www.sv2s.com

Strictly Vintage 2s
It is currently Fri Aug 17, 2018 8:41 am

All times are UTC - 8 hours




Post new topic Reply to topic  [ 2 posts ] 
Author Message
Unread postPosted: Tue May 06, 2014 5:37 am 
Offline
Pyromaniac, Certified!!!
User avatar

Joined: Wed Jun 02, 2004 4:54 am
Posts: 10415
Location: Sun Diego
So, I just saw this pix in thedrambadotcom's gallery and inmediately brought to mind the thought of power to weight ratio and the often talked about issue of RGBs vs IRS or straight axle conversions, and the need for a more powerful engine and the like. Back when I did the IRS'ing on the Dormy, I first bolted on the same tires I had with the RGBs which were very TALL. Took it for a spin and for the engine to be "happy" at around 3500 rpm, the Dormy was literally flying at 95mph!!! :shock:

That was the main reason why I swap them for the rim/tire combo from the Benzo which were much smaller in diameter and on 14" rims. That made a world of difference! So it then ran at a more comfortable 75mph @ the same 3500rpm. Still can do the 95mph but that's over 4000rpm. :razz:

Anyway, the deal is that while it could achive the same with the RGBs, the tires had to "match" the gearing. I had to put the TALL tires while having the RGBs. But then run smaller juans with the IRS. However, for it all to run smoothly, the engine had to produce more power to push the bus weight. This is where the stroker crank comes in as it produces more torque. Yes, of course more horsepower too but torque is what we all need for a bus. :-k

Now, look at the pix:

Image

That could be a very fun vehicle to enjoy in the desert, but even around town, you will need some serious power in order to roll them GIGANTOMOUS tires!!! And of course the gearing on that transaxle has got to match the tires as well! That would be a perfect use for a phatchick early transaxle like the juan in the Plump Truck, which does well with the tall tires it has but tops out at around 70mph. :neutral:

_________________
The difference between a philanthropist and a liberal is that a philanthropist is generous with his own money.” Jack Kelly


Top
 Profile  
 
Unread postPosted: Tue May 19, 2015 5:51 am 
Offline
Pyromaniac, Certified!!!
User avatar

Joined: Wed Jun 02, 2004 4:54 am
Posts: 10415
Location: Sun Diego
Just stumbled unto this pix in thedrambadotcom's forum showing power/torque per rpm on a stock 1500 bus engine. :neutral:

Image

Notice how peak power is at around 4000 rpm. :-k

I cruise the Dormy at around 3500 rpm = 70+ mph. At 4000 or over, it'll be going well over 80mph!!!! 8-[


So again, the engine/gearing/tire size combo is vital in order to have a comfortable long lasting set up for a happy bus driving experience. :cool:

_________________
The difference between a philanthropist and a liberal is that a philanthropist is generous with his own money.” Jack Kelly


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 2 posts ] 

All times are UTC - 8 hours


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group