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Supernatural 3.7L 9,000RPM Project by La fiera
Started on: 04-27-2021 09:19 PM
Replies: 20 (296 views)
Last post by: ericjon262 on 05-14-2021 04:49 PM
La fiera
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Report this Post04-27-2021 09:19 PM Click Here to See the Profile for La fieraSend a Private Message to La fieraEdit/Delete MessageReply w/QuoteDirect Link to This Post
Before I start I want to go through the a check list;

Supernatural 3.4L 250WHP. CHECK

Supernatural 3.4L 300WHP. CHECK

Supernatural 3.7L 350WHP. RUNNING

Supernatural 3.7 9,000RPM. DEVELOPMENT STAGES/LOOK BELOW

Let start shall we!



2.8L piston weight


3.7L 9,000RPM piston weight


2.8L piston pin weight


3.7L 9,000RPM piston pin weight


Supernatural 3.4L piston/rod combo weight


3.7L 9,000RPM piston/rod combo weight


2.8L VS 3.7L 9,000RPM piston comparison


3.7L 9,000RPM rod VS Current Supernatural 3.7L rod
Even though the displacement is equally the same the difference in rod size makes for a completelly different application.
So that means a completelly different cam and intake combo are required.
I'd like to see a vendor offering different cams for two different geometries with the same displacement! They don't have the R&D on the matter.

Enjoy the journey!

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Patrick
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Report this Post04-27-2021 09:53 PM Click Here to See the Profile for PatrickClick Here to Email PatrickSend a Private Message to PatrickEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by La fiera:

Supernatural 3.7 9,000RPM

Let start shall we!



Step 1 - installation of 1" steel plate behind driver's seat.
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La fiera
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Report this Post04-27-2021 10:05 PM Click Here to See the Profile for La fieraSend a Private Message to La fieraEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Patrick:

Step 1 - installation of 1" steel plate behind driver's seat.



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Blacktree
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Report this Post04-27-2021 10:09 PM Click Here to See the Profile for BlacktreeClick Here to visit Blacktree's HomePageClick Here to Email BlacktreeSend a Private Message to BlacktreeEdit/Delete MessageReply w/QuoteDirect Link to This Post
Nah, 1/4" of AR500 steel should be fine.
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La fiera
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Report this Post04-27-2021 10:12 PM Click Here to See the Profile for La fieraSend a Private Message to La fieraEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Blacktree:

Nah, 1/4" of AR500 steel should be fine.


I might need the thickest plate behind the brake pedal!!
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La fiera
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Report this Post04-27-2021 10:14 PM Click Here to See the Profile for La fieraSend a Private Message to La fieraEdit/Delete MessageReply w/QuoteDirect Link to This Post

La fiera

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Heads are at the machine shop and the intake drawings at the fabricator.
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pmbrunelle
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Report this Post04-27-2021 10:27 PM Click Here to See the Profile for pmbrunelleClick Here to Email pmbrunelleSend a Private Message to pmbrunelleEdit/Delete MessageReply w/QuoteDirect Link to This Post
Have you thought about getting/renting a setup to test engines by themselves out of the car?

Might give more consistent results, removing the variables from the car, and also you don't have to be right next to the engine if it blows up.
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La fiera
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Report this Post04-27-2021 10:43 PM Click Here to See the Profile for La fieraSend a Private Message to La fieraEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by pmbrunelle:

Have you thought about getting/renting a setup to test engines by themselves out of the car?

Might give more consistent results, removing the variables from the car, and also you don't have to be right next to the engine if it blows up.


Kind of. I'm looking to build an engine break-in chassis for the 60*V6. I don't have patrons or sponsors so if someone wants a specific test to verivy BHP I'll be more than happy to do that for them if they can pay for it plus my R&D time.
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OH10fiero
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Report this Post04-27-2021 10:55 PM Click Here to See the Profile for OH10fieroClick Here to Email OH10fieroSend a Private Message to OH10fieroEdit/Delete MessageReply w/QuoteDirect Link to This Post
When I was going to school for engineering one of my class mates made an engine stand from some square tubing he had laying around. and brought it in for one of our teachers who needed one for a project car. they don't seem that complicated to make if you have decent welding skills as t hey are very basic. the real cost comes from the gauges and the battery needed to make it all work.
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La fiera
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Report this Post04-27-2021 11:00 PM Click Here to See the Profile for La fieraSend a Private Message to La fieraEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by OH10fiero:

When I was going to school for engineering one of my class mates made an engine stand from some square tubing he had laying around. and brought it in for one of our teachers who needed one for a project car. they don't seem that complicated to make if you have decent welding skills as t hey are very basic. the real cost comes from the gauges and the battery needed to make it all work.


