right now I have 50lbs injectors. I don't know about that Toyo engine but It must be 4 valves per cylinders to require those big injectors and if those Deka 60s that probably require 43psi and you had them running on 15psi they are not 60s anymore, they are about 35lb due to the change in pressure. As far as the lean pop, I do that on purpose!

Will MAY 18, 08:52 AM

quote
Originally posted by La fiera:

if those Deka 60s that probably require 43psi and you had them running on 15psi they are not 60s anymore, they are about 35lb due to the change in pressure. As far as the lean pop, I do that on purpose!



He's talking 15 psi of boost pressure, not fuel pressure.
fishsticks MAY 18, 10:41 AM

quote
Originally posted by La fiera:


That was an old video, the reason it posted today is because I took all the videos off YouTube and decided to put them back in. Right now I have 50lbs injectors. I don't know about that Toyo engine but It must be 4 valves per cylinders to require those big injectors and if those Deka 60s that probably require 43psi and you had them running on 15psi they are not 60s anymore, they are about 35lb due to the change in pressure. As far as the lean pop, I do that on purpose!



Ahh the video being old makes more sense.

The Dekas were in front of a 450 Walbro. They got 48psi of fuel. The Rotrex C38 made 15psi of boost. Injector duty cycles were in the 80-85% range IIRC.

They were 4valve/cyl DOHC heads but cylinder volume is cylinder volume and HP is HP. When you're cramming air in how many valves you have doesn't matter as much.

Anyway, don't want to hijack thread. Was just curious.
La fiera MAY 18, 12:14 PM

quote
Originally posted by fishsticks:


Ahh the video being old makes more sense.

The Dekas were in front of a 450 Walbro. They got 48psi of fuel. The Rotrex C38 made 15psi of boost. Injector duty cycles were in the 80-85% range IIRC.

They were 4valve/cyl DOHC heads but cylinder volume is cylinder volume and HP is HP. When you're cramming air in how many valves you have doesn't matter as much.

Anyway, don't want to hijack thread. Was just curious.



Sorry mate, I got lost in the but now I understand. And you are right about the air cramming and valve relation. Can't wait to see your V8 running!

Thanks Will for the clarification.
La fiera MAY 20, 08:57 PM

So today I went ahead and removed the valve covers and re adjusted the valve lash. At the same time inspected everything and it's all good.
Changed the oil with fresh Mineral high ZDDP and a new filter to keep breaking the rings properlly.

I've had previosly installed some temperature strips to monitor oil temp at the filter and the pan to get an idea of what to use to increase air flow through the oil cooler.
As you can see the highest temp was 268F of oil temperature. But let me tell you, I really dogged the motor while testing it for the first time like you saw in the previous video. I did an entire hour of that in a closed circuit in an industrial park near my house.



I did the same thing with the cooling system. I installed the same temp strip at one head to monitor the highest temp and I found it just like this!



This is a screen shot of the recording of that hour of break-in. Pay attention to the white gauges, specially the left one. That is coolant temp, it's right at 150F and while looking at the entire video it was solid on 150F. The electric WP system works perfect! I'll program it to get it to 160F later on.

Now that the valves are re lashed I can start dataloging and fine tuning the MS.

[This message has been edited by La fiera (edited 05-20-2021).]

Blacktree MAY 21, 02:03 PM
Now I see why you have that giant oil cooler. Do you think a fan would help with the temperature spikes?
La fiera MAY 21, 02:43 PM

quote
Originally posted by Blacktree:

Now I see why you have that giant oil cooler. Do you think a fan would help with the temperature spikes?



Since the beginning the plan was to keep the coolant temp as low as possible (140-150F) to keep the top end cool, maintain the inlet charge as cool as possible so the motor can keep the heat were is most efficient, the combustion chamber.
The read deck lid is being modified with a big scoop to direct airflow while the car is in motion thus drawing heat from the oil cooler on demand. Oil temp target is 230-270F.
La fiera MAY 21, 09:42 PM

For the ones that don't know you may be wondering! Why did I raised the injectors hi up if they are not pointing to the cylinder below?
This picture is at the rear of the engine, which means the cylinders are 3, 2, 1, from left to right. Well, the injectors are numbered 6, 4, 2!?
Reason being becasue they feed the opposite side. I was able to locat them 7 inches higher up for better atomization and to absorb heat from the incoming air.

[This message has been edited by La fiera (edited 05-21-2021).]