1915 vs. 2332 VMC Engine and Matching Drivetrain

What you ask is an age old question. Everything is a trade off even more with these little air cooled engines. The answer to your question lies in how much the extra power means to you and what you are willing to pay in time and money. The 2332 engine will cost more of both. I would go with the 2332 without a thought but I like the power and understand the trade off's. If you like turning a wrench and understand the VW type 1 engine go for it, if you are a turn the key and drive kind of guy stick with the 1915. I hope you enjoy your speedster either way.

stick with the 1915,tried and true...i didnt, got as 2387..too much, next speedy got a 2332, better, U have to tweak it more,had alot of Weber issues

I know a lot of guys choose the smaller engines and love them but for me a 2110 is a bullet proof setup and a 2332 is probably the top and I would get Pat Downs to build it if I was going AC.  Combine that with a 3:44 R&P and you have a very nice cruising vehicle that will do 70-mph all day.  Carbs need upkeep on any car IMO, it is the nature of those beasts.

I always have to ask what is the intended use of the car? Are you a cruiser? Or do like to put your foot in it and run some twisty roads with some gusto?

My answer to drivetrain depends on your answers to those questions.

Thanks guys. I can see me doing both. Highway driving at 70mph and cruise drives on twisty country roads. The cost of the larger engine (and perhaps an upgrade to the differential and transmission) is not a factor for me. I am more concerned with solid performance and low headaches as I am a type-A guy and enjoy when my vehicles are running well with limited headaches. I am leaning towards keeping it simple and visceral with the 1915 engine.

if you do select the larger engine with an additional 30-40hp, safe to assume you will need to reduce the ring and pinion to a lower ratio?

Ok I will throw a wrench in there and suggest a 2.5L subie with a subie 5speed  tranny with reversed R&P .... now that will give you lots of torque and allow both style of driving  

I think that @Jimmy V. said it best- reread what he posted at least a couple of times.  Remember that the 4 cam Speedsters had 110-120 hp (out of 1500 cc's at about 6500 rpm so there really wasn't much below 4,000 or 4500)  so a 1915 with 110 hp (at a slightly lower redline and with more bottom end/lower midrange) with a 4.12 transaxle will be a pretty peppy car around town and with stock 1st-4th gears will still allow you to cruise on the highway at 70 mph.  That said- there's nothing like the power of a 2110, 2180 or 2332 in these cars- any of these engines just makes it that much more fun!

You could use a 3.88 r&p with a 1915 for a slightly lower rpm on the highway, but you will be trading off that around town "peppiness".  Of course, a larger engine with the 3.88 will restore most of that off the line acceleration while still giving the lower cruising rpm's- with a 4 speed there are compromises, and you can't have it all.  A 5 speed, on the otherhand, just ups the game a whole 'nother level... 

Hope this helps.  Al

@IaM-Ray posted:

Ok I will throw a wrench in there and suggest a 2.5L subie with a subie 5speed  tranny with reversed R&P .... now that will give you lots of torque and allow both style of driving  

Don't mind the "Wizard of Oz" behind the curtain over there...

I bet there is a big cost jump from a 1915 to a 2332 - stroker crank, piston rods, cam, heads, extra oil cooling, and bigger carbs --- along with the transaxle.  That cost jump is close to the Subaru swap.  Like they say pay once and feel the pain once. If you have to ask "where can I find an air cooled mechanic?" - then go with the Subaru.  Some 1915 can just be an economy build (veiled as a performance engine) --- if only the P&C are larger with the appropriate case/head machine work then you're getting only 80-90 hp. 

I tried a 1835cc and drove all around Vancouver and I really had to row to get going, I stepped into a 2110cc and it was a very good and able car.  Lived with it for 5 years.  Sold it and built a 2.5L full subie with 5 sp and reverse R&P as I suggested to you.  The engine torque band is so broad and flat with torque starting from the get go.  Very Very pleasant, turn the key and go.  I agree with Wolfgang, it is a more modern and easier to service engine and tranny combo and it supports A/C and heat much more easily.  Talk to Greg.

Thanks for all of the feedback. I hear you loud and clear on the Subie engine, but honestly, that’s not what I am looking for with my Speedster build  

I have several modern and much more powerful cars and truly want this car to be a throw back in driving feel, sound and experience.  With that said I do want a peppy car that is generally reliable. It seems that Greg’s 1915 engine should accomplish that goal, and I have a great Indy Porsche shop which can service the air cooled engine with zero concerns.

I guess what I am really asking here is will the 1915 be too slow, will the 2332 be more fussy and run hotter during the summer months and would I 100% have to upgrade to the 3.88 differential with the larger air cooled engine?  

Greg’s cost to upgrade from the 1915 >> 2332 is only $2,500.00 but when you bundle that with the 3.88 gear set the cost almost doubles at $4,500.00.  I am not sure that extra 35hp is going to be worth the combined cost and potential concerns?

I hear great things about the 1915 and have a gut feeling that Greg puts it in these as standard as it’s the sweet spot for this little car. He seems to have that 1915 dialed in with the help of the folks at CB.

i had vw's in my youth...and i don't want to upset the vw's guys....i also had old harleys & raced desert on husky's.....my point is, i'm 63 now and really don't want to wrench on stuff anymore...ergo the SUBARU 2.5 EJ25.....A/C..tons of torque...no more tinkering...laying on the ground etc....wolfy ...alb....ray...danny...are all correct...i just didn't want to be capt wet blanket for the aircooled purists..... IMHO from personal experience.....if you don't know the vw very well....the high displacement HP engines are not for you....the bigger they get the more chance of meltdown....usually at the worst possible time and location.....murphy and his law probably had vw's....just sayin'

From what I have seen, a majority of Greg’s recent builds have the 2332 motor.  Also, I think you would be leaving a lot to be desired if you went with the 2332 and stayed with the 4.12 R&P. The 3.88 or 3.44 are going to be the better transmission options for the 2332.

I spoke with Greg over the phone about his engine and transmission options before making my decision. He claims the 2332 he offers is as reliable as the 1915. It is a modest 2332 build, and could certainly be wrung out for more power. His goal with the engine is for it to be reliable.

I’m waiting on my VMC speedster, 2332 motor with 3.44 transmission, to be completed. I hope to have it within a couple of weeks. COVID related delays kept pushing it back, coupled with the fact Greg is swamped with work.

@jncspyder posted:

i had vw's in my youth...and i don't want to upset the vw's guys....i also had old harleys & raced desert on husky's.....my point is, i'm 63 now and really don't want to wrench on stuff anymore...ergo the SUBARU 2.5 EJ25.....A/C..tons of torque...no more tinkering...laying on the ground etc....wolfy ...alb....ray...danny...are all correct...i just didn't want to be capt wet blanket for the aircooled purists..... IMHO from personal experience.....if you don't know the vw very well....the high displacement HP engines are not for you....the bigger they get the more chance of meltdown....usually at the worst possible time and location.....murphy and his law probably had vw's....just sayin'

That about sums it up on why a subie is a good turnkey option.

@NJ-SpeedsterGuy Maybe the only conclusion is to fly to SLO in California and ride shotgun and I am sure a few will let you test ride cars with different engine configurations that would be the way to go otherwise you will be on the upgrade madness as we have all been on.    

Believe me when I say we are simply trying to help you form a better total picture of what you want in your build.  best

@NJ-SpeedsterGuy posted:

Thanks for all of the feedback. I hear you loud and clear on the Subie engine, but honestly, that’s not what I am looking for with my Speedster build  

I have several modern and much more powerful cars and truly want this car to be a throw back in driving feel, sound and experience.  With that said I do want a peppy car that is generally reliable. It seems that Greg’s 1915 engine should accomplish that goal, and I have a great Indy Porsche shop which can service the air cooled engine with zero concerns.

I guess what I am really asking here is will the 1915 be too slow, will the 2332 be more fussy and run hotter during the summer months and would I 100% have to upgrade to the 3.88 differential with the larger air cooled engine?  

Greg’s cost to upgrade from the 1915 >> 2332 is only $2,500.00 but when you bundle that with the 3.88 gear set the cost almost doubles at $4,500.00.  I am not sure that extra 35hp is going to be worth the combined cost and potential concerns?

I hear great things about the 1915 and have a gut feeling that Greg puts it in these as standard as it’s the sweet spot for this little car. He seems to have that 1915 dialed in with the help of the folks at CB.

That is nowhere near the cost of the a Subaru, especially if you add the Subarugears transmission.

The man wants the vintage experience, let him be.

As TwinCities said, Greg's 2332 setup is pretty reliable. It has large dual single throats. Probably about the same power as a decent(not high strung) 2110. With the auxiliary cooler it will be fine.

@NJ-SpeedsterGuy posted:

Thanks for all of the feedback. I hear you loud and clear on the Subie engine, but honestly, that’s not what I am looking for with my Speedster build  

I have several modern and much more powerful cars and truly want this car to be a throw back in driving feel, sound and experience.  With that said I do want a peppy car that is generally reliable. It seems that Greg’s 1915 engine should accomplish that goal, and I have a great Indy Porsche shop which can service the air cooled engine with zero concerns.

I guess what I am really asking here is will the 1915 be too slow, will the 2332 be more fussy and run hotter during the summer months and would I 100% have to upgrade to the 3.88 differential with the larger air cooled engine?  

Greg’s cost to upgrade from the 1915 >> 2332 is only $2,500.00 but when you bundle that with the 3.88 gear set the cost almost doubles at $4,500.00.  I am not sure that extra 35hp is going to be worth the combined cost and potential concerns?

I hear great things about the 1915 and have a gut feeling that Greg puts it in these as standard as it’s the sweet spot for this little car. He seems to have that 1915 dialed in with the help of the folks at CB.

I like the way you think. I feel the same. I want the experience of a 50’s sports car.

FWIW, I have a 2332 (JPS provided, GEM built) and the 3.88 I think (Freeway Flyer??) .  Runs the highway fine and has the requisite torque to push you through the twisties enough to scare you. I had many sorting issues.  I had many Weber (IDF44) issues.  After tinkering and fussing, these issues abated, and recently the car has been running pretty good.  Full disclosure: my first car at age 20 was a 356A coupe, 1600 normal.  I learned a lot about air cooled with that car.  Then a 356B S90, and learned a lot more.  Both daily drivers for many years.  I am a gearhead, and have tools and the inclination to fuss and fiddle.  I surely do not know it all, but I do know enough. You sound like someone who is not afflicted similarly.  you prefer to Hop in turn the key, go.  This is the reason why the Subie conversion is so popular.  Just guessing here, but I think you'd be delighted with such a drivetrain.  With more than enough punch to satisfy all requirements.

There are many options and many different car owners on this list that have changed cars or engines many times.  When I share my journey it is simply to help others and maybe save them a few hurdles and loops, as I keep saying,  most people have very little chance to try cars. I believe that knowing people’s experiences helps one choose,  in the end they have to choose and live with it. Best of journeys with your choices.