Gain extra benefits by becoming a Supporting Member Click here find out how!

Classic Performance Products Classic Parts
American Auto Wire Classic Industries
Danchuk Catalog
Hellwig Products IncPerformance Rod & CustomJoin the Community today
Ecklers AutoMotiveNu-Relics Power Windows



Username Post: What is red line on a 235?        (Topic#358130)
usmile4 
"11th Year Gold Supporting Member
Posts: 4255
usmile4
Age: 72
Loc: Aurora, Illinois
Reg: 08-12-05
09-20-19 04:22 PM - Post#2775998    

I was merging onto the interstate and had to juice it a bit. I got to wondering what is a safe maximum rpm I can push my 235?

Bill Gommel

49 chevy Styleline (Sold), 51 Styleline 2 dr Special, 235 (from a 61 truck) bored .060 over, Dual Carter/Webers, Fenton Headers, T5- 5 speed with a 56 rear end.


 


one4dad 
"6th Year" Silver Supporting Member
Posts: 1537
one4dad
Age: 76
Loc: Baton Rouge La
Reg: 01-17-10
09-20-19 06:51 PM - Post#2776015    
    In response to usmile4

Bill, got this off of stovebolt forum
Bill
Re: 235 rpm range [Re: JAMES MANSELL] #340467 Fri Nov 23 2007 08:29 AM
Joined: Dec 2004
Posts: 1,899
san francisco
Bbigbadswingdaddy Offline
Shop Shark
I believe 3200 rpm is about the top rpm you would want to run for a long period. If you build a 235 correctly you could get it to spin in the 6000 and 7000 range, but that would be a race motor and you would be eating up main and rod bearings very quickly. When it comes down to it the 235 only has 4 main bearings and a long wobbly crankshaft. The faster you spin the engine the more wobble you get.

Run all day at 3200, redline at 4000, absolute redline at 4500.

The 235 is not very economical spinning at 3200 rpm, so you don't want to be near there for cruising rpms. I would think you would be happy if your engine was right at 2000- 2400 range at 70mph. That means the 2.73 gears with overdrive will not suit your needs. You would probably want to be in the 3.55 through 4.11 range if you are running an overdrive, but that also depends on the overdrive ratio.

What does this all mean? Give us more info on how you want to use your truck. If you want economy, you would choose higher gears... say 3.55 with overdrive. If you want to use your truck like a truck for towing (doubtful with the selection of a t5) you would use the lower gears like a 4.11. Midrange gears like the 3.73 may give you the best of both worlds. The 2.73 gears would work well without an overdrive assuming you have a steep first gear. It may be hard to get your truck started on a hill with such a high gear ratio. Towing would be out of the question.


Bill Wilson 50 styleline deluxe 2 door sold,- 51 styleline Deluxe 2 door ,'56 235 with dual carter webers on an Offenhauser intake, Fenton headers, 56 chevy rear end and 700R4 transmission.


 
rrausch 
"15th Year" Silver Supporting Member
Posts: 14075
rrausch
Loc: L.A, Cal. & St. Louis...
Reg: 04-07-03
09-20-19 08:29 PM - Post#2776017    
    In response to one4dad

When I was running my '54 pickup as my daily driver, I'd take it on 3,200 mile trips once or twice a year. I'd run it at 67 mph 10 to 12 hours a day. It had a 3.55 rear-end but I never had a tach in it. Trans was a granny-gear 4-speed. I put 90,000 miles on the 235 in that truck and it ran great when I sold it.



1953 210 Convertible, 261 with dual Carter YF 966S carbs, P.S., Remote Bendix P.B. Booster... shade-tree restoration about done.




 
usmile4 
"11th Year Gold Supporting Member
Posts: 4255
usmile4
Age: 72
Loc: Aurora, Illinois
Reg: 08-12-05
09-21-19 05:26 PM - Post#2776082    
    In response to rrausch

With my trans and rear end my cheap tach shows right at 2200 rpm @ 70 mph when I'm in 5th gear. I'm pleased with how it runs and performs at 2500 rpm and below. I was just wondering how high I could safely push it if needed, not for any extended time but just going through the gears from a stop light etc.

Bill Gommel

49 chevy Styleline (Sold), 51 Styleline 2 dr Special, 235 (from a 61 truck) bored .060 over, Dual Carter/Webers, Fenton Headers, T5- 5 speed with a 56 rear end.


 
wbeaton 
Contributor
Posts: 684
wbeaton
Age: 45
Loc: Hamilton, ON
Reg: 03-07-14
09-27-19 12:27 PM - Post#2776584    
    In response to usmile4

My understanding is that things start to come apart after 4500 rpm. I still have the original 3 speed so I don’t do any power shifting. Shifting at 3000 rpm is about as high as I let it go according to the tach on my dash.

1951 Chevy Styleline Deluxe 2 Door Sedan
1954 235 with Isky Cam, Shaved Head
Dual Carter YF 787S Carbs on Offenhauser Intake
Split Manifold Dual Exhaust
3 Speed with 3.55 Differential
12V Conversion with Alternator
Pertronix Ignition


 


Icon Legend Permissions Topic Options
Report Post

Quote Post

Quick Reply

Print Topic

Email Topic

329 Views
FusionBB
FusionBB™ Version 2.1
©2003-2006 InteractivePHP, Inc.
Execution time: 0.088 seconds.   Total Queries: 16   Zlib Compression is on.
All times are (GMT -0800) Pacific. Current time is 10:18 PM
Top