MAX RPM LS-X Engine 10500 + RPM - Page 3 - LS1TECH - Camaro and Firebird Forum Discussion



Advanced Engineering Tech For the more hardcore LS1TECH residents
Sponsored by:
Sponsored by:

MAX RPM LS-X Engine 10500 + RPM

Reply
 
Thread Tools Search this Thread
Old 03-02-2017, 10:21 AM   #41
LS1Tech Sponsor
Thread Starter
 
Join Date: Jan 2009
Location: Santa Ana, CA. USA
Posts: 970
Default Dart Block @ 8.8

Hi All, I spoke to Richard and found that he has a LS Billet Block with 8.8" deck.
He stated no problem with removal of lifter/cam bores.
He stated that his oil system would work fine for this case.

The block problem of dealing with the Deck Height availability MUST demand a longer stroke.

This will lower maximum RPM to 12K ?

Lance
Pantera EFI is offline   Reply With Quote
Old 03-02-2017, 11:09 AM   #42
LS1Tech Sponsor
iTrader: (2)
 
Martin Smallwood's Avatar
 
Join Date: Oct 2015
Location: Mcleansville, NC
Posts: 576
Default

Here is what I would do then:

3.150" stroke
6.200" rod
1.025" CH piston

This would leave the piston zero decked with a 8.8" deck height and give you 327 cubic inches. With the 6.200" rod and 3.150" stroke you're still pretty close to 2:1 rod to stroke ratio (1.96:1 actual) which is what I would want for such a high RPM engine.

If the piston manufacturer thinks that a 1.025" CH will make the piston too weak, I would back the rod length down to 6.150". This would give you a 1.075" CH which in my opinion should be perfectly fine and still gives you a 1.95:1 rod to stroke ratio.

Last edited by Martin Smallwood; 03-02-2017 at 11:17 AM.
Martin Smallwood is offline   Reply With Quote
Old 03-21-2017, 09:37 AM   #43
TECH Veteran
iTrader: (21)
 
1CAMWNDR's Avatar
 
Join Date: Nov 2001
Location: NW Florida. Land of no 1/4 mile tracks.
Posts: 4,150
Default

Pantera EFI have you had any way to test your head design with respect to how the barrel valve operation and timing will affect desired intake and exhaust port and manifold runner length?

Does it still have similar characteristics as poppet valve timing-throttle bodies-cam timing have on desired port and runner length?

Will the ports in this head be in same or similar location as current heads? Or might they be raised for a more straight shot into the combustion chamber?
1CAMWNDR is offline   Reply With Quote
Old 03-23-2017, 10:49 AM   #44
LS1Tech Sponsor
Thread Starter
 
Join Date: Jan 2009
Location: Santa Ana, CA. USA
Posts: 970
Default Port Location = LS 1,2,3,7

Hi, yes a good remark, the port locations will remain the same for the exhaust.
A low hood requirement will also be important for the Intake Trumpets.
The most common port location will use the common manifolds if desired, just NO air Door.

The EAP model I use allows for runner length at MAX RPM.
That can be used for 1/2 wave tuning to predict the second torque peak RPM.

I understand your "straight shot" desire, to understand that task you would need to see my head design.

I could e-mail some pics ?

Lance
Pantera EFI is offline   Reply With Quote
Old 03-23-2017, 02:03 PM   #45
TECH Veteran
iTrader: (21)
 
1CAMWNDR's Avatar
 
Join Date: Nov 2001
Location: NW Florida. Land of no 1/4 mile tracks.
Posts: 4,150
Default

Quote:
Originally Posted by Pantera EFI View Post
Hi, yes a good remark, the port locations will remain the same for the exhaust.
A low hood requirement will also be important for the Intake Trumpets.
The most common port location will use the common manifolds if desired, just NO air Door.

The EAP model I use allows for runner length at MAX RPM.
That can be used for 1/2 wave tuning to predict the second torque peak RPM.

I understand your "straight shot" desire, to understand that task you would need to see my head design.

I could e-mail some pics ?

Lance
I see. As long as the different valve style will not alter pressure wave characteristics...or has been taken into account in the design of the intake runner and head ports.
No need to send pics, I was just curious. I bet you could even make a Hemi style head with the "valve" location rotated 90 .
1CAMWNDR is offline   Reply With Quote
Old 03-25-2017, 10:52 AM   #46
LS1Tech Sponsor
Thread Starter
 
Join Date: Jan 2009
Location: Santa Ana, CA. USA
Posts: 970
Default KHI Head

Hi, yes sure.

I made a head, KHI 250cc, with the Intake Port over the piston top AND the TWO exhaust ports on either side, a four valve head tested by Jerry Branch.
He stated that head flowed better than ALL OTHERS for the same Valve Size.

This "bike" is running to this day.

Lance
Pantera EFI is offline   Reply With Quote
Old 04-17-2017, 04:02 AM   #47
Teching In
 
Join Date: Apr 2017
Posts: 12
Default

Interesting project that's for sure. But if a LS type valve train is not going to be used it's not a LS engine is it, dare I say it, just another high revving engine. Developing the LS valve train for exceptionally high revs would be a real accomplishment and of wide practical benefit.
260DET is offline   Reply With Quote
Old 04-17-2017, 12:33 PM   #48
LS1Tech Sponsor
iTrader: (2)
 
Martin Smallwood's Avatar
 
Join Date: Oct 2015
Location: Mcleansville, NC
Posts: 576
Default

Comp is actually working with Engine Labs currently on a 11,000RPM LS engine. It will retain a conventional OHV push rod configuration.

Will be interesting to see the results between this combo and the Comp/Engine Labs combo.

There are a few 9,000-10,000RPM LS engines out there currently as well. Most make upwards of 1100hp at the crank. I can't wait to see the data and compare them!
Martin Smallwood is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Twin Turbo 83 S10 Freeman83 Conversions & Hybrids 185 02-19-2017 09:46 AM
Lean at WOT above 5k 240-Lsx PCM Diagnostics & Tuning 8 08-17-2015 12:28 PM
2004 gto bcm, rotor vs. piston Conversions & Hybrids 17 06-07-2015 03:30 PM
Where we are at with the PatriotDream.org Camaro 4Birdman Racer's Lounge 114 07-09-2010 03:33 PM
How willing are you to still help? Slow Z28 Racer's Lounge 51 09-05-2005 01:24 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 11:47 AM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: