the ultimate BUS engine

[fastfred]

hello there, as i have a crack in my engine block, i foresee to change the block ... however, getting everything out of my bus, and opening my block gives me new possibilities for building a "new" engine ...

i want an original cranck, thinking of 94mm cils and a engle 100 or 110 cam ... i still like the fact of having only one carburator ... i want a torqey engine, so i occasionnaly might pull my beetle on a towbar.

but does anybody of you have the recepy for the ultimate bus engine,
with lots of torque,
so it can pull as a tractor ???

 

[67panel]

stock crank :?: longer the stroke :lol: the more tourqe you will make = pulling power and acceleration,worth it if you have the dollar .if you do make me mr :mrgreen:

 

[fastfred]

i know, just want to stay as close as possible with stock engine, hence the stock cranck. i've been trough several engines of 2L+ in my beetle, and as they are realllllly fun to drive in a beetle, they do not give me the stock reliability i am looking for.

i even got the bits for a 84x94, but this is not an option.

 

[gninnam]

Like 67 says, to get the pull in the bus, you need a longer stroke............

 

[easy]

The ultimate bus engine will cost you ALLOT of cashola dood :shock:

 

[fastfred]

this is not about building a 2332cc 48ida fed firebreather,
it's about a smart way to get the most punch out of a 1600-1915cc without loosing reliability.

 

[easy]

I would go for a 1776 with turbo and full management system personally, would cost you some £8000 or so but would run and work ike a charm :mrgreen:

 

[fastfred]

hmmmm... now we start talking ... never considered FI, nor turbo ... seems really interesting and a logic choice but as i am really basic in technical knowledge ... i don't think it is an option.

let's do it otherwise, what do you guys think of this:

new carter ... 94mm barrels and cils, engle 100 or 110,
single carb (is the 69x94mm to big for SC ?)
OR
double kadron
(but i like to keep my vacuum asisted brakes, i like them, dunno if i can do this with double carbs)

like that,i have engine that hence the bigger cc has more power ...
with the OG carb setup, it LOOKS quite original ...
getting older you see, and appreciating keeping the original aspect in mechanics.

i know, quite boring engine ... but i am sure it would work, keep on working, and is easy to maintain, and would get good mileage ... and would not be the most expensive engine ever ... maybe the title "ultimate engine" was wrongly chosen, and must have been "ultimate reliable engine"

correct me if wrong.

 

[froggy]

Realistically you would be better off with something based around a 1776, twin carbs, maybe an uprated cam, full flow oil system.
A bigger engine in a bus also means better brakes, it no good being able to win at the traffic light grand prix if you cant stop in time for the next set of lights :?

 

[fastfred]

allready got T2d-944 brakes from Kieftenklok ... got that covered.

hmmm ... indeed, didn't think of fullflowing it ...

 

[Grazy]

Build it Fred and sling it in the back of my Panel Van :lol:

 

[Loxy]

I'm thinking that the stock crank is going to be the limiting factor in your engine - seeing as its going to be in bits why not throw a little stroker crank in there? not much clearancing to do and should be better balanced than a stocker should you rev a little higher

I currently have a homebuilt 1700 - Stock size barrels & forged pistons, 74mm crank, engle 100, 36 DRLAs merged exhaust etc that goes quite well - hoping to be toying with a bit of turbocharging over the winter once I've sorted all the interior bits out

 

[mcvw]

I'd go at least 2007 and get some very nice heads.

then have it built like it's bombproof

 

[Dirty Harry]

Hey Fred,

I drove my first miles with my newly build engine, and i must say i'm very happy with it.
It has enough torque and power, even from 3rd gear going trough a corner and it picks up beautifull and there are no rpm drops between the gears.
Engine specs: stock crank,1641cc, schleicher 292 degree cam, Riechert 34 pci carb set(polished inlet manifolds) NOS stock heads with a compressio ratio of 1:7.8 and polisched inlets ports and valves, bosch 010 distibutor and the crank, rods and flywheel are fine ballanced.
I run this engine with a modified beetle exhaust.
Oh yeah my gearbox code is CE.

 

[dubdubz]

There was a long involved thread on vzi with John Maher and looking at his data - stroke doesn't automatically increase torque and it is interesting to note but perhaps obvious..a 1745 [which I have] which is 76 x 85.5 but std cam, twin carbs and reasonable exhaust felt torquey than a 1776 with ratio rockers and a 110 cam...it is because it needs to be factored in where you want the torque...that's why with a std cam it felt torquey becasue it was being using in the 'cam's ' range.......I would imagine a 1776 with a std cam and valvetrain would feel the same as the torque/litre [I think] is pretty much the same.

If your serious then I would speak to John - he does know his onions in my opinion BUT he will want to know how you drive, where possibly?, type of driving [motorway or a roads]

The 1776 is a healthy increase in displacement that in most 'common' guises will make a bus feel better on hills etc.

If you're cracking open a case and starting from nothing then I would say 1955 [76mm] or 2007 [78mm] with the correct components and well built will be super reliable and serve you well. You may also need to consider a gbox change to benefit.

the ulimate has to be fi and ecu and around 2l displacement........

 

[stagger lee]

source a jetronic t4 engine as a core. recondition it with minor improvements. stick on t1/2 based upright cooling and you are done. it'll last forever and give all the grunt you need.

 

[fastfred]

arrrrrgggghhhhh... sorry no T4 for me !!!
the bus came with 1600cc T1 engine ... so i need to keep it that way !

 

[stagger lee]

no sweat, get a jetronic system from a t3.

 

[K@rlos]

The ULTIMATE bus engine is simple in my mind........... porsche 911 3.0L 6 cylinder, scrap the fuel injection system and bolt on some triple throat Weber carbs and a custom made stainless exhaust system

although you have to alter the engine bay of the van abit, if money was no object, thats what i'd do
A dude called Dan in woodbridge has 1 in the back of his 1965 spilt screen 8)

 

[bobley]

The ULTIMATE bus engine is simple in my mind........... porsche 911 3.0L 6 cylinder, scrap the fuel injection system and bolt on some triple throat Weber carbs and a custom made stainless exhaust system

although you have to alter the engine bay of the van abit, if money was no object, thats what i'd do
A dude called Dan in woodbridge has 1 in the back of his 1965 spilt screen 8)

I got JMR to build the ultimate camper engine for touring/towing and got a 2110 with EFI and it goes like stink yet returns reasonably good mpg (reasonable in that its better than my 1500SP in the crewcab!). It runs an FK8 cam and 1.4:1 rockers with 42/37 heads yet still pulls strongly from 2000rpm.

Keeping a stock carb on a big cc engine will always limit the power and the stock crank will limit revs unless you want to rebuild it every 5000 miles.

But I agree with WR. I've got a mates bus in the garages and we're fitting a 3.2 carrera motor in it but keeping the EFI thanks! I cant imagine how low the mpg would be with carbs!!