LT5 Assembly Project

[LGAFF]

I am not sure the liners are coming out. They are not in bad shape, I have someone that might come by and check the liner(to see if I am wrong in my assessment), but possibly might be just replacing pistons only.

LGAFF
92 ZR1
#234

[A26B]

I'm just saying I would hate to see you go this far, and not clean and check every part out. You"ll sleep much better at night knowing it's right.

FWIW, I agree completely. You are so deep into the engine now. I would always be concerned about the condition of the mains if I didn't see them & check the crank.

If you end up locating a set (or partial set) of stock pistons, I saw where White Racing is having a water damage sale and has a set of new OEM rings for $199.

[LGAFF]

I pulled two more pistons, amazed that anything near the edge of the piston, even a small demformaiton resulted in warping of the lip of the piston.

What is the best way to check the liner in terms of verifing it is in round? Wondering if the excess heat at ignition could distort the liner.

I will have to look at completing the entire job, I am trying to keep the cost under control. I am wondering what a set of rings, and bearings would cost? Big thing is I have a 390+rwhp motor and am in no hurry(my wife might disagree) so I really can wait and do it right.

We will see, I am doing some shopping.

Thanks everyone for your advice and support!

LGAFF
92 ZR1
#234

[XfireZ51]

Originally Posted by LGAFF

I pulled two more pistons, amazed that anything near the edge of the piston, even a small demformaiton resulted in warping of the lip of the piston.

What is the best way to check the liner in terms of verifing it is in round? Wondering if the excess heat at ignition could distort the liner.

I will have to look at completing the entire job, I am trying to keep the cost under control. I am wondering what a set of rings, and bearings would cost? Big thing is I have a 390+rwhp motor and am in no hurry(my wife might disagree) so I really can wait and do it right.

We will see, I am doing some shopping.

Thanks everyone for your advice and support!

LGAFF
92 ZR1
#234

Lee,

I wonder if the money is better spent on porting heads, or using your ported heads on current short block, re-phasing cams and leave it at that.

Originally Posted by XfireZ51

Lee,

I wonder if the money is better spent on porting heads, or using your ported heads on current short block, re-phasing cams and leave it at that.

Ding ding

[LGAFF]

Part of the reason for doing this is the educational piece. To me, there is something for doing it yourself that makes it yours. Anyone can go and buy speed.....and there is nothing wrong with that. Building something has its returns both in the satisfaction of doing it, and the long term return of knowledge.

I could have paid someone to port my intake, but now I know how and have done a few of them. I have already learned alot from Flyin Ryan, Pete, and Jeffvette. In the end, I will have a motor that will return some of my investment, porting the heads ultimately will completely depreciate out. Lets not forget with the parts I have sold, and then repurchased others at a better price I have a shortblock, heads, IH, plenum, and TB for about $1750. I also have about $2K worth of Dymags in the garage that could/will utlimately be parts money(purchased for $290). This is an interesting adventure for me, and I only need travel out to my garage a few minutes a day to experience it.

With a 21K mile Z alrady in the garage, this is the resto project that will keep me busy, and the pursuit of replacement pieces and learning is all part of the enjoyment

Thanks for the feedback, but I intend to press onward.

LGAFF
92 ZR1
#234

[Polo-1]

You might want to find a local motorcycle (2 stroke guy ) to look at your nikasil liners. Any chipping, scratches and Nikasil will start to flake off, as rings keep rubbing it.
Find a bore gauge to check if the liners are ture, or how far out they are.

[LGAFF]

Thanks, I will look into it. I did note that one of the sleeves #8 has some very small pits in it(pin head). Once I have a chance I will have it checked. Thanks for you help.

I also looked, it looks like the liner can be removed simply by removing the pistons.


LGAFF
92 ZR1
#234

[LGAFF]

Mahle is telling me crank bearings are MS 909P rods are CB663P....can anyone confirm, these appear to be standard SBC.


LGAFF
92 ZR1
#234

[flyin ryan]

Originally Posted by Polo-1

You might want to find a local motorcycle (2 stroke guy ) to look at your nikasil liners.

that's how got my experiance. around 87-88 i was racing for the factory team & Nikasil was newer technology for those guys at that time, Honda had a bunch of Japanese engineers running around with magnifying glasses & profilometers checking the cylinders out steady until they gained confidence in it. i remember at the time what they really wanted to do, more for road racing, was to develop & perfect, oval pistons. they thought Nikasil was going to put them over the top to perfect it. they were having problems getting any kind of cross-hatch in the straight portion of the bore & when you think about how a CK-10 works you can understand it being a problem. honing the corners was the easy part. last i was led to believe they could never get it to come around & shelved the program. maybe they've had oval pistons for ten years...i don't know, not my game any more but that's what was going on back then. BTW, imagine the cubes a person could get out of an LT-5 with oval pistons...i should figure that out