6 bolt rebuild swap for 95tsi

[ZHebes66]

Im in college for auto tech and I have a 95 eagle talon tsi. Im rebuilding a 6 bolt to swap into it. I had bought a motor about a year ago or so and it sat in the shop til now. This semester we have an engine rebuild class so I brought it to school and am going to start rebuilding it. But I just got the motor all the way apart and found that it wasnt stock. It has arp head studs arp main bolts acl rod and main bearings eagle H beam rods and wiseco stroker pistons but im suck on trying to figure out if the crankshaft is stock or a stroker crank

[ZHebes66]

I need help figuring out what the crank is because it has no markings on it but a stamp of 10d on it

[tpunx99GSX]

If you rotate the crank and the pistons reach the top of the block, it is a stroker crank. (If those are in fact stroker pistons). Stroker pistons are shorter in height, allowing for the stroker crank to move them further up and down (without smacking the head).

[Halon]

Yup, what Tom said would be a quick simple check. One other tid bit of info is that a stock crank has an 88mm stroke, while the typical 2.4 crank (stroker crank) would have a 100mm stroke.

You are certain that the pistons are stroker pistons?

[123abc]

He told me he ran the numbers on the tops of the pistons and found one place online that sells them. He said they were stroker pistons out of Canada if I remember right (we're rebuilding the engine as a pair in class).

[tpunx99GSX]

Originally Posted by 123abc

He told me he ran the numbers on the tops of the pistons and found one place online that sells them. He said they were stroker pistons out of Canada if I remember right (we're rebuilding the engine as a pair in class).

Does the teacher consider posting on forums part of research? hahah.
Pull the pistons, if you have a stock one to match it up with the stock will be about a CM taller. That will tell you right there whether they are stroker pistons.
I am going to assume you have a stroker crank as you would have noticed right away that the pistons done reach the top of the cylinder.

[123abc]

Originally Posted by tpunx99GSX

Does the teacher consider posting on forums part of research? hahah.
Pull the pistons, if you have a stock one to match it up with the stock will be about a CM taller. That will tell you right there whether they are stroker pistons.
I am going to assume you have a stroker crank as you would have noticed right away that the pistons done reach the top of the cylinder.

Actually the teacher is pretty useless....


Jake stopped over today and pointed out how deep of a dish they have. Much more than stock pistons. Now that you mention it, I might have my old pistons sitting in my garage. I could bring them with tomorrow and compare the two.

[tpunx99GSX]

Originally Posted by 123abc

Actually the teacher is pretty useless....


Jake stopped over today and pointed out how deep of a dish they have. Much more than stock pistons. Now that you mention it, I might have my old pistons sitting in my garage. I could bring them with tomorrow and compare the two.

What do you mean Deep of a dish? This usually only affects the Compression ratio. The piston as a whole will be less height than the stock piston if its a stroker. The dish is C/R.
When i was going through my fiasco with piston ordering, It started out with a piston being bought that turned out to be a stroker piston which i didnt realise until after it was installed and i was getting ready to put on the head when i noticed that the one piston wasnt going to the top of the wall.
After figureing out that we ordered another piston from mahle, which turned out to be a 9.x piston and was completly noticable by the dish being smaller in diameter than the other three pistons. (which were 8.7:1 pistons)

[123abc]

I'll have to bring the camera to school and snap pics or something. They just look like 7 something to 1 compression.

[ZHebes66]

Part number is 6571M855. Stroker Wiseco Pistons (0.020" over) with a 8.3:1 compression ratio.