engine size

dubster · Post by **dubster** » Thu Nov 08, 2007 6:56 pm

ive got a motor out of a sandmaster and i want to know what size it is im not sure if my messurements are 100% corect but here goes 89mm bore and 70mm stroke...just in what region of size is?and what kind of power can i expect?

Riftvalleyvw · Post by **Riftvalleyvw** » Thu Nov 08, 2007 7:24 pm

It is probably a 69mm stroke and a 88mm bore. That would make it a 1679. If it is a 90mm bore it is a 1756.
The power will not be much different than a stock 1600 unless you change the carburation, exhaust, cam and heads.......
Good luck
Jim[/img]

Post by **calooker** » Fri Nov 09, 2007 7:18 am

Is it type1 or type4 ?

dubster · Post by **dubster** » Fri Nov 09, 2007 7:26 am

its a type 1...

Post by **calooker** » Fri Nov 09, 2007 7:31 am

Then Jim is probably spot on, BTW 88mm bore is no good, due to thin cylinder walls.

dubster · Post by **dubster** » Fri Nov 09, 2007 8:12 am

well then i dont know cause i messured it with a vernier...i messured the inside diamitor of the sleeve is that the correct place to messure it?

Post by **calooker** » Fri Nov 09, 2007 8:34 am

The biggest size sleeve you can get into a stock T1 motor is a 88mm bore sleeve. There was 90mm big bore kits available in the early 70s, now the more newer 90,5. The 1700 T4 used 90mm sleeves as well. As for the crank, if it was in a race car is it counter weighted? Some early Stroker cranks were 71 & 74 stroke.

dubster · Post by **dubster** » Fri Nov 09, 2007 8:44 am

yes it was a race motor in a sandmaster with that 38dncl4 carb with empi rockers and stronger pushrods and theres probaly a performance cam in there to its stil got oil cooler pipes going into the motor...so do you think it might have that big bore kit in?

Post by **calooker** » Fri Nov 09, 2007 8:51 am

It is possible that it has a big bore kit, ther is another way to make sure. Measure the size of the opening of the block and the base of the bottom of the sleeve as well as the thickness of the top of the cylinder walls.

dubster · Post by **dubster** » Fri Nov 09, 2007 9:12 pm

once again im not 100% sure about the messurements but the outside of the sleeve where it fits into the block..is +-91mm...

dubster · Post by **dubster** » Fri Nov 09, 2007 9:14 pm

once again im not 100% sure about the messurements but the outside of the sleeve where it fits into the block..is +-91mm...

Riftvalleyvw · Post by **Riftvalleyvw** » Fri Nov 09, 2007 9:41 pm

It is probably an 88mm bore then. What is your plan? Replace the cylinders or Install new ones?.
The oil cooler lines. Do they come from the top of the case or from the oil pump area?
If they come from the oil pump it is probably full flowed. check the oil pump. is the output port blocked?
Jim

dubster · Post by **dubster** » Fri Nov 09, 2007 11:35 pm

i think it is 88 then because the other spare sleeves i got with the motor are 88...so that gives me 1675?the lines come from the top of the case...what power might i expect out of a motor like this with a worked cam and those ratio rockers and the 38dncl4

Riftvalleyvw · Post by **Riftvalleyvw** » Sun Nov 11, 2007 11:01 pm

Ok If the lines come from the top of the case then the case is probably not full flowed. It is just an extension of the original oil cooler. doesent really do much good. You should full flow it so you can install a oil filter and a proper oil cooler.

Power depends on 4 things.
1. size of motor
2. carburation
3. ehaust
4. flow of heads.

You can get more power by changing any of the above. The most reliable way is to increase engine size. If you change your cylinders and put 94's on you will get a big boost in power without any other changes. It will however require some machine work to the heads and case. Usually this cost is under 100USD Then you can change your heads, exhaust and carburator in that order as you have money.

dubster · Post by **dubster** » Mon Nov 12, 2007 6:04 am

ok thats about 700-800 rand here,anyway where do i get does size barrels and pistons?do i have to split the case?

Aircooled VW South Africa

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