Notices
C6 Corvette ZR1 & Z06 General info about GMs Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track Advertisement

[Z06] Hi-Ram Install: Complete

 
Old 08-15-2018, 10:09 PM
  #1  
Da Z06
CF Senior Member
Thread Starter
 
Da Z06's Avatar
 
Member Since: Aug 2014
Location: GA
Posts: 897
Received 66 Likes on 60 Posts
Default Hi-Ram Install: Complete

Well,

After 2 or so weeks of intermittent work On the Z was able to finalize my Holly Hi-Ram install

I want to thank Josh and Jonathan for answering all my questions. Their contributions and sharing their lessons learned made my installation much easier.

Here are a few pics!


















Da Z06 is offline  
The following 2 users liked this post by Da Z06:
Josh B. (08-16-2018), thetastelingers (08-16-2018)
Old 08-15-2018, 10:23 PM
  #2  
MTPZ06
CF Senior Member
Support Corvetteforum!
 
MTPZ06's Avatar
 
Member Since: Dec 2008
Location: Honolulu HI
Posts: 13,338
Received 1,209 Likes on 1,065 Posts
Default

Hi-Ram...its the new MSD. When do you test for results?
MTPZ06 is offline  
Old 08-15-2018, 10:48 PM
  #3  
Da Z06
CF Senior Member
Thread Starter
 
Da Z06's Avatar
 
Member Since: Aug 2014
Location: GA
Posts: 897
Received 66 Likes on 60 Posts
Default

Originally Posted by MTPZ06 View Post
Hi-Ram...its the new MSD. When do you test for results?
Cant fear change.

Will be tuned soon, will keep all inforned
Da Z06 is offline  
Old 08-15-2018, 10:52 PM
  #4  
MTPZ06
CF Senior Member
Support Corvetteforum!
 
MTPZ06's Avatar
 
Member Since: Dec 2008
Location: Honolulu HI
Posts: 13,338
Received 1,209 Likes on 1,065 Posts
Default

Cool...what other changes to your combo? Cam, etc?
MTPZ06 is offline  
Old 08-16-2018, 02:33 AM
  #5  
Josh B.
CF Senior Member
 
Josh B.'s Avatar
 
Member Since: Nov 2014
Location: Libertyville, IL
Posts: 2,545
Received 513 Likes on 381 Posts
Default

Originally Posted by MTPZ06 View Post
Hi-Ram...its the new MSD. When do you test for results?



Last edited by Josh B.; 08-16-2018 at 02:38 AM.
Josh B. is offline  
The following 2 users liked this post by Josh B.:
MTPZ06 (08-16-2018), Sled Driver (08-16-2018)
Old 08-16-2018, 03:46 AM
  #6  
MTPZ06
CF Senior Member
Support Corvetteforum!
 
MTPZ06's Avatar
 
Member Since: Dec 2008
Location: Honolulu HI
Posts: 13,338
Received 1,209 Likes on 1,065 Posts
Default

Originally Posted by Josh B. View Post
MTPZ06 is offline  
Old 08-16-2018, 09:05 AM
  #7  
BigVette427
CF Senior Member
 
BigVette427's Avatar
 
Member Since: Aug 2013
Location: Hill Country Texas
Posts: 911
Received 146 Likes on 103 Posts
Default

That might fit under the hood of my L86 Yukon. What are the advantages of the Holley Hi-Ram over their Sniper low-profile intake manifold? Good call on the PSI valve springs and Johnson lifters. You're the first that I've seen run the new PSI 1516ML's, what are the aproximate lifts of your cam that had you go with that spring over the 1511ML?



