Hi Martin,
Cheers. They will be fitting them tomorrow 'our Monday' I do believe this is the issue also.
If it proves correct I will get the trunion upgrade.

 

A real good price with freight to Auckland NZ would be appreciated.
How sharp's your pencil. lol

 

Well, the Stock rockers were fitted today, the car run on the dyno & the engine nose dived at 5800rpm.
The tuner said the bad harmonics that had been there were now gone but believes the nose dive is valve float

 

Get some Tooley springs. Those Patriot Golds are no good.

 

Man, sorry to hear that it didn't fix the issue :/ PM us if there is anything we can do to help!

 

I hear what you are saying and will do.

 

Wayne,

Were you able to contact Brian Tooley? I'm sorry the shipping cost was so high.

 

Hi Martin, Yes I did. got 3-5day tracked for $69. Was good chatting with you though.

I am just praying now that the BTR springs fix this thing.
I am out of cash & out of patience, the cars been down now since 28th July

 

I appreciate your help & kind offer of parts price etc.

I needed to get these from a single source & not have a 3rd party involved like Comp for Trunion upgrade & BTR springs from else where.
Ah well, sometime within 2 weeks I will know if this will work.

 

No problem at all, we do sell BTR springs as well, but I'm glad to hear Brian was able to help you out

 

Seriously?

 

Might want to look into lifters as well. Wouldn't be the first time a GM lifter was the culprit for bad valve train dynamics.

 

This had obviously been happening with the Comp lifters I had been running & later with the LS7 Caddi lifters I had put in, so don't believe it's the lifters.

 

like to see the end results, i am running patriot stage 3 heads on my 402 with the gold springs, in the begening i could spin the engine to 7000, now it will nose dive at 6200 on the dyno graph, cam is 236-242 and crane 1.8 aluminum adjustible rocker kit, looking at swaping in some springs this winter, looking for the best springs and keeping my 1.8 adjustable kit.

 

how long have you had the ATI damper, and is it standard size or underdrive...

when they need a rebuild... things like that start to happen

 

The engine was fitted with the Trunion upgrade yesterday & the new BTR springs.
Well I got a ph call today from the tuner,
The rev limiter had been set at 6700rpm & the first pull hit the limiter, 2nd & 3rd pull on all accounts it starved for fuel at 6500rpm. I have a Walbro in tank fuel pump fitted so they are going to change the fuel filter & try again then check what the pump is flowing.
As for my inital problem of lack of revs & nose diving, it appears this is now behind me....I HOPE.

This has been a 2 part issue....Harlan Sharp rockers being to heavy on the nose I guess causing bad Harmonics with the smaller cam & Pac 1518s, then after fitment of the Tick sns stg 3 & my used dual Patriot golds, 2 issues then became apparent, the rockers & then the springs.


ATI Damper is standard & Brand new

 

Glad to hear that it's fixed, now you need to post up some numbers.

 

Not quite fixed, till it can rev without fuel starvation.

The dyno it's being tuned on reads extremely low numbers.

Where I had been reading 408rwhp with small cam on my usual tuners dyno, this one read 332.5rwhp.
So as a base run I will see how much improvement on the 332.5rwhp this new cam etc has done until I can afford a power run on my usual tuners Dyno.

 

Seriously. They lose their ability to hold their spring pressures pretty rapidly from what I've seen. The base specs for them are fine, but they don't hold them. Have you guys at PAC seen something different?

 

ahem....I may be new to LS1's but have been around the block a few times with old school SBC's.

good to see you got it going in the right direction.