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Search: Posts Made By: hapnermw
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Forum: C6 Corvette ZR1 & Z06
08-05-2013, 09:35 PM
Replies: 8
Views: 1,278
Posted By hapnermw

Functionally, how do these differ from the RHS...

Functionally, how do these differ from the RHS piston squirters?
Forum: C6 Corvette ZR1 & Z06
07-24-2013, 07:32 AM
Replies: 397
Views: 18,155
Posted By hapnermw

My facts are correct. Your interpretation...

My facts are correct.

Your interpretation that Katech has said that TiMo exhaust valves are, in some way, inferior to the stock valves is incorrect.
Forum: C6 Corvette ZR1 & Z06
07-23-2013, 09:43 PM
Replies: 397
Views: 18,155
Posted By hapnermw

I used 'recommend' in the sense that Katech...

I used 'recommend' in the sense that Katech supports the use of TiMo exhaust valves in the LS7 valve trains they build. This is a fact.

I see this was misinterpreted by you and others to mean that...
Forum: C6 Corvette ZR1 & Z06
07-23-2013, 08:46 PM
Replies: 397
Views: 18,155
Posted By hapnermw

Actually, my post is accurate. ...

Actually, my post is accurate.

Specifically, Katech has full engineering confidence in TiMo valves as an alternative for the stock exhaust valves in LS7 engines.

My post and Jason's post did...
Forum: C6 Corvette ZR1 & Z06
07-23-2013, 01:26 PM
Replies: 397
Views: 18,155
Posted By hapnermw

It's clear from Katech's data that GM engineered...

It's clear from Katech's data that GM engineered a very stable LS7 valve train. The valves, springs, lifters, etc, appear to be designed with sufficient strength to provide a long life.
...
Forum: C6 Corvette ZR1 & Z06
07-23-2013, 01:21 PM
Replies: 397
Views: 18,155
Posted By hapnermw

Katech has long experience with the use of...

Katech has long experience with the use of titanium exhaust valves in C5R engines. They recommend the titanium exhaust valve for LS7s.

This indicates that Katech doesn't consider the sodium...
Forum: C6 Corvette ZR1 & Z06
07-17-2013, 11:47 AM
Replies: 23
Views: 7,450
Posted By hapnermw

Joe Gibbs formulated LS30 oil with the new mPAO...

Joe Gibbs formulated LS30 oil with the new mPAO synthetic base stock that Exxon has developed. This base stock has an oil viscosity index of 2.0 which is unique in the industry. It was originally...
Forum: C6 Corvette ZR1 & Z06
06-26-2013, 08:39 PM
Replies: 42
Views: 3,725
Posted By hapnermw

Morel High RPM Lifters are a better choice

Morel High RPM Lifters are a better choice
Forum: C6 Corvette ZR1 & Z06
06-26-2013, 08:35 PM
Replies: 34
Views: 19,075
Posted By hapnermw

MSD DynaForce Starter 5096 Lingenfelter...

MSD DynaForce Starter 5096
Lingenfelter Stainless Starter Heat Shiel
Forum: C6 Corvette ZR1 & Z06
06-12-2013, 08:49 PM
Replies: 31
Views: 12,974
Posted By hapnermw

http://www.lingenfelter.com/mm5/merchant.mvc?Scree...

http://www.lingenfelter.com/mm5/merchant.mvc?Screen=PROD&Product_Code=L800010000&Store_Code=LPE&Category_Code=E15#.UbkW9han5T0
Forum: C6 Corvette ZR1 & Z06
05-10-2013, 08:51 PM
Replies: 19
Views: 4,300
Posted By hapnermw

My heads/cam combination consistently fails the...

My heads/cam combination consistently fails the MAP test that throws the P0106 code.

After logging the ECM and verifying that MAP and the other PIDs show there are no operational issues. I've...
Forum: C6 Corvette ZR1 & Z06
05-07-2013, 12:00 AM
Replies: 264
Views: 15,158
Posted By hapnermw

Richie, I realize you are trying to combine...

Richie,

I realize you are trying to combine a bit of humor with your don't worry message.

It's clear that most of the stock sodium exhaust valves are pretty stout parts that can handle the...
Forum: C6 Corvette ZR1 & Z06
05-04-2013, 01:49 PM
Replies: 25
Views: 16,144
Posted By hapnermw

You should also consider Joe Gibbs LS30. It's the...

