Thread: to lt1s10

Tweet

i put this motor together about six months ago when i degreed the cam i had the heads off and used a piston stop to find true tdc the ballancer lined up thats why this whole thing is so confusing

i drive it every chance i get i took some pics and downloaded to the comp how do i get them here

This might be way off base but when I said cam timing I was thinking what if you have a crank gear that has several keyways and you have it retarded 4 degrees?I do know that crank degrees are different than cam degrees because the crank moves at twice the speed of the cam.Another crazy idea.What would happen if the cam gear was drilled out to except the bushings to either retard or advance the cam and the cam was also retared 4 degrees.Whould the engine even run?And how well would it run?

not me eric this motor has a gear drive no extra keeways in the crank gear only offset bushings in the cam gear and i used the one 0 degrees i wouldnt play with what i dont know you could bend a valve or worse my cam was degreed in

did it ever run good? where did you put the cam gears? did you adv. or retard the cam gears? if you have max. vac. and your timing mark is on 38 degrees then something is wrong, unless you had the rpm set 2000 rpm's or higher. that sounds like the total timing, but that shouldnt be in below 1500 rpm's.

S19243H get your max. vac. less 2 ins., adj. your rpm's and adj. your carb, and see what you have. if youve got 15 to 16 ins. vac. @ 900 rpm's, you dont have a leak. late timing will cause low vac. also. be sure the machanical timing adv. weights in the dist. are free also.

Oh wow great thread going on here guys, sorry to butt in. I just have to say that I am curious about answers to Erik's question about the bushings and is that really possible to do? #2. The answers to the questions about the 262 comp cam package..... because I want to use that set-up in my little engine. If there is anyone that has used that set-up with success, I would surelike to hear about how you set yours up. Well appreciated guys

Also when you want to time your engine with a vacum gauge, you go right of the manifold right?

S19243H, what kind of carb do you have?

A buddy of mine had a similar issue where his motor had a "mid-throttle" lag that would disappear once the throttle was opened further. His vacuum was a little lower than normal and could not find any leaks. Called Edelbrock tech support, they mentioned that it sounded like a lean spot caused by too weak of a step up spring. They make a variety of springs that allow the rod to get pulled down into the jet based on manifold vacuum.

He installed a stiffer step-up spring and the transient lean condition disappeared.

Not sure if this is unique to Edelbrock products or if you even have an Edelbrock carb, but it sounds like you have tried a lot of stuff already...

Originally posted by brickman
Oh wow great thread going on here guys, sorry to butt in. I just have to say that I am curious about answers to Erik's question about the bushings and is that really possible to do? #2. The answers to the questions about the 262 comp cam package..... because I want to use that set-up in my little engine. If there is anyone that has used that set-up with success, I would surelike to hear about how you set yours up. Well appreciated guys

Also when you want to time your engine with a vacum gauge, you go right of the manifold right?

brickman go stright to the manifold for your vac.. on the drgreeing of the cam you can do it at the crank with the gear or dif. key in the crank or use a bushing in the cam gear. dont make no dif. which, but dont do both. 4 degrees adv. will give you a lot of bottom end. ive been both ways, ended up back stright up each time. dont know about the 262. S19243H its a lot of good ideas here, but you need to fix one thing at a time. cant keep jumping all over the place. get you timing set right and if that dont fix it then go to the next thing.

Going with lt1s10 going to get the timing right first late timing causes low vac ive tried 3 carbs on this motor with the same results edelbrok holly and now q jet no change

Originally posted by S19243H
Going with lt1s10 going to get the timing right first late timing causes low vac ive tried 3 carbs on this motor with the same results edelbrok holly and now q jet no change

ill help all i can, but you have got to take it one step at a time.