BigVette427 is offline  
Old 08-16-2018, 10:33 AM
  #8  
Unreal
CF Senior Member
 
Unreal's Avatar
 
Member Since: Nov 2007
Location: Gilbert AZ
Posts: 22,293
Received 1,462 Likes on 1,241 Posts
Default

Runner length determines power band/etc. Most people can't utilize a short run setup, unless they are going for 7-9k RPM. The highram makes great power and good top end from 3-7k. Cheap china sheet metal intakes also have their own issues with flexing/fitment/etc.
Unreal is offline  
Old 08-16-2018, 10:56 AM
  #9  
Extreme Engineering
CF Senior Member
 
Member Since: Dec 2009
Location: Houston TX
Posts: 259
Likes: 0
Received 1 Like on 1 Post
Default

I've always like the Hi-ram for it's intense looks...… just wondering - is there enough room for the TB to be rotated 90 degrees to point the stepper motor down towards the water pump? I know that it would take a ~1/2 - 3/4" adapter plate to accomplish, but would it clear? I think that it would clean up the lines and make for a better looking fitment on the hood!
Thanks,
Fred
Extreme Engineering is offline  
Old 08-16-2018, 01:31 PM
  #10  
Da Z06
CF Senior Member
Thread Starter
 
Da Z06's Avatar
 
Member Since: Aug 2014
Location: GA
Posts: 897
Received 66 Likes on 60 Posts
Default

Originally Posted by BigVette427 View Post
That might fit under the hood of my L86 Yukon. What are the advantages of the Holley Hi-Ram over their Sniper low-profile intake manifold? Good call on the PSI valve springs and Johnson lifters. You're the first that I've seen run the new PSI 1516ML's, what are the aproximate lifts of your cam that had you go with that spring over the 1511ML?


The PSI 1516 spring provided me with more pressure over the 1511 or 1515. By discussing with a PSI engineer over multiple telephonic conversations and emails and having access to the Engine/Valve train Development Program Manager at the Chevy COPO program they botyh strongly recommended the 1516 for my combination.

They both recommended to install as close to .050" CBC so I set them to a nominal 1.790" intake, 1.780" on the exhaust. Actual came out an average of 1.792" in and 1.783" on the exhaust.

As assembled the spring specs came out (given the lift of my cam) to:

Intake:

153.3lb Seat
422.0lb Open
1.792" Install Height
.055 CBC

Exhaust
157.0lb Seat
422.0lb Open
1.783" Install Height
.055 CBC

Intake/Exhaust weights came out to:

149g vs 179g stock on the intake
147g vs 177g stock on the exhaust
So far I have been more than pleased with this spring. Cant wait to see how it performs around 7500RPMs.
Da Z06 is offline  
The following users liked this post:
jayyyw (08-19-2018)
Old 08-19-2018, 09:16 AM
  #11  
jayyyw
CF Senior Member
 
Member Since: Jun 2015
Location: Austin Tx
Posts: 3,240
Received 300 Likes on 266 Posts
Default

Looks great! Can't wait to see the results. Did you happen to get a before pull on the dyno you plan to use?
jayyyw is offline  
Old 08-19-2018, 10:18 AM
  #12  
hy_bmw_freak
CF Senior Member
 
Member Since: Aug 2018
Location: Germany
Posts: 106
Received 4 Likes on 4 Posts
Default

How much is the difference between Hi ram and Ported Msd ???
Is it worth???

And when I need a high ram intake??
with big ported heads and big cam?? I think on a stock heads with small or mild Cam isn't worth or not?
hy_bmw_freak is offline  
Old 08-19-2018, 11:53 AM
  #13  
RobGOV-DCZ
CF Senior Member
 
Member Since: May 2016
Location: Washington DC
Posts: 294
Received 51 Likes on 38 Posts
Default

Absolutely hideous
RobGOV-DCZ is offline  
Old 08-19-2018, 11:58 AM
  #14  
jayyyw
CF Senior Member
 
Member Since: Jun 2015
Location: Austin Tx
Posts: 3,240
Received 300 Likes on 266 Posts
Default

Originally Posted by RobGOV-DCZ View Post
Absolutely hideous
You looking in the mirror again?
jayyyw is offline  
The following users liked this post:
Zed_six (09-19-2018)
Old 08-19-2018, 12:02 PM
  #15  
RobGOV-DCZ
CF Senior Member
 
Member Since: May 2016
Location: Washington DC
Posts: 294
Received 51 Likes on 38 Posts
Default

RobGOV-DCZ is offline  
Old 08-19-2018, 03:32 PM
  #16  
MTPZ06
CF Senior Member
Support Corvetteforum!
 
