There are results out there of people swapping from YT rockers to stock and picking up power or a smoother graph. It's possible there might have been issues there as well, but that's all speculation now. I don't know if there was more power to be had with the MMS 260 head, especially on a 454. A head swap was he next logical choice for more power, imo.

I believe the short block was assembled by ERL and the heads and cam were installed by Mamo.

 

I have seen the opposite.
A roller tip does make more power.
There is less friction with a roller tip.
I would have loved to have seen if there was anymore in the Mamo top end too.
It was one of the best threads I have seen in regards to a build till it went south.

 

He's moved a few times in between then and now. His build has stalled for the most part. I believe he is working with HPR now for more cubes.

 

That would not be realistic on this build. At 750 lift it would be foolish to run a stock rocker

 

That’s great info man thanks. I was talking about the Holley low pro sniper which no doubt is going to lose 20-30hp through the midrange but will run out to 8k+ if you like to party. There aren’t a bunch out there, but there have been some really good results including Hammer with his 388 making 680whp and has track results to back up the power gains.

Darth had the low pro sniper on his last ls7 for a bit and once the newness wore off it started to feel a bit gutless.

 

It's been proven time and again that the Yellow Terra's are heavy over the nose and seem to just roll over up top. I know plenty of top name builders that will not touch them with a 10 foot pole. You just can't go wrong with the upgraded stockers to .660 lift.

 

My ls3 heads with yells terra 1.7 adjustable rockets Carrie's beautifully to 8000.
peaked at 7700

 

I weighed them myself and the YT’s are 11 grams heavier on the nose vs Oem GM rockers. This was the latest version of YT for LS7.

 

Totally different setup. Apples to oranges comparison not to mention one combination..........

 

Dude don't shoot the messenger i'm just stating the what i've been told over and over again by serious builders. How many builds do you see these on would be my first question? Just saying....

 

Or better yet how many have tried them to only ditch them to find new found power every time lol

 

Not shooting anyone. Just stating facts backed up by data. Quite a few builds on here run them without issue, but most are street builds. I’ll be the first to say that if my build were a dedicated track car living at 7k+ rpm, I would go with a Jesel Mohawk setup. But for a street build...which 99% of us on here are, the YT’s work great and live. My limiter is set at 7800 and I’ve been there a lot with no indication of valve float. Again, not arguing with you at all. I stated that the YT’s are indeed heavier, but at 11 grams, it’s easy to overcome.

 

have no idea...

 

Trust me, if they were going to help my setup they would have been on my build years ago. I was not about to go down that rabbit hole after talking to multiple builders saying good luck going there. Don't ask me ask them. Just trying to save people money and huge headaches is all but since your running them without issues everything is great right!?

 

What rockers would you use for 8000 rpm and 750 lift? What would cause you to select them?

Not a trap question. I simply cannot use stock style. Oh and the heads are already drilled and tapped for 10mm hardware too.

 

Multiple posts on the Vette forum about all the issues over the years. Just do a search and you'll be quickly awarded with evidence to back it up. Most builders will not say a word because they don't have a dog in the fight. You will see they silently will use stock upgraded OE or Jesel and Crower.

 

Totally different animal for sure. Don't even need to explain that here....

 

Yeah I know you follow. I was honestly interested to hear your opinion between Crower jesel and TD.

 

All 3 are an excellent choice but Jesel for the money and Crower if money was not an issue. I will more then likely go Crower next go time my motor gets tore down. It is all in the combo thought of course with everything. Tony knows his **** on heads and airflow. Everyone knows that but for whatever reason he will go down with the ship for some odd reason when it comes to those damn rockers lol!

 

A close friend of mine is a very respected builder. Been in the game for a VERY long time and has specialized in Vettes for over 40 years. Basically the guy putting together a 440 with stuff from Mamo. He sent all Mamo's parts to him to put it together because the shop was closer to him then Tony. When he seen the rockers in the box that he was supposed to use he just shook his head and said "way to heavy over the nose" instantly. He put it together anyway and the customer was disappointed with the power output comparable to most other builds of the same nature. Of course the first thing pointed to was the rockers in which they pulled them and "Whala" instant 25 hp at the wheels. I agree the right combo is key but shouldn't the parts been already spec'd? Just another "story" of evidence so take it for what its worth.