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Mon Feb 27, 2012 8:27 am

I have a 1700 cc type 4 in my 1972 bus, I am looking to go the performance rout and get a stroker/big bore kit, i know they sell alot for 2000cc bus. could i just get the 2000cc heads and only have to bore the block a little? i want to keep it reliable as well.. thanks in advance because i know alot of you guys know tons of info about these things. Have a great day.

Mon Feb 27, 2012 8:43 am

My goal is to have 2100cc ateast and have it a dd, with 2100cc i dont think i would have to bore much, if all.

Mon Feb 27, 2012 11:05 am

The blocks are pretty much the same up to the use of 96mm P&C. If you are planning on using this engine in a bus then you probably don't want go above 94mm for cooling purposes. If it is for a buggy or a Beetle then you can go bigger.

You can get an improvement in performance for a bus by just going to improved heads and a slightly hotter cam. Lots of info here on Samba and over on Shoptalkforums.com.

Mon Feb 27, 2012 11:20 am

yeah i was going to polish and port my heads, i cant find any performance valves for my bus, i know it sounds crazy, but i have a turbo for my bus as well, so i am wanting around 200-220 horsepower. I am just going to do the slip in 1900cc and either machine my heads or get some stock 1800cc heads because then they will all just bolt on. But i think with a good polishing and porting job i think it could run significantly better, My list for the bus now is.

-Rebuild engine with all new gaskets. -

-Racing cam-

-Polish and port the heads-

-1900cc pistons

-2 barrel Carburetor kit-

-Solid lifters-

-performance exhaust-

-Light flywheel-torque

- Turbo installed- (5psi)

-If the engine is ok to do this i will upgrade to 8 psi.

Mon Feb 27, 2012 11:28 am

With a turbo you might want to stick to 93mm P&C which will make your engine an 1800. They are nice and thick walled. HAM, Rimco, and Headflow Masters can all give you good advice and build you the heads you need.

Mon Feb 27, 2012 11:36 am

Oh ok thanks! i was just trying to use what i have mostly and polish and port them, i will abviously have a oil cooler and an electric fan.

Mon Feb 27, 2012 11:58 am

mabye you should give Jake raby a call or len Hoffman( excerpt on the type 4 heads)

http://www.aircooledtechnology.com/

http://www.hamincgroup.com/main.php

Mon Feb 27, 2012 12:37 pm

In reply to the title question. The main difference on a 1700 bock is the mechanical fuel pump hole. The 2.0 block was FI and had an electric pump.

Mon Feb 27, 2012 1:46 pm

So that meaning i could slip in the pistons from or for a 2000cc? and just change the heads?

Mon Feb 27, 2012 1:53 pm

Mon Feb 27, 2012 2:27 pm

Sweet, ill just do that to my block, prolly getting a sllip in 2100 kit now. im rebuilding the whle motor anyway.

Mon Feb 27, 2012 2:36 pm

So that what i will do, i will get 2100cc pistons and put them in my block, thank you guys very much for your help!

Mon Feb 27, 2012 2:57 pm

No offense meant but polishing and porting heads as a bolt on solution to making a bus run fast is like me thinking that just a new set of tennis shoes will make me a winner in the Olympics. Go get the Wilson book and read it. Then start planning. There are also bug me videos from Jake that will show rebuilding a T4 engine. How much money have you set aside to improve this motor?

Mon Feb 27, 2012 3:07 pm

Not really set aside Atm, im going to do it slowly but surely, im doing internals first, and working my way out, my goal is spending around 1200 on parts. so im going to be keeping some of the stuff, but mostly i will get all new parts, The bus is running really sluggish now hopefully all this will improve it.

Mon Feb 27, 2012 3:27 pm

You asked about the block, but didn't ask about the crank and rods. To build a custom engine larger than 1800 you will probably be doing a lot more than just swapping in larger piston and cylinders. You are going to need to figure in a set of rods and a crank for a 2000cc or maybe something custom.

Mon Feb 27, 2012 4:52 pm

Thanks man! well i know i can slip in 1900cc pistons and cylinders and just have to machine the head. i may just go that route.

Mon Feb 27, 2012 6:02 pm

CrJdMc wrote: Thanks man! well i know i can slip in 1900cc pistons and cylinders and just have to machine the head. i may just go that route.

Not sure what P&C you are talking about, please enlighten us.

Mon Feb 27, 2012 6:27 pm

I can't wait to see how this turns out, please post pics of your build and the results a few hundred miles down the road :?

Mon Feb 27, 2012 6:48 pm

The pistons and cylinders...
http://www2.cip1.com/ProductDetails.asp?ProductCode=ACC-C10-5211

Dont need any discouragement busdaddy thanks though.

Mon Feb 27, 2012 7:04 pm

Not trying to discourage, but I would not buy P&C's from cip1. You get what you pay for. Before you start dropping dimes on parts. Do more research. your goals are good, just not sure of the path your on. Like SGKent said, get Tom Wilson's book. Go to Raby's site and STF. T-4s can get expensive if done right and you don't want to waste your money. I'm planning a large displacement T-4 for my single cab and after months I'm still not sure what I want. 2.0 is by far the safest way to go. Any thing larger you gotta be damn sure what yer doin.