MTPZ06's Avatar
 
Member Since: Dec 2008
Location: Honolulu HI
Posts: 13,338
Received 1,209 Likes on 1,065 Posts
Default

Originally Posted by hy_bmw_freak View Post
How much is the difference between Hi ram and Ported Msd ???
Is it worth???

And when I need a high ram intake??
with big ported heads and big cam?? I think on a stock heads with small or mild Cam isn't worth or not?
Hi-Ram is needed when your parts combo is performing at a level where a ported MSD becomes the bottleneck or the limiting factor in your build.

Stock heads with small to medium cam...the Hi-Ram would hurt your build.
MTPZ06 is offline  
Old 08-19-2018, 04:19 PM
  #17  
Che70velle
CF Senior Member
 
Che70velle's Avatar
 
Member Since: Jan 2017
Location: Dawsonville Ga
Posts: 117
Received 11 Likes on 9 Posts
Default

The high ram craze is building. What kind of numbers are you guys seeing? Anybody have dyno results vs. ported MSD? What is it doing to your power band vs. ported MSD?
I don’t think I’ve come across any results yet. I’ve got enough room in my Chevelle to stack two of these..lol.


Last edited by Che70velle; 08-19-2018 at 04:20 PM. Reason: i can’t smell, I mean spell...
Che70velle is offline  
Old 08-19-2018, 05:03 PM
  #18  
jayyyw
CF Senior Member
 
Member Since: Jun 2015
Location: Austin Tx
Posts: 3,240
Received 300 Likes on 266 Posts
Default

Originally Posted by Che70velle View Post
The high ram craze is building. What kind of numbers are you guys seeing? Anybody have dyno results vs. ported MSD? What is it doing to your power band vs. ported MSD?
I don’t think I’ve come across any results yet. I’ve got enough room in my Chevelle to stack two of these..lol.


Same cam, only change was the hi ram, graphs pretty much overlayed until 5800 where the hi ram started to make more power (608whp). I was having some valvetrain stability issues up top so power flatlined after it passed the mamo msd. Had my heads redone, new springs, installed a slightly smaller cam and ended up making 646whp.

For reference, 2 similar combos on the same dyno:
LME heads, e85, RPM B3, Mamo MSD, ARH 2" headers - Made 617whp/532wtq
LME heads, e85, RPM B3, Ported MSD, Kooks 1-7/8" headers - Made 630whp/515wtq

My combo:
LME heads, e85 RPM B3, Holley Hi Ram, ARH 1-7/8" headers - Made 646whp/536wtq

The second car (630whp) made that in fall weather. The other and my car made that power in Texas Summer. Same dyno and tuner.

I have a build thread with my hi ram journey if you search my name.

The 617whp car, prior to the Mamo MSD, trapped a best of 133mph @ 597whp with a factory FAST manifold.
My best trap with the Mamo MSD and 602whp was 136mph.

Last edited by jayyyw; 08-19-2018 at 05:04 PM.
jayyyw is offline  
The following users liked this post:
Zed_six (09-19-2018)
Old 08-19-2018, 05:32 PM
  #19  
hy_bmw_freak
CF Senior Member
 
Member Since: Aug 2018
Location: Germany
Posts: 106
Received 4 Likes on 4 Posts
Default

Can you tell me your Cam specs before and after because slightly smaller make a lot difference...

also you have dyno compared your car with mamo msd 608whp and with Holley hi ram and slightly smaller cam 646whp that's right??

Last edited by hy_bmw_freak; 08-19-2018 at 05:32 PM.
hy_bmw_freak is offline  
Old 08-19-2018, 05:41 PM
  #20  
jayyyw
CF Senior Member
 
Member Since: Jun 2015
Location: Austin Tx
Posts: 3,240
Received 300 Likes on 266 Posts
Default

Originally Posted by hy_bmw_freak View Post
Can you tell me your Cam specs before and after because slightly smaller make a lot difference...

also you have dyno compared your car with mamo msd 608whp and with Holley hi ram and slightly smaller cam 646whp that's right??
yes
jayyyw is offline  

Thread Tools
Search this Thread
Quick Reply: [Z06] Hi-Ram Install: Complete


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: