Best type 1 bus engine?

[OldIronSpine]

[g3bill]

[[email protected]]

[mark tucker]

save up for a nice very mild 2332.

[rodgersbadassbus64]

I vote for a 74 stroke standard bore single-port holley bug spray. If not i vote for a 82 stroke 85.5 all else stock dual port with a rejetted 34 pict 3. Roger from Centry Auto vw parts in visala ca has one in his single cab great truck..Roger also has the the 85.5 B stroker pistions and cylinders.

[Brian]

[OldIronSpine]

[vwracerdave]

[OldIronSpine]

So no using the Porsche fan pulley either? Even when not pairing it with the crank pulley?

[jkmar73]

I built a 1776 for my bus. Basically was bone stock except for the pistons. Had to do dual duty for smog for a while. Ran great, good mileage, plenty of torque. Ran it in a 67' with reduction gears and a 3.88 r/p. Highway speeds were no problem. Hills on the other hand, toggling between 3rd and 4th a lot.
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Jake

[ozzo]

Prior to my 1955 i did a 1776 like yors with all stock.
When i added a 4 into 1 single quiet pack i immediatly felt it smoother on highway speed. .. it just feeled like it was keeping the speed easier.
When i bolted on the weber progressive it improved going uphill.

[LivinInnaVWBus]

[Alstrup]

Yes, there is nothing wrong with using a 356 alternator pulley as such. But why use another1½ to 2 hp at cruise for pulling the fan faster if there is no need (?)
There has been several solutions to get more air in over the engine over the years. Larger lower pulleys, 356 alternator pulleys etc etc. Half of the times the solution would/could have been a better engine combo for what is is supposed to be doing. If you run a high ratio, like the above menthioned 6 rib or a 3 rib with a 4,57 R/P in a bay bus, freeway flyer transmissions in split busses - and a type 1 powerplant, there is a purpose for it. Because then you would want the fan to "think" that the engine is running faster, so that you get the cooling for the actual load on the engine. When I build engines for such vehichles I do just that. But for normally (factory) ratioed cars I don´t because there is no need. No matter if the engine can pull 150 hp or factory 50 hp it still only takes about 42 hp to push a bay bus down the road at 70 mph.
Superior cooling capacity is of course a good thing if you need it. But there is always a downside. If you are setting your system upå so that it overcools the heads and cylinders it will be a VERY good thing to run a 100% thermostatic controlled oil cooling system, meaning that the stock cooler should not be present at all. Otherwise you will run into your engine oil never warming up properly, or at least take too long to do it. Cold oil is about as bad as too warm oil.

T

[OldIronSpine]

Interesting, that gives me something to think about, because I'll be upgrading the engine to a 1700T and was going to originally stick with the stock ratio but get it as a pro-street because I didn't want the engine to over heat with a FF transmission, but now that in know I can out a smaller alternator pulley on it with a FF transmission and keep the engine cool still, I might go with a pro-street FF, because VWturbokits.com had the 1774cc putting out 134 HP at 7lb. Of boost. Which is good, but I was trying to think how I can get the final drive higher while keeping the engine cool. And I think the 356 pulley will work.

[LivinInnaVWBus]

[ozzo]

Noooo alsrup....... you make some of the best combo i ve seen..... you cannot fall like this....ah ah ah 70mph 47pony on flat road..... but if you go uphill with big engine y can still go 70 but using more hp..... that s why i like 3rd gear on 4.57 r/p which is sligtly lower that stock 4th.
By the way what is diameter of 356 alt pulley and vw pulley?
Another interesting thing i ve noticed is that high rev heat oil more than going same speed at lower revs... so or the engine has lot of frictions or slowing the oil flow reduces heat dissipation...

[madmike]

Porsche pulley is 3 3/4 inches and vw stock is 4 1/4" give or take a millimeter or two
non welded fan on mine tick tick tick
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'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

[ozzo]

Ok so pretty much 95mm and 114mm which means that at 5000engine rpm fan spin like at 6000 with a stock pulley.... and at 4500rpm is like at 5400. 4000 is as 4800.... considering i stay max at 4000 maybe i ll try.... only doubt i have is: i read a pretty good test report on pulley, power pulley and flow and was noted that at 4000rpm fan speed reach maximum and at higher rev the belt just slips..... so probably something like serpentine pulley belt is needed to take advantage of this mod

[madmike]

I will never run a serpentine belt system,, (fans explode
let the belt slip a little,, saves parts,, belts are cheap,, Carrie a spare,
I have not had to replace mine yet in 3000 miles
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'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

[jfats808]

I've been running a seep belt for years. I like it. Granted there has been a few cases of folks grenading their fans. Folks, don't run a stock fan with a serp lol. I ran an out of the package EMPI welded fan for 7 years, a top speed of 141 before I let of the pedal, a couple 8k peaks, and many 7k rpm engine pulls. It never grenaded. Maybe I was lucky. So late last year I heard one of the fan "wierd" noises. I said to myself crap, I think maybe a vane was starting to come loose. Reached back and the nut was tight, fan didn't have play. Went ahead and bought a Racin Jacin fan. Got the fan and took off old one. If i didnt feel fully confident then, i do mow. Jacin's fan is very well welded. So yea, a piece of napkin was stuck to a vane making the wierd noise. Fan was perfect. All tacks holding. Moral of this story is, serpentines are ok to run with the right fan. And I have accepted that if it fails and damage occurs, it's my fault.
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2276 IDA's 86C 11-1 DD !
2017 48 Trijet DRLA's W125