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Notorio
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Report this Post04-28-2021 12:10 AM Click Here to See the Profile for NotorioSend a Private Message to NotorioEdit/Delete MessageReply w/QuoteDirect Link to This Post
How can you get proper sealing and lubrication with only two piston rings?
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Report this Post04-28-2021 12:19 AM Click Here to See the Profile for BlacktreeClick Here to visit Blacktree's HomePageClick Here to Email BlacktreeSend a Private Message to BlacktreeEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by La fiera:
I might need the thickest plate behind the brake pedal!!

hehe

I think one of these days, I'd like to give the "supernatural" treatment to an LS series V8. One of those engines tuned for 8000+ RPM should be fun.
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Patrick
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Report this Post04-28-2021 01:51 AM Click Here to See the Profile for PatrickClick Here to Email PatrickSend a Private Message to PatrickEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Notorio:

How can you get proper sealing and lubrication with only two piston rings?


I never knew they existed... until today. I found some discussion on two ring pistons Here.
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Will
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Report this Post04-28-2021 08:45 AM Click Here to See the Profile for WillClick Here to Email WillSend a Private Message to WillEdit/Delete MessageReply w/QuoteDirect Link to This Post
Did you dig up a pair of Potter heads? The spring loads required to run at that RPM stand a real chance of popping a rocker boss off production castings.
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Will
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Report this Post04-28-2021 08:50 AM Click Here to See the Profile for WillClick Here to Email WillSend a Private Message to WillEdit/Delete MessageReply w/QuoteDirect Link to This Post

Will

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quote
Originally posted by Patrick:

I never knew they existed... until today. I found some discussion on two ring pistons Here.


Note: "Must run a vacuum pump or dry sump"
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RandomTask
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Report this Post04-28-2021 01:10 PM Click Here to See the Profile for RandomTaskClick Here to Email RandomTaskSend a Private Message to RandomTaskEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
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Originally posted by Will:


Note: "Must run a vacuum pump or dry sump"


Which would almost be a given if you're spinning that fast. Windage control definitely starts to become a factor.
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La fiera
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Report this Post04-28-2021 07:08 PM Click Here to See the Profile for La fieraSend a Private Message to La fieraEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Will:


Note: "Must run a vacuum pump or dry sump"


I'm ahead of you Will, I have my version of the vacuum pump already installed. It's been installed since 2 years ago.

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La fiera
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Report this Post04-28-2021 07:17 PM Click Here to See the Profile for La fieraSend a Private Message to La fieraEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Will:

Did you dig up a pair of Potter heads? The spring loads required to run at that RPM stand a real chance of popping a rocker boss off production castings.


I'll get to that later in the build but yes, I already have that problem addressed; with the iron heads.

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Report this Post04-30-2021 11:26 PM Click Here to See the Profile for NotorioSend a Private Message to NotorioEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Patrick:

I never knew they existed... until today. I found some discussion on two ring pistons Here.


That's pretty clever ... vacuum pump keeps everything below the pistons at low pressure. I'll have to read up on this some more.
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Report this Post05-06-2021 10:50 AM Click Here to See the Profile for WillClick Here to Email WillSend a Private Message to WillEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by La fiera:


I'll get to that later in the build but yes, I already have that problem addressed; with the iron heads.


Carbon fibre pushrods and rockers?
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ericjon262
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Report this Post05-14-2021 04:49 PM Click Here to See the Profile for ericjon262Send a Private Message to ericjon262Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Will:


Carbon fibre pushrods and rockers?


I've seen tests that suggest CF and other composite pushrods really aren't good, as they flex way too much, coupled with the leverage of the rocker arm on the pushrod, removing weight there isn't really worth much compared to a lighter spring/retainer/lock and valve.

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