motorsci

I’ll probably just by a set of Kameari rockers there 57 grams

I read the topic That dragon fly started maybe iam simple but my plan was to measure the before and after valve train weight and figure the difference as a % then subtract that from the valve spring tension and order springs

I read the topic That dragon fly started maybe iam simple but my plan was to measure the before and after valve train weight and figure the difference as a % then subtract that from the valve spring tension and order springs

They were 78 grams and now weigh 66 Tim Z

If I understand it correctly it’s like a stack of straws when it bends

Thank you all for your input I have titanium retainers locks and DSI valves from Datsun spirt I have a good unmolested. Set of rockers to put in but just enjoying a little time off work and waiting for the machine shop have a press with a tension gauge and was going to make a fixture to measure the deflection at the tip and what it takes to break it compared to a stock rocker here is a pic it ready to polish 66 grams

This is a old rocker Iam lightening has any one else done this ? It's 10 grams lighter it's not a finished product I just started

Our local Datsun club is getting ready for our tail of the dragon trip. I have been looking into 2 way radios just curious what others have tried liked or disliked

If you think its detonation get some copper tubing and a cheep stethoscope from harbor freight pound one end of the copper tube flat and drill a hole in it bolt it on the motor close to the head were the heater hose runs is good run the tube into the car and hook up the stethoscope hose to the tube if you here detonation you know its timing if you don't a least you wont be guessing there are electronic versions of this that I own but I still use this for tuning

I talked to the turbo shop today they said there is a chance the carbon seal is ok and recommended a .060 restrictor I am going to plum a temporary pressure gauge to the turbo to make sure

it was at 1200 to 2000 rpm it ran for less than 60 seconds and I shut it off 65psi was the high number

the next question is has this damaged the turbo it has carbon seal

I think a restrictor is the answer here but what size? the current is .120

I should also mention that budget cuts have forced me to be creative with my class 2 hoard this is a stock 240z bottom with a p90 head and notched block for valve clearance. with a 280zx cam and a 280zx turbo oil pump I know it wont make as much power as a 280 turbo but its what I have and Iam sure it will be fun until the next motor. That beaning said this is very well put together hobo motor most of the time this sort of thing starts with 2 cubes of Key stone this was a clean build

The center section was replaced when it was rebuilt the compressor wheel has ate something in a previous life but was there before the rebuild I asked about replacing the wheel the re builder said it was fine