You should also consider Joe Gibbs LS30. It's the only high index of viscosity (2.0) oil I'm aware of in the viscosity range LS engines require.
...
Forum: C6 Corvette ZR1 & Z06
05-03-2013, 08:29 PM
Replies: 26
Views: 40,137
Posted By hapnermw

I'm having a similar issue. When cold, the...

I'm having a similar issue.

When cold, the starter works perfectly. When heat soaked, the starter just barely turns over at first and then gets up to speed. In some cases, all functions well...
Forum: C6 Corvette ZR1 & Z06
04-17-2013, 08:40 PM
Replies: 35
Views: 4,295
Posted By hapnermw

I found one stock lifter on the way to failure at...

I found one stock lifter on the way to failure at 30K. It had lost a retainer clip.

The best lifters are Morel High RPM linkbar lifters.

Linkbar lifters require stronger springs since they add...
Forum: C6 Corvette ZR1 & Z06
03-29-2013, 03:39 PM
Replies: 130
Views: 7,000
Posted By hapnermw

The only other possible root causes, setting...

The only other possible root causes, setting aside witchcraft :lol:, is driver abuse (including lack of maintenance) or engine modifications.

Since it is a fact that GM is now replacing some...
Forum: C6 Corvette ZR1 & Z06
03-29-2013, 03:00 PM
Replies: 130
Views: 7,000
Posted By hapnermw

This was my point ...

This was my point ...
Forum: C6 Corvette ZR1 & Z06
03-29-2013, 02:55 PM
Replies: 130
Views: 7,000
Posted By hapnermw

One expert in the area said that GM was having...

One expert in the area said that GM was having issues maintaining proper LS7 oil film thickness with its corporate mandated requirement to use 5w30 oil and solved the issue by reducing the weight of...
Forum: C6 Corvette ZR1 & Z06
03-29-2013, 02:53 AM
Replies: 130
Views: 7,000
Posted By hapnermw

It is true that GM has not stated their specific...

It is true that GM has not stated their specific rationale for use of a hollow stem sodium filled LS7 exhaust valve.

It is clear that GMs main goal was to stabilize the LS7 value train by reducing...
Forum: C6 Corvette ZR1 & Z06
01-15-2013, 12:11 AM
Replies: 25
Views: 5,017
Posted By hapnermw

Don't get your hopes up. One of the changes to...

Don't get your hopes up. One of the changes to the C7 was wider seat area to fit a better seat.
Forum: C6 Corvette ZR1 & Z06
01-10-2013, 12:03 PM
Replies: 775
Views: 81,428
Posted By hapnermw

I would second the request to add in a test of...

I would second the request to add in a test of Lunati/Morel High RPM Lifters

http://www.lunatipower.com/Media/Documents/Hi-RPM%20lifters%20PR.pdf

Since these add weight to the valve train they...
Forum: C6 Corvette ZR1 & Z06
01-03-2013, 11:50 AM
Replies: 70
Views: 19,431
Posted By hapnermw

The extra material these heads provide allow WCCH...

The extra material these heads provide allow WCCH to provide a Stage 3 CNC Port with 2.250 intake valves (stock is 2.205). So, they do, in fact, provide some unique benefits if they are ported by the...
Forum: C6 Corvette ZR1 & Z06
12-30-2012, 02:31 PM
Replies: 70
Views: 19,431
Posted By hapnermw

Since Rev SS exhaust valves with the Manley...

Since Rev SS exhaust valves with the Manley NextTek 221436 spring kit have been used extensively in LS7 heads and no known valve control issues or valve guide wear issues have surfaced, the extra...
Forum: C6 Corvette ZR1 & Z06
11-19-2012, 11:39 AM
Replies: 32
Views: 3,595
Posted By hapnermw

This thread provides many oil analysis results. ...

This thread provides many oil analysis results.

Bottom line is that Amsoil Signature Series is an excellent oil for high performance engines and that ZDDP replacement with moly and boron works...
Forum: C6 Corvette ZR1 & Z06
10-06-2012, 01:04 PM
Replies: 10
Views: 2,702
Posted By hapnermw

As per Richard, Brodix heads milled .030 bring...

As per Richard, Brodix heads milled .030 bring them to LS7 stock compression.
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